6f2o

Crystal structure of mouse SALM5 adhesion protein extracellular LRR-Ig domain fragment

spinqualitylabelsall models 6f2o, resolution 3.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6f2o is a 1 chain structure with sequence from Mus musculus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 3Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function LRFN5_MOUSE Cell adhesion molecule that mediates homophilic cell-cell adhesion in a Ca(2+)-independent manner. Promotes neurite outgrowth in hippocampal neurons (By similarity). Publication Abstract from PubMed Synaptic adhesion molecules play a crucial role in the regulation of synapse development and maintenance. Recently, several families of leucine-rich repeat (LRR) domain-containing neuronal adhesion molecules have been characterised, including netrin-G ligands, LRRTMs and the synaptic adhesion-like molecule (SALM) family proteins. Most of these are expressed at the excitatory glutamatergic synapses, and dysfunctions of these genes are genetically linked with cognitive disorders, such as autism spectrum disorders and schizophrenia. The SALM family proteins SALM3 and SALM5, similar to SLITRKs, have been shown to bind to the presynaptic receptor protein tyrosine phosphatase (RPTP) family ligands. Here, we present the 3.1 A crystal structure of the SALM5 LRR-Ig-domain construct and biophysical studies that verify the crystallographic results. We show that SALM1, SALM3 and SALM5 form similar dimeric structures, in which the LRR domains form the dimer interface. Both SALM3 and SALM5 bind to RPTP immunoglobulin domains with micromolar affinity. SALM3 shows a clear preference for the RPTP ligands with the meB splice insert. Our structural studies and sequence conservation analysis suggests a ligand-binding site and mechanism for RPTP binding via the dimeric LRR domain region. The structure of SALM5 suggests a dimeric assembly for the presynaptic RPTP ligand recognition.,Karki S, Paudel P, Sele C, Shkumatov AV, Kajander T Protein Eng Des Sel. 2018 Jun 12. pii: 5036097. doi: 10.1093/protein/gzy012. PMID:29897575 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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