crystal structure of cbpa from L. salivarius REN

Experimental Data Snapshot

  • 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 1.2 of the entry. See complete history


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: https://doi.org/10.1038/srep44029
  • Primary Citation of Related Structures:  

  • 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. 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.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Choline binding protein A174Ligilactobacillus salivarius str. RenMutation(s): 0 
Gene Names: LsR_01470
Find proteins for A0A0F7PV22 (Ligilactobacillus salivarius str. Ren)
Explore A0A0F7PV22 
Go to UniProtKB:  A0A0F7PV22
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0F7PV22
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • 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
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Natural Science Foundation of ChinaChina31401668

Revision History  (Full details and data files)

  • Version 1.0: 2017-07-19
    Type: Initial release
  • Version 1.1: 2017-10-18
    Changes: Structure summary
  • Version 1.2: 2023-11-08
    Changes: Data collection, Database references, Derived calculations, Refinement description