3G7C

Structure of the Phosphorylation Mimetic of Occludin C-term Tail

• PDB DOI: https://doi.org/10.2210/pdb3G7C/pdb

• Classification: CELL ADHESION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2009-02-09 Released: 2009-05-12 
• Deposition Author(s): Tash, B.R., Sundstrom, J.M., Murakami, T., Flanagan, J.M., Bewley, M.C., Antonetii, D.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.251 
• R-Value Work: 0.236 
• R-Value Observed: 0.240 

Starting Model: experimental

Literature

Identification and analysis of occludin phosphosites: a combined mass spectrometry and bioinformatics approach.

Sundstrom, J.M., Tash, B.R., Murakami, T., Flanagan, J.M., Bewley, M.C., Stanley, B.A., Gonsar, K.B., Antonetti, D.A.

(2009) J Proteome Res 8: 808-817

• PubMed: 19125584 
• DOI: https://doi.org/10.1021/pr7007913
• Primary Citation of Related Structures:  
  3G7C


• PubMed Abstract: 
  

  The molecular function of occludin, an integral membrane component of tight junctions, remains unclear. VEGF-induced phosphorylation sites were mapped on occludin by combining MS data analysis with bioinformatics. In vivo phosphorylation of Ser490 was validated and protein interaction studies combined with crystal structure analysis suggest that Ser490 phosphorylation attenuates the interaction between occludin and ZO-1. This study demonstrates that combining MS data and bioinformatics can successfully identify novel phosphorylation sites from limiting samples.

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Organizational Affiliation: 

Department of Cellular and Molecular Physiology, Penn State University College of Medicine, Hershey, Pennsylvania 17033, USA.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 13.64 kDa 
• Atom Count: 1,021 
• Modelled Residue Count: 109 
• Deposited Residue Count: 113 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Occludin	A	113	Homo sapiens	Mutation(s): 1  Gene Names: OCLN
UniProt & NIH Common Fund Data Resources
Find proteins for Q16625 (Homo sapiens) Explore Q16625  Go to UniProtKB:  Q16625
PHAROS:  Q16625 GTEx:  ENSG00000197822

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.251 
• R-Value Work: 0.236 
• R-Value Observed: 0.240 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 33.054	α = 90
b = 35.591	β = 90
c = 107.396	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
AMoRE	phasing
CNS	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2009-05-12 
Deposition Author(s): Tash, B.R., Sundstrom, J.M., Murakami, T., Flanagan, J.M., Bewley, M.C., Antonetii, D.A.

Revision History  

• Version 1.0: 2009-05-12
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2020-02-26
  Changes: Data collection, Database references
• Version 1.3: 2021-10-20
  Changes: Database references
• Version 1.4: 2023-09-06
  Changes: Data collection, Refinement description