Sab (SH3BP5), a novel mitochondria-localized JNK-interacting protein

Wiltshire, C., Gillespie, D.A.F. and May, G.H.W. (2004) Sab (SH3BP5), a novel mitochondria-localized JNK-interacting protein. Biochemical Society Transactions, 32(6), pp. 1075-1077. (doi: 10.1042/BST0321075) (PMID:15506969)

Abstract

The JNK (c-Jun N-terminal kinase) pathway is activated by diverse stresses and can have an effect on a number of different cellular processes. Protein-protein interactions are critical for efficient signalling from JNK to multiple targets; through a screen for interacting proteins, we identified a novel JNK-interacting protein, Sab (SH3BP5). Sab has previously been found to interact with the Src homology 3 domain of Bruton's tyrosine kinase; however, the interaction with JNK occurs through a mitogen-activated protein KIM (kinase interaction motif) in a region distinct from the Bruton's tyrosine kinase-binding domain. As with c-Jun, the presence of this KIM is essential for Sab to act as a JNK substrate. Interestingly, Sab is associated with the mitochondria and co-localizes with a portion of active JNK after stress treatment. The present study and previously reported work may suggest a possible role for Sab in targeting JNK to this subcellular compartment and/or mediating crosstalk between different signal-transduction pathways.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Gillespie, Professor David and May, Dr Gerhard
• Authors: Wiltshire, C., Gillespie, D.A.F., and May, G.H.W.
• College/School: College of Medical Veterinary and Life Sciences > School of Cancer Sciences; College of Medical Veterinary and Life Sciences > School of Medicine, Dentistry & Nursing
• Journal Name: Biochemical Society Transactions
• Publisher: Portland Press
• ISSN: 0300-5127
• ISSN (Online): 1470-8752