SPBC14F5.10c Antibody

What is SPBC14F5.10c and what is its function in S. pombe?

SPBC14F5.10c is a protein expressed in Schizosaccharomyces pombe (fission yeast) that contains a LON peptidase N-terminal domain and a RING finger domain. It is predicted to function as an ubiquitin-protein ligase E3, suggesting its involvement in the ubiquitin-proteasome pathway for protein degradation and cellular regulation . This protein plays a potential role in protein quality control and cellular homeostasis, which are critical processes in yeast cellular biology.

What structural domains characterize the SPBC14F5.10c protein?

The SPBC14F5.10c protein contains two key structural domains that define its functionality:

• LON peptidase N-terminal domain: Associated with ATP-dependent proteases that are involved in protein quality control

• RING finger domain: Typically associated with E3 ubiquitin ligases that facilitate the transfer of ubiquitin to substrate proteins

These domains suggest that SPBC14F5.10c participates in protein degradation pathways, potentially recognizing and targeting misfolded or damaged proteins for ubiquitination and subsequent degradation .

What are the common experimental models where SPBC14F5.10c is studied?

SPBC14F5.10c is primarily studied in Schizosaccharomyces pombe strain 972/ATCC 24843 (fission yeast). S. pombe serves as an excellent model organism for eukaryotic cell biology due to its relatively simple genome and genetic tractability. For mutation studies, researchers often use haploid lines of S. pombe grown through multiple generations to study the effects of mutations on gene function and protein expression . These accumulated mutation studies can reveal important insights about gene function and regulation that might not be apparent in short-term experiments.

What are the key specifications of available SPBC14F5.10c antibodies?

The commercially available SPBC14F5.10c antibody has the following specifications:

This polyclonal antibody recognizes the SPBC14F5.10c protein in fission yeast and has been validated for specific research applications .

What validation techniques confirm SPBC14F5.10c antibody specificity?

For confirming antibody specificity, researchers should implement the following validation techniques:

• Western blot analysis against wild-type S. pombe lysates, showing a single band at the expected molecular weight

• Parallel analysis with pre-immune serum as a negative control to establish baseline non-specific binding

• Testing against SPBC14F5.10c knockout strains to confirm absence of signal

• Peptide competition assays to verify epitope-specific binding

• Cross-reactivity testing against related proteins with similar domains

Most commercial SPBC14F5.10c antibodies are validated using antigen-specific ELISA and Western blot analysis to ensure proper target recognition before distribution to researchers .

What are the recommended applications for SPBC14F5.10c antibody?

SPBC14F5.10c antibody has been validated for the following applications:

• Western Blot (WB): For detecting the target protein in cell lysates and determining relative expression levels across different experimental conditions

• ELISA (Enzyme-Linked Immunosorbent Assay): For quantitative detection of the target protein in solution

• Potential applications based on similar antibodies include:

  • Immunoprecipitation (IP): For isolating protein complexes associated with SPBC14F5.10c

  • Immunofluorescence (IF): For visualizing subcellular localization (though additional optimization may be required)

Researchers should note that extensive validation is recommended when adopting the antibody for applications beyond those explicitly validated by manufacturers .

What is the recommended Western blot protocol for SPBC14F5.10c antibody?

For optimal Western blot results with SPBC14F5.10c antibody, we recommend the following protocol:

• Sample preparation:

  • Lyse S. pombe cells using glass bead disruption in buffer containing protease inhibitors

  • Clarify lysate by centrifugation (14,000 × g, 10 minutes, 4°C)

  • Determine protein concentration using Bradford or BCA assay

• SDS-PAGE and transfer:

  • Load 20-50 μg total protein per lane

  • Separate proteins using 10-12% polyacrylamide gels

  • Transfer to PVDF membrane (0.45 μm)

• Antibody incubation:

  • Block membrane with 5% non-fat milk in TBST for 1 hour at room temperature

  • Incubate with SPBC14F5.10c primary antibody (1:500-1:1000 dilution) overnight at 4°C

  • Wash 3× with TBST

  • Incubate with HRP-conjugated anti-rabbit secondary antibody (1:5000) for 1 hour

  • Wash 4× with TBST

• Detection:

  • Develop using enhanced chemiluminescence substrate

  • Expected molecular weight: Based on the sequence, typically 60-70 kDa

This protocol should be optimized based on specific laboratory conditions and experimental requirements .

How can I optimize immunoprecipitation protocols with SPBC14F5.10c antibody?

For effective immunoprecipitation of SPBC14F5.10c and its binding partners:

• Lysate preparation:

  • Use mild lysis buffer (50 mM Tris-HCl pH 7.5, 150 mM NaCl, 0.5% NP-40, protease inhibitors)

  • Clear lysate by centrifugation (14,000 × g, 10 minutes, 4°C)

• Pre-clearing:

  • Incubate lysate with Protein A/G beads for 1 hour at 4°C

  • Remove beads by centrifugation

• Immunoprecipitation:

  • Add 2-5 μg SPBC14F5.10c antibody to 500 μg pre-cleared lysate

  • Incubate overnight at 4°C with gentle rotation

  • Add 30 μl Protein A/G beads and incubate for 2-4 hours

  • Wash beads 4× with wash buffer (lysis buffer with reduced detergent)

• Elution and analysis:

  • Elute bound proteins with SDS sample buffer

  • Analyze by SDS-PAGE and Western blot

Include controls such as pre-immune serum or IgG from non-immunized rabbit to identify non-specific binding. For studying E3 ligase activity, consider modified protocols that preserve ubiquitination by including deubiquitinase inhibitors.

How can I resolve high background issues when using SPBC14F5.10c antibody?

High background is a common challenge when working with polyclonal antibodies. To mitigate this issue:

• Increase blocking stringency:

  • Use 5% BSA instead of milk for blocking

  • Consider adding 0.1-0.5% Tween-20 to blocking buffer

• Optimize antibody concentration:

  • Perform a dilution series (1:500, 1:1000, 1:2000, 1:5000)

  • Use the highest dilution that still yields specific signal

• Increase washing:

  • Add an additional washing step with high-salt buffer (250-500 mM NaCl)

  • Increase washing time to 10 minutes per wash

• Apply additional blocking agents:

  • Add 5% normal serum from the secondary antibody host species

  • Consider using commercial background reducers

• Pre-adsorb the antibody:

  • Incubate with lysate from SPBC14F5.10c knockout strain

These approaches should be tested systematically to determine which combination works best for your specific experimental system.

What strategies exist for detecting low-abundance SPBC14F5.10c in complex samples?

When SPBC14F5.10c is expressed at low levels or in complex samples:

• Enrichment strategies:

  • Perform subcellular fractionation to isolate relevant compartments

  • Use immunoprecipitation to concentrate the target protein before analysis

• Signal amplification:

  • Use high-sensitivity ECL substrates for Western blot

  • Consider tyramide signal amplification for immunofluorescence

  • Implement biotin-streptavidin systems for detection enhancement

• Sample processing:

  • Optimize lysis conditions to ensure complete protein extraction

  • Use proteasome inhibitors if studying unstable forms of the protein

  • Consider native vs. denaturing conditions based on epitope accessibility

• Detection systems:

  • Employ fluorescent secondary antibodies with digital imaging for better quantification

  • Use nanoparticle-conjugated secondary antibodies for enhanced sensitivity

These approaches can significantly improve detection of low-abundance SPBC14F5.10c protein in research samples.

How does mutation in the SPBC14F5.10c gene affect antibody recognition?

Mutations in SPBC14F5.10c may impact antibody recognition depending on where the mutations occur relative to antibody epitopes. Consider the following:

• Epitope mapping:

  • Polyclonal antibodies recognize multiple epitopes, making them more resistant to single mutations

  • If available, determine which regions of SPBC14F5.10c are recognized by the antibody

• Mutation analysis:

  • Point mutations may have minimal effect if outside epitope regions

  • Frameshift mutations causing truncations can eliminate epitopes

  • Mutations affecting protein folding may alter epitope presentation

• Experimental verification:

  • Always validate antibody recognition of mutant forms via Western blot

  • Use recombinant mutant proteins as positive controls

  • Consider creating an epitope-tagged version for independent detection

In S. pombe mutation accumulation studies, mutations occur at various rates across the genome, which might affect protein structure and antibody recognition. The mutation rate in S. pombe has been estimated through comprehensive studies tracking mutations across multiple generations .

How can SPBC14F5.10c antibody be used to study ubiquitination pathways in yeast?

As SPBC14F5.10c is predicted to function as an E3 ubiquitin ligase, its antibody is valuable for studying ubiquitination pathways:

• Substrate identification:

  • Use SPBC14F5.10c antibody for co-immunoprecipitation followed by mass spectrometry

  • Compare ubiquitination profiles in wild-type vs. SPBC14F5.10c-deleted strains

• Enzyme activity assays:

  • Immunoprecipitate SPBC14F5.10c and perform in vitro ubiquitination assays

  • Monitor auto-ubiquitination as a measure of enzyme activity

• Complex formation analysis:

  • Use the antibody to identify interactions with other ubiquitination machinery components

  • Study co-localization with proteasome components

• Regulation studies:

  • Examine SPBC14F5.10c expression and activity under different stress conditions

  • Investigate post-translational modifications that regulate its activity

These approaches allow researchers to place SPBC14F5.10c within the broader context of cellular protein quality control and degradation pathways.

What control experiments are necessary when studying SPBC14F5.10c function?

Rigorous controls are essential for generating reliable data about SPBC14F5.10c:

• Genetic controls:

  • SPBC14F5.10c deletion strain (negative control)

  • Complementation with wild-type gene (rescue control)

  • Point mutants affecting catalytic activity (functional controls)

• Antibody controls:

  • Pre-immune serum for immunoprecipitation and immunofluorescence

  • Peptide competition assays to confirm specificity

  • Secondary antibody-only controls

• Experimental controls:

  • Related E3 ligases from S. pombe for functional comparison

  • Time-course experiments to establish causality

  • Dose-response studies when applicable

• Technical controls:

  • Loading controls for Western blot (total protein or housekeeping genes)

  • Positive controls with known ubiquitination substrates

  • Multiple biological and technical replicates

Implementation of these controls ensures the biological relevance and reproducibility of findings related to SPBC14F5.10c function.

How do antibody-based approaches compare with other methods for studying SPBC14F5.10c?

Researchers should consider multiple methodologies when studying SPBC14F5.10c:

This multi-method approach provides comprehensive insights into SPBC14F5.10c biology that would not be possible with a single technique.

How might SPBC14F5.10c antibodies be incorporated into high-throughput screening approaches?

SPBC14F5.10c antibodies can enhance high-throughput screening methodologies:

• Automated immunoassay platforms:

  • Adaptation to plate-based ELISA formats for screening chemical libraries

  • Integration with liquid handling systems for rapid processing

• Phenotypic screening:

  • High-content imaging using fluorescently-labeled antibodies

  • Correlation of SPBC14F5.10c levels with cellular phenotypes

• Genetic interaction mapping:

  • Combining with genome-wide deletion libraries in S. pombe

  • Quantitative Western blot analysis across mutant collections

• Protein microarray applications:

  • Using the antibody as a probe for protein interaction studies

  • Reverse phase arrays to detect SPBC14F5.10c across sample collections

These high-throughput approaches can accelerate discovery while maintaining the specificity offered by antibody-based detection.

What considerations apply when interpreting SPBC14F5.10c expression data across mutation accumulation studies?

When analyzing SPBC14F5.10c expression in mutation accumulation studies:

• Mutation context analysis:

  • Assess whether mutations affect the coding sequence, promoter, or regulatory elements

  • Determine if mutations in interacting partners affect SPBC14F5.10c levels

• Statistical considerations:

  • In long-term mutation accumulation studies (like the 1952 generations study), establish appropriate baseline variation

  • Account for generation number when comparing expression levels

• Phenotypic correlation:

  • Link SPBC14F5.10c expression changes to specific cellular phenotypes

  • Consider whether changes are cause or consequence of observed phenotypes

• Evolutionary interpretation:

  • Evaluate conservation of expression patterns across related yeast species

  • Consider the selective pressures on E3 ligase function

This integrative analysis places expression data within broader evolutionary and functional contexts.