FERM domain interaction with myosin negatively regulates FAK in cardiomyocyte hypertrophy

Author(s):Show less -

Santos, Aline M. ^{[1, 2]} ; Schechtman, Deborah ^[3] ; Cardoso, Alisson C. ^{[1, 2]} ; Clemente, Carolina F. M. Z. ^[1] ; Silva, Julio C. ^[1] ; Fioramonte, Mariana ^[4] ; Pereira, Michelle B. M. ^{[1, 2]} ; Marin, Talita M. ^{[1, 2]} ; Oliveira, Paulo S. L. ^[1] ; Figueira, Ana Carolina M. ^[1] ; Oliveira, Saulo H. P. ^[1] ; Torriani, Iris L. ^{[5, 1]} ; Gozzo, Fabio C. ^[4] ; Neto, Jose Xavier ^[1] ; Franchini, Kleber G. ^{[1, 2]}

Affiliation

^[1] Brazilian Assoc Synchrotron Light Technol, Brazilian Natl Lab Biosci, Campinas, SP - Brazil

^[2] Univ Estadual Campinas, Sch Med, Dept Internal Med, Campinas, SP - Brazil

^[3] Univ Sao Paulo, Inst Chem, Dept Biochem, Sao Paulo - Brazil

^[4] Univ Estadual Campinas, Inst Chem, Campinas, SP - Brazil

^[5] Univ Estadual Campinas, Gleb Wataghin Phys Inst, Campinas, SP - Brazil

• Document type: Journal article
• Source: Nature Chemical Biology; v. 8, n. 1, p. 102-110, JAN 2012.
• Web of Science Citations: 14

Abstract

Focal adhesion kinase (FAK) regulates cellular processes that affect several aspects of development and disease. The FAK N-terminal FERM (4.1 protein-ezrin-radixin-moesin homology) domain, a compact clover-leaf structure, binds partner proteins and mediates intramolecular regulatory interactions. Combined chemical cross-linking coupled to MS, small-angle X-ray scattering, computational docking and mutational analyses showed that the FAK FERM domain has a molecular cleft (similar to 998 angstrom(2)) that interacts with sarcomeric myosin, resulting in FAK inhibition. Accordingly, mutations in a unique short amino acid sequence of the FERM myosin cleft, FP-1, impaired the interaction with myosin and enhanced FAK activity in cardiomyocytes. An FP-1 decoy peptide selectively inhibited myosin interaction and increased FAK activity, promoting cardiomyocyte hypertrophy through activation of the AKT-mammalian target of rapamycin pathway. Our findings uncover an inhibitory interaction between the FAK FERM domain and sarcomeric myosin that presents potential opportunities to modulate the cardiac hypertrophic response through changes in FAK activity. (AU)

• FAPESP's process: 06/54878-3 - Pathogenesis of cardiac hypertrophy and failure: mechanisms activated by mechanical stress
• Grantee: Kleber Gomes Franchini
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 08/57805-2 - Institute of Bioanalytics
• Grantee: Lauro Tatsuo Kubota
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 10/02628-9 - Cross-linking coupled to mass spectrometry: FERM/Miosin complex interaction mapping
• Grantee: Mariana Fioramonte
• Support Opportunities: Scholarships in Brazil - Master