2LB1

Structure of the second domain of human Smurf1 in complex with a human Smad1 derived peptide

Summary for 2LB1

• Entry DOI: 10.2210/pdb2lb1/pdb
• Related: 2LAW 2LAX 2LAY 2LAZ 2LB0 2LB2 2LB3
• NMR Information: BMRB: 17543
• Descriptor: E3 ubiquitin-protein ligase SMURF1, Mothers against decapentaplegic homolog 1 (2 entities in total)
• Functional Keywords: smurf, smad, cdk, signal transduction, signaling protein-transcription complex, signaling protein/transcription
• Biological source: Homo sapiens (human); More
• Cellular location: Cytoplasm : Q9HCE7 Q15797
• Total number of polymer chains: 2
• Total formula weight: 5648.24

Authors

Macias, M.J.,Aragon, E.,Goerner, N.,Zaromytidou, A.,Xi, Q.,Escobedo, A.,Massague, J. (deposition date: 2011-03-22, release date: 2011-07-06, Last modification date: 2024-11-06)

Primary citation

Aragon, E.,Goerner, N.,Zaromytidou, A.I.,Xi, Q.,Escobedo, A.,Massague, J.,Macias, M.J.
A Smad action turnover switch operated by WW domain readers of a phosphoserine code.
Genes Dev., 25:1275-1288, 2011

PubMed Abstract: When directed to the nucleus by TGF-β or BMP signals, Smad proteins undergo cyclin-dependent kinase 8/9 (CDK8/9) and glycogen synthase kinase-3 (GSK3) phosphorylations that mediate the binding of YAP and Pin1 for transcriptional action, and of ubiquitin ligases Smurf1 and Nedd4L for Smad destruction. Here we demonstrate that there is an order of events-Smad activation first and destruction later-and that it is controlled by a switch in the recognition of Smad phosphoserines by WW domains in their binding partners. In the BMP pathway, Smad1 phosphorylation by CDK8/9 creates binding sites for the WW domains of YAP, and subsequent phosphorylation by GSK3 switches off YAP binding and adds binding sites for Smurf1 WW domains. Similarly, in the TGF-β pathway, Smad3 phosphorylation by CDK8/9 creates binding sites for Pin1 and GSK3, then adds sites to enhance Nedd4L binding. Thus, a Smad phosphoserine code and a set of WW domain code readers provide an efficient solution to the problem of coupling TGF-β signal delivery to turnover of the Smad signal transducers.

PubMed: 21685363
DOI: 10.1101/gad.2060811

Experimental method

SOLUTION NMR