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7Y6O

Crystal structure of sDscam Ig1-3 domains, isoform alpha25

Summary for 7Y6O
Entry DOI10.2210/pdb7y6o/pdb
DescriptorDown Syndrome Cell Adhesion Molecules, 2-acetamido-2-deoxy-beta-D-glucopyranose (2 entities in total)
Functional Keywordscell surface receptor, cell adhesion
Biological sourceChelicerata
Total number of polymer chains1
Total formula weight32757.99
Authors
Chen, Q.,Yu, Y.,Cheng, J. (deposition date: 2022-06-21, release date: 2023-05-24, Last modification date: 2023-11-29)
Primary citationCheng, J.,Yu, Y.,Wang, X.,Zheng, X.,Liu, T.,Hu, D.,Jin, Y.,Lai, Y.,Fu, T.M.,Chen, Q.
Structural basis for the self-recognition of sDSCAM in Chelicerata.
Nat Commun, 14:2522-2522, 2023
Cited by
PubMed Abstract: To create a functional neural circuit, neurons develop a molecular identity to discriminate self from non-self. The invertebrate Dscam family and vertebrate Pcdh family are implicated in determining synaptic specificity. Recently identified in Chelicerata, a shortened Dscam (sDscam) has been shown to resemble the isoform-generating characters of both Dscam and Pcdh and represent an evolutionary transition. Here we presented the molecular details of sDscam self-recognition via both trans and cis interactions using X-ray crystallographic data and functional assays. Based on our results, we proposed a molecular zipper model for the assemblies of sDscam to mediate cell-cell recognition. In this model, sDscam utilized FNIII domain to form side-by-side interactions with neighboring molecules in the same cell while established hand-in-hand interactions via Ig1 domain with molecules from another cell around. Together, our study provided a framework for understanding the assembly, recognition, and evolution of sDscam.
PubMed: 37130844
DOI: 10.1038/s41467-023-38205-1
PDB entries with the same primary citation
Experimental method
X-RAY DIFFRACTION (3.102 Å)
Structure validation

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