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Title: Structural determinants of adhesion by Protocadherin-19 and implications for its role in epilepsy

Journal Article · · eLife
DOI:https://doi.org/10.7554/eLife.18529· OSTI ID:1334804

Non-clustered δ-protocadherins are homophilic cell adhesion molecules essential for the development of the vertebrate nervous system, as several are closely linked to neurodevelopmental disorders. Mutations inprotocadherin-19(PCDH19) result in a female-limited, infant-onset form of epilepsy (PCDH19-FE). Over 100 mutations inPCDH19have been identified in patients with PCDH19-FE, about half of which are missense mutations in the adhesive extracellular domain. Neither the mechanism of homophilic adhesion by PCDH19, nor the biochemical effects of missense mutations are understood. Here we present a crystallographic structure of the minimal adhesive fragment of the zebrafish Pcdh19 extracellular domain. This structure reveals the adhesive interface for Pcdh19, which is broadly relevant to both non-clustered δ and clustered protocadherin subfamilies. In addition, we show that several PCDH19-FE missense mutations localize to the adhesive interface and abolish Pcdh19 adhesion inin vitroassays, thus revealing the biochemical basis of their pathogenic effects during brain development.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
DOE - BASIC ENERGY SCIENCESUNIVERSITYNIHOTHER
OSTI ID:
1334804
Journal Information:
eLife, Vol. 5, Issue 2016; ISSN 2050-084X
Publisher:
eLife Sciences Publications, Ltd.
Country of Publication:
United States
Language:
ENGLISH

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Cited By (8)

Novel and de novo mutation of PCDH19 in Girls Clustering Epilepsy journal November 2019
The Role of Protocadherin 19 (PCDH19) in Neurodevelopment and in the Pathophysiology of Early Infantile Epileptic Encephalopathy-9 (EIEE9): PCDH19 and Neurons journal January 2019
A mutation update for the PCDH19 gene causing early-onset epilepsy in females with an unusual expression pattern journal January 2019
Regulation of neural circuit formation by protocadherins journal June 2017
Identification of an adhesive interface for the non-clustered δ1 protocadherin-1 involved in respiratory diseases journal September 2019
An adhesion code ensures robust pattern formation during tissue morphogenesis journal October 2019
Affinity capture of polyribosomes followed by RNAseq (ACAPseq), a discovery platform for protein-protein interactions journal October 2018
Tuning of delta-protocadherin adhesion through combinatorial diversity journal December 2018

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