Os06g0701100 Antibody

What is Os06g0701100 and what cellular functions does it serve in rice?

Os06g0701100 encodes a protein identified as eIF4A, a member of the DEAD-box RNA helicase family that functions as a translation initiation factor. In rice, this protein plays crucial roles in:

• Unwinding RNA secondary structures during translation initiation

• Regulating antiviral autophagy pathways through interaction with ATG5

• Mediating responses to certain viral infections, particularly rice stripe virus (RSV)

Research indicates that eIF4A acts as a negative regulator of autophagy in both Nicotiana benthamiana and rice by inhibiting the function of ATG5, a key component of the autophagy machinery .

What are the validated applications for the Os06g0701100 antibody?

According to the technical specifications, the Os06g0701100 antibody (CSB-PA336068XA01OFG) has been validated for:

• ELISA (Enzyme-Linked Immunosorbent Assay)

• Western Blot (WB) for protein identification

The antibody has been affinity-purified and is supplied in liquid form in a buffer containing 50% glycerol, 0.01M PBS (pH 7.4), and 0.03% Proclin 300 as a preservative .

What are the recommended storage conditions for maintaining Os06g0701100 antibody activity?

For optimal preservation of activity:

• Store the antibody at -20°C or -80°C upon receipt

• Avoid repeated freeze-thaw cycles that can damage antibody structure

• Working aliquots can be prepared to minimize freeze-thaw cycles

• The antibody is supplied in a storage buffer containing 50% glycerol, 0.01M PBS (pH 7.4), and 0.03% Proclin 300 to maintain stability

Proper storage is crucial for maintaining specificity and sensitivity in experimental applications.

What are the optimal protocols for Western blot analysis using Os06g0701100 antibody?

For optimal Western blot results with Os06g0701100 antibody:

Sample Preparation:

• Extract total protein from rice tissues using an appropriate lysis buffer containing protease inhibitors

• Quantify protein using Bradford or BCA assay

• Load 20-50 μg of total protein per lane

Electrophoresis and Transfer:

• Separate proteins on 10-12% SDS-PAGE gel

• Transfer to PVDF or nitrocellulose membrane (0.45 μm pore size preferred)

• Verify transfer efficiency with Ponceau S staining

Immunoblotting:

• Block membrane with 5% non-fat dry milk in TBST for 1 hour at room temperature

• Incubate with Os06g0701100 antibody (recommended dilution: 1:1000-1:2000) overnight at 4°C

• Wash 3-5 times with TBST, 5 minutes each

• Incubate with HRP-conjugated secondary anti-rabbit antibody (1:5000-1:10000) for 1 hour at room temperature

• Wash thoroughly and develop using ECL substrate

Controls:

• Positive control: Rice tissue lysate expressing Os06g0701100

• Negative control: Lysate from non-plant organisms or plants with low homology to rice eIF4A

How can researchers optimize immunoprecipitation experiments with Os06g0701100 antibody?

For successful immunoprecipitation of Os06g0701100/eIF4A:

Pre-clearing Step:

• Incubate 500-1000 μg of protein lysate with protein A/G beads for 1 hour at 4°C

• Separate beads by centrifugation and collect pre-cleared lysate

Immunoprecipitation:

• Add 2-5 μg of Os06g0701100 antibody to pre-cleared lysate

• Incubate overnight at 4°C with gentle rotation

• Add 30-50 μl of protein A/G beads and incubate for 2-4 hours at 4°C

• Wash beads 4-5 times with IP buffer containing reduced detergent

• Elute bound proteins with 2X SDS sample buffer and heat at 95°C for 5 minutes

Analysis:

• Analyze by Western blot using Os06g0701100 antibody or antibodies against potential interacting proteins

• For protein interaction studies, consider crosslinking before lysis to preserve transient interactions

What approaches should be used for visualizing Os06g0701100 localization in rice tissues?

While the antibody is not specifically validated for immunohistochemistry, researchers have developed protocols for cellular localization studies:

Immunofluorescence in Fixed Tissues:

• Fix tissue samples in 4% paraformaldehyde

• Embed in paraffin or prepare cryosections (10-20 μm)

• Perform antigen retrieval using citrate buffer (pH 6.0)

• Block with 5% BSA and 0.3% Triton X-100

• Incubate with Os06g0701100 antibody (1:100-1:500) overnight at 4°C

• Wash thoroughly and incubate with fluorophore-conjugated secondary antibody

• Counterstain nuclei with DAPI

• Mount and visualize using confocal microscopy

Controls:

• Secondary antibody only control

• Preimmune serum control

• Competition with purified antigen

How can Os06g0701100 antibody be utilized to study plant-virus interactions?

Os06g0701100/eIF4A plays a critical role in antiviral responses in rice:

Studying RSV-Rice Interactions:

• Monitor eIF4A levels during different stages of RSV infection using Western blot

• Examine eIF4A localization changes during infection using immunofluorescence

• Investigate eIF4A interaction with viral proteins using co-immunoprecipitation

• Study the relationship between eIF4A silencing and autophagy activation

Research shows that RSV produces siRNA-4A from its RNA4 genome segment, which targets eIF4A mRNA for degradation. This silencing of eIF4A relieves its inhibition of ATG5, inducing autophagy that restricts viral infection .

Experimental Approach:

• Infect rice plants with RSV

• Collect samples at different timepoints post-infection

• Analyze eIF4A protein levels by Western blot

• Perform co-IP to detect ATG5-eIF4A interaction changes

• Quantify autophagy markers like ATG8 lipidation

• Correlate findings with viral load measurements

What techniques can be used to study the interaction between Os06g0701100 (eIF4A) and ATG5?

To investigate the eIF4A-ATG5 interaction:

Co-immunoprecipitation:

• Immunoprecipitate eIF4A using Os06g0701100 antibody

• Probe for ATG5 in the immunoprecipitates

• Perform reciprocal IP with ATG5 antibody and probe for eIF4A

Proximity Ligation Assay (PLA):

• Fix plant cells/tissues

• Incubate with Os06g0701100 antibody and anti-ATG5 antibody

• Apply PLA probes and perform ligation and amplification

• Visualize interaction sites as fluorescent dots

Bimolecular Fluorescence Complementation (BiFC):

• Create fusion constructs of eIF4A and ATG5 with split fluorescent protein fragments

• Express in plant cells

• Monitor reconstitution of fluorescence when proteins interact

How does the function of Os06g0701100 (eIF4A) in rice compare to its orthologs in other plant species?

Comparative analysis shows both conservation and divergence:

Functional Conservation:

• eIF4A serves as a translation initiation factor across plant species

• Its role in RNA unwinding during translation is evolutionarily conserved

• Interaction with components of the autophagy machinery appears consistent between rice and N. benthamiana

Species-Specific Differences:

• Differential responses to viral infections

• Variable regulation under stress conditions

• Different interaction partners in various plant species

Research Approach:

• Perform sequence alignment of eIF4A proteins from different species

• Test cross-reactivity of Os06g0701100 antibody with orthologs

• Compare biochemical properties and interactomes

• Analyze functional complementation in knockout/knockdown lines

What are the common issues with Western blot detection using Os06g0701100 antibody and how can they be resolved?

Issue: Weak or No Signal

• Solution 1: Increase antibody concentration (try 1:500 instead of 1:1000)

• Solution 2: Extend primary antibody incubation time (overnight at 4°C)

• Solution 3: Use enhanced detection systems (more sensitive ECL substrates)

• Solution 4: Optimize protein extraction to preserve target protein integrity

Issue: High Background

• Solution 1: Increase blocking time or blocking agent concentration

• Solution 2: Use more stringent washing conditions (more washes, higher salt concentration)

• Solution 3: Decrease antibody concentration

• Solution 4: Ensure membrane is never allowed to dry during procedure

Issue: Multiple Bands

• Solution 1: Increase gel percentage for better separation

• Solution 2: Use freshly prepared samples with protease inhibitors

• Solution 3: Perform peptide competition assay to identify specific bands

• Solution 4: Consider that multiple bands might represent isoforms, modified proteins, or degradation products

How can researchers verify the specificity of Os06g0701100 antibody in their experimental system?

To confirm antibody specificity:

Peptide Competition Assay:

• Pre-incubate antibody with excess immunizing peptide

• Use this mixture in parallel with untreated antibody

• Specific bands should be significantly reduced or eliminated

Genetic Controls:

• Test on samples with known overexpression of target

• Test on knockdown/knockout samples (if available)

• Compare band patterns with predicted molecular weight

Mass Spectrometry Validation:

• Perform immunoprecipitation with Os06g0701100 antibody

• Analyze precipitated proteins by mass spectrometry

• Confirm presence of eIF4A peptides in the sample

Cross-Reactivity Testing:

• Test antibody on related plant species with varying degrees of sequence homology

• Compare signal intensities and patterns

What controls should be included when studying Os06g0701100 in rice-virus interaction studies?

Essential Controls for Rice-Virus Studies:

For Western Blot Analysis:

• Uninfected rice samples (negative control)

• Samples from plants at different infection stages

• Loading control (housekeeping protein like actin or GAPDH)

• Recombinant Os06g0701100 protein (positive control)

For Co-localization Studies:

• Single antibody controls to verify filter settings

• Secondary antibody only controls

• Uninfected tissue controls

• Time-course samples to track protein dynamics

For Gene Silencing Studies:

• Empty vector controls

• Non-targeting RNA controls

• qRT-PCR verification of silencing efficiency

• Phenotypic rescue experiments with resistant constructs

How might Os06g0701100 antibody contribute to understanding broader translation regulation mechanisms in plants?

Os06g0701100 antibody can facilitate research into:

Translation Control During Stress:

• Monitor eIF4A levels and modifications during abiotic stresses

• Identify stress-specific interaction partners using IP-MS

• Determine tissue-specific regulation of translation

Developmental Regulation:

• Track eIF4A expression patterns during different developmental stages

• Correlate with tissue-specific translation rates

• Investigate role in developmental transitions

Evolutionary Perspectives:

• Compare eIF4A function across plant lineages

• Study conservation of regulatory mechanisms

• Explore diversification of translation control systems

What emerging technologies could enhance research utilizing Os06g0701100 antibody?

Innovative Methodologies:

Proximity-Dependent Biotin Identification (BioID):

• Create fusion of eIF4A with biotin ligase

• Identify proteins in close proximity in vivo

• Map dynamic interaction network changes during viral infection

CRISPR-Based Approaches:

• Generate epitope-tagged endogenous eIF4A for improved detection

• Create conditional knockout systems to study function

• Perform base editing to introduce specific mutations

Advanced Imaging:

• Super-resolution microscopy for precise localization

• Live-cell imaging with tagged proteins to track dynamics

• Correlative light and electron microscopy to study ultrastructural context

Single-Cell Analysis:

• Investigate cell-type specific roles of eIF4A

• Study heterogeneity in antiviral responses

• Combine with spatial transcriptomics

What are the limitations of current Os06g0701100 antibody technology and how might they be addressed?

Current Limitations:

Cross-Reactivity Challenges:

• The polyclonal nature may result in some non-specific binding

• Potential cross-reactivity with homologous proteins in other species

• Solution: Develop monoclonal antibodies with higher specificity

Application Restrictions:

• Limited validation for certain applications (e.g., IHC)

• Variable lot-to-lot performance

• Solution: Expand validation across multiple applications and lots

Detection Sensitivity:

• May not detect low expression levels in certain tissues

• Limited sensitivity for post-translational modifications

• Solution: Develop enrichment strategies or more sensitive detection methods

Technical Solutions:

• Generation of monoclonal antibodies targeting unique epitopes

• Development of modification-specific antibodies

• Creation of nanobodies for improved tissue penetration and resolution

• Implementation of proximity ligation assays for improved sensitivity