PCMP-E71 Antibody

What is PCMP-E71 and what is its role in Arabidopsis thaliana?

PCMP-E71 (Uniprot No. Q9SY75) is a protein in Arabidopsis thaliana (Mouse-ear cress), a model organism widely used in plant biology research. This protein belongs to the pentatricopeptide repeat (PPR) family of proteins, which are involved in RNA processing, particularly in organelles such as mitochondria and chloroplasts. These proteins play crucial roles in plant development, stress responses, and metabolic regulation .

What are the validated applications for PCMP-E71 antibody?

The PCMP-E71 antibody (CSB-PA879879XA01DOA) has been validated for the following applications:

• Enzyme-Linked Immunosorbent Assay (ELISA)

• Western Blotting (WB)

These applications have been tested to ensure identification of the antigen. The antibody is provided for research use only and is not intended for diagnostic or therapeutic procedures .

What are the specificity characteristics of the available PCMP-E71 antibody?

The commercially available PCMP-E71 antibody is:

• Polyclonal, raised in rabbit

• Immunogen: Recombinant Arabidopsis thaliana PCMP-E71 protein

• Species reactivity: Arabidopsis thaliana

• Purification method: Antigen affinity purified

• Isotype: IgG

What are the optimal conditions for using PCMP-E71 antibody in Western blotting?

For optimal Western blotting results with PCMP-E71 antibody:

• Sample preparation:

  • Use freshly prepared plant tissue lysates

  • Include protease inhibitors to prevent protein degradation

  • Ensure proper denaturation of proteins with appropriate SDS-PAGE loading buffer

• Recommended protocol:

  • Transfer: Use PVDF membrane for optimal protein binding

  • Blocking: 5% non-fat dry milk in TBST for 1 hour at room temperature

  • Primary antibody (PCMP-E71): Dilute 1:500-1:2000 in blocking buffer

  • Incubation: Overnight at 4°C with gentle rocking

  • Secondary antibody: Anti-rabbit IgG conjugated with HRP at 1:5000 dilution

  • Detection: Enhanced chemiluminescence (ECL) system

• Controls: Include positive controls (wild-type Arabidopsis) and negative controls (when possible, PCMP-E71 knockout/knockdown lines) .

How should researchers validate antibody specificity for PCMP-E71?

Thorough validation is essential since antibody quality varies significantly across suppliers. Based on rigorous third-party testing methodology:

• Essential validation methods:

  • Test in PCMP-E71 knockout cell lines (using CRISPR/Cas9 system if available)

  • Compare results in tissues with high vs. low PCMP-E71 mRNA expression

  • Test across multiple applications (ELISA, WB, IF) to ensure consistent specificity

• Specificity analysis:

  • A highly specific antibody should show a single band of appropriate molecular weight in Western blot

  • Signal should be absent in knockout samples

  • Signal intensity should correlate with known expression levels

Recent independent studies found only about one-third of commercially available polyclonal antibodies recognize their targets with high specificity across multiple applications, highlighting the importance of rigorous validation .

What are the recommended storage and handling conditions for PCMP-E71 antibody?

Proper storage and handling are critical for maintaining antibody activity:

Storage specifications:

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

• Avoid repeated freeze-thaw cycles

• Storage buffer: Preservative (0.03% Proclin 300) and constituents (50% Glycerol, 0.01M PBS, pH 7.4)

For long-term preservation of activity, aliquot the antibody upon first thaw and store aliquots at -80°C to minimize freeze-thaw cycles.

What are common troubleshooting approaches for weak or no signal when using PCMP-E71 antibody?

How can researchers optimize protein extraction from Arabidopsis tissues for PCMP-E71 detection?

Optimized extraction protocol for plant tissues:

• Buffer composition:

  • 50 mM Tris-HCl (pH 7.5)

  • 150 mM NaCl

  • 1% Triton X-100

  • 1 mM EDTA

  • 1 mM DTT

  • Protease inhibitor cocktail

• Extraction procedure:

  • Flash freeze tissue in liquid nitrogen

  • Grind to fine powder while keeping frozen

  • Add extraction buffer (4 mL per gram of tissue)

  • Homogenize thoroughly

  • Centrifuge at 12,000 × g for 15 minutes at 4°C

  • Collect supernatant and quantify protein concentration

  • Store at -80°C in small aliquots

This method helps preserve protein integrity and reduces degradation, important for accurate detection of PCMP-E71 .

How should researchers quantify and analyze Western blot results using PCMP-E71 antibody?

For accurate quantification and analysis:

• Quantification approach:

  • Use digital image analysis software (ImageJ, ImageLab, etc.)

  • Normalize PCMP-E71 signals to appropriate loading controls

  • Use integrated density measurements rather than maximum intensity

• Statistical analysis:

  • Perform at least three biological replicates

  • Apply appropriate statistical tests based on experimental design

  • For comparative studies, use ANOVA with post-hoc tests

  • Report mean values with standard error or deviation

• Data interpretation:

  • Consider the dynamic range of detection

  • Be cautious with fold-change interpretations in highly abundant or scarce proteins

  • Note potential post-translational modifications that may affect migration pattern

How can phosphoproteomic analyses be integrated with PCMP-E71 antibody research?

Modern phosphoproteomic approaches can complement antibody-based studies:

• Integrated workflow:

  • Use PCMP-E71 antibody for targeted protein detection

  • Perform immunoprecipitation using the antibody

  • Submit precipitated proteins for phosphoproteomic analysis

  • Identify phosphorylation sites using LC-MS/MS

• Data integration:

  • Compare phosphorylation patterns across different conditions

  • Correlate phosphorylation status with protein function or localization

  • Map identified phosphorylation sites to known regulatory domains

Studies using similar approaches have successfully identified phosphorylation events in proteins interacting with FKBP1A in heart tissue and GJA1 in aortic tissue, revealing critical regulatory mechanisms .

What are emerging applications of PCMP-E71 antibody in plant stress response studies?

PCMP-E71 antibody can be utilized in several advanced research contexts:

• Stress response characterization:

  • Track protein expression changes under various abiotic stresses (drought, salt, temperature)

  • Identify post-translational modifications in response to stress conditions

  • Study protein-protein interactions that may be stress-dependent

• Methodological approaches:

  • Combine immunolocalization with cellular fractionation to track protein translocation

  • Use antibody in chromatin immunoprecipitation if PCMP-E71 has DNA-binding properties

  • Employ proximity labeling techniques with the antibody to identify novel interaction partners

These approaches can provide insights into how PCMP-E71 contributes to plant adaptation mechanisms under environmental stress.

How can PCMP-E71 antibody contribute to metabolic network research in plants?

Metabolic modeling studies can benefit from PCMP-E71 antibody research:

• Integration with metabolic networks:

  • Use antibody to validate predictions from genome-scale metabolic models

  • Track protein abundance changes in response to metabolic perturbations

  • Correlate protein expression patterns with metabolomic datasets

• Research applications:

  • Study RNA editing functions potentially influenced by PCMP-E71

  • Investigate the role of PCMP-E71 in organellar metabolism

  • Explore connections between PCMP-E71 and key metabolic pathways

Metabolic modeling has proven valuable in identifying drug targets and understanding metabolic regulation in various organisms, from bacteria to cancer cells. Similar approaches can be applied to plant metabolism studies involving PCMP-E71 .

What quality control measures should researchers implement when working with PCMP-E71 antibody?

Based on recent third-party testing initiatives of antibodies:

• Pre-experiment validation:

  • Verify antibody specificity in your experimental system

  • Test different antibody lots for consistent performance

  • Document validation results thoroughly

• Experimental controls:

  • Include cellular systems with known expression levels

  • When possible, use genetic knockdown or knockout systems

  • Include isotype controls to assess non-specific binding

• Reporting standards:

  • Document antibody source, catalog number, and lot

  • Report detailed experimental conditions

  • Present raw data alongside processed results

Third-party testing has shown recombinant antibodies generally outperform monoclonal and polyclonal antibodies in specificity tests, though well-validated polyclonal antibodies like the PCMP-E71 antibody can still provide reliable results when properly characterized .

What are the implications of recent antibody validation studies for PCMP-E71 research?

Recent comprehensive third-party testing of commercial antibodies has revealed important considerations:

• Validation concerns:

  • Studies found only ~33% of polyclonal and monoclonal antibodies recognize their targets in recommended applications

  • Many antibodies used in hundreds of published studies failed specificity tests

  • These issues contribute to the reproducibility crisis in basic research

• Best practices:

  • Prioritize antibodies that have undergone third-party validation

  • Consider using knockout cell lines or tissues as negative controls

  • Implement multiple detection methods to confirm findings

• Future directions:

  • Centralized third-party validation could identify the most effective antibodies

  • Greater transparency from manufacturers about validation methods

  • Development of comprehensive repositories of knockout cells for validation