YCR087W Antibody
Description
What is the YCR087W Antibody?
The YCR087W antibody is a polyclonal rabbit immunoglobulin (IgG) specifically targeting the protein encoded by the YCR087W gene in Saccharomyces cerevisiae (baker’s yeast). This gene encodes a putative uncharacterized protein, with no definitive functional annotations in yeast proteome databases . The antibody is designed for use in immunological assays, including enzyme-linked immunosorbent assay (ELISA) and Western blot (WB), to detect and analyze the YCR087W protein in yeast cell lysates or other biological samples .
Structure and Function
The YCR087W antibody conforms to the general structure of immunoglobulins (Ig), which are Y-shaped glycoproteins composed of two identical heavy chains and two identical light chains .
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Variable Region (F(ab)): Contains the paratope responsible for binding to the YCR087W protein’s epitope. Polyclonal antibodies, like this one, recognize multiple epitopes on the target antigen, increasing assay sensitivity but potentially introducing cross-reactivity .
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Constant Region (Fc): Mediates interactions with effector molecules (e.g., Fc receptors, complement proteins) and determines antibody class (e.g., IgG, IgA) .
3.1. Western Blot (WB)
The antibody is validated for WB analysis to detect YCR087W in yeast lysates . Optimal performance requires:
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SDS-PAGE separation of proteins.
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Transfer to PVDF or nitrocellulose membranes.
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Blocking with non-specific proteins (e.g., BSA, skim milk).
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Detection via secondary anti-rabbit IgG antibodies conjugated to HRP or fluorescent dyes .
3.2. Enzyme-Linked Immunosorbent Assay (ELISA)
ELISA protocols involve immobilizing YCR087W protein on a solid phase, followed by antibody binding and detection via chromogenic substrates (e.g., TMB) .
4.1. Production Workflow
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Immunization: Rabbits are immunized with purified YCR087W protein or peptide fragments.
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Antibody Purification: Affinity chromatography using the immunogen as bait .
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QC Testing: ELISA and WB validation to confirm specificity and titer .
4.2. Validation Challenges
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Cross-Reactivity: Polyclonal antibodies may bind non-target proteins, necessitating orthogonal controls (e.g., KO cell lysates) .
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Stability: IgG antibodies generally exhibit long half-lives (weeks to months), but degradation can occur under improper storage conditions (e.g., high temperature) .
5.1. Proteomic Context
The YCR087W protein remains uncharacterized in yeast, limiting functional insights. Comparative genomics suggest weak homology to Legionella proteins (e.g., sbpA) , but no direct functional evidence exists.
5.2. Antibody Performance
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Western Blot: Yields specific bands corresponding to the YCR087W protein’s molecular weight (~15–20 kDa, based on yeast proteome size trends) .
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ELISA: Demonstrates dose-dependent binding to recombinant YCR087W, with IC50 values comparable to commercial yeast antibodies .
5.3. Limitations
Product Specs
Composition: 50% Glycerol, 0.01M Phosphate Buffered Saline (PBS), pH 7.4
Q&A
What is YCR087W and why are antibodies against it significant in yeast research?
YCR087W is a gene in Saccharomyces cerevisiae (budding yeast) that encodes a protein involved in cellular processes. Antibodies targeting this protein are valuable tools for studying yeast cell biology, protein expression patterns, and molecular interactions. Unlike commercial antibodies that may lack specificity, research-grade YCR087W antibodies enable precise detection of the native protein and its modified forms in experimental systems . The development of these antibodies requires careful validation to ensure they recognize the intended epitope within the yeast proteome without cross-reactivity to other proteins.
What validation methods are essential before using YCR087W antibodies?
Before implementing YCR087W antibodies in experiments, researchers should verify:
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Specificity through western blot analysis comparing wild-type and YCR087W knockout strains
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Epitope accessibility in different experimental conditions
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Binding affinity and detection limits
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Cross-reactivity profiles against related yeast proteins
Validation should include positive and negative controls to confirm that observed signals represent genuine YCR087W detection rather than experimental artifacts . Document validation data systematically as this information will be crucial for troubleshooting and data interpretation in subsequent experiments.
What are the optimal conditions for using YCR087W antibodies in western blotting?
When performing western blotting with YCR087W antibodies, researchers should consider the following protocol optimizations:
| Parameter | Recommended Condition | Rationale |
|---|---|---|
| Sample preparation | Denaturing with SDS and heat at 95°C for 5 minutes | Ensures complete protein unfolding for epitope exposure |
| Protein loading | 20-40 μg total protein per lane | Provides adequate signal without background |
| Transfer method | Wet transfer at 100V for 1 hour | Optimizes transfer of yeast proteins to membrane |
| Blocking solution | 5% BSA in TBST, 1 hour at room temperature | Reduces non-specific binding without affecting antibody-epitope interaction |
| Primary antibody dilution | 1:1000 to 1:2000 | Balances signal strength with specificity |
| Incubation conditions | Overnight at 4°C with gentle agitation | Maximizes antibody binding while minimizing non-specific interactions |
| Detection method | ECL or fluorescence-based detection | Provides quantifiable results with appropriate dynamic range |
The writing of results from YCR087W antibody experiments should follow scientific standards with clear numerical expressions and appropriate statistical analysis . Data should be presented as mean/median ± standard deviation with absolute numerical values corresponding to percentages.
How can researchers effectively use YCR087W antibodies in immunoprecipitation studies?
For immunoprecipitation (IP) with YCR087W antibodies, consider this methodological approach:
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Prepare yeast cell lysates under non-denaturing conditions to preserve protein interactions
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Pre-clear lysates with protein A/G beads to reduce non-specific binding
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Incubate cleared lysates with YCR087W antibody (2-5 μg per mg of total protein)
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Capture antibody-protein complexes with protein A/G beads
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Wash stringently (at least 4-5 washes) to minimize background
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Elute bound proteins using SDS sample buffer or specific peptide competition
This approach enables isolation of YCR087W and its interaction partners for subsequent analysis by mass spectrometry or western blotting . Document experimental conditions meticulously, as subtle variations can significantly impact results.
How can YCR087W antibodies be integrated into proteomic workflows?
YCR087W antibodies can be valuable tools in comprehensive proteomic studies following these strategic approaches:
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Antibody-based enrichment: Use YCR087W antibodies coupled to beads for selective enrichment prior to mass spectrometry analysis
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Proximity labeling: Combine YCR087W antibodies with photoactivatable crosslinkers to identify transient interaction partners
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Sequential immunoprecipitation: Perform tandem purifications to isolate specific YCR087W-containing complexes with higher purity
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Chromatin immunoprecipitation (ChIP): If YCR087W has DNA-binding properties, use antibodies to map genomic binding sites
The selection of appropriate proteomic methods depends on the specific research question, available instrumentation, and expertise. Integration of antibody-based detection with mass spectrometry provides complementary data that enhances confidence in research findings .
What approaches enable quantitative analysis of YCR087W expression across experimental conditions?
Quantitative analysis of YCR087W requires robust methodologies:
| Technique | Application | Advantages | Considerations |
|---|---|---|---|
| Quantitative western blotting | Relative protein abundance | Simple implementation | Limited dynamic range |
| ELISA | Absolute quantification | High sensitivity and throughput | Requires purified standards |
| Flow cytometry | Single-cell analysis | Reveals population heterogeneity | Needs cell permeabilization |
| Immunofluorescence microscopy | Spatial distribution | Provides subcellular localization | Semi-quantitative |
| Proximity ligation assay | Protein-protein interactions | Single-molecule sensitivity | Complex optimization |
For accurate quantification, researchers should include standard curves using purified YCR087W protein and implement appropriate statistical analyses to determine significance . Data normalization against housekeeping proteins is essential for comparing YCR087W levels across different samples and conditions.
What are common sources of false results when using YCR087W antibodies?
Researchers should be aware of potential artifacts and implement appropriate controls:
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False positives: Can result from:
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Cross-reactivity with related yeast proteins
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Non-specific binding to abundant proteins
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Secondary antibody binding to endogenous immunoglobulins
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False negatives: May occur due to:
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Epitope masking by protein interactions or modifications
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Insufficient protein extraction
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Degradation during sample preparation
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Inappropriate detection sensitivity
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For reliable results, incorporate positive controls (purified YCR087W protein), negative controls (YCR087W knockout samples), and procedural controls (no primary antibody) . Document all experimental variables systematically to facilitate troubleshooting.
How should researchers address cross-reactivity issues with YCR087W antibodies?
When cross-reactivity is suspected, implement these strategies:
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Perform antibody pre-absorption with purified competing proteins
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Compare results with an alternative YCR087W antibody recognizing a different epitope
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Validate findings using orthogonal methods (e.g., mass spectrometry)
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Implement genetic approaches (knockout/knockdown) to confirm specificity
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Use epitope-tagged YCR087W constructs as additional controls
The writing of the results section should clearly articulate any cross-reactivity observations and explicitly state how they were addressed . This information is crucial for data reproducibility and scientific integrity.
How are YCR087W antibodies being used to study post-translational modifications?
Recent advances in antibody technology have enabled more sophisticated studies of YCR087W post-translational modifications:
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Modification-specific antibodies: Development of antibodies that specifically recognize phosphorylated, ubiquitinated, or acetylated forms of YCR087W
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Temporal dynamics: Using these antibodies to track modification changes during cellular responses
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Spatial regulation: Determining how modifications affect YCR087W localization
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Functional consequences: Correlating modification states with protein activity or interactions
When studying post-translational modifications, researchers should consider using combination approaches that integrate antibody-based detection with mass spectrometry validation . This provides complementary data that enhances confidence in the identification and functional significance of specific modifications.
What new methodologies show promise for enhancing YCR087W research?
Innovative approaches are expanding the utility of YCR087W antibodies:
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Microfluidic antibody-based assays: Enabling analysis of YCR087W in limited samples with higher throughput
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Single-molecule detection: Providing insights into YCR087W behavior at the individual molecule level
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Intrabodies: Engineering antibody fragments for intracellular expression to track YCR087W in living cells
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Nanobodies: Utilizing smaller antibody derivatives for improved access to sterically hindered epitopes
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Antibody-enzyme fusions: Creating proximity-dependent labeling systems to identify the YCR087W interactome
Similar to the approach used in COVID-19 antibody research, these methodologies can provide unprecedented insights into protein function in complex cellular environments . Researchers should evaluate these emerging techniques based on their specific research questions and technical requirements.
