Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 5.65 kDa 
• Atom Count: 385 
• Modelled Residue Count: 49 
• Deposited Residue Count: 51 
• Unique protein chains: 2

2LB1

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

• PDB DOI: 10.2210/pdb2LB1/pdb
• BMRB: 17543

• Classification: SIGNALING PROTEIN/TRANSCRIPTION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2011-03-22 Released: 2011-07-06 
• Deposition Author(s): Macias, M.J., Aragon, E., Goerner, N., Zaromytidou, A., Xi, Q., Escobedo, A., Massague, J.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 300 
• Conformers Submitted: 20 
• Selection Criteria: structures with acceptable covalent geometry 

Literature

A Smad action turnover switch operated by WW domain readers of a phosphoserine code.

Aragon, E., Goerner, N., Zaromytidou, A.I., Xi, Q., Escobedo, A., Massague, J., Macias, M.J.

(2011) Genes Dev 25: 1275-1288

• PubMed: 21685363 
• DOI: 10.1101/gad.2060811
• Primary Citation of Related Structures:  
  2LAJ, 2LAW, 2LAX, 2LAY, 2LAZ, 2LB0, 2LB1, 2LB2, 2LB3


• 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.

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Organizational Affiliation: 

Structural and Computational Biology Programme, Institute for Research in Biomedicine, Barcelona, Spain.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
E3 ubiquitin-protein ligase SMURF1	A	36	Homo sapiens	Mutation(s): 0  Gene Names: SMURF1, KIAA1625 EC: 6.3.2 (PDB Primary Data), 2.3.2.26 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for Q9HCE7 (Homo sapiens) Explore Q9HCE7  Go to UniProtKB:  Q9HCE7
PHAROS:  Q9HCE7 GTEx:  ENSG00000198742

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Mothers against decapentaplegic homolog 1	B	15	Homo sapiens	Mutation(s): 0  Gene Names: SMAD1, BSP1, MADH1, MADR1
UniProt & NIH Common Fund Data Resources
Find proteins for Q15797 (Homo sapiens) Explore Q15797  Go to UniProtKB:  Q15797
PHAROS:  Q15797 GTEx:  ENSG00000170365

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 300 
• Conformers Submitted: 20 
• Selection Criteria: structures with acceptable covalent geometry 
• OLDERADO: 2LB1 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2011-03-22 
• Released Date: 2011-07-06 
Deposition Author(s): Macias, M.J., Aragon, E., Goerner, N., Zaromytidou, A., Xi, Q., Escobedo, A., Massague, J.

Revision History  

• Version 1.0: 2011-07-06
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2016-04-27
  Changes: Structure summary