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TitleStructural Basis for Teneurin Function in Circuit-Wiring: A Toxin Motif at the Synapse.
Journal, issue, pagesCell, Vol. 173, Issue 3, Page 735-748.e15, Year 2018
Publish dateApr 19, 2018
AuthorsJingxian Li / Moran Shalev-Benami / Richard Sando / Xian Jiang / Amanuel Kibrom / Jie Wang / Katherine Leon / Christopher Katanski / Olha Nazarko / Yue C Lu / Thomas C Südhof / Georgios Skiniotis / Demet Araç /
PubMed AbstractTeneurins (TENs) are cell-surface adhesion proteins with critical roles in tissue development and axon guidance. Here, we report the 3.1-Å cryoelectron microscopy structure of the human TEN2 ...Teneurins (TENs) are cell-surface adhesion proteins with critical roles in tissue development and axon guidance. Here, we report the 3.1-Å cryoelectron microscopy structure of the human TEN2 extracellular region (ECR), revealing a striking similarity to bacterial Tc-toxins. The ECR includes a large β barrel that partially encapsulates a C-terminal domain, which emerges to the solvent through an opening in the mid-barrel region. An immunoglobulin (Ig)-like domain seals the bottom of the barrel while a β propeller is attached in a perpendicular orientation. We further show that an alternatively spliced region within the β propeller acts as a switch to regulate trans-cellular adhesion of TEN2 to latrophilin (LPHN), a transmembrane receptor known to mediate critical functions in the central nervous system. One splice variant activates trans-cellular signaling in a LPHN-dependent manner, whereas the other induces inhibitory postsynaptic differentiation. These results highlight the unusual structural organization of TENs giving rise to their multifarious functions.
External linksCell / PubMed:29677516 / PubMed Central
MethodsEM (single particle)
Resolution3.1 Å
Structure data

7526

6cmx

EMDB-7526, PDB-6cmx:
Human Teneurin 2 extra-cellular region
Method: EM (single particle) / Resolution: 3.1 Å

Chemicals

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose / N-Acetylglucosamine

ChemComp-MAN:
alpha-D-mannopyranose / Mannose

Source
  • homo sapiens (human)
KeywordsMEMBRANE PROTEIN / Teneurin / CNS

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