SH3RF1 (or POSH) and SH3RF3 (or POSH2) are scaffold proteins that function as E3 ubiquitin-protein ligases. They contain an N-terminal RING finger domain and four SH3 domains []. This entry represents the fourth SH3 domain, located at the C terminus of SH3RF1 and SH3RF3, and similar domains. SH3RF1 plays a role in calcium homeostasis through the control of the ubiquitin domain protein Herp []. It may also have a role in regulating death receptor mediated and JNK mediated apoptosis []. SH3RF3 interacts with p21-activated kinase 2 (PAK2) and GTP-loaded Rac1 [].
SH3RF1 (or POSH) is a scaffold protein that function as an E3 ubiquitin-protein ligase. It contains an N-terminal RING finger domain and four SH3 domains. It belongs to the POSH family, which includes POSH1, POSH2 and POSH3 [].
SH3RF2 is also called POSHER (POSH-eliminating RING protein) or HEPP1 (heart protein phosphatase 1-binding protein). It acts as an anti-apoptotic regulator of the JNK pathway by binding to and promoting the degradation of SH3RF1 (or POSH), a scaffold protein that is required for pro-apoptotic JNK activation []. It may also play a role in cardiac functions together with protein phosphatase 1 []. SH3RF2 contains an N-terminal RING finger domain and three SH3 domains.
SH3RF2 is also called POSHER (POSH-eliminating RING protein) or HEPP1 (heart protein phosphatase 1-binding protein). It acts as an anti-apoptotic regulator of the JNK pathway by binding to and promoting the degradation of SH3RF1 (or POSH), a scaffold protein that is required for pro-apoptotic JNK activation []. It may also play a role in cardiac functions together with protein phosphatase 1 []. SH3RF2 contains an N-terminal RING finger domain and three SH3 domains. This entry represents the second SH3 domain of SH3RF2.
SH3RF2 is also called POSHER (POSH-eliminating RING protein) or HEPP1 (heart protein phosphatase 1-binding protein). It acts as an anti-apoptotic regulator of the JNK pathway by binding to and promoting the degradation of SH3RF1 (or POSH), a scaffold protein that is required for pro-apoptotic JNK activation []. It may also play a role in cardiac functions together with protein phosphatase 1 []. SH3RF2 contains an N-terminal RING finger domain and three SH3 domains. This entry represents the first SH3 domain, located at the N-terminal half, of SH3RF2.
