The collagen receptor discoidin domain receptor 1b enhances integrin β1-mediated cell migration by interacting with talin and promoting Rac1 activation.
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Author(s)
Type
Journal Article
Abstract
Integrins and discoidin domain receptors (DDRs) 1 and 2 promote cell adhesion and migration on both fibrillar and non fibrillar collagens. Collagen I contains DDR and integrin selective binding motifs; however, the relative contribution of these two receptors in regulating cell migration is unclear. DDR1 has five isoforms (DDR1a-e), with most cells expressing the DDR1a and DDR1b isoforms. We show that human embryonic kidney 293 cells expressing DDR1b migrate more than DDR1a expressing cells on DDR selective substrata as well as on collagen I in vitro. In addition, DDR1b expressing cells show increased lung colonization after tail vein injection in nude mice. DDR1a and DDR1b differ from each other by an extra 37 amino acids in the DDR1b cytoplasmic domain. Interestingly, these 37 amino acids contain an NPxY motif which is a central control module within the cytoplasmic domain of β integrins and acts by binding scaffold proteins, including talin. Using purified recombinant DDR1 cytoplasmic tail proteins, we show that DDR1b directly binds talin with higher affinity than DDR1a. In cells, DDR1b, but not DDR1a, colocalizes with talin and integrin β1 to focal adhesions and enhances integrin β1-mediated cell migration. Moreover, we show that DDR1b promotes cell migration by enhancing Rac1 activation. Mechanistically DDR1b interacts with the GTPase-activating protein (GAP) Breakpoint cluster region protein (BCR) thus reducing its GAP activity and enhancing Rac activation. Our study identifies DDR1b as a major driver of cell migration and talin and BCR as key players in the interplay between integrins and DDR1b in regulating cell migration.
Date Issued
2022-03-03
Date Acceptance
2022-02-04
Citation
Frontiers in Cell and Developmental Biology, 2022, 10, pp.1-16
ISSN
2296-634X
Publisher
Frontiers Media
Start Page
1
End Page
16
Journal / Book Title
Frontiers in Cell and Developmental Biology
Volume
10
Copyright Statement
© 2022 Borza, Bolas, Zhang, Browning Monroe, Zhang, Meiler, Skwark, Harris, Lapierre, Goldenring, Hook, Rivera, Brown, Leitinger, Tyska, Moser, Böttcher, Zent and Pozzi. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
License URL
Sponsor
Biotechnology and Biological Sciences Research Council (BBSRC)
Biotechnology and Biological Sciences Research Council (BBSRC)
Identifier
https://www.ncbi.nlm.nih.gov/pubmed/35309920
PII: 836797
Grant Number
BB/I011226/1
BB/R006245/1
Subjects
Rac1
extracellular matrix
integrins
migration
receptor activation
receptor tyrosine kinase
Publication Status
Published
Coverage Spatial
Switzerland
Article Number
836797
Date Publish Online
2022-03-03