SPCC550.07 Antibody

What is SPCC550.07 and what experimental systems require its antibody?

SPCC550.07 is a protein encoded in the genome of Schizosaccharomyces pombe (strain 972 / ATCC 24843), commonly known as fission yeast. This protein has been investigated in the context of cell cycle regulation and cellular morphology studies. The antibody against SPCC550.07 (e.g., CSB-PA523960XA01SXV) is primarily used in experimental systems focused on:

• Fission yeast cell biology research

• Cell division cycle studies

• Cellular morphogenesis investigations

• Protein-protein interaction networks in S. pombe

The antibody is typically raised in rabbit and produced through recombinant protein immunization strategies to ensure specificity for the target protein in S. pombe extracts .

What validation methods should be applied to confirm SPCC550.07 antibody specificity?

Validating antibody specificity is critical for reliable research outcomes. For SPCC550.07 antibody, implement these methodological approaches:

• Genetic knockout comparison: Use wild-type and SPCC550.07 deletion strains of S. pombe to confirm absence of signal in knockout samples

• siRNA knockdown validation: As demonstrated in research practices for other proteins, siRNA-mediated knockdown provides critical negative controls for antibody specificity

• Peptide competition assay: Pre-incubate antibody with purified SPCC550.07 recombinant protein prior to application

• Cross-reactivity testing: Test the antibody against related fission yeast proteins to ensure specificity

• Multiple detection methods: Compare results across Western blot, immunofluorescence, and ELISA applications

This multi-faceted validation approach significantly improves experimental reliability and reproducibility, addressing concerns about antibody specificity that contribute to the reproducibility crisis in biological research .

What are the optimal storage and handling conditions for SPCC550.07 antibody?

Based on standard protocols for similar antibodies in S. pombe research:

When working with SPCC550.07 antibody, centrifuge briefly before opening the tube to collect all liquid at the bottom, especially after thawing from frozen storage .

What are the recommended protocols for SPCC550.07 antibody in Western blotting?

The following protocol has been optimized for detecting SPCC550.07 in S. pombe lysates:

Sample preparation:

• Grow S. pombe cultures to mid-log phase (OD600 = 0.5-0.8)

• Harvest cells (1-5 × 10^7 cells) by centrifugation

• Prepare extracts following established S. pombe protocols, similar to those used for Spo4-HA detection

• Include protease inhibitors to prevent degradation

Western blotting protocol:

• Resolve proteins on 10-12% SDS-PAGE gels

• Transfer to PVDF membrane (recommended over nitrocellulose for yeast proteins)

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

• Incubate with SPCC550.07 antibody at 1:1000 dilution overnight at 4°C

• Wash 3× with TBST

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

• Detect using chemiluminescence

• Always include a loading control (e.g., anti-α-tubulin antibody at 1:1000)

This protocol can be adjusted based on protein expression levels and specific experimental requirements.

How can SPCC550.07 antibody be optimized for immunofluorescence microscopy?

For successful immunofluorescence detection of SPCC550.07 in fission yeast:

• Cell fixation: Use glutaraldehyde (0.25%) and paraformaldehyde (3.7%) combination for 30 minutes to preserve S. pombe cellular structures

• Cell wall digestion: Treat with zymolyase (1 mg/mL) for 30 minutes to improve antibody penetration

• Blocking: Use 1% BSA, 0.1% Triton X-100 in PBS for 1 hour

• Primary antibody: Dilute SPCC550.07 antibody 1:100-1:500 in blocking buffer, incubate overnight at 4°C

• Secondary antibody: Use Alexa Fluor-conjugated secondary antibodies at 1:500 dilution

• Nuclear counterstain: Include DAPI (1 μg/mL) to visualize nuclei

• Controls: Include the following critical controls:

  • Wild-type vs. SPCC550.07 deletion strain

  • Primary antibody omission control

  • Pre-immune serum control

For co-localization studies, consider using established S. pombe markers such as Sad1 for spindle pole bodies or anti-α-tubulin for microtubules .

What approaches are recommended for SPCC550.07 antibody in co-immunoprecipitation experiments?

For successful co-immunoprecipitation to identify SPCC550.07 interaction partners:

• Cell lysis:

  • Grow 50-100 mL of S. pombe culture to mid-log phase

  • Harvest cells and lyse using glass beads in lysis buffer (50 mM HEPES pH 7.5, 150 mM NaCl, 1 mM EDTA, 1% Triton X-100) with protease inhibitors

  • Clear lysate by centrifugation (13,000 rpm, 15 min, 4°C)

• Immunoprecipitation:

  • Pre-clear lysate with Protein A/G beads for 1 hour

  • Incubate cleared lysate with SPCC550.07 antibody (5-10 μg) overnight at 4°C

  • Add Protein A/G beads and incubate for 2-3 hours

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

  • Elute proteins with SDS sample buffer or low pH glycine

• Analysis:

  • Analyze by SDS-PAGE followed by Western blotting or mass spectrometry

  • Include IgG control immunoprecipitation

  • Validate interactions with reverse co-IP using antibodies against putative partners

This approach is similar to methods used to identify interaction partners of other S. pombe proteins like Spo4 and Spo6 .

How can we use SPCC550.07 antibody to investigate protein dynamics during cell cycle progression?

For studying cell cycle-dependent changes in SPCC550.07:

• Synchronization strategies:

  • Use nitrogen starvation and release for G1 synchronization

  • Employ hydroxyurea block and release for S-phase synchronization

  • Implement cdc25-22 temperature-sensitive mutants for G2/M synchronization

• Time-course sampling:

  • Collect samples at 15-20 minute intervals across 1-2 cell cycles

  • Confirm synchronization by monitoring septation index and DAPI staining

  • Process samples simultaneously for Western blotting and immunofluorescence

• Analysis approaches:

  • Quantify protein levels by Western blot, normalizing to a stable reference protein

  • Track localization changes by immunofluorescence

  • Correlate with cell cycle markers (e.g., Cdc13, Cut2)

• Co-visualization techniques:

  • Combine with live-cell imaging techniques if working with tagged versions

  • Use multi-color immunofluorescence to correlate with known cell cycle markers

This approach allows correlating SPCC550.07 dynamics with specific cell cycle stages, similar to studies performed for other S. pombe proteins involved in cell morphology regulation .

What are the most effective methods to study SPCC550.07's role in cellular morphogenesis?

To investigate potential roles in morphogenesis:

• Genetic manipulation approaches:

  • Generate knockout and overexpression strains

  • Create temperature-sensitive mutants for conditional studies

  • Construct point mutations in key functional domains

• Morphological analysis:

  • Measure cell dimensions (length, width) in mutant vs. wild-type cells

  • Analyze cellular shape using quantitative image analysis

  • Assess polarity markers distribution (e.g., Tea1, Pom1)

• Growth condition variations:

  • Test protein function under standard conditions vs. stress conditions

  • Evaluate recovery from cell cycle arrests

  • Assess response to cell wall/membrane perturbations

• Relationship to known morphogenesis regulators:

  • Test genetic interactions with Cdc42 pathway components, as Cdc42 is crucial for fission yeast cell width control

  • Investigate colocalization with cell polarity markers

  • Perform epistasis analysis with known morphology regulators

This systematic approach allows determining whether SPCC550.07 functions in pathways similar to the 11 genes identified in genome-wide screens for cell width regulators in S. pombe .

How can we use the SPCC550.07 antibody for investigating protein-protein interactions in S. pombe?

Beyond standard co-immunoprecipitation, these advanced approaches can reveal SPCC550.07 interaction partners:

• Proximity-dependent labeling:

  • Express SPCC550.07 fused to BioID or TurboID in S. pombe

  • Use the antibody to confirm expression and localization

  • Identify biotinylated proteins as proximity partners

• Cross-linking immunoprecipitation (CLIP):

  • Treat cells with formaldehyde to cross-link protein complexes

  • Immunoprecipitate with SPCC550.07 antibody

  • Identify partners by mass spectrometry

  • Validate interactions with reciprocal experiments

• Two-hybrid validation:

  • Use yeast two-hybrid screening to identify potential interactors

  • Validate interactions with co-IP using the SPCC550.07 antibody

  • Perform quantitative binding studies with purified components

• Functional validation:

  • Knockdown/knockout of interaction partners

  • Assess effects on SPCC550.07 localization and function

  • Test for genetic interactions and phenotypic similarities

This strategy mirrors approaches used to characterize other protein complexes in S. pombe, such as the Cdc7-Dbf4-like kinase complex (Spo4-Spo6) .

What methodologies are recommended for studying post-translational modifications of SPCC550.07?

To investigate potential post-translational modifications:

• Phosphorylation analysis:

  • Immunoprecipitate SPCC550.07 using the specific antibody

  • Analyze by phospho-specific staining or mass spectrometry

  • Create phospho-mimetic and phospho-deficient mutants of predicted sites

  • Use phosphatase treatment to confirm modifications

• Other modifications:

  • Test for ubiquitination by immunoprecipitating under denaturing conditions

  • Investigate SUMOylation using co-IP with SUMO components

  • Examine potential glycosylation using glycosidase treatments

• Kinase/enzyme identification:

  • Perform kinase inhibitor screens to identify regulatory pathways

  • Test candidate kinases in vitro using recombinant proteins

  • Create genetic knockouts of candidate modifying enzymes

• Functional consequences:

  • Correlate modifications with cell cycle stages or stress responses

  • Test how mutations affecting modification sites impact protein function

  • Investigate how modifications affect protein-protein interactions

This approach is similar to methodologies used to characterize phosphorylation of the Spo4 kinase (Thr264) in S. pombe, which was critical for understanding its regulation .

What are the most common issues when working with SPCC550.07 antibody and how can they be resolved?

Implement systematic troubleshooting by changing one variable at a time and documenting results meticulously.

How can we differentiate between specific and non-specific binding when using SPCC550.07 antibody?

To ensure specificity and minimize false positives:

• Essential controls:

  • Include SPCC550.07 deletion strain samples

  • Perform peptide competition assays

  • Use pre-immune serum as negative control

  • Include siRNA knockdown samples when possible

• Validation across techniques:

  • Compare results from Western blot, immunofluorescence, and immunoprecipitation

  • Verify that the same molecular weight band is detected consistently

  • Confirm that localization patterns match expected distribution

• Quantitative assessment:

  • Perform titration experiments with different antibody concentrations

  • Plot signal-to-noise ratios to determine optimal working concentration

  • Compare signals between specific and non-specific bands

• Confirmatory approaches:

  • Use epitope-tagged versions of SPCC550.07 and compare antibody detection with anti-tag antibodies

  • Verify results with a second antibody against a different epitope if available

  • Correlate antibody detection with mRNA expression data