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Two Different Subunits Associate to Create Isoform-Specific Platelet-derived Growth Factor Receptors

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Seifert, R A, Hart, C E, Phillips, P E, Forstrom, J W, Ross, R, Murray, M J, Bowen-Pope, D F·1989·Journal of Biological Chemistry

Abstract

Recent evidence has demonstrated that there is more than one form of platelet-derived growth factor (PDGF) receptor and that these receptors differ in their specificity for the multiple isoforms of PDGF. We present evidence that high affinity binding of PDGF requires association of two different receptor subunits: an alpha-subunit that can bind either a B- or an A-chain of PDGF, and a beta-subunit that can bind only a B-chain. The alpha- and beta-subunits appear to be similar in size but can be distinguished by binding specificity and by an antireceptor monoclonal antibody, PR7212, which recognizes only the beta-subunit. In the absence of PDGF, these subunits either exist separately or form rapidly reversible complexes. In the presence of PDGF, receptor subunits of appropriate specificity interact with a PDGF molecule to form a high affinity complex. Both the absolute and relative numbers of these two PDGF receptor subunits vary on different cell types and correspond to differences in the mitogenic sensitivity of cells to the different PDGF isoforms.

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Metadata

Authors
Seifert, R. A., Hart, C. E., Phillips, P. E., Forstrom, J. W., Ross, R., Murray, M. J., & Bowen-Pope, D. F.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1989-05
Volume
264
Issue
15
Pages
8771-8778
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1493414055
Cited by
610
References
0
FWCI
22.81
Type
journal article
Language
en
Open access
hybrid

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Seifert, R. A., Hart, C. E., Phillips, P. E., Forstrom, J. W., Ross, R., Murray, M. J., & Bowen-Pope, D. F. (1989). Two Different Subunits Associate to Create Isoform-Specific Platelet-derived Growth Factor Receptors. Journal of Biological Chemistry. https://doi.org/10.1016/s0021-9258(18)81860-9

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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