TIFY11E Antibody

What is TIFY11E and why is it significant in plant research?

TIFY11E belongs to the plant-specific TIFY transcription factor (TF) family, which plays crucial roles in cross-talk between Jasmonic Acid and other phytohormone signaling pathways, including gibberellins, salicylic acid, abscisic acid, auxin, and ethylene . In wheat, three genes (TaTIFY7, TaTIFY15, and TaTIFY23) have been characterized as belonging to the TIFY11E subfamily . These genes have been identified as salt and dehydration stress responsive genes in rice, making them valuable targets for studying plant stress responses and adaptation mechanisms.

How does TIFY11E differ from other members of the TIFY family?

TIFY11E represents a specific subfamily within the larger TIFY transcription factor family. The TIFY family includes several distinct subfamilies with different functions, including TIFY11A, TIFY11B, TIFY11C, TIFY11E, TIFY11F, TIFY3, TIFY5A, TIFY6A, TIFY6B, TIFY10A, TIFY10B, and TIFY10C . While all share the conserved TIFY domain, these subfamilies have evolved distinct functions in plant hormone signaling and stress responses. TIFY11E specifically functions in salt and dehydration stress responses, while other family members may have specialized roles in different aspects of plant physiology and development.

What are the typical specifications of commercially available TIFY11E antibodies?

Commercial TIFY11E antibodies are typically available as polyclonal or monoclonal preparations. Based on similar antibodies in the TIFY family, these antibodies are generally supplied in buffer solutions containing preservatives, with concentrations ranging from 0.1-1 mg/ml . They are typically validated for applications such as Western blotting, immunoprecipitation, immunohistochemistry, and ELISA. Most suppliers provide detailed specifications including the immunogen used, host species, clonality, and validated applications.

What are the recommended applications for TIFY11E antibodies in plant research?

TIFY11E antibodies can be employed in various experimental approaches:

• Western blotting: For quantitative analysis of TIFY11E protein expression under different stress conditions or hormone treatments

• Immunoprecipitation: To identify protein interaction partners involved in hormone signaling cascades

• Chromatin immunoprecipitation (ChIP): To identify genomic binding sites and transcriptional targets

• Immunohistochemistry/Immunofluorescence: To determine tissue and subcellular localization

• ELISA: For quantitative measurement of TIFY11E levels in plant extracts

These applications enable comprehensive characterization of TIFY11E's role in plant stress responses and hormone signaling pathways.

How should I optimize Western blot protocols for TIFY11E detection?

For optimal Western blot results with TIFY11E antibodies:

• Sample preparation:

  • Extract proteins using a buffer containing 50 mM Tris-HCl (pH 7.5), 150 mM NaCl, 1% Triton X-100, 0.5% sodium deoxycholate, protease inhibitors

  • Add phosphatase inhibitors if studying post-translational modifications

  • Sonicate briefly to shear DNA and reduce sample viscosity

• Electrophoresis conditions:

  • Use 10-12% SDS-PAGE gels for optimal separation

  • Load 20-50 μg of total protein per lane

  • Include molecular weight markers that span the expected size range

• Transfer and detection:

  • Transfer to PVDF membrane at 100V for 1 hour or 30V overnight at 4°C

  • Block with 5% non-fat dry milk or BSA in TBST for 1-2 hours

  • Incubate with primary antibody at 1:500-1:2000 dilution overnight at 4°C

  • Wash thoroughly (4 × 5 min) with TBST

  • Incubate with HRP-conjugated secondary antibody at 1:5000-1:10000 for 1 hour

  • Develop using enhanced chemiluminescence

• Controls:

  • Include positive control (tissue known to express TIFY11E)

  • Include negative control (tissue with low/no TIFY11E expression)

  • Consider peptide competition assay to confirm specificity

How can I use TIFY11E antibodies to study protein-protein interactions?

TIFY11E protein interactions can be studied using several antibody-based approaches:

• Co-immunoprecipitation (Co-IP):

  • Lyse plant tissues in non-denaturing buffer

  • Pre-clear lysate with protein A/G beads

  • Incubate with TIFY11E antibody overnight at 4°C

  • Add protein A/G beads, incubate for 2-4 hours

  • Wash extensively and elute bound proteins

  • Analyze by Western blot or mass spectrometry

• Proximity Ligation Assay (PLA):

  • Fix and permeabilize plant cells/tissues

  • Incubate with TIFY11E antibody and antibody against potential interactor

  • Add PLA probes (secondary antibodies with oligonucleotides)

  • Perform ligation and amplification

  • Visualize interaction signals by fluorescence microscopy

• Pull-down assays with recombinant proteins:

  • Express recombinant TIFY11E as a tagged fusion protein

  • Incubate with plant extracts

  • Analyze pulled-down proteins by immunoblotting with specific antibodies

These methods provide complementary information about TIFY11E interaction networks in different experimental contexts.

What are common issues when using TIFY11E antibodies and how can they be resolved?

How can I validate the specificity of TIFY11E antibodies?

To ensure antibody specificity:

• Peptide competition assay:

  • Pre-incubate antibody with excess immunizing peptide

  • Run parallel Western blots with blocked and unblocked antibody

  • Specific bands should disappear in the blocked sample

• Genetic validation:

  • Test antibody in TIFY11E knockout/knockdown lines

  • Specific signals should be reduced or eliminated

• Heterologous expression:

  • Express recombinant TIFY11E in a heterologous system

  • Confirm detection of the expressed protein

• Cross-reactivity assessment:

  • Test against recombinant proteins from related TIFY subfamilies

  • Quantify relative binding to assess specificity

• Multiple antibody comparison:

  • Compare results using antibodies against different epitopes

  • Consistent results increase confidence in specificity

How do I determine the optimal antibody concentration for my experiment?

To determine optimal antibody concentration:

• Titration experiment:

  • Prepare a dilution series (e.g., 1:250, 1:500, 1:1000, 1:2000, 1:5000)

  • Run identical samples with each dilution

  • Select the dilution that gives specific signal with minimal background

• Application-specific considerations:

  • Western blotting: typically 1:500-1:2000

  • Immunoprecipitation: 2-5 μg antibody per mg of protein

  • Immunohistochemistry: typically more concentrated (1:100-1:500)

  • ChIP: 2-10 μg per reaction

• Batch-to-batch variation:

  • Repeat titration with each new antibody lot

  • Document optimal conditions for reproducibility

How can TIFY11E antibodies be used in chromatin immunoprecipitation (ChIP) experiments?

For effective ChIP experiments with TIFY11E antibodies:

• Sample preparation:

  • Cross-link plant tissue with 1% formaldehyde for 10-15 minutes

  • Quench with 125 mM glycine

  • Isolate nuclei and sonicate chromatin to 200-500 bp fragments

  • Verify fragmentation by agarose gel electrophoresis

• Immunoprecipitation:

  • Pre-clear chromatin with protein A/G beads

  • Incubate with 5-10 μg TIFY11E antibody overnight at 4°C

  • Add protein A/G beads and incubate for 2-4 hours

  • Wash thoroughly with increasingly stringent buffers

  • Elute bound chromatin and reverse cross-links

• DNA analysis:

  • Purify DNA using phenol-chloroform extraction or column purification

  • Analyze enrichment by qPCR using primers for predicted binding sites

  • For genome-wide analysis, prepare libraries for ChIP-seq

  • Compare to input control and IgG control for specificity

• Data interpretation:

  • Identify enriched regions (peaks) using appropriate software

  • Perform motif analysis to identify binding sequences

  • Integrate with transcriptome data to identify direct targets

  • Validate selected targets by reporter assays

Can TIFY11E antibodies be used to study post-translational modifications?

Yes, TIFY11E antibodies can be valuable tools for studying post-translational modifications (PTMs) with these approaches:

• Detection of modified forms:

  • Run protein samples on Phos-tag gels to separate phosphorylated forms

  • Use 2D gel electrophoresis to separate based on charge and mass

  • Treat samples with phosphatase, deubiquitinase, or other enzymes to confirm specific modifications

• Enrichment of modified proteins:

  • Immunoprecipitate TIFY11E under non-denaturing conditions

  • Analyze by Western blotting with antibodies against specific PTMs (phospho, ubiquitin, SUMO, etc.)

  • Alternatively, perform immunoprecipitation with PTM-specific antibodies and probe for TIFY11E

• Mass spectrometry analysis:

  • Immunoprecipitate TIFY11E from plant tissues

  • Digest with trypsin and analyze by LC-MS/MS

  • Identify specific modification sites and their abundance

• Functional studies:

  • Compare PTM patterns under different stress conditions

  • Correlate modifications with protein activity, localization, or stability

  • Generate antibodies specific to modified forms for targeted studies

How can TIFY11E antibodies contribute to understanding plant stress resilience mechanisms?

TIFY11E antibodies provide valuable tools for investigating stress response mechanisms:

• Expression dynamics:

  • Monitor TIFY11E protein levels during stress exposure

  • Compare expression patterns across different tissues and developmental stages

  • Correlate protein abundance with stress tolerance phenotypes

• Signaling pathway analysis:

  • Identify upstream regulators by examining TIFY11E modifications

  • Map downstream targets through ChIP experiments

  • Study hormone-dependent regulation of TIFY11E

• Protein complex dynamics:

  • Characterize stress-induced changes in TIFY11E interaction partners

  • Identify complex composition in different cellular compartments

  • Monitor complex formation/dissolution during stress responses

• Transgenic approaches:

  • Validate antibody specificity using TIFY11E overexpression or knockout lines

  • Compare protein levels with phenotypic changes in stress tolerance

  • Evaluate the effects of specific mutations on protein function

These approaches collectively contribute to understanding how TIFY11E functions in plant stress adaptation mechanisms.

How are TIFY11E antibodies being used in comparative studies across plant species?

TIFY11E antibodies facilitate cross-species studies in several ways:

• Evolutionary conservation analysis:

  • Compare TIFY11E protein expression across different plant species

  • Examine conservation of expression patterns in response to stresses

  • Correlate protein structure with functional conservation

• Crop improvement applications:

  • Compare TIFY11E expression between stress-tolerant and susceptible varieties

  • Identify natural variation in protein abundance or modification

  • Use as biomarkers for selecting stress-resistant cultivars

• Methodological considerations:

  • Verify cross-reactivity of antibodies with orthologs from different species

  • Adjust protocols for species-specific tissues and protein extraction methods

  • Consider epitope conservation when interpreting results across species

What novel techniques are being developed that incorporate TIFY11E antibodies?

Innovative approaches incorporating TIFY11E antibodies include:

• Single-cell proteomics:

  • Isolate protoplasts from specific cell types

  • Analyze TIFY11E expression at single-cell resolution

  • Map cell-specific responses to environmental stresses

• In situ proximity labeling:

  • Create fusion proteins combining TIFY11E with BioID or APEX2

  • Map the local protein environment in living cells

  • Identify transient or weak interactions missed by conventional methods

• Super-resolution microscopy:

  • Label TIFY11E with fluorophore-conjugated antibodies

  • Visualize subnuclear localization and dynamics

  • Track protein movement during stress responses

• Antibody-based biosensors:

  • Develop FRET-based sensors using TIFY11E antibody fragments

  • Monitor protein conformational changes in real-time

  • Create diagnostic tools for stress responses

How do researchers reconcile discrepancies between TIFY11E antibody-based protein detection and transcript analysis?

When protein and transcript data don't align, consider these methodological approaches:

• Experimental validation:

  • Verify antibody specificity using multiple controls

  • Confirm transcript measurements with multiple primer sets

  • Use alternative protein detection methods (mass spectrometry)

• Biological explanations:

  • Investigate post-transcriptional regulation (miRNAs, RNA stability)

  • Examine translation efficiency through polysome profiling

  • Assess protein stability using cycloheximide chase assays

• Integrated analysis:

  • Perform time-course studies to detect temporal shifts

  • Combine transcript and protein data with functional assays

  • Use mathematical modeling to understand regulatory relationships

• Technical considerations:

  • Account for differences in detection sensitivity

  • Consider sample preparation artifacts

  • Evaluate normalization methods for both data types

Understanding these discrepancies often reveals important regulatory mechanisms controlling TIFY11E function.