1NYS

Crystal Structure of Activin A Bound to the ECD of ActRIIB P41


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.05 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.252 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structures of an ActRIIB:activin A complex reveal a novel binding mode for TGF-beta ligand:receptor interactions

Thompson, T.B.Woodruff, T.K.Jardetzky, T.S.

(2003) EMBO J. 22: 1555-1566

  • DOI: 10.1093/emboj/cdg156
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The TGF-beta superfamily of ligands and receptors stimulate cellular events in diverse processes ranging from cell fate specification in development to immune suppression. Activins define a major subgroup of TGF-beta ligands that regulate cellular di ...

    The TGF-beta superfamily of ligands and receptors stimulate cellular events in diverse processes ranging from cell fate specification in development to immune suppression. Activins define a major subgroup of TGF-beta ligands that regulate cellular differentiation, proliferation, activation and apoptosis. Activins signal through complexes formed with type I and type II serine/threonine kinase receptors. We have solved the crystal structure of activin A bound to the extracellular domain of a type II receptor, ActRIIB, revealing the details of this interaction. ActRIIB binds to the outer edges of the activin finger regions, with the two receptors juxtaposed in close proximity, in a mode that differs from TGF-beta3 binding to type II receptors. The dimeric activin A structure differs from other known TGF-beta ligand structures, adopting a compact folded-back conformation. The crystal structure of the complex is consistent with recruitment of two type I receptors into a close packed arrangement at the cell surface and suggests that diversity in the conformational arrangements of TGF-beta ligand dimers could influence cellular signaling processes.


    Organizational Affiliation

    Department of Biochemistry, Northwestern University, 2205 Tech Drive, Evanston, IL 60208, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
activin receptor
A, C
105Rattus norvegicusMutation(s): 0 
Gene Names: Acvr2b (Actriib)
EC: 2.7.11.30
Find proteins for P38445 (Rattus norvegicus)
Go to UniProtKB:  P38445
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Inhibin beta A chain
B, D
116Homo sapiensMutation(s): 0 
Gene Names: INHBA
Find proteins for P08476 (Homo sapiens)
Go to Gene View: INHBA
Go to UniProtKB:  P08476
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.05 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.252 
  • Space Group: P 41
Unit Cell:
Length (Å)Angle (°)
a = 104.954α = 90.00
b = 104.954β = 90.00
c = 46.199γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
SCALEPACKdata scaling
BRUTEphasing
BEASTphasing
MAR345data collection
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-04-08
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-11
    Type: Refinement description