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-Structure paper
| タイトル | Structural Characterization of the Extracellular Domain of CASPR2 and Insights into Its Association with the Novel Ligand Contactin1. |
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| ジャーナル・号・ページ | J Biol Chem, Vol. 291, Issue 11, Page 5788-5802, Year 2016 |
| 掲載日 | 2016年3月11日 |
著者 | Eva N Rubio-Marrero / Gabriele Vincelli / Cy M Jeffries / Tanvir R Shaikh / Irene S Pakos / Fanomezana M Ranaivoson / Sventja von Daake / Borries Demeler / Antonella De Jaco / Guy Perkins / Mark H Ellisman / Jill Trewhella / Davide Comoletti / ![]() |
| PubMed 要旨 | Contactin-associated protein-like 2 (CNTNAP2) encodes for CASPR2, a multidomain single transmembrane protein belonging to the neurexin superfamily that has been implicated in a broad range of human ...Contactin-associated protein-like 2 (CNTNAP2) encodes for CASPR2, a multidomain single transmembrane protein belonging to the neurexin superfamily that has been implicated in a broad range of human phenotypes including autism and language impairment. Using a combination of biophysical techniques, including small angle x-ray scattering, single particle electron microscopy, analytical ultracentrifugation, and bio-layer interferometry, we present novel structural and functional data that relate the architecture of the extracellular domain of CASPR2 to a previously unknown ligand, Contactin1 (CNTN1). Structurally, CASPR2 is highly glycosylated and has an overall compact architecture. Functionally, we show that CASPR2 associates with micromolar affinity with CNTN1 but, under the same conditions, it does not interact with any of the other members of the contactin family. Moreover, by using dissociated hippocampal neurons we show that microbeads loaded with CASPR2, but not with a deletion mutant, co-localize with transfected CNTN1, suggesting that CNTN1 is an endogenous ligand for CASPR2. These data provide novel insights into the structure and function of CASPR2, suggesting a complex role of CASPR2 in the nervous system. |
リンク | J Biol Chem / PubMed:26721881 / PubMed Central |
| 手法 | SAS (X-ray in house) |
| 構造データ | ![]() SASDBR2: |
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Homo sapiens (ヒト)