5GT1

crystal structure of cbpa from L. salivarius REN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.173 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The Adhesion of Lactobacillus salivarius REN to a Human Intestinal Epithelial Cell Line Requires S-layer Proteins

Wang, R.Jiang, L.Zhang, M.Zhao, L.Hao, Y.Guo, H.Sang, Y.Zhang, H.Ren, F.

(2017) Sci Rep 7: 44029-44029

  • DOI: 10.1038/srep44029
  • Primary Citation of Related Structures:  
    5GT1

  • PubMed Abstract: 
  • Lactobacillus salivarius REN, a novel probiotic isolated from Chinese centenarians, can adhere to intestinal epithelial cells and subsequently colonize the host. We show here that the surface-layer protein choline-binding protein A (CbpA) of L. saliv ...

    Lactobacillus salivarius REN, a novel probiotic isolated from Chinese centenarians, can adhere to intestinal epithelial cells and subsequently colonize the host. We show here that the surface-layer protein choline-binding protein A (CbpA) of L. salivarius REN was involved in adherence to the human colorectal adenocarcinoma cell line HT-29. Adhesion of a cbpA deletion mutant was significantly reduced compared with that of wild-type, suggesting that CbpA acts as an adhesin that mediates the interaction between the bacterium and its host. To identify the molecular mechanism of adhesion, we determined the crystal structure of a truncated form of CbpA that is likely involved in binding to its cell-surface receptor. The crystal structure identified CbpA as a peptidase of the M23 family whose members harbor a zinc-dependent catalytic site. Therefore, we propose that CbpA acts as a multifunctional surface protein that cleaves the host extracellular matrix and participates in adherence. Moreover, we identified enolase as the CbpA receptor on the surface of HT-29 cells. The present study reveals a new class of surface-layer proteins as well as the molecular mechanism that may contribute to the ability of L. salivarius REN to colonize the human gut.


    Organizational Affiliation

    Beijing Advanced Innovation Center for Food Nutrition and Human Health, China Agricultural University, Beijing 100083, P. R. China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Choline binding protein AA174Lactobacillus salivarius str. RenMutation(s): 0 
Gene Names: LsR_01470
Find proteins for A0A0F7PV22 (Lactobacillus salivarius str. Ren)
Explore A0A0F7PV22 
Go to UniProtKB:  A0A0F7PV22
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

Download CCD File 
A
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

Download CCD File 
A
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.173 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 95.724α = 90
b = 95.724β = 90
c = 39.318γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
BALBESphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2016-08-18 
  • Released Date: 2017-07-19 
  • Deposition Author(s): Jiang, L., Ren, F.

Funding OrganizationLocationGrant Number
National Natural Science Foundation of ChinaChina31401668

Revision History 

  • Version 1.0: 2017-07-19
    Type: Initial release
  • Version 1.1: 2017-10-18
    Changes: Structure summary