Biological Assembly 1  

 3D View: Structure

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 7.84 kDa 
• Atom Count: 399 
• Residue Count: 47 
• Unique protein chains: 1

2LJD

monophosphorylated (747pY) beta3 integrin cytoplasmic tail under membrane mimetic conditions

• DOI: 10.2210/pdb2LJD/pdb
• BMRB: 17930

• Classification: MEMBRANE PROTEIN, CELL ADHESION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2011-09-11 Released: 2011-10-05 
• Deposition Author(s): Deshmukh, L., Vinogradova, O.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 15 
• Selection Criteria: structures with the lowest energy 

Literature

Tyrosine phosphorylation as a conformational switch: a case study of integrin Beta3 cytoplasmic tail.

Deshmukh, L., Meller, N., Alder, N., Byzova, T., Vinogradova, O.

(2011) J Biol Chem 286: 40943-40953

• PubMed: 21956114 
• DOI: 10.1074/jbc.M111.231951
• Primary Citation of Related Structures:  
  2LJF, 2LJE, 2LJD


• PubMed Abstract: 
  

Reversible protein phosphorylation is vital for many fundamental cellular processes. The actual impact of adding and removing phosphate group(s) is 3-fold: changes in the local/global geometry, alterations in the electrostatic potential and, as the result of both, modified protein-target interactions. Here we present a comprehensive structural investigation of the effects of phosphorylation on the conformational as well as functional states of a crucial cell surface receptor, α(IIb)β(3) integrin. We have analyzed phosphorylated (Tyr(747) and Tyr(759)) β(3) integrin cytoplasmic tail (CT) primarily by NMR, and our data demonstrate that under both aqueous and membrane-mimetic conditions, phosphorylation causes substantial conformational rearrangements. These changes originate from novel ionic interactions and revised phospholipid binding. Under aqueous conditions, the critical Tyr(747) phosphorylation prevents β(3)CT from binding to its heterodimer partner α(IIb)CT, thus likely maintaining an activated state of the receptor. This conclusion was tested in vivo and confirmed by integrin-dependent endothelial cells adhesion assay. Under membrane-mimetic conditions, phosphorylation results in a modified membrane embedding characterized by significant changes in the secondary structure pattern and the overall fold of β(3)CT. Collectively these data provide unique molecular insights into multiple regulatory roles of phosphorylation.

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Organizational Affiliation: 

Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, Connecticut 06269, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Integrin beta-3	A	67	Homo sapiens	Mutation(s): 0  Gene Names: ITGB3, GP3A
Find proteins for P05106 (Homo sapiens) Explore P05106  Go to UniProtKB:  P05106
NIH Common Fund Data Resources
PHAROS:  P05106 GTEx:  ENSG00000259207

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
PTR	A	L-PEPTIDE LINKING	C9 H12 N O6 P		TYR

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 15 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2LJD Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2011-09-11 
• Released Date: 2011-10-05 
Deposition Author(s): Deshmukh, L., Vinogradova, O.

Revision History 

• Version 1.0: 2011-10-05
  Type: Initial release
  
• Version 1.1: 2013-06-19
  Changes: Database references