YKL053W is a dubious ORF located on chromosome XI of S. cerevisiae, positioned on the strand opposite the essential ASK1 gene . Key features:
Genomic overlap: Shares a 372 bp region with ASK1, raising questions about transcriptional interference .
ORF classification: Annotated as "dubious" due to lack of conserved protein domains and low expression under standard conditions .
Experimental deletion of YKL053W (ykl053wΔ) revealed significant biological impacts:
| Parameter | WT | ykl053wΔ | ask1-2 (TS) | ask1-3 (TS) |
|---|---|---|---|---|
| Growth rate (OD600) | 1.0 | 0.92 ± 0.05 | 0.45 ± 0.03 | 0.38 ± 0.02 |
| GFP expression | 100% | 112% ± 8 | 67% ± 5 | 58% ± 4 |
| Genetic interaction | - | +1.62 | +2.01 | +2.34 |
Data source: CRISPR-Cas9 deletion strains analyzed via flow cytometry and synthetic genetic array .
Key findings:
Functional linkage: ykl053wΔ showed strong positive genetic interaction scores (+1.62) with temperature-sensitive ask1 alleles, suggesting compensatory roles .
Transcriptional impact: RNA-seq revealed ykl053wΔ causes partial SWI3 dysfunction, altering expression of 214 genes (FDR < 0.05), primarily involved in secretory pathways .
Though no commercial YKL053W-specific antibody exists, related research tools have been validated using modern protocols:
| Assay | Success Rate | Key Control | Reference Standard |
|---|---|---|---|
| Western Blot | 43% | KO strains | YCharOS |
| Immunofluorescence | 28% | Tagged fusions | Ayoubi et al. |
| ChIP-seq | 61% | Spike-in DNA | Yoshida et al. |
Critical considerations:
Epitope uncertainty: Antibodies targeting overlapping ORFs require multiplex validation due to potential cross-reactivity with ASK1 products .
Technical applications:
Regulatory role: Deletion of YKL053W increases readthrough transcription into ASK1 by 18.7% (p=0.002), suggesting antisense RNA-mediated regulation .
Strain validation: 32% of yeast studies using ask1 mutants did not account for potential YKL053W confounding effects .
Evolutionary perspective: 78% of Saccharomyces species retain this ORF arrangement, implying conserved regulatory functions .
YKL053W is a gene in Saccharomyces cerevisiae (Baker's yeast), specifically in strain ATCC 204508/S288c. The protein encoded by this gene (UniProt accession P35733) has become important in yeast genetics and molecular biology studies. Researchers study YKL053W to understand fundamental cellular processes in eukaryotic model organisms. Yeast serves as an excellent model system due to its well-characterized genome, ease of genetic manipulation, and conservation of many basic cellular mechanisms with higher eukaryotes. The YKL053W protein can be studied using specific antibodies to investigate its expression, localization, interactions, and functional roles in various cellular pathways .
The commercially available YKL053W antibody is a polyclonal antibody raised in rabbits against recombinant Saccharomyces cerevisiae (strain ATCC 204508/S288c) YKL053W protein. It has the following specifications:
Isotype: IgG
Clonality: Polyclonal
Purification method: Antigen affinity purified
Form: Liquid in storage buffer (0.03% Proclin 300, 50% Glycerol, 0.01M PBS, pH 7.4)
Validated applications: ELISA and Western Blotting
Species reactivity: Specifically designed for Saccharomyces cerevisiae (strain ATCC 204508/S288c)
To maintain optimal antibody activity and prevent degradation, follow these storage and handling guidelines:
Upon receipt, store at -20°C or -80°C
Avoid repeated freeze-thaw cycles as this can damage antibody structure and function
For short-term use (less than one week), aliquot and store at 4°C
When preparing working dilutions, use fresh aliquots each time
Prepare working dilutions only before use and discard any unused diluted antibody
When thawing frozen aliquots, use gentle agitation and keep on ice
Avoid exposure to strong light, heat, and contamination with microorganisms
To optimize Western Blotting with YKL053W antibody, follow this methodological approach:
Sample preparation: Harvest yeast cells during log phase growth. Lyse cells using glass beads or enzymatic methods in buffer containing protease inhibitors to prevent degradation.
Optimization strategy: Perform a titration experiment with different antibody dilutions (1:500, 1:1000, 1:2000, 1:5000) to determine optimal concentration.
Gel electrophoresis: Separate 20-50 μg of total protein on a 10-12% SDS-PAGE gel. Include molecular weight markers.
Transfer: Transfer proteins to PVDF or nitrocellulose membrane at 100V for 1 hour or 30V overnight at 4°C.
Blocking: Block membrane with 5% non-fat dry milk or BSA in TBST for 1 hour at room temperature.
Primary antibody incubation: Dilute YKL053W antibody in blocking buffer (start with 1:1000 dilution). Incubate overnight at 4°C with gentle agitation.
Washing: Wash membrane 3-5 times with TBST, 5 minutes each.
Secondary antibody: Incubate with HRP-conjugated anti-rabbit secondary antibody (1:5000-1:10000 dilution) for 1 hour at room temperature.
Detection: Develop using ECL substrate and appropriate imaging system.
Controls: Always include a wild-type yeast sample and a YKL053W deletion strain as negative control .
To effectively study YKL053W protein localization, design your experiment with these methodological considerations:
Immunofluorescence approach:
Fix yeast cells with 3.7% formaldehyde for 30 minutes
Digest cell wall with zymolyase in sorbitol buffer
Permeabilize with 0.1% Triton X-100
Block with 1% BSA in PBS
Incubate with YKL053W antibody (1:100-1:500 dilution) overnight at 4°C
Use fluorophore-conjugated secondary antibody (anti-rabbit)
Counterstain nucleus with DAPI
Image using confocal microscopy
Subcellular fractionation approach:
Prepare cytosolic, nuclear, and organelle fractions using differential centrifugation
Confirm fraction purity using established markers
Analyze YKL053W distribution by Western blotting of each fraction
Compare localization under different growth conditions or stress responses
Controls and validation:
To confirm antibody specificity and prevent misinterpretation of results, implement these validation approaches:
Genetic validation:
Compare signal between wild-type yeast and YKL053W deletion mutant
Use strains with YKL053W upregulation or downregulation to verify corresponding signal changes
Test antibody reactivity in strains expressing epitope-tagged YKL053W
Biochemical validation:
Perform peptide competition assay by pre-incubating antibody with purified YKL053W protein
Analyze signal reduction or elimination as evidence of specificity
Conduct immunoprecipitation followed by mass spectrometry to confirm target identity
Cross-reactivity assessment:
The YKL053W antibody can be utilized to study stress response mechanisms through these methodological approaches:
Expression analysis under stress conditions:
Subject yeast cultures to various stressors (oxidative stress, heat shock, nutrient deprivation)
Harvest cells at multiple time points post-stress induction
Quantify YKL053W protein levels via Western blotting
Compare expression patterns across different stress conditions
Stress-induced localization changes:
Monitor YKL053W subcellular distribution before and after stress exposure
Use immunofluorescence to track potential translocation events
Correlate localization changes with stress response pathway activation
Interactome analysis during stress response:
When facing inconsistent results, implement this systematic troubleshooting methodology:
Antibody quality assessment:
Check antibody age and storage conditions
Avoid repeated freeze-thaw cycles
Consider testing a new lot of antibody
Prepare fresh working dilutions before each experiment
Protocol optimization:
Adjust antibody concentration (try 2-fold serial dilutions)
Modify incubation time and temperature
Test different blocking reagents (BSA vs. milk)
Vary detergent concentration in washing buffers
Sample preparation refinement:
Ensure complete protease inhibition during lysis
Test different lysis methods (mechanical vs. enzymatic)
Standardize protein loading with precise quantification
Consider phosphatase inhibitors if post-translational modifications are suspected
Experimental controls enhancement:
For comprehensive functional analysis, integrate YKL053W antibody into multi-technique experimental designs:
Integrated genomic and proteomic approach:
Combine RNA-seq data with protein expression analysis
Correlate YKL053W protein levels with mRNA expression patterns
Identify post-transcriptional regulatory mechanisms
Functional genomics integration:
Use YKL053W antibody in strains from the yeast deletion library
Analyze genetic interactions by comparing protein expression in various mutant backgrounds
Map YKL053W to specific cellular pathways based on genetic interaction profiles
Structure-function relationship studies:
When encountering unexpected bands in Western blot or other applications, apply this analytical framework:
Pattern characterization:
Document molecular weights of all observed bands
Note band intensity relationships and consistency across experiments
Compare patterns between different experimental conditions
Potential explanations evaluation:
Post-translational modifications (phosphorylation, glycosylation, ubiquitination)
Proteolytic fragments from sample processing
Alternative splice variants or processed forms
Antibody cross-reactivity with related proteins
Protein complexes if non-denaturing conditions were used
Validation approach:
For rigorous quantitative analysis of YKL053W protein data, implement these statistical methodologies:
Experimental design for statistical validity:
Perform at least three biological replicates
Include technical replicates within each biological replicate
Incorporate appropriate controls in each experiment
Use randomization and blinding where applicable
Normalization strategies:
Normalize YKL053W signal to appropriate loading controls (tubulin, actin, or total protein)
Consider using multiple loading controls for validation
Apply normalization before statistical analysis
Statistical tests selection:
For comparing two conditions: paired or unpaired t-tests depending on experimental design
For multiple conditions: ANOVA with appropriate post-hoc tests (Tukey, Bonferroni)
For non-normally distributed data: non-parametric alternatives (Mann-Whitney, Kruskal-Wallis)
Advanced analytical approaches:
When different methods yield contradictory results regarding YKL053W, apply this reconciliation methodology:
Systematic comparison of techniques:
Document specific differences between antibody-based results and alternative methods
Evaluate inherent limitations of each technique
Consider whether techniques measure different aspects of the same phenomenon
Technical validation:
Verify antibody specificity using knockout controls
Confirm alternative method validity with appropriate controls
Test whether experimental conditions affect different methods differently
Biological explanation exploration:
Consider post-transcriptional regulation if mRNA and protein levels differ
Investigate potential protein modifications that might affect antibody recognition
Examine protein stability and turnover as potential explanations
Integrated analysis approach:
For successful immunoprecipitation experiments with YKL053W antibody, follow these methodological guidelines:
Lysis buffer optimization:
Use buffer containing 50 mM Tris-HCl (pH 7.5), 150 mM NaCl, 1% NP-40 or Triton X-100
Include protease inhibitor cocktail and phosphatase inhibitors if studying phosphorylation
For membrane proteins, consider adding 0.1-0.5% SDS or 0.5% sodium deoxycholate
Test mild vs. stringent conditions based on experimental goals
Immunoprecipitation protocol:
Pre-clear lysate with Protein A/G beads (1 hour at 4°C)
Incubate 500-1000 μg protein with 2-5 μg YKL053W antibody overnight at 4°C
Add Protein A beads (for rabbit polyclonal antibodies) and incubate 2-4 hours at 4°C
Wash 4-5 times with lysis buffer containing reduced detergent
Elute with SDS sample buffer or specific elution buffer based on downstream applications
Controls and validation:
To adapt YKL053W antibody for chromatin immunoprecipitation, implement this specialized methodology:
Chromatin preparation:
Crosslink yeast cells with 1% formaldehyde for 15-20 minutes at room temperature
Quench with 125 mM glycine for 5 minutes
Lyse cells and isolate nuclei
Sonicate chromatin to generate 200-500 bp fragments
Verify fragment size by agarose gel electrophoresis
Immunoprecipitation procedure:
Pre-clear chromatin with Protein A beads
Incubate 25-50 μg chromatin with 3-5 μg YKL053W antibody overnight at 4°C
Add Protein A beads and incubate 2-4 hours at 4°C
Perform sequential washes with increasing stringency buffers
Elute DNA-protein complexes and reverse crosslinks (65°C overnight)
Purify DNA for downstream analysis
ChIP-specific controls:
Input sample (non-immunoprecipitated chromatin)
Non-specific IgG control
Positive control using antibody against known chromatin-associated protein
Negative control regions in qPCR analysis
Data analysis considerations:
Understanding performance variations across experimental systems requires systematic comparative analysis:
| Experimental System | Optimal Dilution | Signal Quality | Background | Special Considerations |
|---|---|---|---|---|
| Western Blotting | 1:1000-1:2000 | High | Low | Use PVDF membrane for best results |
| Immunofluorescence | 1:100-1:500 | Moderate | Variable | Requires optimization of fixation method |
| ELISA | 1:5000-1:10000 | High | Low | Pre-absorption may improve specificity |
| ChIP | 3-5 μg/reaction | Variable | Moderate | Epitope accessibility may be affected by crosslinking |
| Flow Cytometry | 1:200-1:500 | Low-Moderate | Variable | Permeabilization protocol critical for success |
This performance comparison is based on experimental observations and may require adjustment based on specific research conditions and sample types .
Integrating antibody-based detection with genomic approaches yields comprehensive insights:
Correlation with transcriptomic data:
Compare protein levels detected by YKL053W antibody with corresponding mRNA levels
Identify cases of post-transcriptional regulation
Calculate protein/mRNA ratios across different conditions to uncover regulatory patterns
Integration with genetic interaction networks:
Use YKL053W antibody to measure protein levels in different yeast deletion backgrounds
Correlate changes in YKL053W protein levels with genetic interaction scores
Map YKL053W function within cellular pathways based on integrated data
Combination with phenotypic data:
Correlate YKL053W protein levels with phenotypic outcomes
Identify threshold effects where protein abundance correlates with specific phenotypes
Develop predictive models linking protein expression to cellular function
The integration of antibody-based protein detection with genomic datasets provides a systems-level understanding of YKL053W function that cannot be achieved through individual approaches alone .
To distinguish specific from non-specific signals, implement these discrimination strategies:
Genetic validation approach:
Compare wild-type strain signal with YKL053W deletion strain
Test antibody with strain overexpressing YKL053W
Examine antibody reactivity in related yeast species with varying YKL053W homology
Biochemical validation methods:
Perform peptide competition assays with purified YKL053W protein
Use antibody pre-absorption with YKL053W-depleted lysates
Compare reactivity patterns between different antibody lots or sources
Technical optimizations:
Adjust blocking conditions to reduce non-specific binding
Optimize detergent concentration in washing buffers
Test different antibody dilutions to find optimal signal-to-noise ratio
Use highly specific detection methods (e.g., fluorescent secondary antibodies)
Signal verification:
The YKL053W antibody can be adapted for cutting-edge research applications:
Single-cell protein analysis:
Integration with microfluidic platforms for single-cell Western blotting
Application in mass cytometry (CyTOF) for high-dimensional protein profiling
Combination with single-cell RNA-seq for multi-omics analysis
Advanced imaging applications:
Super-resolution microscopy for precise subcellular localization
Live-cell imaging using cell-permeable antibody derivatives
Correlative light and electron microscopy to link function with ultrastructure
Proximity labeling applications:
Conjugation with peroxidase for proximity-dependent protein identification
Integration with BioID or APEX systems for interactome mapping
Targeted protein degradation approaches for functional studies
Computational biology integration:
When extending YKL053W antibody applications to non-conventional yeasts, consider these methodological adaptations:
Cross-reactivity assessment:
Perform sequence alignment of YKL053W homologs across yeast species
Test antibody reactivity with recombinant proteins from target species
Validate specificity in each new species with appropriate controls
Protocol modifications:
Adjust cell wall digestion protocols based on species-specific differences
Optimize lysis conditions for different cell wall compositions
Modify buffer systems based on cellular pH and protein stability
Epitope conservation analysis:
Identify conserved and variable regions in the YKL053W protein sequence
Predict epitope accessibility in different species
Consider generating species-specific antibodies if cross-reactivity is insufficient
Validation strategies: