YCR049C Antibody

What is YCR049C and why is it studied in yeast biology?

YCR049C is a protein encoded by the YCR049C gene in Saccharomyces cerevisiae (strain ATCC 204508 / S288c), commonly known as Baker's yeast. This protein has been studied as part of yeast genomic research to understand fundamental cellular processes that may have implications across eukaryotic biology. The antibody against this protein (Uniprot No. P25629) enables researchers to detect and quantify YCR049C expression in various experimental contexts . Understanding YCR049C function contributes to our knowledge of yeast cellular metabolism and potentially conserved mechanisms across species. The antibody is typically generated using recombinant protein as the immunogen and is purified through antigen affinity methods to ensure specificity .

What applications is the YCR049C antibody validated for?

The YCR049C antibody has been validated for several research applications, with primary validation for ELISA (Enzyme-Linked Immunosorbent Assay) and Western Blotting (WB) techniques . These methods allow for both quantitative and qualitative analysis of the YCR049C protein. In ELISA applications, the antibody enables quantification of the target protein in solution, while Western Blotting provides information about protein size, expression levels, and potential post-translational modifications. When designing experiments, researchers should note that validation specifically focuses on identification of the antigen in these contexts, and additional validation may be necessary for other applications such as immunohistochemistry or immunoprecipitation .

What are the optimal storage conditions for maintaining YCR049C antibody activity?

For maximum stability and retention of activity, YCR049C antibody should be stored at -20°C or -80°C immediately upon receipt . The antibody is provided in a protective buffer containing 50% glycerol, 0.01M PBS (pH 7.4) with 0.03% Proclin 300 as a preservative . This formulation helps maintain antibody integrity during freeze-thaw cycles, but repeated freezing and thawing should nevertheless be avoided as this can lead to degradation of the antibody structure and reduced binding efficiency. For short-term use (1-2 weeks), aliquoting a working solution that can be stored at 4°C is recommended. Proper storage is critical as suboptimal conditions can lead to experimental variability and potentially false negative results in sensitive applications like ELISA .

How should I design validation experiments for YCR049C antibody in new applications?

When validating YCR049C antibody for new applications beyond the manufacturer-verified ELISA and Western Blot techniques, a systematic approach is necessary. Begin with positive and negative controls: use wild-type Saccharomyces cerevisiae (strain ATCC 204508 / S288c) as your positive control and a YCR049C knockout strain as your negative control if available . For specificity testing, perform a peptide competition assay by pre-incubating the antibody with excess purified YCR049C protein before your experiment. This should substantially reduce or eliminate the detection signal. For cross-reactivity assessment, test the antibody against lysates from different yeast species or strains. Additionally, include appropriate technical controls such as secondary-antibody-only controls to assess non-specific binding. Document all optimization parameters including antibody dilution ranges, incubation times and temperatures, and detection methods to establish a reproducible protocol .

What are the recommended protocols for using YCR049C antibody in Western blotting?

For optimal Western blotting results with YCR049C antibody, begin with sample preparation by lysing yeast cells in a buffer containing protease inhibitors to prevent protein degradation. Separate proteins using SDS-PAGE (10-12% gel recommended for mid-sized proteins) and transfer to a PVDF or nitrocellulose membrane. Block the membrane with 5% non-fat milk or BSA in TBST for 1 hour at room temperature. Dilute the YCR049C antibody (CSB-PA326230XA01SVG) in blocking buffer; while the optimal dilution must be determined empirically, starting with 1:1000 is reasonable based on similar polyclonal antibodies . Incubate the membrane with diluted primary antibody overnight at 4°C with gentle agitation. After washing with TBST (3 × 5 minutes), incubate with HRP-conjugated anti-rabbit secondary antibody (as YCR049C antibody is raised in rabbit) for 1 hour at room temperature . Following additional washes, develop using chemiluminescent substrate and image. The expected molecular weight should be verified against the UniProt database entry (P25629) .

How can I optimize ELISA protocols using YCR049C antibody?

To optimize ELISA protocols using YCR049C antibody, start by coating high-binding 96-well plates with capture antibody or purified YCR049C protein, depending on whether you're performing a sandwich or direct ELISA. For sandwich ELISA, coat with a capture antibody against a different epitope of YCR049C at 1-10 μg/ml in carbonate buffer (pH 9.6) overnight at 4°C. After blocking with 1-3% BSA in PBS, add samples and standards containing YCR049C protein. Then add the detection YCR049C antibody (CSB-PA326230XA01SVG), followed by HRP-conjugated secondary antibody . For direct ELISA, coat the plate with your samples containing YCR049C protein, then proceed with the YCR049C antibody and detection steps. Critical optimization parameters include antibody concentration (perform a titration to determine optimal dilution), incubation times and temperatures, and washing stringency. Validate your assay by generating a standard curve using purified recombinant YCR049C protein to determine the linear detection range, sensitivity, and reproducibility of your assay .

How can YCR049C antibody be utilized in studying protein-protein interactions in yeast?

YCR049C antibody can be instrumental in investigating protein-protein interactions through co-immunoprecipitation (Co-IP) assays and proximity ligation assays (PLA). For Co-IP, lyse yeast cells under non-denaturing conditions to preserve protein-protein interactions. Pre-clear the lysate with Protein A/G beads, then incubate with YCR049C antibody overnight at 4°C. Capture the antibody-protein complexes using Protein A/G beads, wash thoroughly to remove non-specific binding, then elute and analyze by Western blotting for the presence of potential interacting partners . For proximity ligation assays, fix yeast cells and permeabilize them before incubating with YCR049C antibody and an antibody against a suspected interaction partner. Following the PLA protocol with species-specific secondary antibodies will generate fluorescent signals only when the two proteins are in close proximity (<40 nm). This approach provides spatial information about protein interactions within the cellular context. When interpreting results, controls using knockout strains and IgG isotype controls are essential to confirm specificity of detected interactions .

How can I apply YCR049C antibody in understanding yeast stress response mechanisms?

To investigate the role of YCR049C in yeast stress response mechanisms, design experiments that expose yeast cultures to various stressors (oxidative, heat, osmotic, nutrient deprivation) and analyze changes in YCR049C expression and localization using the YCR049C antibody. For expression analysis, collect samples at defined time points after stress induction, prepare lysates, and quantify YCR049C levels using Western blotting or ELISA . Subcellular redistribution can be assessed using immunofluorescence microscopy by fixing and permeabilizing yeast cells, then staining with YCR049C antibody followed by fluorophore-conjugated secondary antibody. Co-stain with organelle markers to track potential relocalization during stress. For a more comprehensive analysis, combine these approaches with transcriptomics to correlate protein expression changes with gene expression patterns. Additionally, use the antibody in chromatin immunoprecipitation (ChIP) assays if YCR049C is suspected to associate with DNA or chromatin-bound proteins during stress responses. Proper experimental design should include appropriate time course sampling and controls comparing wild-type to genetically modified yeast strains .

What are common causes of false negative results when using YCR049C antibody, and how can they be addressed?

False negative results when using YCR049C antibody can stem from several sources. First, inadequate protein extraction may result in insufficient target protein availability; optimize lysis buffers specifically for yeast cells, which have rigid cell walls requiring more aggressive extraction methods such as glass bead disruption or enzymatic cell wall digestion . Second, protein degradation during sample preparation can be prevented by working at 4°C with freshly added protease inhibitors. Third, inefficient protein transfer in Western blotting should be verified using reversible total protein stains like Ponceau S. Fourth, antibody degradation may occur with improper storage or repeated freeze-thaw cycles; store antibodies in small aliquots at -20°C or -80°C as recommended . Fifth, excessive blocking or washing can reduce sensitivity; optimize these steps with different blocking agents (milk vs. BSA) and washing stringency. Sixth, epitope masking by protein folding or post-translational modifications can be addressed by using denaturing conditions or testing multiple antibodies targeting different epitopes. Finally, insufficient antibody concentration may require titration experiments to determine optimal working dilutions for each application. If all troubleshooting steps fail, verify YCR049C expression in your samples using alternative methods such as mass spectrometry or RT-PCR .

How should I analyze and interpret quantitative data from YCR049C antibody experiments?

For rigorous analysis of quantitative data from YCR049C antibody experiments, implement a standardized workflow. In Western blot densitometry, use appropriate normalization controls such as housekeeping proteins (e.g., actin or GAPDH) or total protein staining methods to account for loading variations. Establish a linear dynamic range by performing serial dilutions of your samples to ensure quantification occurs within this range . For ELISA data, construct standard curves using purified recombinant YCR049C protein, applying appropriate curve-fitting models (four-parameter logistic regression is often optimal). Calculate coefficient of variation (CV) between technical replicates (target <10%) and between experimental repeats (target <20%) to ensure reliability. When comparing experimental conditions, apply appropriate statistical tests based on your experimental design and data distribution—typically t-tests for two-group comparisons or ANOVA for multiple groups, followed by post-hoc tests. For more complex datasets, consider multivariate analysis approaches. Report not only p-values but also effect sizes and confidence intervals. Be mindful of biological versus technical variation, and ensure biological replicates (n≥3) are included. Finally, visualize data appropriately using scatter plots or box plots rather than simple bar graphs to display data distribution .

How can I resolve conflicting results between YCR049C antibody detection and other protein detection methods?

When faced with discrepancies between YCR049C antibody detection and other protein detection methods, a systematic investigation is necessary. Begin by verifying antibody specificity through additional controls: test the antibody against recombinant YCR049C protein, yeast lysates from wild-type and YCR049C knockout strains, and perform peptide competition assays . Next, compare the detection limits of different methodologies—mass spectrometry may detect lower abundance proteins than Western blotting, while RNA-based methods measure transcript levels which may not correlate perfectly with protein levels due to post-transcriptional regulation. Consider whether post-translational modifications or protein degradation might affect epitope recognition by the antibody but not other detection methods. If using RNA-seq or RT-PCR for comparison, remember that mRNA and protein levels often show temporal differences due to translation rates and protein half-life. For conflicting localization results, different fixation methods may affect epitope accessibility or protein retention. To resolve such conflicts, employ orthogonal approaches—combine antibody-based methods with genetic tagging (GFP fusion) or MS-based techniques like SILAC. Document all experimental conditions thoroughly, as seemingly minor differences in sample preparation, cell growth phase, or detection protocols can significantly impact results .

YCR049C Antibody Specifications Table

Recommended Antibody Dilutions for Common Applications

Troubleshooting Guide for Common Issues with YCR049C Antibody