EFFECT OF PHOSPHORYLATION ON INTERACTION OF P130CAS WITH AND-34

磷酸化对 P130CAS 与 AND-34 相互作用的影响

• 批准号: 8170923
• 负责人: ADAM LERNER
• 金额: $ 2.09万
• 依托单位: BOSTON UNIVERSITY MEDICAL CAMPUS
• 依托单位国家: 美国
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-06-01 至 2011-05-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8170923
• 关键词: Adhesions; Amino Acids; BCAR3 gene; Breast Cancer Cell; Cancer Cell Growth; Cancer cell line; Cells; Computer Retrieval of Information on Scientific Projects Database; Employee Strikes; Epithelial; Estrogen Antagonists; Family member; Fibronectins; Focal Adhesions; Funding; Grant; Growth; Hour; Institution; MCF7 cell; Mass Spectrum Analysis; Mediating; Mesenchymal; Pattern; Phenotype; Phosphorylation; Proline-Rich Domain; Protein Family; Proteins; Publishing; Research; Research Personnel; Resistance; Resources; SH2D3A gene; SH2D3C gene; Serine; Signal Transduction; Sodium Dodecyl Sulfate-PAGE; Source; Tyrosine Phosphorylation; United States National Institutes of Health; adapter protein; human BCAR1 protein; small hairpin RNA; src-Family Kinases

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. This project seeks to establish why, upon over-expression of a specific protein, AND-34, NSP protein family members associate with p130Cas, a focal adhesion adapter protein best known as a Src substrate that integrates adhesion-related signaling. Over-expression of AND-34/BCAR3/NSP2 (BCAR3), but not NSP1 or NSP3, induces anti-estrogen resistance in human breast cancer cell lines. BCAR3 over-expression in epithelial MCF-7 cells augments levels of a phosphorylated p130Cas species that migrates more slowly on SDS PAGE while NSP-1 and NSP3 induce modest or no phosphorylation, respectively. Conversely, reduction in BCAR3 expression in mesenchymal MDA-231 cells by inducible shRNA results in loss of such p130Cas phosphorylation. Replacement of NSP3's serine/proline-rich domain with that of AND- 34/BCAR3 instills the ability to induce p130Cas phosphorylation. Phospho-amino acid analysis demonstrates that BCAR3 induces p130Cas serine phosphorylation. Mass spectrometry identified phosphorylation at p130Cas serines 139, 437 and 639. p130Cas serine phosphorylation occurs physiologically hours after adhesion of MDA-231 cells to fibronectin and is dependent upon BCAR3 expression. BCAR3 knockdown also alters p130Cas localization and converts MDA-231 growth to an epithelioid pattern characterized by striking cohesiveness and lack of lamellipodial projections at colony borders. These studies suggest that BCAR3 regulates p130Cas serine phosphorylation that is adhesion-dependent, temporally distinct from previously well-characterized rapid Fak and Src kinase-mediated p130Cas tyrosine phosphorylation and that correlates with invasive phenotype. These results were recently published in Cellular Signalling (Makkinje A, Near RI, Infusini G, Vanden Borre P, Bloom A, Cai D, CostelloCE, Lerner A. AND-34/BCAR3 regulates adhesion-dependent p130Cas serine phosphorylation andbreast cancer cell growth pattern.Cell Signal. A Makkinje et al., 2009, 21, 1423-1435).

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