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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:1332774
 [1]; ORCiD logo [2]; ORCiD logo [3]
  1. Department of Chemistry and Biochemistry, The Ohio State University, Columbus, United States, Department of Neuroscience, The Ohio State University, Columbus, United States
  2. Department of Neuroscience, The Ohio State University, Columbus, United States
  3. Department of Chemistry and Biochemistry, The Ohio State University, Columbus, United States

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 in protocadherin-19 (PCDH19) result in a female-limited, infant-onset form of epilepsy (PCDH19-FE). Over 100 mutations in PCDH19 have 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. Additionally, we show that several PCDH19-FE missense mutations localize to the adhesive interface and abolish Pcdh19 adhesion in in vitro assays, thus revealing the biochemical basis of their pathogenic effects during brain development.

Research Organization:
Office of Scientific and Technical Information, Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
GUP 40277; R21MH09463; FR-2015-65794
OSTI ID:
1332774
Alternate ID(s):
OSTI ID: 1332775; OSTI ID: 1375916
Journal Information:
eLife, Journal Name: eLife Vol. 5; ISSN 2050-084X
Publisher:
eLife Sciences Publications, Ltd.Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 56 works
Citation information provided by
Web of Science

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Cited By (8)

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