The YMR102C antibody targets the protein product of the YMR102C gene in Saccharomyces cerevisiae, which has been renamed LAF1 (Lam2/Ltc4-Associated Factor) based on functional studies . This antibody is primarily used to investigate the role of LAF1 in membrane contact site (MCS) dynamics, sterol transport, and TORC2 signaling pathways.
MCS Regulation: LAF1 interacts with Lam2 and Lam4 proteins at ER-plasma membrane (ER-PM) contact sites, facilitating sterol transport and maintaining membrane homeostasis .
TORC2 Signaling: LAF1 mediates phosphorylation of Ypk1 by TORC2, linking sterol metabolism to sphingolipid biosynthesis .
Phosphorylation Studies: The antibody is used alongside phosphospecific probes (e.g., α-phospho-Ypk1(T662)) to detect TORC2-mediated phosphorylation in Δlaf1 mutant cells. Results show a 1.5–2.0-fold increase in Ypk1 phosphorylation compared to wild-type cells .
Myriocin Resistance Assays: Cells lacking LAF1 exhibit enhanced resistance to myriocin (a sphingolipid biosynthesis inhibitor), indicating compensatory activation of sphingolipid pathways .
Co-IP and Western Blotting: LAF1 interacts with Lam2 and Lam4 via WD40 repeat domains, as confirmed by co-immunoprecipitation assays . The antibody is critical for validating these interactions in native and mutant backgrounds.
Sample Preparation: Cells are lysed using NaOH/β-mercaptoethanol, and proteins resolved via SDS-PAGE (8% gel).
Detection: Membranes probed with α-HA (1:5,000), α-G6PDH (1:100,000), and α-phospho-Ypk1(T662) (1:20,000) antibodies. Signal quantified using ImageQuant software .
Strain Backgrounds: Δlaf1 and Δlam1Δsip3 mutants are used to study redundancy and genetic interactions. TORC2 activation is observed in single deletions but not double mutants .
YMR102C refers to a specific open reading frame in the Saccharomyces cerevisiae genome. While detailed functional characterization is still ongoing, researchers use antibodies against this protein to investigate its expression, localization, and potential role in yeast cellular processes. The antibody enables detection and quantification of the protein in experimental settings using techniques such as Western blotting and ELISA .
Current validated applications for YMR102C antibody include:
Western blotting (WB) for protein detection in denatured samples
Enzyme-linked immunosorbent assay (ELISA) for quantitative detection
These applications have been confirmed to provide specific identification of the antigen in appropriate sample preparations .
For optimal antibody performance:
Store at -20°C or -80°C upon receipt
Avoid repeated freeze-thaw cycles that can compromise antibody integrity
The antibody is typically provided in a storage buffer containing 50% glycerol, 0.01M PBS (pH 7.4), and 0.03% Proclin 300 as a preservative
For frequent use, consider preparing small working aliquots to prevent repeated thawing of the stock
To achieve reliable results when using YMR102C antibody for Western blot analysis:
Sample preparation:
Extract yeast proteins using established protocols that maintain protein integrity
Include protease inhibitors to prevent degradation
Ensure complete denaturation of samples if using reducing conditions
Electrophoresis and transfer:
Use PVDF membrane for optimal protein retention
Include positive controls from validated S. cerevisiae strains
Include size markers to confirm target protein molecular weight
Antibody incubation:
For rigorous experimental design, include:
Positive control:
Wild-type S. cerevisiae (strain ATCC 204508/S288c) extract
Recombinant YMR102C protein (if available)
Negative controls:
For quantitative detection of YMR102C using ELISA:
Assay development:
Determine optimal coating concentration of capture antibody or antigen
Establish appropriate blocking conditions (typically 1-5% BSA or non-fat milk)
Perform antibody titration to determine optimal working dilution
Quantification strategy:
While immunofluorescence is not listed among validated applications, researchers might adapt the antibody for localization studies:
Cell fixation considerations:
Test different fixation methods (formaldehyde, methanol) to preserve epitope accessibility
Optimize spheroplast preparation to maintain cellular architecture while allowing antibody access
Validation approaches:
Include YMR102C-GFP fusion strains as positive controls if available
Use organelle-specific markers for co-localization studies
Compare results with published localization data from high-throughput studies
Technical considerations:
For protein interaction studies:
Buffer optimization:
Test different lysis conditions to preserve native protein complexes
Consider crosslinking approaches for transient interactions
Include appropriate protease and phosphatase inhibitors
Experimental design:
Pre-clear lysates to reduce non-specific binding
Include IgG control precipitations to identify non-specific interactions
Verify precipitation efficiency by immunoblotting input, unbound, and precipitated fractions
Validation strategies:
Based on studies of yeast mitochondrial proteins:
Subcellular fractionation approach:
Isolate highly purified mitochondria using established protocols
Use protease protection assays to determine topology of mitochondrial proteins
Examine protein levels in different mitochondrial subcompartments
Import kinetics:
Perform in vitro import assays using isolated mitochondria
Use the antibody to detect newly imported protein
Compare import efficiency under different conditions
Interaction with import machinery:
When facing detection challenges:
Sample preparation assessment:
Verify protein extraction efficiency
Ensure sample is not degraded (check housekeeping proteins)
Consider enrichment methods for low-abundance proteins
Antibody optimization:
Increase antibody concentration
Extend primary antibody incubation time (overnight at 4°C)
Test different blocking agents to reduce background
Enhance signal using more sensitive detection systems
Technical considerations:
To improve signal-to-noise ratio:
Blocking optimization:
Test different blocking agents (BSA, non-fat milk, commercial blockers)
Increase blocking time or concentration
Add blocking agent to antibody dilution buffer
Washing optimization:
Increase number and duration of wash steps
Test different detergent concentrations in wash buffer
Consider more stringent washing conditions (higher salt, detergent)
Antibody considerations:
When facing discrepancies:
Biological explanations:
Post-transcriptional regulation can cause mRNA and protein levels to differ
Protein stability and turnover rates may vary under different conditions
Subcellular localization changes might affect extraction efficiency
Methodological considerations:
Verify antibody specificity under your experimental conditions
Ensure appropriate normalization for both protein and mRNA quantification
Consider time-course experiments to detect delayed correlation
Validation approaches:
Common specifications for YMR102C antibody include:
| Characteristic | Specification |
|---|---|
| Host species | Rabbit |
| Clonality | Polyclonal |
| Immunogen | Recombinant YMR102C protein from S. cerevisiae (strain ATCC 204508 / S288c) |
| Isotype | IgG |
| Purification | Antigen affinity purified |
| Validated applications | ELISA, Western blot |
| Formulation | Liquid; 50% Glycerol, 0.01M PBS, pH 7.4, 0.03% Proclin 300 |
| Species reactivity | Saccharomyces cerevisiae (strain ATCC 204508 / S288c) |
| Lead time | Made-to-order (14-16 weeks) |
| Recommended use | Research applications only |
This information is essential for selecting the appropriate antibody for specific research applications .
For lot-to-lot consistency validation:
Performance comparison:
Test new and previous lots side-by-side under identical conditions
Compare signal intensity, specificity, and background levels
Verify recognition of the same bands/epitopes
Titration analysis:
Determine optimal working concentration for the new lot
Generate standard curves if using for quantitative applications
Document any differences in sensitivity
Application-specific validation:
For comprehensive protein analysis:
Antibody-based validation of proteomic findings:
Confirm mass spectrometry-identified changes in YMR102C levels
Validate protein interactions discovered through proteomic approaches
Provide orthogonal confirmation of post-translational modifications
Sample enrichment:
Use the antibody for immunoprecipitation prior to mass spectrometry
Enrich for low-abundance interactions
Focus analysis on specific protein complexes
Targeted proteomics:
When working with mutant strains:
Strain-specific factors:
Consider genetic background effects on expression
Account for potential compensatory mechanisms in deletion/overexpression strains
Verify strain genotype before experimental interpretation
Experimental design:
Include appropriate wild-type controls matched to strain background
Consider complementation studies to confirm phenotype specificity
Examine multiple independent clones to account for clone-specific effects
Data interpretation:
While direct connections are not established in the provided search results:
Potential relevance to mitochondrial biology:
Yeast mitochondrial research often uses antibodies to study protein localization and import
Inner membrane translocases like Oxa1 and Cox18 play crucial roles in mitochondrial protein topogenesis
Studies of YMR102C might reveal interactions with these pathways
Experimental approaches:
Mitochondrial isolation followed by Western blotting to determine localization
Protease protection assays can determine membrane topology
Co-immunoprecipitation can identify interactions with known mitochondrial components
Relation to published findings:
Innovative approaches for expanded utility:
Advanced imaging techniques:
Super-resolution microscopy for precise localization studies
Live-cell imaging using cell-permeable antibody fragments
Correlative light-electron microscopy for ultrastructural analysis
Single-cell applications:
Flow cytometry with fixed and permeabilized yeast cells
Mass cytometry (CyTOF) for multiplexed protein detection
Microfluidic approaches for temporal analysis of protein expression
Proximity-based methods:
For stress biology investigations:
Expression analysis:
Monitor YMR102C protein levels under various stressors (oxidative, heat, osmotic)
Compare acute vs. chronic stress responses
Examine recovery phases after stress removal
Localization changes:
Investigate potential stress-induced changes in protein localization
Study association with stress-responsive organelles or structures
Examine co-localization with known stress response factors
Integration with systems approaches:
For enhanced quantification:
Improved detection methods:
Develop sandwich ELISA using multiple epitope-specific antibodies
Explore fluorescence-based quantification methods for increased sensitivity
Consider automated Western blot systems for improved reproducibility
Reference standards:
Develop calibrated recombinant protein standards
Identify optimal normalization controls for different experimental conditions
Create standardized protocols for cross-laboratory comparison
Data analysis approaches: