6U1P

Crystal structure of VpsU (VC0916) from Vibrio cholerae


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.195 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

A tyrosine phosphoregulatory system controls exopolysaccharide biosynthesis and biofilm formation in Vibrio cholerae.

Schwechheimer, C.Hebert, K.Tripathi, S.Singh, P.K.Floyd, K.A.Brown, E.R.Porcella, M.E.Osorio, J.Kiblen, J.T.M.Pagliai, F.A.Drescher, K.Rubin, S.M.Yildiz, F.H.

(2020) PLoS Pathog 16: e1008745-e1008745

  • DOI: 10.1371/journal.ppat.1008745
  • Primary Citation of Related Structures:  
    6U1P, 6U1Q

  • PubMed Abstract: 
  • Production of an extracellular matrix is essential for biofilm formation, as this matrix both secures and protects the cells it encases. Mechanisms underlying production and assembly of matrices are poorly understood. Vibrio cholerae, relies heavily on biofilm formation for survival, infectivity, and transmission ...

    Production of an extracellular matrix is essential for biofilm formation, as this matrix both secures and protects the cells it encases. Mechanisms underlying production and assembly of matrices are poorly understood. Vibrio cholerae, relies heavily on biofilm formation for survival, infectivity, and transmission. Biofilm formation requires Vibrio polysaccharide (VPS), which is produced by vps gene-products, yet the function of these products remains unknown. Here, we demonstrate that the vps gene-products vpsO and vpsU encode respectively for a tyrosine kinase and a cognate tyrosine phosphatase. Collectively, VpsO and VpsU act as a tyrosine phosphoregulatory system to modulate VPS production. We present structures of VpsU and the kinase domain of VpsO, and we report observed autocatalytic tyrosine phosphorylation of the VpsO C-terminal tail. The position and amount of tyrosine phosphorylation in the VpsO C-terminal tail represses VPS production and biofilm formation through a mechanism involving the modulation of VpsO oligomerization. We found that tyrosine phosphorylation enhances stability of VpsO. Regulation of VpsO phosphorylation by the phosphatase VpsU is vital for maintaining native VPS levels. This study provides new insights into the mechanism and regulation of VPS production and establishes general principles of biofilm matrix production and its inhibition.


    Organizational Affiliation

    Department of Microbiology and Environmental Toxicology, University of California-Santa Cruz, Santa Cruz, California, United States of America.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Low molecular weight phosphotyrosine protein phosphataseA, B166Vibrio choleraeMutation(s): 0 
Gene Names: etp
EC: 3.1.3.48
UniProt
Find proteins for Q9KTI6 (Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961))
Explore Q9KTI6 
Go to UniProtKB:  Q9KTI6
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download Ideal Coordinates CCD File 
C [auth B], D [auth B]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.195 
  • Space Group: I 41
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 80.323α = 90
b = 80.323β = 90
c = 105.053γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
iMOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2020-08-19
    Type: Initial release
  • Version 1.1: 2020-10-07
    Changes: Database references