GSP2 Antibody

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Description

Biological Role of GSPT2

GSPT2 is involved in:

  • Cell Cycle Regulation: Mediates transition from G1 to S phase, critical for cell proliferation .

  • Translational Termination: Interacts with eukaryotic release factors to ensure accurate protein synthesis .

  • Germline Immortality: In C. elegans, the ortholog GSP-2 (phosphatase) maintains genomic stability during meiosis, preventing sterility at elevated temperatures .

Western Blotting

  • Dilution Range: 1:500–1:2000.

  • Validation: Detects endogenous GSPT2 in human, mouse, and rat tissues (e.g., HEK293T lysates) .

Immunohistochemistry

  • Dilution Range: 1:600–1:2400.

  • Protocols: Antigen retrieval with citrate buffer (pH 6.0) or TE buffer (pH 9.0) enhances staining specificity .

Role in Meiotic Chromosome Dynamics

  • In C. elegans, GSP-2 (ortholog of GSPT2) interacts with LAB-1 to regulate chromosome cohesion. Mutants exhibit sterility at 25°C due to univalent chromosomes in oocytes .

  • Mechanism: GSP-2 promotes genomic silencing via small RNA pathways, ensuring germline immortality .

Implications in Cancer

Comparative Analysis of Antibody Performance

ParameterGSP2 Antibody (12989-1-AP)GDAP2 Antibody (17246-1-AP)
TargetGSPT2GDAP2 (ganglioside-induced differentiation protein)
ApplicationsWB, IHCWB, IHC, ELISA
Species ReactivityHuman, mouse, ratHuman, mouse, rat
Key Research UseCell cycle studiesNeurodegeneration research

Future Directions

  • Functional Studies: Investigate GSPT2’s role in cancer cell cycle dysregulation using knockout models.

  • Therapeutic Development: Explore GSPT2 as a biomarker for diseases linked to translational defects, such as ribosomopathies.

Product Specs

Buffer
**Preservative:** 0.03% Proclin 300
**Constituents:** 50% Glycerol, 0.01M PBS, pH 7.4
Form
Liquid
Lead Time
Made-to-order (14-16 weeks)
Synonyms
GSP2 antibody; CNR2 antibody; YOR185C antibody; GTP-binding nuclear protein GSP2/CNR2 antibody
Target Names
GSP2
Uniprot No.

Target Background

Function
GTP-binding protein involved in nucleocytoplasmic transport. Required for the import of proteins into the nucleus and also for RNA export. Not essential for cell viability.
Database Links

KEGG: sce:YOR185C

STRING: 4932.YOR185C

Protein Families
Small GTPase superfamily, Ran family
Subcellular Location
Nucleus.

Q&A

What are the optimal applications for GSP2 antibody in laboratory research?

GSP2 antibody demonstrates particular utility in Western Blot applications, with recommended dilution ratios between 1:1000-1:6000 for optimal results . When designing experiments, researchers should consider that antibody performance varies significantly across applications. Western blotting remains the most validated technique for GSP2 detection, particularly when examining neural tissue samples where positive detection has been confirmed in both mouse and rat brain tissues . When transferring to other applications, preliminary titration experiments are essential to establish appropriate working concentrations for your specific sample type.

How should researchers approach GSP2 antibody validation?

Validation must include positive controls using tissues with confirmed GSP2 expression, such as neural tissues where detection has been established . A comprehensive validation protocol should include:

  • Concentration gradient testing using recommended dilution ranges (1:1000-1:6000)

  • Comparison against known positive and negative control samples

  • Cross-validation using alternative detection methods where feasible

  • Specificity testing through knockdown/knockout validation where available

The most reliable validation approach combines multiple methods to confirm both specificity and sensitivity before proceeding to experimental applications.

What sample types are most appropriate for GSP2 antibody research?

Based on available data, neural tissues show consistent positive detection with GSP2 antibody, including mouse and rat brain samples . When working with novel sample types, researchers should:

  • Begin with recommended dilutions established for validated samples (1:1000 initially)

  • Include known positive samples (neural tissue) as procedural controls

  • Adjust protocols based on signal-to-noise ratio optimization

  • Document all optimization steps to establish reproducible conditions

This methodical approach ensures reliable detection across different experimental contexts while maintaining scientific rigor.

How should researchers interpret cross-reactivity between GSP2 antibody and related protein families?

Cross-reactivity analysis requires systematic investigation of potential molecular mimicry patterns. Similar to challenges observed with anti-B2GPI antibodies, where molecular mimicry between pathogen-derived antigens and self-antigens has been documented , researchers studying GSP2 antibody must establish clear specificity profiles.

A comprehensive cross-reactivity assessment protocol should include:

  • Competitive binding assays using purified related proteins

  • Western blot analysis comparing migration patterns of target versus suspected cross-reactive proteins

  • Immunoprecipitation followed by mass spectrometry to identify all captured proteins

  • Epitope mapping to identify specific recognition sequences

When interpreting results, researchers should consider that some cross-reactivity may reflect biologically meaningful structural similarities rather than technical limitations.

What are the critical considerations when comparing different detection methods for GSP2?

Method comparison studies must account for fundamental differences in detection principles. Drawing from experiences with anti-B2GPI isotype detection, where substantial variability exists between assay platforms , GSP2 antibody research requires similar methodological rigor.

When comparing methods, researchers should:

  • Maintain consistent sample preparation across all methods

  • Establish method-specific detection thresholds using standard curves

  • Calculate concordance rates between methods using statistical approaches

  • Document method-specific limitations transparently

Detection MethodSensitivity ConsiderationsSpecificity ConsiderationsRecommended Controls
Western BlotValidated at 1:1000-1:6000Size-based discriminationMouse/rat brain tissue
ELISARequires separate validationSusceptible to matrix effectsPurified protein standards
IHC/ICCRequires optimizationBackground signal challengesAbsorption controls

This comparative framework enables researchers to select appropriate methods based on specific experimental objectives while understanding inherent limitations.

How do different isotypes of antibodies against GSP2 affect experimental outcomes?

Isotype considerations significantly impact experimental interpretation, as demonstrated in anti-B2GPI research where IgG, IgM, and IgA isotypes show distinct clinical associations . For GSP2 antibody research, isotype selection should be guided by:

  • The specific cellular compartment being investigated

  • Whether complement activation is relevant to the research question

  • The detection system's sensitivity to different isotypes

  • The potential for isotype-specific background in target tissues

Research has demonstrated that isotype differences significantly affect antibody functionality. For instance, studies of anti-B2GPI revealed that IgG isotypes showed stronger clinical associations with thrombotic events compared to IgM isotypes, which showed weaker correlations . Similarly, IgA anti-B2GPI demonstrated unique associations with arterial thrombosis that differed from patterns seen with other isotypes . These findings underscore the importance of isotype-specific experimental design when working with GSP2 antibodies.

What are the optimal dilution protocols for different GSP2 antibody applications?

  • Initial broad-range titration experiments (e.g., 1:500, 1:1000, 1:2000, 1:4000, 1:8000)

  • Narrow-range refinement around optimal signal-to-noise ratio

  • Documentation of both signal intensity and background at each dilution

  • Consideration of sample-specific factors (protein abundance, extraction method)

For novel applications, researchers should begin with the manufacturer's recommended range and adjust based on empirical results, documenting all optimization steps for reproducibility.

How should researchers address GSP2 antibody specificity concerns in complex samples?

Specificity validation in complex samples requires multiple complementary approaches. Drawing from strategies used in other antibody research fields, such as those employed with bispecific antibodies and anti-B2GPI antibodies , researchers should implement:

  • Competitive inhibition with purified antigen

  • Pre-absorption controls using recombinant target protein

  • Comparison between multiple antibodies targeting different epitopes of the same protein

  • Genetic models (knockdown/knockout) where feasible to confirm signal specificity

These approaches collectively strengthen confidence in antibody specificity beyond what any single validation method can provide.

What quality control measures are essential for long-term GSP2 antibody storage and use?

Quality control protocols should address both storage stability and batch-to-batch consistency. Researchers should:

  • Maintain aliquoting practices to minimize freeze-thaw cycles

  • Implement periodic validation using standard samples with established signal patterns

  • Document lot numbers and include lot-specific controls in critical experiments

  • Establish internal reference standards for quantitative applications

Regular performance testing using consistent positive controls (such as mouse brain tissue samples ) allows researchers to detect performance degradation before it compromises experimental results.

How can researchers troubleshoot inconsistent results with GSP2 antibody across experiments?

Systematic troubleshooting requires comprehensive documentation and methodical hypothesis testing. When encountering inconsistent results, researchers should:

  • Review all experimental variables including:

    • Antibody dilution and incubation conditions

    • Sample preparation methods and buffer compositions

    • Detection system components and reagent age

    • Equipment calibration and maintenance status

  • Implement controlled comparison experiments:

    • Side-by-side processing of previous and current samples

    • Parallel testing of multiple antibody lots if available

    • Systematic variation of single protocol elements

    • Inclusion of internal controls in all experiments

This structured approach isolates variables contributing to inconsistency while establishing reproducible conditions for future experiments.

What considerations should guide experimental design for GSP2 antibody specificity testing?

Robust experimental design for specificity testing must address multiple potential confounding factors. Similar to approaches used in anti-B2GPI antibody research, where assay standardization has been challenging , GSP2 antibody specificity testing should include:

  • Multiple negative controls including:

    • Secondary antibody-only controls

    • Isotype-matched irrelevant primary antibody controls

    • Genetic models lacking target expression where available

  • Cross-reactivity assessment against structurally related proteins

  • Epitope-blocking experiments using peptide competitors

  • Multiple detection methods to confirm specificity across platforms

This comprehensive approach minimizes the risk of false positives while establishing confidence in positive signals.

How should researchers interpret differences in GSP2 antibody performance across species?

Cross-species reactivity interpretation requires understanding of both evolutionary conservation and potential epitope variations. Current data confirms reactivity with mouse and rat brain tissues , suggesting conserved epitopes across rodent species. When expanding to additional species, researchers should:

  • Conduct sequence homology analysis focusing on the antibody's target epitope

  • Implement graduated dilution series for each new species

  • Include consistent positive controls (rodent samples) alongside new species samples

  • Document species-specific optimization parameters separately

This approach distinguishes between true negative results and technical limitations when working across species barriers.

What statistical approaches are most appropriate for analyzing variable GSP2 antibody signal intensity?

Statistical analysis must account for both technical and biological sources of variation. Drawing from approaches used in other antibody fields, researchers should:

  • Implement technical replicate averaging to establish measurement precision

  • Apply appropriate normalization methods based on experimental design:

    • Loading controls for Western blot

    • Housekeeping proteins for relative quantification

    • Standard curves for absolute quantification

  • Select statistical tests based on:

    • Data distribution characteristics

    • Sample independence considerations

    • Research question specificity

    • Required statistical power

How can GSP2 antibodies be integrated into multi-parameter imaging applications?

Multi-parameter imaging with GSP2 antibodies requires systematic optimization of multiplexing conditions. Researchers should:

  • Establish single-parameter optimization first:

    • Determine optimal fixation conditions for epitope preservation

    • Optimize antibody concentration specifically for imaging applications

    • Document autofluorescence patterns in target tissue

  • Develop sequential staining protocols addressing:

    • Antibody cross-reactivity mitigation

    • Signal amplification requirements

    • Spectral overlap compensation

    • Antigen masking considerations

  • Implement appropriate controls for multiplexed imaging:

    • Single-stain controls for spectral unmixing

    • Fluorophore interaction controls

    • Sequential vs. simultaneous staining comparisons

This methodical approach maximizes information yield while maintaining signal specificity in complex imaging applications.

What emerging technologies are enhancing GSP2 antibody research applications?

Emerging technologies are continually expanding antibody research capabilities, similar to advances seen in bispecific antibody development and broadly neutralizing antibodies . Researchers should consider:

  • Single-cell applications:

    • Mass cytometry for high-dimensional protein profiling

    • Single-cell Western blot for heterogeneity assessment

    • Imaging mass cytometry for spatial context preservation

  • Advanced imaging approaches:

    • Super-resolution microscopy for subcellular localization

    • Expansion microscopy for physical sample magnification

    • Light-sheet microscopy for rapid volumetric imaging

  • Functional screening technologies:

    • CRISPR screening combined with antibody-based readouts

    • Proximity labeling with antibody validation

    • Spatial transcriptomics correlated with protein expression

These technological advances offer new experimental possibilities when integrated with well-validated GSP2 antibody protocols.

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