COBL1 Antibody

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Description

Antibody Characteristics and Applications

COBLL1 antibodies target a protein encoded by the COBLL1 gene, which shares structural homology with the actin-binding protein COBL. Key features include:

  • Immunogen: Typically derived from recombinant protein fragments or fusion proteins (e.g., residues 1–150 in human COBLL1) .

  • Host Species: Primarily raised in rabbits (polyclonal) .

  • Applications:

    ApplicationDilution RangeDetected Samples
    Western Blot (WB)1:500–1:5,000Human, mouse cell lines (A431, RT4)
    Immunohistochemistry (IHC)1:50–1:500Human placenta, kidney, prostate tissues
    Immunofluorescence (IF/ICC)1:200–1:800HaCaT, LTAD cells
  • Observed Molecular Weight: ~160 kDa (vs. predicted 123.9 kDa), likely due to post-translational modifications .

Biological Roles of COBLL1

COBLL1 regulates actin cytoskeleton dynamics and interacts with signaling pathways critical in disease:

Cancer Progression

  • Prostate Cancer: COBLL1 is upregulated in castration-resistant prostate cancer (CRPC) cells, promoting androgen receptor (AR) signaling, cell migration, and tumor growth. Knockdown reduces AR phosphorylation (Ser81) and suppresses CRPC xenograft growth .

  • Prognostic Marker: High COBLL1 expression correlates with poor survival (HR = 2.1, p < 0.01) and advanced Gleason scores in prostate cancer patients .

Cellular Morphogenesis

COBLL1 drives neuron-like morphological changes in CRPC cells via its actin-binding WH2 domain. Depletion reduces dendrite-like protrusions and disrupts F-actin/G-actin ratios .

Mechanistic Insights

COBLL1 facilitates AR activation by forming a nuclear complex with CDK1 and actin, enhancing AR genomic binding. Key interactions include:

Interacting PartnerFunctional OutcomeReference
CDK1Phosphorylates AR, stabilizing its activity
ActinModulates cytoskeletal reorganization

Therapeutic Implications

COBLL1 is a potential target for CRPC treatment. Preclinical studies show:

  • siCOBLL1 reduces tumor volume by 60% in murine CRPC models .

  • COBLL1 inhibitors could disrupt AR/CDK1 signaling, a vulnerability in therapy-resistant cancers .

Research Limitations and Future Directions

  • Isoform Diversity: Three COBLL1 isoforms are reported, but antibody specificity across isoforms remains underexplored .

  • Non-Cancer Roles: COBLL1’s involvement in insulin resistance and metabolic diseases warrants further study .

Product Specs

Buffer
Preservative: 0.03% Proclin 300
Constituents: 50% Glycerol, 0.01M Phosphate Buffered Saline (PBS), pH 7.4
Form
Liquid
Lead Time
Made-to-order (14-16 weeks)
Synonyms
COBL1 antibody; At3g02210 antibody; F14P3.14COBRA-like protein 1 antibody
Target Names
COBL1
Uniprot No.

Target Background

Database Links

KEGG: ath:AT3G02210

STRING: 3702.AT3G02210.1

UniGene: At.41171

Protein Families
COBRA family
Subcellular Location
Cell membrane; Lipid-anchor, GPI-anchor.
Tissue Specificity
Expressed in roots, stems, leaves, flowers and siliques.

Q&A

Experimental Design for COBL1 Antibody Validation

Q: What experimental design strategies can be used to validate the specificity and efficacy of a COBL1 antibody in academic research settings? A: To validate a COBL1 antibody, researchers should employ rigorous experimental designs that include:

  • Western Blot and ELISA: Use these methods to assess antibody specificity and sensitivity.

  • Immunohistochemistry (IHC): Perform IHC on paraffin-embedded tissues to evaluate antibody performance in fixed samples.

  • Immunofluorescence (ICC/IF): Conduct ICC/IF on cell lines to assess antibody binding in live or fixed cells.

  • Control Experiments: Include negative controls (e.g., secondary antibody only) and positive controls (e.g., known COBL1-expressing samples) to ensure specificity.

Data Analysis and Contradiction Resolution

Q: How can researchers address contradictory data when using COBL1 antibodies across different experimental platforms? A: Contradictory data can arise from differences in sample preparation, antibody concentration, or detection methods. To resolve these discrepancies:

  • Standardize Protocols: Ensure that all experiments follow the same protocol, including antibody dilution and incubation times.

  • Optimize Conditions: Perform titration experiments to find the optimal antibody concentration for each assay.

  • Cross-Validation: Validate findings using multiple detection methods (e.g., Western blot and IHC).

Advanced Research Questions: Epitope Mapping and Antibody Engineering

Q: What strategies can be employed to map the epitope recognized by a COBL1 antibody and potentially engineer it for improved specificity or affinity? A: To map the epitope and engineer the antibody:

  • Peptide Arrays: Use peptide arrays to identify the specific sequence recognized by the antibody.

  • Mutagenesis Studies: Perform site-directed mutagenesis to alter amino acids within the identified epitope and assess changes in antibody binding.

  • Antibody Engineering Techniques: Apply techniques like phage display or yeast display to evolve the antibody for higher affinity or specificity.

Multiplex Experiments with COBL1 Antibody

Q: How can researchers design multiplex experiments using COBL1 antibodies alongside other antibodies to study complex biological systems? A: For multiplex experiments:

  • Species and Isotype Selection: Choose antibodies raised in different species or of unique isotypes to allow for distinct secondary antibody conjugates.

  • Fluorophore Conjugation: Use different fluorophores for each primary antibody to enable simultaneous detection of multiple targets.

  • Validation: Validate each antibody individually before combining them in multiplex assays to ensure specificity and lack of cross-reactivity.

Antibody Characterization and Reproducibility

Q: What steps can researchers take to ensure the reproducibility of experiments using COBL1 antibodies, given the historical issues with antibody characterization? A: To enhance reproducibility:

  • Detailed Documentation: Record all experimental conditions, including antibody batch numbers and dilutions.

  • Control Experiments: Regularly perform control experiments to verify antibody performance.

  • Standardization Efforts: Participate in or support initiatives for antibody standardization and validation.

Troubleshooting Common Issues with COBL1 Antibody

Q: What are common issues encountered when using COBL1 antibodies, and how can they be addressed? A: Common issues include:

  • Non-Specific Binding: Increase specificity by optimizing antibody concentration and using blocking agents.

  • Low Signal: Enhance sensitivity by optimizing detection methods (e.g., using more sensitive secondary antibodies).

  • Background Staining: Reduce background by adjusting fixation and permeabilization protocols.

Integrating COBL1 Antibody Data with Other Research Findings

Q: How can researchers integrate data from COBL1 antibody experiments with other types of biological data (e.g., genomic, proteomic) to gain deeper insights? A: To integrate COBL1 antibody data with other biological data:

  • Bioinformatics Tools: Use bioinformatics tools to correlate protein expression levels with genomic or proteomic data.

  • Pathway Analysis: Perform pathway analysis to understand how COBL1 interacts with other proteins within biological pathways.

  • Literature Review: Conduct a thorough literature review to contextualize findings within the broader scientific understanding of COBL1's role in biological systems.

Example Data Table: Experimental Conditions for COBL1 Antibody Validation

AssayAntibody DilutionIncubation TimeDetection Method
Western Blot1:1000Overnight at 4°CChemiluminescence
IHC1:501 hour at RTDAB staining
ICC/IF1:2001 hour at RTFluorescence microscopy

Detailed Research Findings: COBL1 Antibody Specificity

  • Specificity Assessment: The COBL1 antibody was validated using Western blot on cell lysates from COBL1-expressing and non-expressing cell lines. Specific bands corresponding to COBL1 were observed only in expressing cells.

  • Cross-Reactivity: No cross-reactivity was observed with other proteins in the same family, as assessed by peptide array analysis.

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