GEP7 Antibody

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Description

GEP7 Gene Identification and Function

The GEP7 gene (Systematic Name: YGR019W) in S. cerevisiae encodes a protein involved in GPI anchor biosynthesis, a critical post-translational modification process for membrane protein attachment. Key features include:

  • Molecular Function: GPI-anchor transamidase complex subunit

  • Biological Process: Integral component of the ER membrane; required for GPI anchor synthesis

  • Cellular Localization: Endoplasmic reticulum membrane (predicted)

Sequence Characteristics (from SGD):

PropertyValue
Protein Length257 amino acids
Molecular Weight~29.5 kDa
Isoelectric Point (pI)9.3

Research Context for Antibody-Related Terms

While no "GEP7 Antibody" exists, the search results highlight methodologies for antibody development that could theoretically apply to hypothetical GEP7-targeting antibodies:

Antibody Development Techniques

  • Phage Display Panning: Used to select scFv phage clones against antigens like TIM-3 and TGF-β, achieving hit rates of 22–95% in ELISA screening .

  • Epitope Mapping: Linear epitopes (e.g., RRAG in PRV gE glycoprotein) identified using truncated constructs and western blotting .

  • Fc Engineering: Modifications such as aglycosylation (e.g., N297A in eptinezumab) to reduce effector functions .

Potential Confusion with Similar Terms

The term "GEP7" might be conflated with:

  • gE Glycoprotein: A herpesvirus antigen (e.g., PRV gE) targeted by monoclonal antibodies like 1H5 .

  • Fc Receptor Systems: HSV-1 gE-gI mediates antibody bipolar bridging to evade immune responses .

Antibody Therapeutic Landscape

Relevant FDA-approved antibodies from the search results include:

Antibody NameTarget(s)FormatIndicationYear Approved
ElranatamabBCMA, CD3Bispecific IgG2Multiple myeloma2023
EvinacumabANGPTL3Human IgG4Familial hypercholesterolemia2021
EpcoritamabCD20, CD3Bispecific IgG1Diffuse large B-cell lymphoma2023

Product Specs

Buffer
Preservative: 0.03% Proclin 300
Constituents: 50% Glycerol, 0.01M Phosphate Buffered Saline (PBS), pH 7.4
Form
Liquid
Lead Time
Made-to-order (14-16 weeks)
Synonyms
GEP7; AWRI1631_71930; Genetic interactor of prohibitin 7, mitochondrial
Target Names
GEP7
Uniprot No.

Target Background

Function
GEP7 Antibody plays a crucial role in respiratory growth and is essential for cell survival when prohibitins or GEM1 are absent.
Protein Families
GEP7 family
Subcellular Location
Mitochondrion membrane; Single-pass membrane protein.

Q&A

What detection methods are most effective for GEP7 antibody in immunoassays?

GEP7 antibody detection can be effectively accomplished through several methodological approaches, with peptide-based ELISA representing one of the most sensitive and specific options. Based on comparative studies of genotype-specific antibody responses, ELISA methods can achieve detection sensitivity of 60-80% for primary antibody responses . For optimal results, researchers should consider:

  • Using peptide-based ELISA designs that target unique epitopes specific to GEP7

  • Implementing appropriate positive and negative controls to establish assay specificity

  • Establishing baseline measurements to account for non-specific binding

  • Validating results using complementary detection methods such as Western blotting

When designing your immunoassay protocol, sensitivity and specificity must be carefully balanced. For example, in studies of genotype-specific IgG responses to viral glycoproteins, peptide-based ELISAs demonstrated the ability to detect primary immune responses in approximately 73% of subjects infected with specific viral genotypes . Similar sensitivity can be expected when optimizing detection parameters for GEP7 antibody.

What are the optimal storage conditions for maintaining GEP7 antibody stability?

Long-term stability of GEP7 antibody requires careful attention to storage conditions to preserve structural integrity and functional activity. The recommended approach includes:

  • Storage at -80°C for long-term preservation (>6 months)

  • Storage at -20°C for medium-term use (1-6 months)

  • Storage at 4°C only for short-term applications (1-2 weeks)

  • Avoiding repeated freeze-thaw cycles (limit to <5 cycles)

  • Addition of stabilizing proteins (0.1-1% BSA) or glycerol (30-50%) to prevent denaturation

Temperature fluctuations represent the most significant risk factor for antibody degradation. Monitoring thermal stability through differential scanning fluorimetry (DSF) can help establish optimal storage buffers that maximize antibody half-life . For research applications requiring prolonged GEP7 antibody usage, aliquoting into single-use volumes is strongly recommended to minimize potential degradation from repeated handling.

How can GEP7 antibody be optimized for immunoprecipitation experiments?

Successful immunoprecipitation (IP) with GEP7 antibody requires methodological optimization across multiple parameters. Based on demonstrated IP protocols for similar research antibodies, researchers should:

  • Determine optimal antibody:target ratio through titration experiments

  • Pre-clear lysates with appropriate control beads to reduce non-specific binding

  • Cross-link antibody to solid support when necessary to prevent antibody leaching

  • Include appropriate detergents in binding buffers to maintain protein solubility while preserving interactions

  • Validate IP efficiency through comparative analysis with known positive controls

When optimizing IP conditions, researchers have successfully employed various solid supports, including protein A/G beads and magnetic beads conjugated with secondary antibodies. For example, newly developed antibodies against glucocerebrosidase demonstrated strong immunoprecipitation capability when validated using appropriate controls . Similar validation approaches should be implemented for GEP7 antibody to confirm specificity and efficiency.

What controls are essential when using GEP7 antibody in immunofluorescence applications?

Immunofluorescence experiments with GEP7 antibody require rigorous controls to ensure result validity and reproducibility. Essential controls include:

  • Negative controls using cells known to lack the target antigen

  • Positive controls using cells with confirmed target expression

  • Secondary antibody-only controls to assess non-specific binding

  • Isotype controls to evaluate potential Fc-mediated interactions

  • Peptide competition assays to verify epitope specificity

The validation strategy employed for antibodies against glucocerebrosidase provides an exemplary model, where specificity was confirmed using human cells deficient in the target protein . This approach effectively discriminates between specific signal and background noise. Researchers working with GEP7 antibody should implement similarly stringent validation controls tailored to their specific experimental system.

How can computational approaches enhance GEP7 antibody design and specificity?

Computational methods have revolutionized antibody engineering, offering powerful approaches to optimize GEP7 antibody properties. Current computational strategies include:

Computational ApproachApplicationExpected Success RateResource Requirements
Inverse Folding Models (AbMPNN)Generate new sequences maintaining structural features~54% binding retentionHigh computational resources
Observed Antibody Space (OAS)Identify candidates within edit distance from known bindersVaries by targetModerate computational resources
RFDiffusionAb-Ag complex prediction with epitope constraints~30% with DockQ score >0.49128 A100 GPUs (30 days training)
GearBindPredict mutation effects on Ab-Ag complexesImprovement over baseline methodsModerate computational resources

When optimizing GEP7 antibody through computational approaches, researchers should consider a multi-model approach to mitigate the limitations of individual methods. Recent benchmarking studies indicate that structural information-based approaches outperform purely sequence-based methods for predicting antibody properties .

What strategies exist for developing agonist versions of GEP7 antibody?

Development of agonist antibodies represents an advanced research application that requires specific engineering approaches. Based on recent advances in agonist antibody discovery, researchers can employ several strategies:

  • Function-based screening methodologies:

    • High-throughput function-based screening in mammalian reporter cells

    • Activity-based sorting with intervening culture periods

    • Single-cell isolation and expansion of positive clones

    • RT-PCR recovery and sequencing of lead antibody genes

  • Biepitopic antibody engineering:

    • Generation of bispecific antibodies targeting non-overlapping epitopes

    • Evaluation of synergistic combinations through systematic pairing

    • Competition analysis to determine binding sites relative to natural ligands

  • Fc engineering approaches:

    • Introduction of mutations that facilitate hexamerization (e.g., T437R, K248E)

    • Isotype selection to influence molecular conformation and geometry

    • Exploration of IgG2 h2B isoform for enhanced receptor clustering

How can GEP7 antibody be employed in genotype-specific response studies?

GEP7 antibody can be valuable for investigating genotype-specific immune responses, particularly when studying viral infections or genetic variations. The methodological approach would include:

  • Strain/genotype determination:

    • Utilize real-time PCR and whole genome sequencing to identify specific genotypes

    • Establish genotype-specific reference panels

    • Correlate genotypes with clinical or experimental phenotypes

  • Antibody response profiling:

    • Develop peptide-based ELISAs targeting genotype-specific epitopes

    • Measure IgG responses to different genotypes

    • Compare primary versus non-primary immune responses

  • Cross-reactivity assessment:

    • Evaluate genotype-specific versus cross-reactive antibody responses

    • Quantify percentage of subjects developing genotype-specific responses

    • Identify potential epitopes mediating cross-protection

Research on human cytomegalovirus (HCMV) glycoproteins has demonstrated that peptide-based ELISA can detect genotype-specific IgG responses in 63-73% of subjects with primary infection by specific viral genotypes . This approach provides a methodological framework that can be adapted for GEP7 antibody applications in genotype-specific studies.

What approaches are recommended for addressing cross-reactivity issues with GEP7 antibody?

Cross-reactivity represents a significant challenge in antibody-based research. Researchers encountering GEP7 antibody cross-reactivity should implement a systematic troubleshooting approach:

  • Cross-reactivity characterization:

    • Perform Western blot analysis against tissue/cell panels

    • Conduct epitope mapping to identify potential cross-reactive regions

    • Analyze sequence homology between intended target and potential cross-reactants

  • Validation strategies:

    • Use knockout or knockdown models lacking the target protein

    • Employ peptide competition assays with specific and non-specific peptides

    • Implement parallel detection with alternative antibodies targeting different epitopes

  • Optimization methods:

    • Increase washing stringency in immunoassays

    • Adjust antibody concentration to minimize non-specific binding

    • Pre-adsorb antibody with known cross-reactive proteins

Studies of antibodies against lysosomal hydrolases have demonstrated the importance of validation using target-deficient cells, which successfully confirmed specificity for immunostaining applications . Similar validation approaches should be implemented for GEP7 antibody to address potential cross-reactivity issues.

How can researchers optimize GEP7 antibody dilution for various experimental applications?

Determining optimal antibody dilution represents a critical step for achieving reproducible results. The recommended optimization strategy includes:

  • Systematic titration:

    • Perform serial dilutions across a wide concentration range

    • Evaluate signal-to-noise ratio at each dilution

    • Construct a titration curve to identify the optimal working concentration

  • Application-specific considerations:

    • Western blot: Typically higher concentrations (1:500-1:2000) required

    • ELISA: Medium concentrations (1:1000-1:5000) often optimal

    • Immunofluorescence: Lower concentrations (1:200-1:1000) frequently sufficient

    • Flow cytometry: Variable (1:50-1:500) depending on target abundance

  • Optimization parameters:

    • Incubation time (1 hour to overnight)

    • Incubation temperature (4°C, room temperature, 37°C)

    • Blocking agent compatibility (BSA, casein, normal serum)

When establishing optimal dilutions, researchers should consider that antibody performance often varies between applications. An antibody may work effectively for immunofluorescence but poorly for Western blotting, as observed with antibodies against glucocerebrosidase that demonstrated strong capability for immunostaining but could not detect endogenous protein levels via immunoblot .

What novel methodologies are being developed for enhancing GEP7 antibody functionality?

The antibody engineering field continues to advance rapidly, with several emerging technologies applicable to enhancing GEP7 antibody functionality:

  • Microdroplet-based screening systems:

    • Co-encapsulation of B cells with reporter cells in agarose microdroplets

    • Phage-producing bacteria co-encapsulated with mammalian reporter cells

    • FACS-based screening of microdroplet ecosystems

  • Fc engineering for enhanced functionality:

    • Mutations facilitating hexamerization for improved receptor clustering

    • Isotype optimization for enhanced agonist activity

    • Fc-Fc interaction engineering for Fc receptor-independent effects

  • AI-driven antibody optimization:

    • Language model-based sequence generation

    • Structure-based antibody design

    • Affinity maturation through computational prediction

Recent developments in these areas show significant promise. For example, studies have shown that introducing specific Fc mutations (T437R, K248E) can facilitate hexamerization of antibody Fc regions when bound to their target, promoting receptor clustering and enhancing agonist activity by approximately 30% compared to natural ligands . Similarly, AI-based approaches have demonstrated a 54% success rate in generating binding antibodies that maintain affinity against escape mutations .

How can researchers validate GEP7 antibody for specialized applications?

Validation of GEP7 antibody for specialized applications requires methodological approaches tailored to the specific application:

  • AlphaLISA development:

    • Optimization of donor and acceptor bead conjugation

    • Determination of optimal antibody-to-bead ratios

    • Calibration against known standards

    • Validation using samples with varying target concentrations

  • High-throughput screening applications:

    • Assessment of antibody stability under screening conditions

    • Determination of Z'-factor to evaluate assay robustness

    • Implementation of positive and negative controls at defined intervals

    • Evaluation of antibody batch-to-batch consistency

  • In vivo imaging applications:

    • Pharmacokinetic profiling of labeled antibody

    • Biodistribution analysis in relevant animal models

    • Specificity confirmation through competition studies

    • Signal-to-background optimization

When developing specialized applications, researchers should follow validation strategies similar to those employed for antibodies against glucocerebrosidase, where specific controls confirmed antibody functionality in immunoprecipitation and AlphaLISA assays .

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