2N9Y

Structure of the Integrin alphaIIb-beta3(A711P) Transmembrane Complex


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 21 
  • Conformers Submitted: 21 
  • Selection Criteria: all calculated structures submitted 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural and thermodynamic basis of proline-induced transmembrane complex stabilization.

Schmidt, T.Situ, A.J.Ulmer, T.S.

(2016) Sci Rep 6: 29809-29809

  • DOI: 10.1038/srep29809

  • PubMed Abstract: 
  • In membrane proteins, proline-mediated helix kinks are indispensable for the tight packing of transmembrane (TM) helices. However, kinks invariably affect numerous interhelical interactions, questioning the acceptance of proline substitutions and evo ...

    In membrane proteins, proline-mediated helix kinks are indispensable for the tight packing of transmembrane (TM) helices. However, kinks invariably affect numerous interhelical interactions, questioning the acceptance of proline substitutions and evolutionary origin of kinks. Here, we present the structural and thermodynamic basis of proline-induced integrin αIIbβ3 TM complex stabilization to understand the introduction of proline kinks in membrane proteins. In phospholipid bicelles, the A711P substitution in the center of the β3 TM helix changes the direction of adjacent helix segments to form a 35 ± 2° angle and predominantly repacks the segment in the inner membrane leaflet due to a swivel movement. This swivel repacks hydrophobic and electrostatic interhelical contacts within intracellular lipids, resulting in an overall TM complex stabilization of -0.82 ± 0.01 kcal/mol. Thus, proline substitutions can directly stabilize membrane proteins and such substitutions are proposed to follow the structural template of integrin αIIbβ3(A711P).


    Organizational Affiliation

    Department of Biochemistry &Molecular Biology and Zilkha Neurogenetic Institute, Keck School of Medicine, University of Southern California, 1501 San Pablo Street, Los Angeles, CA 90033, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Integrin alpha-IIb
A
42Homo sapiensMutation(s): 1 
Gene Names: ITGA2B (GP2B, ITGAB)
Find proteins for P08514 (Homo sapiens)
Go to Gene View: ITGA2B
Go to UniProtKB:  P08514
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Integrin beta-3
B
43Homo sapiensMutation(s): 3 
Gene Names: ITGB3 (GP3A)
Find proteins for P05106 (Homo sapiens)
Go to Gene View: ITGB3
Go to UniProtKB:  P05106
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 21 
  • Conformers Submitted: 21 
  • Selection Criteria: all calculated structures submitted 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-08-03
    Type: Initial release