Cited by 317TGF-β signaling in diseasesProtein Kinase Regulation and GTPase SignalingDevelopmental Biology and Gene Regulation

The DOI matches its Crossref record; 62 of the 63 references it cites were found in a registry or an index, and 1 are not checked yet.

Activation of Signalling by the Activin Receptor Complex

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Abstract

Activin exerts its effects by simultaneously binding to two types of p rotein serine/threonine kinase receptors, each type existing in various isoforms. Using the ActR-IB and ActR-IIB receptor isoforms, we have investigated the mechanism of activin receptor activation. ActR-IIB are phosphoproteins with demonstrable affinity for each other. However, activin addition strongly promotes an interaction between these two proteins. Activin binds directly to ActR-IIB, and this complex associates with ActR-IB, which does not bind ligand on its own. In the resulting complex, ActR-IB becomes hyperphosphorylated, and this requires the kinase activity of ActR-IIB. Mutation of conserved serines and threonines in the GS domain, a region just upstream of the kinase domain in ActR-IB, abrogates both phosphorylation and signal propagation, suggesting that this domain contains phosphorylation sites required for signalling. ActR-IB activation can be mimicked by mutation of Thr-206 to aspartic acid, which yields a construct, ActR-IB(T206D), that signals in the absence of ligand. Furthermore, the signalling activity of this mutant construct is undisturbed by overexpression of a dominant negative kinase-defective ActR-IIB construct, indicating that ActR-IB(T206D) can signal independently of ActR-IIB. The evidence suggests that ActR-IIB acts as a primary activin receptor and ActR-IB acts as a downstream transducer of activin signals.

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Crossref · 10.1128/mcb.16.3.1066

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  1. Harlow E., 1988, Antibodies: a laboratory handbook
  2. Wrana J. L., 1994, Mol. Cell. Biol., 14, 944

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Metadata

Authors
Attisano, L., Wrana, J. L., Montalvo, E., & Massagué, J.
Affiliations
Memorial Sloan Kettering Cancer Center (US)
Venue
Molecular and Cellular Biology
Published
1996-03-01
Volume
16
Issue
3
Pages
1066-1073
ISSN
  • 0270-7306 (ISSN-L)
  • 1098-5549
OpenAlex
W2103042473
Cited by
316
References
62
Citations by year
2026: 1 · 2025: 7 · 2024: 2 · 2023: 6 · 2022: 4 · 2021: 9 · 2020: 6 · 2019: 9 · 2018: 9 · 2017: 2 · 2016: 12 · 2015: 4 · 2014: 3 · 2013: 4 · 2012: 5
FWCI
9.35
Type
journal article
Language
en
Open access
Locations
  • Molecular and Cellular Biology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Cancer Institute (CA34610)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › TGF-β signaling in diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
Keywords
activin signalling, receptor activation, receptor phosphorylation, receptor kinase activity, signal transduction
MeSH terms
Amino Acid Sequence, Animals, Cell Line, Ligands, Molecular Sequence Data, Mutation, Transfection, Signal Transduction, Protein Serine-Threonine Kinases, Receptors, Growth Factor, Activin Receptors

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