8GCE

The Extracellular Domain of Integrin AlphaIIbBeta3 in Intermediate State

  • Classification: CELL ADHESION
  • Organism(s): Homo sapiens
  • Mutation(s): No 

  • Deposited: 2023-03-01 Released: 2024-03-06 
  • Deposition Author(s): Huo, T., Wu, H., Wang, Z.
  • Funding Organization(s): National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.12 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Full-length alpha IIb beta 3 cryo-EM structure reveals intact integrin initiate-activation intrinsic architecture.

Huo, T.Wu, H.Moussa, Z.Sen, M.Dalton, V.Wang, Z.

(2024) Structure 32: 899

  • DOI: https://doi.org/10.1016/j.str.2024.03.006
  • Primary Citation of Related Structures:  
    8GCD, 8GCE

  • PubMed Abstract: 

    Integrin αIIbβ3 is the key receptor regulating platelet retraction and accumulation and a proven drug-target for antithrombotic therapies. Here we resolve the cryo-EM structures of the full-length αIIbβ3, which covers three distinct states along the activation pathway. Firstly, we obtain the αIIbβ3 structure at 3 Å resolution in the inactive state, revealing the overall topology of the heterodimer with the transmembrane (TM) helices and the ligand-binding domain tucked in a specific angle proximity to the TM region. After the addition of a Mn 2+ agonist, we resolve two coexisting structures representing two new states between inactive and active state. Our structures show conformational changes of the αIIbβ3 activating trajectory and a unique twisting of the integrin legs, which is required for platelets accumulation. Our structure provides direct structural evidence for how the lower legs are involved in full-length integrin activation mechanisms and offers a new strategy to target the αIIbβ3 lower leg.


  • Organizational Affiliation

    Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX 77030, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Integrin alpha-IIb1,039Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P08514 (Homo sapiens)
Go to UniProtKB:  P08514
PHAROS:  P08514
GTEx:  ENSG00000005961 
Glycosylation
Glycosylation Sites: 2Go to GlyGen: P08514-1
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Integrin beta-3788Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P05106 (Homo sapiens)
Go to UniProtKB:  P05106
PHAROS:  P05106
GTEx:  ENSG00000259207 
Glycosylation
Glycosylation Sites: 3Go to GlyGen: P05106-1
Sequence Annotations
Expand
  • Reference Sequence
Oligosaccharides

Help

Entity ID: 3
MoleculeChains Length2D Diagram Glycosylation3D Interactions
beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
C, D
3N-Glycosylation
Glycosylation Resources
GlyTouCan:  G15407YE
GlyCosmos:  G15407YE
GlyGen:  G15407YE
Entity ID: 4
MoleculeChains Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
E
2N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
NAG (Subject of Investigation/LOI)
Query on NAG

Download Ideal Coordinates CCD File 
J [auth A],
K [auth A]
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
CA (Subject of Investigation/LOI)
Query on CA

Download Ideal Coordinates CCD File 
F [auth A]
G [auth A]
H [auth A]
I [auth A]
M [auth B]
F [auth A],
G [auth A],
H [auth A],
I [auth A],
M [auth B],
N [auth B]
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
MG (Subject of Investigation/LOI)
Query on MG

Download Ideal Coordinates CCD File 
L [auth B]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.12 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)United StatesR01HL162842

Revision History  (Full details and data files)

  • Version 1.0: 2024-03-06
    Type: Initial release
  • Version 1.1: 2024-04-17
    Changes: Database references
  • Version 1.2: 2024-07-24
    Changes: Data collection, Database references
  • Version 1.3: 2024-10-09
    Changes: Data collection, Structure summary