2QJ9

Crystal structure analysis of BMP-2 in complex with BMPR-IA variant B1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.44 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.197 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure analysis of bone morphogenetic protein-2 type I receptor complexes reveals a mechanism of receptor inactivation in juvenile polyposis syndrome.

Kotzsch, A.Nickel, J.Seher, A.Heinecke, K.van Geersdaele, L.Herrmann, T.Sebald, W.Mueller, T.D.

(2008) J.Biol.Chem. 283: 5876-5887

  • DOI: 10.1074/jbc.M706029200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Bone morphogenetic proteins regulate many developmental processes during embryogenesis as well as tissue homeostasis in the adult. Signaling of bone morphogenetic proteins (BMPs) is accomplished by binding to two types of serine/threonine kinase tran ...

    Bone morphogenetic proteins regulate many developmental processes during embryogenesis as well as tissue homeostasis in the adult. Signaling of bone morphogenetic proteins (BMPs) is accomplished by binding to two types of serine/threonine kinase transmembrane receptors termed type I and type II. Because a large number of ligands signal through a limited number of receptors, ligand-receptor interaction in the BMP superfamily is highly promiscuous, with a ligand binding to various receptors and a receptor binding many different BMP ligands. In this study we investigate the interaction of BMP-2 with its two high affinity type I receptors, BMP receptors IA (BMPR-IA) and BMPR-IB. Interestingly, 50% of the residues in the BMP-2 binding epitope of the BMPR-IA receptor are exchanged in BMPR-IB without a decrease in binding affinity or specificity for BMP-2. Our structural and functional analyses show that promiscuous binding of BMP-2 to both type I receptors is achieved by inherent backbone and side-chain flexibility as well as by variable hydration of the ligand-receptor interface enabling the BMP-2 surface to adapt to different receptor geometries. Despite the high degree of amino acid variability found in BMPR-IA and BMPR-IB binding equally to BMP-2, three single point missense mutations in the ectodomain of BMPR-IA cannot be tolerated. In juvenile polyposis syndrome these mutations have been shown to inactivate BMPR-IA. On the basis of our biochemical and biophysical analyses, we can show that the mutations, which are located outside the ligand binding epitope, alter the local or global fold of the receptor, thereby inactivating BMPR-IA and causing a loss of the BMP-2 tumor suppressor function in colon epithelial cells.


    Organizational Affiliation

    Lehrstuhl für Botanik I-Molekulare Pflanzenphysiologie und Biophysik, Julius-von-Sachs-Institut der Universität Würzburg, Julius-von-Sachs-Platz 2, D-97082 Würzburg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Bone morphogenetic protein 2
B, A
116Homo sapiensMutation(s): 0 
Gene Names: BMP2 (BMP2A)
Find proteins for P12643 (Homo sapiens)
Go to Gene View: BMP2
Go to UniProtKB:  P12643
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Bone morphogenetic protein receptor type IA
D, C
135Homo sapiensMutation(s): 7 
Gene Names: BMPR1A (ACVRLK3, ALK3)
EC: 2.7.11.30
Find proteins for P36894 (Homo sapiens)
Go to Gene View: BMPR1A
Go to UniProtKB:  P36894
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.44 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.197 
  • Space Group: P 65
Unit Cell:
Length (Å)Angle (°)
a = 105.961α = 90.00
b = 105.961β = 90.00
c = 96.789γ = 120.00
Software Package:
Software NamePurpose
CrystalCleardata scaling
REFMACrefinement
CrystalCleardata reduction
PHASERphasing
MAR345dtbdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-01-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance