Structural highlights
Function
[CSKI1_HUMAN] May link the scaffolding protein CASK to downstream intracellular effectors (By similarity).
Publication Abstract from PubMed
The synaptic scaffolding proteins CASK and Caskin1 are part of the fibrous mesh of proteins that organize the active zones of neural synapses. CASK binds to a region of Caskin1 called the CASK interaction domain (CID). Adjacent to the CID, Caskin1 contains two tandem sterile alpha motif (SAM) domains. Many SAM domains form polymers so they are good candidates for forming the fibrous structures seen in the active zone. We show here that the SAM domains of Caskin1 form a new type of SAM helical polymer. The Caskin1 polymer interface exhibits a remarkable segregation of charged residues, resulting in a high sensitivity to ionic strength in vitro. The Caskin1 polymers can be decorated with CASK proteins, illustrating how these proteins may work together to organize the cytomatrix in active zones.
Tandem SAM domain structure of human Caskin1: a presynaptic, self-assembling scaffold for CASK.,Stafford RL, Hinde E, Knight MJ, Pennella MA, Ear J, Digman MA, Gratton E, Bowie JU Structure. 2011 Dec 7;19(12):1826-36. PMID:22153505[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Stafford RL, Hinde E, Knight MJ, Pennella MA, Ear J, Digman MA, Gratton E, Bowie JU. Tandem SAM domain structure of human Caskin1: a presynaptic, self-assembling scaffold for CASK. Structure. 2011 Dec 7;19(12):1826-36. PMID:22153505 doi:10.1016/j.str.2011.09.018
