YOR263C Antibody

What is YOR263C protein and why is it studied?

YOR263C is a gene/protein in Saccharomyces cerevisiae (Baker's yeast), identified in the systematic genome sequencing project with Uniprot accession number Q08728 . This protein is studied primarily in the context of yeast molecular biology and cellular processes. While the search results don't provide extensive information on its specific function, it appears in research contexts related to membrane interactions, as seen in studies examining ESCRT's impact on membrane lesions . YOR263C represents an important research target for understanding fundamental yeast cellular processes. Research on yeast proteins like YOR263C contributes significantly to our understanding of eukaryotic cell biology due to the high degree of conservation of basic cellular mechanisms between yeast and higher eukaryotes.

What are the optimal storage conditions for YOR263C Antibody?

The YOR263C Antibody should be stored at -20°C or -80°C upon receipt . It's critical to avoid repeated freeze-thaw cycles as they can degrade antibody quality and reduce binding efficiency . The antibody is provided in liquid form with a storage buffer containing 50% glycerol, 0.01M PBS (pH 7.4), and 0.03% Proclin 300 as a preservative . This buffer composition helps maintain antibody stability during long-term storage. For working aliquots, researchers should divide the stock into small volumes to minimize freeze-thaw cycles. When handling the antibody, always wear gloves and work in clean conditions to prevent contamination that could affect experimental outcomes.

What detection methods can be used with YOR263C Antibody?

The YOR263C Antibody has been tested and validated for multiple detection methods, primarily:

• Western Blot (WB): For detecting the target protein in cell lysates and tissue homogenates, providing information about protein size and expression levels .

• Enzyme-Linked Immunosorbent Assay (ELISA): For quantitative detection of the target protein in solution .

While not explicitly mentioned in the product documentation, based on standard antibody applications, this polyclonal antibody might potentially be suitable for:

• Immunoprecipitation (IP): To isolate and purify the target protein from complex mixtures.

• Immunofluorescence (IF): To visualize protein localization within cells, though this would require additional validation.

When employing any method, proper identification of the antigen should be ensured through appropriate controls .

What are the optimal Western Blot conditions for YOR263C Antibody?

For optimal Western Blot results with YOR263C Antibody, researchers should follow these methodological guidelines:

Sample Preparation:

• Prepare yeast cell lysates using standard protocols (e.g., glass bead lysis or enzymatic digestion)

• Include protease inhibitors to prevent protein degradation

• Denature samples in standard Laemmli buffer with β-mercaptoethanol

SDS-PAGE and Transfer:

• Use 10-12% polyacrylamide gels for optimal resolution

• Transfer to PVDF or nitrocellulose membranes at 100V for 60-90 minutes

Antibody Incubation:

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

• Dilute YOR263C Antibody at 1:500 to 1:2000 in blocking buffer (optimization recommended)

• Incubate overnight at 4°C with gentle agitation

• Wash 3-5 times with TBST

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

Detection:

• Use enhanced chemiluminescence (ECL) detection system

• Expose to X-ray film or image using a digital imaging system

As an antigen affinity-purified polyclonal antibody, YOR263C Antibody should provide specific detection of the target protein when these conditions are properly optimized for your specific experimental system .

How can I validate the specificity of YOR263C Antibody in my experiments?

Validating antibody specificity is crucial for generating reliable data. For YOR263C Antibody, consider these methodological approaches:

• Positive and Negative Controls:

  • Use wild-type yeast expressing YOR263C as a positive control

  • Use YOR263C knockout strains as negative controls

  • Compare results from multiple antibody lots if available

• Peptide Competition Assay:

  • Pre-incubate the antibody with excess purified YOR263C protein or immunizing peptide

  • Run parallel Western blots with blocked and unblocked antibody

  • Specific signals should be significantly reduced or eliminated in the blocked sample

• Correlation with Alternative Detection Methods:

  • Compare protein detection with mRNA expression levels via qPCR

  • Use tagged versions of YOR263C and detect with tag-specific antibodies

• Mass Spectrometry Validation:

  • Immunoprecipitate the protein using YOR263C Antibody

  • Analyze the precipitated proteins by mass spectrometry

  • Confirm the presence of YOR263C peptides

This multi-faceted validation approach ensures that signals detected are specific to YOR263C rather than cross-reactive proteins, particularly important given the complex nature of yeast cell extracts .

What controls should be included in experiments using YOR263C Antibody?

For rigorous experimental design with YOR263C Antibody, the following controls should be included:

Essential Controls:

• Positive Control: Wild-type yeast lysate known to express YOR263C protein

• Negative Control: YOR263C deletion strain lysate

• Loading Control: Detection of a constitutively expressed yeast protein (e.g., actin, GAPDH)

• Secondary Antibody Only Control: Omit primary antibody to check for non-specific binding

Additional Controls for Specific Applications:

• For Western Blot:

  • Pre-immunization serum control (if available)

  • Recombinant YOR263C protein as a size reference

• For Immunoprecipitation:

  • Non-specific IgG control

  • Input sample (pre-IP lysate)

• For ELISA:

  • Standard curve using recombinant YOR263C

  • Blank wells (no antigen)

• For Expression Studies:

  • Time-course or condition-specific reference samples

  • Biological replicates (minimum three) for statistical analysis

These controls help distinguish true YOR263C-specific signals from technical artifacts, cross-reactivity, or non-specific binding, ensuring the reliability and reproducibility of experimental results .

How can I optimize immunoprecipitation protocols with YOR263C Antibody?

Optimizing immunoprecipitation (IP) with YOR263C Antibody requires careful consideration of several methodological factors:

Buffer Optimization:

• Use mild lysis buffers (e.g., 50 mM Tris-HCl pH 7.4, 150 mM NaCl, 1% NP-40 or Triton X-100)

• Add protease inhibitors freshly before use

• Consider adding phosphatase inhibitors if studying phosphorylation

• Optimize detergent type and concentration based on protein localization

Antibody Coupling:

• Directly couple 2-5 μg of YOR263C Antibody to protein A/G beads

• Pre-clear lysate with protein A/G beads alone to reduce non-specific binding

• For co-IP studies, consider using a chemical crosslinker to covalently bind the antibody to beads

Incubation Conditions:

• Incubate lysate with antibody-coupled beads for 2-4 hours at 4°C with gentle rotation

• Wash beads 3-5 times with lysis buffer containing reduced detergent

• Elute proteins using either SDS sample buffer for Western blot analysis or mild elution conditions for functional studies

Validation Strategy:

• Confirm successful IP by Western blot using a portion of the IP sample

• Identify co-immunoprecipitated proteins by mass spectrometry

• Compare results with known YOR263C interaction data from databases

This optimized protocol leverages the polyclonal nature of YOR263C Antibody, which recognizes multiple epitopes and potentially increases IP efficiency compared to monoclonal antibodies .

How can YOR263C Antibody be used in studying yeast cellular processes?

YOR263C Antibody offers several sophisticated applications for investigating yeast cellular processes:

Protein Localization Studies:

• Subcellular fractionation followed by Western blot analysis to determine compartment-specific distribution

• Immunofluorescence microscopy (if validated) to visualize spatial distribution within cells

• Co-localization studies with known organelle markers

Protein Expression Analysis:

• Monitor YOR263C expression under different growth conditions or stress responses

• Quantify protein levels during cell cycle progression

• Compare expression between wild-type and mutant strains

Protein-Protein Interaction Networks:

• Co-immunoprecipitation to identify direct binding partners

• Proximity labeling techniques (when combined with appropriate tagging)

• Validation of interactions identified through high-throughput screens

Post-Translational Modifications:

• Detection of specific modifications using modification-specific antibodies after IP with YOR263C Antibody

• Analysis of how modifications affect YOR263C function or localization

These applications provide insights into the functional role of YOR263C in yeast biology, potentially revealing connections to membrane processes as suggested by its mention in membrane lesion studies . Each application requires careful optimization and appropriate controls to ensure reliable results.

What is known about YOR263C's role in yeast molecular pathways?

While the provided search results contain limited specific information about YOR263C's molecular functions, we can analyze what is known and potential research directions:

Known Associations:

• The protein appears in research related to ESCRT and membrane lesions, suggesting a potential role in membrane biology or trafficking pathways

• As a yeast protein (Uniprot Q08728), it likely participates in conserved eukaryotic cellular processes

Research Approaches to Elucidate Function:

• Interaction Mapping:

  • Using YOR263C Antibody for co-IP followed by mass spectrometry

  • Yeast two-hybrid screening with YOR263C as bait

• Phenotypic Analysis:

  • Characterization of YOR263C deletion or overexpression strains

  • Growth assays under various stress conditions

• Comparative Genomics:

  • Identification of orthologs in other species

  • Functional prediction based on conserved domains

• Transcriptional Profiling:

  • RNA-seq analysis of YOR263C mutants

  • Identification of genes co-regulated with YOR263C

The antibody serves as a key tool in these approaches, enabling protein detection and characterization in various experimental contexts. Researchers investigating YOR263C should consult yeast genome databases for additional functional information and potential interactions that may not be captured in the provided search results.

How can epitope mapping be performed with YOR263C Antibody?

Epitope mapping with YOR263C Antibody can reveal critical antigenic determinants and structure-function relationships. Several methodological approaches can be employed:

1. Peptide Array Analysis:

• Synthesize overlapping peptides (15-20 amino acids) spanning the entire YOR263C sequence

• Spot peptides onto membranes or microarrays

• Probe with YOR263C Antibody followed by detection

• Identify peptides showing positive signals to map linear epitopes

2. Truncation Mutant Analysis:

• Generate a series of truncated YOR263C constructs

• Express and purify truncated proteins

• Test antibody binding via Western blot or ELISA

• Narrow down regions containing epitopes

3. Alanine Scanning Mutagenesis:

• Create point mutations replacing key amino acids with alanine

• Express mutant proteins and test antibody binding

• Identify critical residues for antibody recognition

4. Hydrogen-Deuterium Exchange Mass Spectrometry:

• Compare exchange rates in free protein versus antibody-bound protein

• Regions with reduced exchange when antibody-bound indicate epitope locations

5. X-ray Crystallography or Cryo-EM:

• For highest resolution mapping, solve the structure of YOR263C-antibody complex

• Directly visualize the binding interface

As a polyclonal antibody, YOR263C Antibody likely recognizes multiple epitopes, which should be considered when interpreting results . This information can provide valuable insights into protein structure and guide the development of more specific detection reagents.

What structural insights can be gained from YOR263C Antibody binding studies?

YOR263C Antibody binding studies can yield substantial structural insights through several advanced methodological approaches:

Conformational Analysis:

• Compare antibody binding to native versus denatured YOR263C to identify conformational epitopes

• Use circular dichroism (CD) spectroscopy to analyze structural changes upon antibody binding

• Apply limited proteolysis to antibody-bound protein to identify protected regions

Accessibility Mapping:

• Use the antibody to probe structural changes under different conditions

• Compare binding efficiency to YOR263C in different buffer conditions

• Identify regions that become exposed or hidden during protein interactions

Functional Domain Identification:

• Correlate epitope mapping data with predicted functional domains

• Test whether antibody binding affects specific protein functions

• Develop function-blocking antibodies based on epitope knowledge

Integration with Computational Models:

• Compare experimental antibody binding data with predicted protein structures

• Refine structural models based on experimentally determined epitopes

• Generate antibody-antigen docking models

This structural information provides insights beyond simple detection of YOR263C, potentially revealing mechanistic details about protein function and interaction interfaces. The polyclonal nature of the antibody provides an advantage for detecting multiple structural features simultaneously .

How can I resolve high background issues when using YOR263C Antibody?

High background is a common challenge when working with antibodies. For YOR263C Antibody, consider these methodological solutions:

Western Blot Optimization:

• Blocking Optimization:

  • Test different blocking agents (5% milk, 3-5% BSA, commercial blockers)

  • Increase blocking time to 2 hours at room temperature or overnight at 4°C

  • Add 0.1-0.3% Tween-20 to blocking buffer

• Antibody Dilution Optimization:

  • Test serial dilutions (1:500 to 1:5000) to find optimal signal-to-noise ratio

  • Prepare antibody in fresh blocking buffer

  • Consider adding 0.1-0.2% Tween-20 to antibody dilution buffer

• Washing Improvements:

  • Increase wash duration (5-10 minutes per wash)

  • Increase number of washes (5-6 times)

  • Use TBST with 0.1-0.3% Tween-20

• Membrane Handling:

  • Ensure membranes remain wet throughout the procedure

  • Handle membranes with clean forceps to avoid contamination

  • Consider fresh transfer buffer and clean transfer apparatus

ELISA Optimization:

• Titrate both primary and secondary antibodies

• Increase wash volume and number of washes

• Use validated blocking reagents known to work with yeast proteins

Sample-Related Solutions:

• Pre-clear lysates with Protein A/G beads before antibody incubation

• Filter samples through 0.45 μm filters to remove aggregates

• Include competing non-specific proteins (e.g., BSA) in antibody dilution buffer

These methodological adjustments should significantly reduce background while maintaining specific YOR263C signal .

What might cause false negative results with YOR263C Antibody?

False negative results can occur for multiple reasons when using YOR263C Antibody. Understanding these factors is crucial for accurate data interpretation:

Sample Preparation Issues:

• Protein Degradation:

  • Always use fresh protease inhibitors in lysis buffers

  • Maintain samples at 4°C during processing

  • Avoid repeated freeze-thaw cycles of samples

• Inadequate Extraction:

  • For yeast samples, ensure thorough cell wall disruption

  • Optimize lysis buffer composition for YOR263C solubilization

  • Consider different detergents if YOR263C is membrane-associated

Detection Method Limitations:

• Epitope Masking:

  • Protein-protein interactions may block antibody access

  • Post-translational modifications might alter epitope recognition

  • Protein conformation in native conditions may hide epitopes

• Technical Parameters:

  • Insufficient antibody concentration

  • Inadequate incubation time or temperature

  • Expired or degraded detection reagents

Expression Levels:

• Biological Variability:

  • YOR263C may be expressed at low levels under certain conditions

  • Expression might be cell-cycle dependent

  • Strain-specific variations in expression

Methodological Table: Troubleshooting False Negatives

By systematically addressing these factors, researchers can minimize false negative results and improve detection reliability .

How can I quantify YOR263C protein expression accurately?

Accurate quantification of YOR263C protein expression requires rigorous methodology and appropriate controls:

Western Blot Quantification:

• Sample Preparation Standardization:

  • Use consistent cell numbers or protein amounts across samples

  • Include a standard curve of recombinant YOR263C protein (if available)

  • Process all samples simultaneously to minimize variation

• Loading Control Normalization:

  • Probe for housekeeping proteins (e.g., actin, GAPDH, tubulin)

  • Calculate relative expression as YOR263C signal/loading control signal

  • Ensure loading control is in the linear detection range

• Image Acquisition and Analysis:

  • Use a digital imaging system with a linear dynamic range

  • Avoid overexposure which prevents accurate quantification

  • Analyze band intensities using software like ImageJ or specialized analysis tools

ELISA-Based Quantification:

• Develop a sandwich ELISA using YOR263C Antibody

• Generate a standard curve using purified recombinant YOR263C

• Ensure samples fall within the linear range of the standard curve

Advanced Quantification Methods:

• Mass Spectrometry:

  • Use selected reaction monitoring (SRM) or parallel reaction monitoring (PRM)

  • Include isotopically labeled peptide standards for absolute quantification

  • Immunoprecipitate with YOR263C Antibody before MS analysis for enrichment

• Automated Western Platforms:

  • Consider platforms like Jess or Wes (ProteinSimple) for higher reproducibility

  • These systems provide automated quantification with wider dynamic range

For all quantification methods, biological replicates (minimum n=3) and appropriate statistical analysis are essential for meaningful results .

How should contradictory results with YOR263C Antibody be interpreted?

Contradictory results when using YOR263C Antibody require systematic analysis and careful interpretation:

Sources of Contradiction and Resolution Strategies:

• Antibody-Related Factors:

  • Different lots may have variable specificity or sensitivity

  • Solution: Validate each new lot against a reference sample

  • Compare results using alternative antibodies if available

• Experimental Conditions:

  • Different lysis methods may extract different protein pools

  • Solution: Standardize protocols across experiments

  • Document all buffer compositions and conditions precisely

• Biological Variability:

  • YOR263C expression or modification may vary with growth conditions

  • Solution: Control growth conditions precisely

  • Record cell density, growth phase, and media composition

• Technical Approach:

  • Different detection methods have different sensitivities and limitations

  • Solution: Use multiple complementary techniques (WB, ELISA, MS)

  • Consider the specific advantages and limitations of each method

Methodological Framework for Resolving Contradictions:

• Reproduce the contradictory results under identical conditions to confirm the contradiction

• Systematically vary one parameter at a time to identify the source of variation

• Implement appropriate controls specific to each experimental condition

• Consider biological explanations for seemingly contradictory results:

  • Post-translational modifications affecting antibody recognition

  • Alternative splicing or processing of YOR263C

  • Protein-protein interactions masking epitopes

• Document and report all experimental conditions that influence results

This systematic approach helps distinguish genuine biological phenomena from technical artifacts, potentially leading to new insights about YOR263C regulation or function .

How does YOR263C protein function compare across different yeast strains?

Comparing YOR263C across yeast strains requires methodological approaches that account for genetic and phenotypic variation:

Sequence Comparison Methodology:

• Perform sequence alignment of YOR263C across multiple yeast strains

• Identify conserved domains and strain-specific variations

• Correlate sequence variations with functional differences

Expression Analysis Across Strains:

• Use YOR263C Antibody to detect and quantify protein levels in different strains

• Normalize expression to appropriate housekeeping proteins

• Correlate expression levels with strain-specific phenotypes

Functional Conservation Assessment:

• Create YOR263C deletion strains in multiple genetic backgrounds

• Compare phenotypic consequences across strains

• Perform complementation studies with YOR263C variants

Example Data Table: YOR263C Comparison Across Yeast Strains

The YOR263C Antibody serves as a critical tool in these comparative studies, allowing researchers to examine protein expression and properties across diverse genetic backgrounds . Such comparisons can reveal strain-specific adaptations and evolutionary conservation patterns of the YOR263C protein.

What are the known homologs of YOR263C in other organisms?

Understanding YOR263C homologs across species provides evolutionary context and potential functional insights:

Homology Identification Methods:

• Sequence-Based Approaches:

  • BLAST analysis against genomic and protein databases

  • PSI-BLAST for detecting distant homologs

  • HMM-based searches using HMMER

• Structural Prediction:

  • Use of AlphaFold or similar tools to predict YOR263C structure

  • Structure-based homology detection using tools like DALI

• Functional Domain Analysis:

  • Identification of conserved domains using Pfam or InterPro

  • Conservation analysis of specific functional motifs

Cross-Reactivity Testing:

• Examine if YOR263C Antibody recognizes homologs in closely related yeast species

• Test antibody reactivity against predicted homologs in model organisms

• Develop homolog-specific antibodies for comparative studies

Evolutionary Analysis:

• Construct phylogenetic trees to visualize evolutionary relationships

• Calculate selection pressures (dN/dS ratios) on different protein regions

• Identify conserved vs. rapidly evolving regions

While the search results don't provide specific information about YOR263C homologs, this methodological framework allows researchers to identify potential homologs and assess functional conservation across species. Such analysis can provide insights into the fundamental biological role of YOR263C and its evolutionary significance .

How can YOR263C Antibody be used in evolutionary studies?

YOR263C Antibody can serve as a valuable tool in evolutionary studies through several methodological approaches:

Cross-Species Reactivity Analysis:

• Test antibody recognition across related yeast species

• Determine epitope conservation through comparative binding studies

• Create a cross-reactivity profile correlating with evolutionary distance

Protein Conservation Mapping:

• Use the antibody to detect expressed homologs in different species

• Compare protein expression levels across evolutionary lineages

• Correlate expression patterns with species-specific adaptations

Functional Conservation Assessment:

• Immunoprecipitate YOR263C and homologs from different species

• Compare interaction partners across species using mass spectrometry

• Identify conserved vs. species-specific protein complexes

Research Design for Evolutionary Studies:

• Sample Preparation:

  • Prepare protein extracts from phylogenetically diverse yeast species

  • Ensure consistent extraction methods across all samples

  • Normalize protein concentrations for fair comparison

• Detection Methods:

  • Western blot analysis with optimized conditions for cross-species detection

  • Immunofluorescence to compare subcellular localization across species

  • Co-immunoprecipitation to examine conservation of protein interactions

• Data Analysis:

  • Correlate antibody binding affinity with sequence divergence

  • Integrate findings with phylogenetic data

  • Model the evolution of epitope regions

This approach leverages the specificity of YOR263C Antibody to examine protein conservation patterns, potentially revealing how selective pressures have shaped YOR263C function throughout evolutionary history .

What databases and resources are available for YOR263C research?

Researchers studying YOR263C can leverage numerous databases and resources to enhance their investigations:

Yeast-Specific Databases:

• Saccharomyces Genome Database (SGD):

  • Comprehensive resource for S. cerevisiae genomic data

  • Contains gene function annotations, phenotype data, and protein interactions

  • Provides literature references specific to YOR263C

• Yeast GFP Fusion Localization Database:

  • Data on subcellular localization of yeast proteins

  • Fluorescence microscopy images for protein localization patterns

• SPELL (Serial Pattern of Expression Levels Locator):

  • Expression patterns across different conditions

  • Co-expressed genes that may function with YOR263C

Antibody and Protein Resources:

• Patent and Literature Antibody Database (PLAbDab):

  • Contains literature-annotated antibody sequences and structures

  • Useful for comparing antibody properties and applications

• UniProt:

  • Detailed protein information for YOR263C (Q08728)

  • Sequence features, domains, and post-translational modifications

• Structural Antibody Database (SAbDab):

  • Repository of antibody structures

  • Useful for structural comparisons

• Observed Antibody Space (OAS):

  • Comprehensive database of antibody sequences from various sources

  • Valuable for sequence diversity analysis

Experimental Resources:

• AddGene and EUROSCARF:

  • Repositories of yeast strains and plasmids

  • May contain YOR263C deletion strains or tagged constructs

• BioGRID:

  • Database of protein-protein interactions

  • Physical and genetic interactions involving YOR263C

Integrating data from these resources with experimental results using YOR263C Antibody provides a comprehensive understanding of this yeast protein in its broader biological context .