YMR102C Antibody

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Description

Overview of YMR102C Antibody

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.

Key Functions of LAF1

  • 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 .

2.1. TORC2 Signaling Analysis

  • 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 .

2.2. Protein-Protein Interaction Studies

  • 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.

Experimental MethodKey FindingSource
Ypk1 phosphorylation assayIncreased phosphorylation in Δlaf1 cells
Co-IP with Lam2/Lam4Direct interaction confirmed
Myriocin resistance testEnhanced resistance in Δlaf1 cells

3.1. Western Blotting Protocol

  • 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 .

3.2. Genetic Deletion Analysis

  • 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 .

Clinical and Biotechnological Relevance

  • Antimalarial Resistance: LAF1 homologs in Plasmodium falciparum are implicated in resistance to imidazolopiperazine compounds, suggesting conserved mechanisms .

  • Cancer Research: TORC2-Ypk1 signaling is a therapeutic target in oncology, with LAF1 potentially modulating pathway activity .

Product Specs

Buffer
Preservative: 0.03% Proclin 300
Composition: 50% Glycerol, 0.01M PBS, pH 7.4
Form
Liquid
Lead Time
Made-to-order (14-16 weeks)
Synonyms
YMR102C antibody; YM6228.01C antibody; YM6543.09C antibody; YM9718.01C antibody; WD repeat-containing protein YMR102C antibody
Target Names
YMR102C
Uniprot No.

Q&A

What is YMR102C protein and why is it studied in yeast research?

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 .

What are the validated applications for commercially available YMR102C antibodies?

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 .

What are the critical storage requirements for maintaining YMR102C antibody activity?

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

How should I design optimal Western blot experiments using YMR102C antibody?

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:

    • Optimize antibody dilution (typically start with manufacturer's recommendation)

    • Ensure adequate blocking to minimize non-specific binding

    • Use appropriate HRP-conjugated secondary antibody specific to rabbit IgG

What control samples are essential when working with YMR102C antibody?

For rigorous experimental design, include:

  • Positive control:

    • Wild-type S. cerevisiae (strain ATCC 204508/S288c) extract

    • Recombinant YMR102C protein (if available)

  • Negative controls:

    • YMR102C deletion mutant (if available)

    • Non-target yeast species to confirm specificity

    • Primary antibody omission control to assess secondary antibody specificity

How can I optimize ELISA protocols for YMR102C detection?

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:

    • Develop standard curve using purified recombinant protein if available

    • Include technical replicates (minimum triplicate)

    • Normalize results to total protein concentration

    • Include proper negative controls to establish assay specificity

How can I use YMR102C antibody to study protein localization in yeast cells?

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:

    • Test multiple antibody concentrations and incubation conditions

    • Include peptide competition controls to verify specificity

    • Consider detergent optimization for permeabilization

What considerations should I make when using YMR102C antibody in co-immunoprecipitation experiments?

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:

    • Confirm interactions with reverse co-IP where possible

    • Consider alternative approaches (yeast two-hybrid, proximity labeling) for validation

    • Examine published interaction datasets for corroborating evidence

How can YMR102C antibody be used in investigating mitochondrial protein import pathways?

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:

    • Investigate association with known import components (e.g., translocases)

    • Examine if YMR102C associates with mitochondrial inner membrane complexes

    • Consider if YMR102C might interact with Oxa1 or Cox18 pathway components

How should I troubleshoot weak or absent signal when using YMR102C antibody in Western blots?

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:

    • Verify transfer efficiency using reversible staining

    • Check expiration date and storage conditions of antibody

    • Consider that experimental conditions might affect protein expression levels

How can I resolve high background issues when working with YMR102C antibody?

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:

    • Decrease primary and secondary antibody concentrations

    • Pre-absorb antibody with non-specific proteins

    • Filter antibody solution to remove aggregates

How should I analyze contradictory results between YMR102C protein levels and gene expression data?

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:

    • Use orthogonal methods to confirm protein levels

    • Consider targeted proteomics approaches for quantification

    • Examine published datasets for similar observations

What are the key characteristics of commercially available YMR102C antibodies?

Common specifications for YMR102C antibody include:

CharacteristicSpecification
Host speciesRabbit
ClonalityPolyclonal
ImmunogenRecombinant YMR102C protein from S. cerevisiae (strain ATCC 204508 / S288c)
IsotypeIgG
PurificationAntigen affinity purified
Validated applicationsELISA, Western blot
FormulationLiquid; 50% Glycerol, 0.01M PBS, pH 7.4, 0.03% Proclin 300
Species reactivitySaccharomyces cerevisiae (strain ATCC 204508 / S288c)
Lead timeMade-to-order (14-16 weeks)
Recommended useResearch applications only

This information is essential for selecting the appropriate antibody for specific research applications .

What factors should be considered when validating a new lot of YMR102C antibody?

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:

    • Confirm performance in all intended applications

    • Verify specificity using appropriate controls

    • Document lot-specific optimal conditions for laboratory records

How can YMR102C antibody be integrated with proteomic approaches?

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:

    • Develop selected reaction monitoring (SRM) assays based on antibody-validated epitopes

    • Combine antibody-based detection with mass spectrometry for multiplexed analysis

    • Use antibody data to inform proteomic experimental design

What considerations should be made when interpreting YMR102C protein levels in genetically modified yeast strains?

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:

    • Normalize to appropriate housekeeping proteins for the specific genetic background

    • Consider pathway analysis to understand indirect effects

    • Integrate with other molecular data (transcriptomics, metabolomics) for comprehensive understanding

How does YMR102C research relate to studies of mitochondrial protein translocation in yeast?

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:

    • Researchers studying mitochondrial proteins use techniques like those described for Fox protein studies

    • Methods for studying membrane protein insertion could be applied to YMR102C if it has membrane associations

What emerging technologies could enhance YMR102C antibody applications?

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:

    • BioID or APEX2 proximity labeling to identify protein neighbors

    • Split-protein complementation assays to study dynamic interactions

    • FRET-based approaches to examine protein-protein interactions in live cells

How can YMR102C antibody be used to study yeast stress responses?

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:

    • Correlate protein-level changes with transcriptomic alterations

    • Examine changes in protein-protein interactions under stress

    • Consider metabolic adaptations that might be connected to YMR102C function

What methodological advances could improve quantitative analysis of YMR102C in complex samples?

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:

    • Implement rigorous statistical methods for quantification

    • Use image analysis software optimized for densitometry

    • Develop methods to account for non-linear detection ranges

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