The SPCC594.03 Antibody (Catalog No. CSB-PA529189XA01SXV) is a polyclonal antibody specifically designed for research applications targeting the O74506 protein in Schizosaccharomyces pombe (fission yeast). This antibody is part of a broader portfolio of fission yeast-specific antibodies developed for studying cellular processes, protein localization, and functional analysis in yeast models .
The antibody recognizes a protein encoded by the SPCC594.03 gene in S. pombe. While detailed functional annotations for this gene are not explicitly provided in the available sources, its predicted role aligns with conserved yeast proteins involved in cellular homeostasis or metabolic regulation. Proteins in this category often participate in stress response pathways, mitochondrial function, or cytoskeleton organization, as inferred from homology with characterized yeast orthologs .
The antibody is validated for:
Western Blot (WB): Detects a single band corresponding to the O74506 protein in lysates of S. pombe cells .
Immunofluorescence (IF): Localizes the target protein to subcellular compartments, likely cytoplasmic or mitochondrial based on yeast protein localization patterns .
Potential Use in IP: While not explicitly tested, polyclonal antibodies like this are often suitable for immunoprecipitation (IP) to isolate protein complexes .
The antibody undergoes rigorous quality control, including:
Target-specific validation: Tested against lysates of S. pombe to ensure no cross-reactivity with non-target proteins .
Species specificity: Designed exclusively for S. pombe (strain 972/ATCC 24843), minimizing cross-reactivity with other yeasts or eukaryotes .
This antibody contributes to studies of yeast cellular biology, complementing tools like the Antibody Validation Database (e.g., Figure 1 in ) and PLAbDab (a repository of antibody sequences and structures) . While SPCC594.03 is not listed in these databases, its design aligns with best practices for antibody validation, including knockout (KO) cell line testing and epitope mapping .
SPCC594.03 Antibody (catalog number CSB-PA529189XA01SXV) is a polyclonal antibody specifically designed for research applications targeting the O74506 protein encoded by the SPCC594.03 gene in Schizosaccharomyces pombe (fission yeast strain 972/ATCC 24843). The antibody recognizes epitopes on this protein, which is believed to be involved in cellular homeostasis or metabolic regulation based on homology with characterized yeast orthologs.
The antibody has been validated for:
Western Blot (WB): Detects a single band corresponding to the O74506 protein in lysates of S. pombe cells
Immunofluorescence (IF): Enables localization of the target protein to subcellular compartments
Potential use in Immunoprecipitation (IP): While not explicitly tested, its polyclonal nature makes it likely suitable for isolating protein complexes
The antibody is supplied in a buffer containing:
Preservative: 0.03% Proclin 300
Constituents: 50% Glycerol, 0.01M Phosphate Buffered Saline (PBS), pH 7.4
This formulation helps maintain antibody stability during storage and handling.
To validate antibody specificity in your experimental system, implement a multi-step approach:
Western blot validation: Run lysates from wild-type S. pombe alongside a negative control (ideally a SPCC594.03 gene knockout strain if available). A specific antibody will show a band at the expected molecular weight in wild-type but not in knockout samples .
Mass spectrometry validation: Perform immunoprecipitation with the antibody followed by mass spectrometry to identify all proteins captured. This approach can determine if the antibody binds to its intended target among thousands of other cellular components .
Sequence homology analysis: Use NCBI-BLAST to assess the target protein's sequence homology with other proteins within the proteome to predict potential cross-reactivity .
Immunofluorescence pattern analysis: Compare the subcellular localization pattern with published data or predicted localization based on protein function.
Always include appropriate controls to ensure experimental validity:
| Control Type | Purpose | Implementation |
|---|---|---|
| Positive Control | Confirms antibody activity | Use wild-type S. pombe (strain 972/ATCC 24843) lysate |
| Negative Control | Tests for non-specific binding | Use lysate from cells where the target is not expressed or knockout cells |
| Secondary Antibody Only | Detects non-specific binding of secondary antibody | Omit primary antibody but include all other reagents |
| Isotype Control | Identifies non-specific binding due to antibody class | Use non-specific antibody of same isotype and concentration |
| Blocking Peptide Control | Confirms epitope specificity | Pre-incubate antibody with excess antigen before application |
For optimal Western blot results with SPCC594.03 Antibody:
Sample preparation:
Lyse S. pombe cells in a buffer containing protease inhibitors to prevent protein degradation
Include phosphatase inhibitors if phosphorylation status is important
Denature samples at 95°C for 5 minutes in sample buffer containing SDS and reducing agent
Gel electrophoresis and transfer:
Use an appropriate percentage acrylamide gel based on target protein size
Ensure complete transfer to membrane using a transfer control stain
Antibody application:
Block membrane thoroughly (5% non-fat milk or BSA in TBST)
Start with 1:1000 dilution of SPCC594.03 Antibody and optimize as needed
Incubate overnight at 4°C for best results
Wash extensively with TBST between antibody applications
Detection:
Use an appropriate HRP-conjugated secondary antibody
Develop using enhanced chemiluminescence with exposure times optimized for signal-to-noise ratio
The SPCC594.03 Antibody was designed specifically for S. pombe (strain 972/ATCC 24843). Cross-reactivity with proteins from other organisms depends on sequence homology:
High probability of cross-reactivity (>75% sequence homology with immunogen)
Moderate probability of cross-reactivity (60-75% sequence homology)
Low probability of cross-reactivity (<60% sequence homology)
To predict cross-reactivity with a specific organism of interest:
Obtain the amino acid sequence of SPCC594.03 protein
Perform BLAST alignment against the proteome of your organism of interest
Calculate sequence homology percentages, particularly in immunogenic regions
Experimentally validate any predicted cross-reactivity
Determining if an antibody recognizes specific post-translational modifications (PTMs) requires specialized approaches:
Parallel analysis with PTM-specific antibodies: Run samples on parallel blots and probe with both SPCC594.03 Antibody and antibodies specific to common PTMs (phosphorylation, acetylation, etc.)
Enzyme treatment: Treat samples with enzymes that remove specific PTMs (e.g., phosphatases, deacetylases) and assess if this affects antibody recognition
Mass spectrometry analysis: After immunoprecipitation with SPCC594.03 Antibody, analyze pulled-down proteins using mass spectrometry with PTM detection capabilities
In vitro modification: Compare antibody recognition of recombinant proteins with and without specific PTMs
The SPCC594.03 Antibody may be valuable for studying meiotic processes in S. pombe, particularly if the target protein has a role in meiosis. Meiotic research applications could include:
Temporal expression analysis: Western blotting to detect changes in protein expression levels throughout meiotic progression
Localization studies: Immunofluorescence to track protein localization during different meiotic stages (leptotene, zygotene, pachytene, etc.)
Protein interaction investigations: Immunoprecipitation coupled with mass spectrometry to identify interaction partners specific to meiotic contexts
When designing meiotic studies with this antibody, consider the approaches used in similar research such as characterization of HOP1 and SUN1 proteins in planarian spermatogenesis, which revealed their essential roles in homolog pairing, synapsis, and bouquet formation during meiotic prophase .
For multi-protein interaction studies:
Sequential immunoprecipitation:
Perform primary IP with SPCC594.03 Antibody
Elute under mild conditions
Perform secondary IP with antibody against suspected interaction partner
Analyze final precipitate for enrichment of both proteins
Co-immunofluorescence:
Use SPCC594.03 Antibody with antibodies against other proteins of interest
Select secondary antibodies with non-overlapping fluorophores
Analyze co-localization using confocal microscopy and quantitative co-localization metrics
Proximity ligation assay (PLA):
Apply SPCC594.03 Antibody with antibody against potential interaction partner
Use species-specific PLA probes
Visualize interactions as fluorescent spots only when proteins are within 40nm of each other
SPCC594.03 Antibody can be integrated into quantitative proteomics workflows through several approaches:
Immunoprecipitation followed by mass spectrometry (IP-MS):
Selected reaction monitoring (SRM) or parallel reaction monitoring (PRM):
Develop targeted MS assays for O74506 protein and its interactors
Use antibody-based enrichment to improve sensitivity
Absolute quantification:
Use SPCC594.03 Antibody in western blots alongside a standard curve of recombinant target protein
Correlate band intensity with known protein quantities for absolute quantification
| Issue | Possible Causes | Solutions |
|---|---|---|
| No signal | Antibody degradation; Target not expressed; Incorrect secondary antibody | Use fresh aliquot; Confirm target expression; Verify secondary antibody compatibility |
| High background | Insufficient blocking; Too high antibody concentration; Non-specific binding | Optimize blocking conditions; Titrate antibody; Include 0.1-0.3% Triton X-100 in wash buffers |
| Multiple bands | Cross-reactivity; Protein degradation; Post-translational modifications | Include protease inhibitors; Validate with knockout controls; Perform peptide competition |
| Weak signal | Low target abundance; Insufficient incubation time; Inefficient transfer | Increase sample loading; Extend incubation time; Optimize transfer conditions |
| Inconsistent results | Batch-to-batch variation; Protocol inconsistencies | Use same antibody lot; Standardize protocols; Include positive controls |
For optimal preservation of antibody activity:
Storage conditions:
Store at -20°C for long-term storage
Avoid repeated freeze-thaw cycles by preparing single-use aliquots
Keep in the supplied buffer containing 50% glycerol
Handling recommendations:
Thaw aliquots on ice
Centrifuge briefly before opening to collect liquid at the bottom
Use sterile technique when handling to prevent contamination
Return to -20°C immediately after use
Working solution preparation:
Dilute in fresh, cold buffer immediately before use
Do not store diluted antibody for extended periods
Include 0.1% sodium azide in working solutions if they must be stored (not for HRP applications)
To ensure consistent performance across different antibody batches:
Standardized validation protocol:
Develop a reference Western blot protocol with standard samples
Generate a reference blot image with the current working batch
Test each new batch against the same samples and compare results
Key parameters to compare:
Signal intensity at standard dilution
Background levels
Specificity (absence of non-specific bands)
Sensitivity (detection limit)
Documentation and record-keeping:
Maintain detailed records of batch numbers and performance
Document any variations observed between batches
Adjust protocols as needed based on batch characteristics
While the SPCC594.03 Antibody is currently validated for detecting the native O74506 protein in S. pombe, it could potentially be adapted for use in engineered systems:
Recombinant expression systems:
Could detect O74506 protein expressed in other systems (E. coli, mammalian cells)
Useful for verifying successful heterologous expression
Tagged protein detection:
May recognize epitopes on tagged versions of the target protein
Could be used alongside tag-specific antibodies for confirmation
Comparative studies:
Could detect orthologs in engineered strains of related yeast species if sufficient homology exists
Similar to how researchers developed fluorescent strains of Treponema pallidum for tracking host-pathogen interactions , the SPCC594.03 Antibody could potentially be used to track engineered versions of its target protein.
If the O74506 protein is involved in stress response pathways in S. pombe, the SPCC594.03 Antibody could be instrumental in:
Stress-induced expression changes:
Monitor protein levels in response to various stressors (oxidative, osmotic, nutrient)
Track temporal changes during stress exposure and recovery
Stress-dependent relocalization:
Use immunofluorescence to monitor changes in subcellular localization during stress
Correlate localization changes with functional outcomes
Stress-specific interactions:
Identify stress-specific protein interaction partners through comparative IP-MS
Characterize how these interactions contribute to stress adaptation
Post-translational modifications:
Investigate stress-induced modifications that may alter antibody recognition
Correlate modifications with protein function during stress response
This application would be particularly relevant if the protein has functional similarities to other stress-response proteins in yeast.