YNL165W Antibody

What is YNL165W and why is it studied in yeast research?

YNL165W is a gene/protein in Saccharomyces cerevisiae (Baker's yeast) with UniProt accession number P53891 . Yeast serves as an important model organism in molecular biology and genetics research due to its eukaryotic cellular organization, relatively simple genetic structure, and ease of manipulation. Studying YNL165W contributes to our understanding of fundamental cellular processes that may have implications for human biology, given the evolutionary conservation of many cellular mechanisms across eukaryotes. Antibodies against YNL165W are valuable tools for detecting and studying this protein in experimental settings .

What applications are YNL165W antibodies validated for?

YNL165W antibodies have been validated specifically for Enzyme-Linked Immunosorbent Assay (ELISA) and Western Blot (WB) applications . These techniques are fundamental in protein research, allowing for the detection, quantification, and characterization of the YNL165W protein. ELISA provides quantitative measurement of the protein in solution, while Western Blot allows visualization of the protein after separation by gel electrophoresis, providing information about protein size, expression levels, and post-translational modifications.

How should YNL165W antibody be stored and handled to maintain efficacy?

For optimal preservation of antibody activity, YNL165W antibody should be stored at -20°C or -80°C upon receipt . It's crucial to avoid repeated freeze-thaw cycles as these can degrade the antibody and reduce its effectiveness. The antibody is supplied in a buffer containing 50% glycerol, which helps prevent freezing damage at -20°C. For short-term use (within a week), aliquots can be stored at 4°C. When handling the antibody, maintain aseptic conditions and use sterile pipette tips to prevent contamination. Always centrifuge the vial briefly before opening to ensure the antibody solution is at the bottom of the tube .

What is the specificity of polyclonal YNL165W antibodies?

Polyclonal YNL165W antibodies recognize multiple epitopes on the YNL165W protein, which is advantageous for detection applications as it increases sensitivity. These antibodies are generated by immunizing rabbits with recombinant YNL165W protein from Saccharomyces cerevisiae (strain ATCC 204508 / S288c) . The antibodies undergo affinity purification to enhance specificity for the target protein . While this process increases specificity, researchers should always validate the antibody in their specific experimental conditions, as cross-reactivity with structurally similar proteins may occur.

How can I optimize Western Blot protocols specifically for YNL165W detection?

Optimizing Western Blot protocols for YNL165W detection requires attention to several parameters. First, consider sample preparation: effective yeast cell lysis is critical and may require mechanical disruption (e.g., glass beads) combined with detergent-based buffers containing protease inhibitors. For gel electrophoresis, 10-12% polyacrylamide gels typically provide good resolution for most yeast proteins. When transferring to membranes, PVDF membranes may offer better protein retention than nitrocellulose for some applications.

For antibody incubation, start with a 1:1000 dilution in 5% non-fat milk or BSA in TBST, but optimize this concentration empirically. Extended primary antibody incubation (overnight at 4°C) may improve signal quality. For detection, both chemiluminescence and fluorescence-based methods are suitable, with the latter offering better quantification capabilities. Always include appropriate controls: positive controls (purified recombinant YNL165W), negative controls (extracts from YNL165W deletion strains), and loading controls (housekeeping proteins like actin) .

What approaches can be used to validate YNL165W antibody specificity in yeast strains?

Validating antibody specificity is crucial for reliable research outcomes. Multiple complementary approaches should be employed. First, perform parallel Western Blots with wild-type yeast and YNL165W knockout strains—the antibody should detect a band of the expected molecular weight only in wild-type samples. Second, conduct peptide competition assays by pre-incubating the antibody with excess purified YNL165W protein prior to immunodetection; this should abolish or significantly reduce signal intensity.

Third, use orthogonal detection methods such as mass spectrometry to confirm the identity of immunoprecipitated proteins. Fourth, perform immunofluorescence microscopy on wild-type and knockout strains to verify expected subcellular localization patterns. Finally, if possible, use multiple antibodies targeting different epitopes of YNL165W and compare their detection patterns. This multi-faceted validation approach ensures confidence in antibody specificity and experimental results .

How might post-translational modifications of YNL165W affect antibody recognition?

Post-translational modifications (PTMs) can significantly impact antibody recognition of YNL165W. Phosphorylation, ubiquitination, sumoylation, and glycosylation can alter protein conformation or directly mask epitopes, potentially reducing antibody binding affinity. If YNL165W undergoes conditional PTMs (e.g., phosphorylation during specific cell cycle phases or stress responses), antibody detection efficiency may vary depending on cellular conditions.

To address this challenge, researchers can use phosphatase treatment of samples prior to immunoblotting to remove phosphorylation, or use deglycosylation enzymes if glycosylation is suspected. Additionally, comparison of detection patterns across different physiological conditions may reveal modification-dependent recognition. For comprehensive analysis, researchers might consider using multiple antibodies raised against different regions of YNL165W to ensure detection regardless of modification status. Mass spectrometry analysis can also help identify specific modifications that might interfere with antibody binding .

What considerations are important when using YNL165W antibody for co-immunoprecipitation experiments?

Co-immunoprecipitation (Co-IP) with YNL165W antibody requires careful optimization to preserve protein-protein interactions while achieving efficient target capture. First, lysis buffer composition is critical—use gentle, non-ionic detergents (e.g., 0.5% NP-40 or 1% Triton X-100) and physiological salt concentrations (120-150mM NaCl) to maintain interactions. Include protease inhibitors to prevent degradation and phosphatase inhibitors if phosphorylation-dependent interactions are relevant.

The antibody-to-lysate ratio must be optimized empirically, typically starting with 2-5μg antibody per 500μg protein lysate. Pre-clearing lysates with protein A/G beads can reduce non-specific binding. Consider crosslinking the antibody to beads to prevent antibody co-elution with the target. For elution, gentle conditions (competitive elution with peptides) may better preserve interactions than harsh denaturing conditions. Always include negative controls (non-specific IgG or YNL165W-knockout lysates) to identify false positives. Validation of potential interacting partners should be performed by reciprocal Co-IP or alternative techniques like proximity labeling .

How can I address weak or absent signal when using YNL165W antibody in immunoblotting?

When encountering weak or absent signals with YNL165W antibody in immunoblotting, a systematic troubleshooting approach is necessary. First, verify protein transfer efficiency using reversible staining methods like Ponceau S. Increase protein loading amount—yeast proteins often require higher loading (40-60μg) for detection compared to mammalian samples. Try reducing antibody dilution (e.g., from 1:1000 to 1:500) or extending incubation time to overnight at 4°C.

Optimize blocking conditions; excessive blocking can mask epitopes—try different blocking agents (milk vs. BSA) and concentrations (3-5%). For enhanced detection, consider using high-sensitivity substrates or signal amplification systems. If these steps don't improve results, protein extraction method may be inadequate—yeast cells have tough cell walls requiring aggressive lysis methods (e.g., mechanical disruption with glass beads). Certain buffer components may also interfere with antibody binding, so try alternative buffer compositions. Finally, consider that the target protein may be naturally expressed at low levels or under specific conditions—try enrichment by immunoprecipitation before detection .

What factors should be considered when optimizing immunoprecipitation protocols with YNL165W antibody?

Successful immunoprecipitation with YNL165W antibody depends on multiple factors. First, antibody amount is critical—titrate from 1-10μg per reaction to find the optimal concentration. The choice between protein A, G, or A/G beads matters; for rabbit polyclonal antibodies like YNL165W antibody, protein A beads typically provide better binding .

Lysis buffer composition dramatically affects results—start with standard buffers (e.g., RIPA or NP-40) and modify as needed; include protease inhibitors to prevent degradation. Incubation conditions affect binding efficiency—try both short (2 hours) and long (overnight) incubations at 4°C with gentle rotation. Pre-clearing lysates with beads alone can reduce background. For elution, compare gentle (non-denaturing) and harsh (denaturing) conditions based on downstream applications.

Importantly, yeast cell wall disruption requires special attention—consider spheroplasting or mechanical disruption methods. Cross-contamination with the heavy chain (~50kDa) can interfere with detection; use non-reducing conditions, HRP-conjugated protein A/G, or light-chain specific secondary antibodies to mitigate this issue. Always include appropriate controls, including non-specific IgG and YNL165W-deficient strains .

How can YNL165W antibody be effectively used in combination with genetic manipulation techniques in yeast?

Integrating YNL165W antibody detection with genetic manipulation provides powerful research approaches. For tagged protein studies, consider the tag position carefully—C-terminal tags may be preferable if N-terminal epitopes are critical for antibody recognition. Validate that the tag doesn't interfere with antibody binding by comparing detection of tagged and untagged proteins. When working with deletion strains, the antibody can confirm complete knockout by showing absence of signal .

For temperature-sensitive or conditional mutants, the antibody can monitor protein levels under permissive and restrictive conditions. In complementation studies, use the antibody to verify expression levels of reintroduced wild-type or mutant variants. For overexpression systems, the antibody can quantify expression levels for correlation with phenotypic effects.

When integrating with CRISPR-Cas9 genome editing, the antibody can validate successful modification by detecting altered protein size or absence. With these approaches, appropriate controls are essential: wild-type strains as positive controls, deletion strains as negative controls, and loading controls to normalize expression levels across samples .

What considerations are important when using YNL165W antibody across different yeast species or strains?

When applying YNL165W antibody across different yeast species or strains, several factors require attention. First, sequence conservation is paramount—the antibody was raised against S. cerevisiae strain ATCC 204508/S288c YNL165W protein , so target protein homology in other strains or species determines cross-reactivity. Perform sequence alignment analysis to predict recognition potential.

Protein expression levels vary significantly between laboratory strains (e.g., S288c vs. W303), industrial strains, and wild isolates, necessitating loading adjustments. Cell wall composition differences between species affects protein extraction efficiency—optimize lysis protocols for each species. Post-translational modifications may differ between strains under identical conditions, potentially affecting epitope availability.

When testing new strains, include positive controls (confirmed reactive strains) alongside experimental samples. Consider epitope tagging the protein of interest in non-standard strains if antibody reactivity is poor. For quantitative comparisons between strains, use housekeeping proteins as normalization controls, but verify their consistent expression across the strains being compared .