In:
PLOS ONE, Public Library of Science (PLoS), Vol. 16, No. 6 ( 2021-6-16), p. e0253223-
Abstract:
The calcium-/calmodulin dependent serine protein kinase (CASK) belongs to the membrane-associated guanylate kinases (MAGUK) family of proteins. It fulfils several different cellular functions, ranging from acting as a scaffold protein to transcription control, as well as regulation of receptor sorting. CASK functions depend on the interaction with a variety of partners, for example neurexin, liprin-α, Tbr1 and SAP97. So far, it is uncertain how these seemingly unrelated interactions and resulting functions of CASK are regulated. Here, we show that alternative splicing of CASK can guide the binding affinity of CASK isoforms to distinct interaction partners. We report seven different variants of CASK expressed in the fetal human brain. Four out of these variants are not present in the NCBI GenBank database as known human variants. Functional analyses showed that alternative splicing affected the affinities of CASK variants for several of the tested interaction partners. Thus, we observed a clear correlation of the presence of one splice insert with poor binding of CASK to SAP97, supported by molecular modelling. The alternative splicing and distinct properties of CASK variants in terms of protein-protein interaction should be taken into consideration for future studies.
Type of Medium:
Online Resource
ISSN:
1932-6203
DOI:
10.1371/journal.pone.0253223
DOI:
10.1371/journal.pone.0253223.g001
DOI:
10.1371/journal.pone.0253223.g002
DOI:
10.1371/journal.pone.0253223.g003
DOI:
10.1371/journal.pone.0253223.g004
DOI:
10.1371/journal.pone.0253223.g005
DOI:
10.1371/journal.pone.0253223.g006
DOI:
10.1371/journal.pone.0253223.g007
DOI:
10.1371/journal.pone.0253223.g008
DOI:
10.1371/journal.pone.0253223.g009
DOI:
10.1371/journal.pone.0253223.t001
DOI:
10.1371/journal.pone.0253223.s001
DOI:
10.1371/journal.pone.0253223.s002
DOI:
10.1371/journal.pone.0253223.s003
DOI:
10.1371/journal.pone.0253223.r001
DOI:
10.1371/journal.pone.0253223.r002
DOI:
10.1371/journal.pone.0253223.r003
DOI:
10.1371/journal.pone.0253223.r004
DOI:
10.1371/journal.pone.0253223.r005
DOI:
10.1371/journal.pone.0253223.r006
Language:
English
Publisher:
Public Library of Science (PLoS)
Publication Date:
2021
detail.hit.zdb_id:
2267670-3
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