ATAD3A Antibody, Biotin conjugated

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Description

Definition and Mechanism

ATAD3A is a mitochondrial membrane protein critical for maintaining mitochondrial dynamics, apoptosis resistance, and mtDNA stability . Biotin-conjugated antibodies exploit the high-affinity binding between biotin and streptavidin/avidin to amplify signal detection. While no commercial biotin-conjugated ATAD3A antibodies are explicitly listed in available sources, standard conjugation protocols apply:

  • Biotinylation: Covalent attachment of biotin to lysine or cysteine residues on the antibody’s Fc region.

  • Applications: Enhanced sensitivity in assays requiring secondary detection (e.g., streptavidin-HRP or streptavidin-fluorophores).

Mitochondrial Dynamics and Apoptosis

ATAD3A antibodies are pivotal in studying mitochondrial fragmentation and apoptosis:

  • Anti-Apoptotic Role: Silencing ATAD3A in lung adenocarcinoma cells increases mitochondrial fragmentation and cisplatin sensitivity .

  • Mitophagy Regulation: ATAD3A suppresses PINK1-dependent mitophagy by stabilizing mitochondrial cristae and mtDNA . Biotin-conjugated antibodies could enhance detection in mitophagy assays.

Cancer and Immunotherapy

  • Therapeutic Resistance: High ATAD3A expression correlates with poor responses to immunotherapy (e.g., PD-1/PD-L1 inhibitors) in triple-negative breast cancer (TNBC), as it disrupts PD-L1 mitochondrial redistribution .

  • Biomarker Potential: ATAD3A levels predict survival outcomes in chemoimmunotherapy . Biotin-conjugated antibodies may improve IHC sensitivity for clinical diagnostics.

Hematopoietic Development

  • Hematopoietic Stem Cell (HSC) Regulation: ATAD3A deficiency skews HSC differentiation, increasing myeloid progenitors while reducing erythroid and B-cell lineages . Antibodies enable tracking ATAD3A’s role in lineage commitment.

Limitations and Considerations

  • Cross-Reactivity: Unconjugated ATAD3A antibodies may cross-react with ATAD3B/C due to sequence similarities . Biotin conjugation does not resolve this but requires optimization.

  • Species Specificity: While most antibodies target human/mouse/rat, validation in other models (e.g., zebrafish) is lacking.

  • Conjugation Efficiency: Biotinylation can alter antibody affinity; titration is critical for optimal performance.

Future Directions

  • Therapeutic Targeting: Inhibiting ATAD3A to enhance chemoimmunotherapy efficacy, as shown in TNBC models .

  • Biotin-Specific Innovations: Developing biotin-conjugated ATAD3A antibodies for multiplex assays or single-cell analysis.

Key References

  1. ATAD3A in Cancer: Anti-apoptotic role in lung adenocarcinoma .

  2. Mitophagy Regulation: ATAD3A-PINK1 axis in mitochondrial homeostasis .

  3. Immuno-oncology: ATAD3A as a biomarker for immunotherapy resistance .

Product Specs

Buffer
Preservative: 0.03% Proclin 300
Constituents: 50% Glycerol, 0.01M PBS, pH 7.4
Form
Liquid
Lead Time
We typically dispatch orders within 1-3 business days of receipt. Delivery times may vary based on shipping method and location. Please consult your local distributors for specific delivery timeframes.
Synonyms
ATAD3A; ATPase family AAA domain-containing protein 3A
Target Names
ATAD3A
Uniprot No.

Target Background

Function
ATAD3A plays a crucial role in mitochondrial function, influencing mitochondrial network organization, metabolism, and cell growth at both the cellular and organismal level. This protein is likely involved in mitochondrial protein synthesis and may participate in mitochondrial DNA replication. Its potential binding to mitochondrial DNA D-loops suggests a contribution to nucleoid stability. ATAD3A is also associated with enhanced cholesterol channeling for hormone-dependent steroidogenesis and is implicated in mitochondrial-mediated antiviral innate immunity.
Gene References Into Functions
  1. Deletions in the ATAD3A region have been linked to cerebellar dysfunction, characterized by alterations in mitochondrial DNA and cholesterol metabolism. PMID: 28549128
  2. Whole-exome sequencing has identified a recurrent de novo ATAD3A c.1582C>T (p.Arg528Trp) variant in five unrelated individuals, presenting with a core phenotype encompassing global developmental delay, hypotonia, optic atrophy, axonal neuropathy, and hypertrophic cardiomyopathy. PMID: 27640307
  3. Mutations in ATAD3A can be inherited in a dominant manner, leading to diverse neurological phenotypes, including hereditary spastic paraplegia with intrafamiliar variability. This finding expands the group of mitochondrial inner membrane AAA proteins associated with spasticity. PMID: 28158749
  4. Stabilization of WASF3 function occurs through its interaction with ATAD3A and GRP78, potentially providing a bridge between the endoplasmic reticulum and mitochondria, facilitating communication between these organelles. PMID: 25823022
  5. Research indicates that ATAD3-mediated mitochondrial membrane formation plays a role in the efficient transfer of cholesterol from the endoplasmic reticulum to mitochondria. PMID: 25375035
  6. High ATAD3A expression has been correlated with radioresistance in glioblastoma. PMID: 24057885
  7. Studies have confirmed the existence of alternative splicing in rodent ATAD3A mRNA and identified multiple mRNA isoforms in humans. PMID: 24239551
  8. ATAD3B serves as a negative regulator of ATAD3A and may function as an adaptor in maintaining mitochondrial homeostasis and metabolism in human pluripotent embryonic stem cells and cancer cells. PMID: 22664726
  9. An engineered high copy strain expressing human ATAD3A-Myc-HIS at a significant level (2.5mg/l of yeast culture) was created without substantially affecting yeast growth. Urea-denaturated ATAD3A-Myc-HIS bound to agarose-nickel beads and could be renatured and eluted. PMID: 22542587
  10. ATAD3 may be involved in an unknown but essential and growth-linked mitochondrial function that has existed since the development of multicellular organisms and plays a role in tumorigenesis. PMID: 22318359
  11. Research indicates that HPV infection correlates with increased ATAD3A expression and drug resistance in uterine cervical cancer. PMID: 21743956
  12. ATAD3 might be implicated in an unknown but essential and growth-linked mitochondrial function that has existed since the development of multicellular organisms and is involved in tumorigenesis. PMID: 22192748
  13. Silencing of ATAD3A expression reduced PSA secretion and cisplatin resistance, suggesting that ATAD3A is associated with PSA secretion and drug resistance in prostate cancer. PMID: 21584487
  14. Gene expression in lung adenocarcinoma has been correlated with drug resistance and poor prognosis. PMID: 20332122
  15. Studies have shown that the N-terminal portion of ATAD3A is located outside the inner mitochondrial membrane, while the C-terminal part is within the matrix. PMID: 20349121
  16. Research indicates that ATAD3A is a calcium-dependent S100B target protein in oligodendrocyte progenitor cells. This suggests that S100B might assist newly synthesized ATAD3A protein in proper folding and subcellular localization. PMID: 20351179
  17. Data indicate that the mitochondrial AAA(+) ATPase protein ATAD3A is involved in dynamic interactions between components of the outer and inner mitochondrial membranes, which control a range of critical mitochondrial functions. PMID: 20154147
  18. Research suggests that mitochondrial DNA displacement loops serve to recruit ATAD3 protein for the formation or segregation of mitochondrial nucleoids. PMID: 17210950
  19. Studies have shown that the loss of ATAD3A/3B may be implicated in the transformation pathway and the chemosensitivity of oligodendrogliomas. PMID: 18639545

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Database Links

HGNC: 25567

OMIM: 612316

KEGG: hsa:55210

STRING: 9606.ENSP00000368030

UniGene: Hs.23413

Involvement In Disease
Harel-Yoon syndrome (HAYOS)
Protein Families
AAA ATPase family
Subcellular Location
Mitochondrion inner membrane; Single-pass membrane protein. Mitochondrion matrix, mitochondrion nucleoid.
Tissue Specificity
Overexpressed in lung adenocarcinomas (at protein level).

Q&A

What is ATAD3A and why is it significant in mitochondrial research?

ATAD3A is an essential protein involved in multiple mitochondrial functions including network organization, metabolism, and cell growth regulation. It serves as a critical mediator in mitochondrial protein synthesis and plays important roles in mitochondrial DNA replication and nucleoid stability . ATAD3A is particularly significant because it binds to mitochondrial DNA D-loops, contributes to processes like hormone-dependent steroidogenesis, and is involved in mitochondrial-mediated antiviral innate immunity . Recent research has identified its role in protecting mitochondria from the PERK-mediated unfolded protein response and in the mitochondrial DNA damage response pathway, making it a valuable target for investigating mitochondrial stress responses .

What detection methods can be used with biotin-conjugated ATAD3A antibodies?

Biotin-conjugated ATAD3A antibodies offer versatile detection capabilities across multiple experimental platforms. These antibodies are specifically designed for enhanced sensitivity in immunoassays through the strong biotin-streptavidin interaction system. According to available data, these conjugated antibodies can be effectively used in:

  • Western Blot (WB): Recommended dilution range of 1:300-1:5000

  • Immunohistochemistry on paraffin-embedded tissues (IHC-P): Optimal dilution range of 1:100-1:400

  • ELISA assays: As components in sandwich ELISA configurations

  • Flow cytometry: For intracellular detection applications

  • Immunofluorescence (IF): For subcellular localization studies

These biotin-conjugated antibodies are particularly advantageous when working with complex tissue samples or when signal amplification is required for detecting low-abundance ATAD3A protein.

How should samples be prepared for optimal ATAD3A detection using biotin-conjugated antibodies?

For optimal detection of ATAD3A using biotin-conjugated antibodies, proper sample preparation is critical:

  • Tissue/Cell Lysate Preparation:

    • Use appropriate lysis buffers containing protease inhibitors

    • For mitochondrial proteins like ATAD3A, consider using specialized mitochondrial isolation protocols prior to antibody application

    • Process samples quickly and maintain cold temperatures to prevent protein degradation

  • Fixation for Immunohistochemistry:

    • Formalin-fixed paraffin-embedded (FFPE) tissues should be deparaffinized and subjected to antigen retrieval

    • Heat-induced epitope retrieval methods are generally effective for ATAD3A detection

  • Sample Types Validated:

    • Human, mouse, and rat samples have been validated with various ATAD3A antibodies

    • For liquid samples, both serum and plasma (particularly EDTA/citrate-treated) are suitable

    • Cell culture supernatants can also be analyzed using these antibodies

  • Storage Conditions:

    • Store antibodies at -20°C for long-term storage (up to one year)

    • For frequent use, short-term storage at 4°C (up to one month) is acceptable

    • Avoid repeated freeze-thaw cycles to maintain antibody integrity and performance

How can I optimize Western blot protocols when using biotin-conjugated ATAD3A antibodies?

Optimizing Western blot protocols for biotin-conjugated ATAD3A antibodies requires careful attention to several parameters:

  • Antibody Dilution Optimization:

    • Begin with manufacturer-recommended dilutions (typically 1:500-1:2000 for WB applications)

    • Perform a dilution series experiment to determine optimal signal-to-noise ratio for your specific samples

    • Consider the calculated molecular weight of ATAD3A (approximately 71 kDa) when evaluating bands

  • Blocking Strategy:

    • Use BSA-based blocking buffers (1-5%) to reduce background from endogenous biotin

    • Avoid milk-based blockers which contain biotin that can interfere with detection

    • Consider adding avidin/streptavidin blocking steps if background remains high

  • Detection System Selection:

    • Utilize streptavidin-HRP or streptavidin-conjugated fluorophores for detection

    • For increased sensitivity, consider using amplification systems such as tyramide signal amplification

  • Mitochondrial Enrichment:

    • Since ATAD3A is a mitochondrial protein, enriching mitochondrial fractions prior to Western blotting can improve signal strength

    • Document subcellular fractionation protocols carefully to ensure reproducibility

  • Controls:

    • Include positive controls from tissues/cells known to express ATAD3A

    • Consider using recombinant ATAD3A protein as a reference standard

What are the key considerations for designing co-immunoprecipitation experiments to study ATAD3A protein interactions?

Co-immunoprecipitation (Co-IP) experiments are valuable for investigating ATAD3A protein interactions, particularly in light of its known interactions with proteins like Drp1. Based on the research results, consider the following methodological approaches:

  • Antibody Selection:

    • Choose antibodies validated for immunoprecipitation applications

    • Consider using non-conjugated antibodies for the pull-down and biotin-conjugated antibodies for detection

    • Verify that the antibody epitope doesn't interfere with the protein interaction of interest

  • Protocol Design Based on Research Findings:

    • Research has identified increased Drp1-ATAD3A interactions in Huntington's disease models

    • Similar IP approaches can be used to study:

      • ATAD3A oligomerization states

      • Interactions with mitochondrial DNA nucleoids

      • Binding partners in the mitochondrial membrane

  • Experimental Controls:

    • Include IgG control immunoprecipitations to assess non-specific binding

    • Perform reciprocal IPs (e.g., IP with anti-Drp1 and blot for ATAD3A)

    • Consider including lysates from cells treated with factors that modify ATAD3A function, such as 3-nitropropionic acid (3-NP)

  • Buffer Composition:

    • Use mild detergents (0.5-1% NP-40, CHAPS, or digitonin) to preserve protein-protein interactions

    • Include protease inhibitors to prevent degradation

    • Consider phosphatase inhibitors if studying phosphorylation-dependent interactions

  • Validation Approaches:

    • Confirm interactions using in vitro binding assays with purified components

    • Use domain mapping with truncation mutants to identify specific interaction regions

How can I quantitatively measure ATAD3A protein levels in patient-derived samples?

For quantitative measurement of ATAD3A in patient-derived samples, ELISA-based approaches offer the most precise quantification. Based on the research data:

  • ELISA Method Selection:

    • Sandwich ELISA format provides high specificity and sensitivity for ATAD3A detection

    • The assay employs capture antibodies pre-coated on microwells and biotin-labeled detection antibodies

    • Streptavidin-HRP conjugate binds to the biotin-labeled antibodies for colorimetric detection

  • Sample Considerations:

    • Validated sample types include:

      • Human serum

      • Plasma (EDTA/citrate-treated)

      • Cell culture supernatants

      • Other biological fluids

  • Assay Performance Metrics:

    • Sensitivity: 0.061 ng/ml

    • Assay range: 0.156-10 ng/ml

    • Low cross-reactivity with related proteins

  • Protocol Workflow:

    • Sample addition to antibody-coated wells

    • Incubation with biotin-labeled detection antibody

    • Addition of Streptavidin-HRP

    • Development with TMB substrate

    • Measurement at 450nm

  • Data Analysis:

    • Generate standard curves using known concentrations of recombinant ATAD3A

    • Verify linearity in the working range

    • Calculate sample concentrations based on optical density values

How can ATAD3A antibodies be used to investigate its role in neurodegeneration pathways?

ATAD3A has been implicated in neurodegenerative disorders, particularly Huntington's disease (HD). Advanced research applications using ATAD3A antibodies can help elucidate its pathophysiological roles:

  • Interaction Studies in Disease Models:

    • Immunoprecipitation studies have revealed enhanced interaction between ATAD3A and Drp1 in multiple HD models:

      • HdhQ111 cells (compared to HdhQ7 control cells)

      • HD YAC128 and R6/2 mouse striatal protein lysates

      • HD patient fibroblasts

      • HD patient postmortem brain tissues

  • Protein Complex Analysis:

    • Investigation of ATAD3A oligomerization states using native gel electrophoresis

    • Domain mapping using truncated ATAD3A mutants (ΔN50, ΔCC, ΔN245) to identify interaction regions

    • Functional analysis of the coiled-coil (CC) domain of ATAD3A, which has been shown to bind to the GTPase domain of Drp1

  • Mitochondrial Morphology Correlation:

    • Combined immunofluorescence and high-resolution microscopy to correlate ATAD3A localization with:

      • Mitochondrial fragmentation patterns

      • Nucleoid distribution

      • Mitochondrial-ER contact sites

  • Pharmacological Manipulation:

    • Using 3-nitropropionic acid (3-NP), a neurotoxin that causes HD-like symptoms, to induce ATAD3A-Drp1 interactions

    • Monitoring changes in ATAD3A localization and interaction patterns following treatment with potential therapeutic compounds

  • Human Tissue Studies:

    • Immunohistochemical analysis of ATAD3A expression patterns in postmortem brain tissues from neurodegenerative disease patients

    • Correlation of ATAD3A levels/distribution with disease severity markers

What are the methodological challenges in studying ATAD3A involvement in mitochondrial DNA maintenance?

Investigating ATAD3A's role in mitochondrial DNA (mtDNA) maintenance presents several methodological challenges that researchers should address:

  • Distinguishing Direct vs. Indirect Effects:

    • ATAD3A may bind to mtDNA D-loops and contribute to nucleoid stability

    • Challenge: Separating direct DNA binding from effects mediated through protein-protein interactions

    • Solution: Combine ChIP-seq approaches with proximity labeling techniques like BioID or APEX to identify the complete interactome

  • Resolving Subcellular Localization:

    • ATAD3A spans both outer and inner mitochondrial membranes with different functional domains

    • Challenge: Precisely localizing different ATAD3A domains relative to mtDNA

    • Solution: Super-resolution microscopy (STORM/PALM) combined with specific domain antibodies

  • Functional Analysis of ATPase Activity:

    • ATAD3A contains an ATPase domain whose activity affects its function

    • Challenge: Distinguishing between ATPase-dependent and independent functions

    • Solution: Employ ATPase-dead mutants (e.g., Walker A/B mutations) and compare with wild-type protein

  • Temporal Dynamics of ATAD3A-mtDNA Interactions:

    • Challenge: Capturing dynamic interactions that may occur during specific cellular states

    • Solution: Live-cell imaging with fluorescently tagged ATAD3A combined with mtDNA labeling

  • Redundancy with Related Proteins:

    • ATAD3A belongs to a family that includes ATAD3B and ATAD3C

    • Challenge: Discriminating between isoform-specific functions

    • Solution: Use highly specific antibodies that don't cross-react with other family members, combined with isoform-specific knockdown/knockout approaches

How can antibody-based approaches be combined with genetic manipulation to study ATAD3A function in stress response pathways?

Combining antibody-based detection with genetic manipulation offers powerful insights into ATAD3A's role in cellular stress responses. Advanced research strategies include:

  • CRISPR/Cas9 Gene Editing Combined with Antibody Detection:

    • Generate domain-specific mutations in ATAD3A (targeting CC domains, ATPase domain, or membrane-spanning regions)

    • Use antibodies to assess changes in:

      • Protein stability and expression levels

      • Subcellular localization

      • Interaction partners

      • Post-translational modifications

  • Inducible Expression Systems:

    • Establish cell lines with doxycycline-inducible ATAD3A expression (wild-type or mutant variants)

    • Use antibodies to track temporal changes in ATAD3A distribution and function following induction

    • Monitor mitochondrial network reorganization in response to ATAD3A level changes

  • Stress Response Studies:

    • Apply specific stressors known to affect ATAD3A function:

      • ER stress inducers (to study ATAD3A's role in inhibiting EIF2AK3/PERK at mitochondria-ER contact sites)

      • mtDNA damage inducers (to study integrated stress response activation)

      • Viral infection models (to examine antiviral innate immunity roles)

    • Use antibodies to track changes in ATAD3A localization, complex formation, and post-translational modifications

  • Proximity Labeling Approaches:

    • Fuse ATAD3A with BioID or APEX2 enzymes

    • Identify proteins in close proximity to ATAD3A under different stress conditions

    • Verify interactions using co-immunoprecipitation with specific antibodies

  • High-Content Imaging:

    • Perform automated microscopy with multiple cellular markers alongside ATAD3A

    • Quantify changes in mitochondrial morphology, distribution, and ATAD3A colocalization patterns

    • Correlate phenotypic changes with biochemical measurements of stress response activation

How can I resolve high background issues when using biotin-conjugated ATAD3A antibodies?

High background is a common challenge when working with biotin-conjugated antibodies due to endogenous biotin in samples. Based on research protocols, consider these troubleshooting approaches:

  • Endogenous Biotin Blocking:

    • Pre-block samples with avidin/streptavidin followed by free biotin

    • Use commercial biotin blocking kits specifically designed for this purpose

    • For tissue sections, consider using biotin-free detection systems as alternatives

  • Buffer Optimization:

    • Use BSA instead of milk for blocking (milk contains biotin)

    • Add 0.1-0.3% Triton X-100 to reduce non-specific binding

    • Consider using specialized blocking reagents designed for biotin-streptavidin systems

  • Antibody Dilution Optimization:

    • Perform serial dilution tests to identify optimal concentration

    • For Western blots, recommended range is 1:500-1:2000

    • For IHC applications, recommended range is 1:100-1:400

  • Sample Preparation Considerations:

    • Ensure complete deparaffinization of FFPE tissues

    • Optimize antigen retrieval conditions (buffer composition, pH, temperature, duration)

    • Pre-clear lysates by centrifugation to remove aggregates

  • Detection System Adjustments:

    • Reduce incubation time with streptavidin-enzyme conjugate

    • Wash thoroughly between steps (minimum 3×5 minutes)

    • Consider diluting the streptavidin-enzyme conjugate further

What controls should be included when validating ATAD3A antibody specificity for novel applications?

Rigorous validation of ATAD3A antibody specificity is essential, particularly for novel applications. Include these controls:

  • Genetic Controls:

    • ATAD3A knockout/knockdown samples (siRNA, CRISPR/Cas9)

    • Overexpression systems with tagged ATAD3A constructs

    • Samples from cells expressing different levels of ATAD3A naturally

  • Peptide Competition Assays:

    • Pre-incubate antibody with the immunizing peptide/protein

    • Compare signal between blocked and unblocked antibody

    • A specific antibody will show significantly reduced signal when blocked with its cognate peptide

  • Cross-Reactivity Assessment:

    • Test against related proteins (ATAD3B, ATAD3C)

    • Check reactivity in samples from different species to confirm conservation of epitope recognition

    • Validated reactivity has been confirmed for human, mouse, and rat samples

  • Multiple Antibody Validation:

    • Compare results using antibodies targeting different epitopes of ATAD3A

    • Confirm similar patterns using monoclonal and polyclonal antibodies

    • Verify consistency between unconjugated and biotin-conjugated antibodies

  • Application-Specific Controls:

    • For IP: Include IgG control and input samples

    • For IHC/IF: Include isotype controls and secondary-only controls

    • For ELISA: Run standard curves and include spike recovery tests

How do storage conditions and handling procedures affect the performance of biotin-conjugated ATAD3A antibodies?

Proper storage and handling of biotin-conjugated antibodies is critical for maintaining optimal performance:

  • Storage Temperature Requirements:

    • Long-term storage: -20°C for up to one year

    • Short-term/frequent use: 4°C for up to one month

    • Avoid storing at room temperature for extended periods

  • Buffer Composition Effects:

    • Common storage buffer components include:

      • PBS with 0.02% sodium azide

      • 50% glycerol

      • pH 7.2

    • These components help maintain antibody stability and prevent microbial growth

  • Freeze-Thaw Considerations:

    • Minimize freeze-thaw cycles as they can damage antibody structure and biotin conjugation

    • Aliquot antibodies upon receipt to avoid repeated freezing/thawing

    • Allow antibodies to thaw completely at 4°C before use

  • Light Sensitivity:

    • Biotin conjugates may be somewhat light-sensitive

    • Store in amber vials or wrapped in foil

    • Minimize exposure to direct light during experimental procedures

  • Reconstitution Protocols:

    • Follow manufacturer-specific reconstitution guidelines

    • Use deionized water or recommended buffers

    • Allow complete reconstitution before use

    • Document reconstitution date and concentration

How can ATAD3A antibodies contribute to understanding mitochondrial-mediated antiviral immunity?

Recent research has identified ATAD3A as a participant in mitochondrial-mediated antiviral innate immunity . Antibody-based approaches can help elucidate these mechanisms:

  • Virus-Induced Changes in ATAD3A:

    • Track ATAD3A localization and expression changes during viral infection

    • Examine post-translational modifications of ATAD3A in response to viral components

    • Investigate ATAD3A interactions with known antiviral signaling proteins

  • Methodological Approaches:

    • Time-course immunofluorescence studies during viral infection

    • Co-immunoprecipitation of ATAD3A with pattern recognition receptors and signaling molecules

    • ChIP-seq to identify changes in ATAD3A-mtDNA interactions during infection

  • Multi-omics Integration:

    • Combine antibody-based proteomics with transcriptomics and metabolomics

    • Correlate ATAD3A complex formation with downstream antiviral gene expression

    • Map the complete ATAD3A interactome in infected versus uninfected cells

  • Functional Validation:

    • Use ATAD3A knockout/knockdown systems combined with viral infection models

    • Rescue experiments with wild-type versus mutant ATAD3A

    • Correlate ATAD3A levels/activity with viral replication efficiency

  • Therapeutic Targeting Potential:

    • Screen for compounds that modulate ATAD3A activity during infection

    • Use antibodies to evaluate drug effects on ATAD3A localization and function

    • Investigate whether pathogens directly target ATAD3A as an immune evasion strategy

What role does ATAD3A play in regulating the integrated stress response, and how can this be studied with current antibody tools?

ATAD3A has been identified as a regulator of the integrated stress response (ISR) through its involvement in mitochondrial DNA damage response and inhibition of PERK at mitochondria-ER contact sites . Advanced research approaches include:

  • Stress Response Pathway Mapping:

    • Track ATAD3A localization during various stress conditions (ER stress, mtDNA damage)

    • Examine co-localization with:

      • EIF2AK3/PERK at mitochondria-ER contact sites

      • mtDNA nucleoids during damage response

      • Other ISR components

  • Mechanistic Investigation:

    • Study ATAD3A's ATPase-independent inhibition of EIF2AK3/PERK

    • Map domains responsible for this interaction

    • Investigate how ATAD3A promotes signaling between damaged mtDNA genomes and the mitochondrial membrane

  • Methodological Approaches:

    • Proximity ligation assay (PLA) to detect ATAD3A-PERK interactions in situ

    • FRET/BRET assays to measure dynamic interactions during stress responses

    • Antibody-based proteomics to identify stress-induced changes in the ATAD3A interactome

  • Functional Consequences:

    • Measure ISR activation markers in cells with modified ATAD3A levels

    • Correlate ATAD3A distribution with mitochondrial translation rates during stress

    • Examine the impact of ATAD3A mutations on cellular resilience to different stressors

  • Therapeutic Implications:

    • Screen compounds that modulate ATAD3A's role in stress response regulation

    • Investigate disease contexts where ATAD3A-mediated stress response regulation is dysregulated

    • Develop tools to monitor ATAD3A activity as a biomarker of mitochondrial stress

How can advanced microscopy techniques be combined with ATAD3A immunostaining to reveal its role in mitochondrial network organization?

Combining advanced microscopy with ATAD3A immunostaining offers powerful insights into its function in mitochondrial dynamics:

  • Super-Resolution Microscopy Applications:

    • STED, STORM, or PALM microscopy to resolve:

      • ATAD3A distribution within mitochondrial subcompartments

      • Co-localization with nucleoids at nanometer resolution

      • Organization at mitochondria-ER contact sites

  • Live-Cell Imaging Approaches:

    • Correlative light and electron microscopy (CLEM) to connect ATAD3A localization with ultrastructural features

    • Lattice light-sheet microscopy for 3D visualization of ATAD3A dynamics during mitochondrial remodeling

    • FRAP (fluorescence recovery after photobleaching) to measure ATAD3A mobility within mitochondria

  • Multi-Color Imaging Strategies:

    • Simultaneous visualization of:

      • ATAD3A (using biotin-conjugated primary antibodies)

      • Mitochondrial markers (TOMM20, MitoTracker)

      • Nucleoid markers (TFAM, mtDNA)

      • Interaction partners (Drp1, PERK)

  • Image Analysis Techniques:

    • Quantitative co-localization analysis

    • Mitochondrial morphology quantification (length, branching, fragmentation)

    • Machine learning algorithms to classify ATAD3A distribution patterns

  • Experimental Design Considerations:

    • Compare ATAD3A distribution in different cell types with varying mitochondrial network organizations

    • Track changes during key cellular processes (cell division, differentiation, stress responses)

    • Correlate ATAD3A patterns with functional readouts (membrane potential, ATP production)

How do various immunodetection methods compare for ATAD3A analysis in different sample types?

Different detection methods offer distinct advantages for ATAD3A analysis. This comparative assessment can guide method selection:

Detection MethodSensitivityQuantificationSpatial InformationSample RequirementsKey Applications
Western BlotModerateSemi-quantitativeNoneCell/tissue lysatesExpression levels, molecular weight verification
IHC-PModerateSemi-quantitativeTissue-levelFFPE tissuesLocalization in tissue context, expression patterns
ImmunofluorescenceHighSemi-quantitativeSubcellularFixed cells/tissuesCo-localization studies, mitochondrial distribution
ELISAVery HighFully quantitativeNoneLiquid samplesAbsolute quantification in biological fluids
Flow CytometryHighQuantitativeNoneSingle-cell suspensionsCell-to-cell variability, population analysis
ImmunoprecipitationVariableQualitativeNoneCell/tissue lysatesProtein-protein interactions, complex formation
  • Western Blot Considerations:

    • Optimal for comparing expression levels across samples

    • Can detect post-translational modifications with specific antibodies

    • Recommended dilutions: 1:500-1:2000

  • IHC-P Application Notes:

    • Best for examining ATAD3A distribution in tissue context

    • Can reveal pathological changes in disease states

    • Recommended dilutions: 1:100-1:400

  • ELISA Method Advantages:

    • Highest sensitivity (0.061 ng/ml) and quantitative precision

    • Ideal for longitudinal studies and biomarker applications

    • Validated for serum, plasma, and biological fluids

  • Method Selection Guidelines:

    • For protein interactions: Immunoprecipitation or proximity ligation assay

    • For expression quantification: Western blot or ELISA

    • For spatial distribution: IHC or immunofluorescence

    • For heterogeneity analysis: Flow cytometry or single-cell imaging

What are the critical quality control parameters for validating experimental results with ATAD3A antibodies?

Ensuring experimental validity requires rigorous quality control when using ATAD3A antibodies:

  • Antibody Validation Criteria:

    • Specificity verification:

      • Single band at expected molecular weight (~71 kDa)

      • Signal reduction/elimination in knockout/knockdown models

      • Peptide competition assays

  • Experimental Controls:

    • Positive controls: Samples known to express ATAD3A (specific cell lines, tissues)

    • Negative controls:

      • Primary antibody omission

      • Isotype controls

      • Samples with ATAD3A knockdown/knockout

  • Technical Quality Parameters:

    • Signal-to-noise ratio optimization

    • Reproducibility across replicates (CV < 15%)

    • Linearity of signal in quantitative applications

    • Batch effects monitoring and normalization

  • Reporting Standards:

    • Complete antibody information (clone, catalog number, lot)

    • Detailed methodological documentation

    • Inclusion of representative images including controls

    • Transparent data processing and statistical analysis

  • Application-Specific Quality Metrics:

    • For Western blot: Clean bands at expected MW, linear dynamic range verification

    • For IHC/IF: Specific subcellular pattern consistent with mitochondrial localization

    • For ELISA: Standard curve performance, spike recovery (80-120%)

    • For IP: Specific enrichment compared to IgG control

How might new ATAD3A antibody development enhance our understanding of its role in disease pathogenesis?

Development of next-generation ATAD3A antibodies could significantly advance disease-related research:

  • Domain-Specific Antibodies:

    • Generate antibodies targeting specific functional domains:

      • N-terminal domain (mitochondrial outer membrane)

      • Coiled-coil domains (protein interaction)

      • ATPase domain (enzymatic function)

      • C-terminal domain (inner membrane/matrix)

    • These would allow mapping of domain-specific functions in disease contexts

  • Post-Translational Modification-Specific Antibodies:

    • Develop antibodies recognizing specific phosphorylation, acetylation, or ubiquitination sites

    • Study how these modifications change in disease states like Huntington's disease

    • Link modifications to altered ATAD3A interactions with partners like Drp1

  • Conformational State-Specific Antibodies:

    • Generate antibodies that selectively recognize ATP-bound versus ADP-bound states

    • Develop tools to detect oligomeric versus monomeric ATAD3A

    • Create antibodies that specifically detect ATAD3A at mitochondria-ER contact sites

  • Advanced Labeling Strategies:

    • Directly conjugated fluorescent antibodies for multi-color live imaging

    • Nanobody or Fab fragment derivatives for improved tissue penetration

    • Antibody-drug conjugates for targeted mitochondrial delivery

  • Disease Applications:

    • Develop diagnostic antibodies for detecting pathological ATAD3A alterations in:

      • Neurodegenerative diseases (HD, where ATAD3A-Drp1 interaction is enhanced)

      • Cancers (where ATAD3A may contribute to metabolic reprogramming)

      • Mitochondrial disorders (where ATAD3A function in nucleoid maintenance is compromised)

What therapeutic implications arise from understanding ATAD3A function and regulation?

Research into ATAD3A has revealed several potential therapeutic avenues:

  • Targeting ATAD3A-Drp1 Interaction:

    • The enhanced interaction between ATAD3A and Drp1 in Huntington's disease suggests a therapeutic opportunity

    • Developing small molecules to disrupt this pathological interaction could mitigate mitochondrial dysfunction

    • Peptide-based inhibitors mimicking the interaction domains could serve as lead compounds

  • Modulating ATAD3A's Role in Stress Responses:

    • ATAD3A inhibits EIF2AK3/PERK at mitochondria-ER contact sites, providing protection during ER stress

    • Enhancing this protective function could be beneficial in diseases with chronic ER stress

    • Conversely, temporarily inhibiting this function might enhance integrated stress response activation when beneficial

  • Targeting ATAD3A ATPase Activity:

    • Small molecules modulating ATAD3A's ATPase function could alter its roles in mitochondrial organization

    • ATPase inhibitors could be used to dissect ATPase-dependent versus independent functions

    • Structure-based drug design could target specific conformational states

  • Gene Therapy Approaches:

    • For conditions with ATAD3A haploinsufficiency, gene replacement therapy

    • For gain-of-function mutations, RNA interference or antisense oligonucleotides

    • CRISPR-based approaches for correcting specific mutations

  • Biomarker Development:

    • Monitoring ATAD3A levels, modifications, or complex formation as biomarkers for:

      • Disease progression

      • Treatment response

      • Mitochondrial stress status

How can multi-omics approaches incorporating ATAD3A antibody-based techniques advance mitochondrial research?

Integrating antibody-based ATAD3A analysis with multi-omics approaches offers comprehensive insights:

  • Integrated Proteomics Approaches:

    • Antibody-based pull-downs coupled with mass spectrometry to identify:

      • ATAD3A interactome changes under different conditions

      • Post-translational modifications and their functional significance

      • Alterations in complex composition in disease states

  • Spatial Multi-omics:

    • Combining in situ ATAD3A detection with:

      • Spatial transcriptomics to correlate ATAD3A distribution with gene expression patterns

      • Imaging mass spectrometry for metabolite distribution

      • DNA-FISH for nucleoid colocalization

  • Temporal Dynamic Analysis:

    • Time-resolved studies tracking ATAD3A:

      • Changes during mitochondrial stress responses

      • Alterations during cell cycle progression

      • Modifications during cellular differentiation or disease progression

  • Single-Cell Resolution Approaches:

    • ATAD3A antibody-based flow cytometry combined with:

      • Single-cell RNA-seq

      • Single-cell proteomics

      • Functional mitochondrial measurements

  • Systems Biology Integration:

    • Network analysis incorporating:

      • ATAD3A interaction data from antibody-based studies

      • Transcriptional changes associated with ATAD3A modulation

      • Metabolic alterations linked to ATAD3A function

      • Mitochondrial morphological parameters

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