Napa protein from borrelia burgdorferi

Experimental Data Snapshot

  • Resolution: 2.60 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.242 

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This is version 1.3 of the entry. See complete history


Structure and immunomodulatory property relationship in NapA of Borrelia burgdorferi.

Codolo, G.Papinutto, E.Polenghi, A.D'Elios, M.M.Zanotti, G.de Bernard, M.

(2010) Biochim Biophys Acta 1804: 2191-2197

  • DOI: https://doi.org/10.1016/j.bbapap.2010.09.004
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    NapA from Borrelia burgdorferi is a member of the Dps-like protein family with specific immunomodulatory properties; in particular, NapA is able to induce the expression of IL-23 in neutrophils and monocytes, as well as the expression of IL-6, IL-1β, and transforming growth factor beta (TGF-β) in monocytes, via Toll-like receptor (TLR) 2. Such an activity on innate immune cells triggers a synovial fluid Th17 response. Here we report the crystal structure of NapA, determined at 2.6Å resolution, which shows that the quaternary structure of the protein is that of a dodecamer with 23 symmetry, typical of the proteins of the family. We also demonstrate that the N- and C-terminal tails, which are flexible and not visible in the crystal, are not relevant for its pro-Th17 activity. Based on the crystal structure and on the comparison with the structure of the orthologous protein from Helicobacter pylori, HP-NAP, we hypothesize that the charge distributions on the two proteins' surfaces are responsible for the interaction with TLR2 and for the different behaviors in modulating the immune response.

  • Organizational Affiliation

    Venetian Institute of Molecular Medicine, Via Orus 2, 35129 Padua, Italy.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Neutrophil activating protein
A, B, C, D
151N/AMutation(s): 0 
Gene Names: NAPAnapA
Find proteins for O51633 (Borreliella burgdorferi (strain ATCC 35210 / DSM 4680 / CIP 102532 / B31))
Explore O51633 
Go to UniProtKB:  O51633
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO51633
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.60 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.242 
  • Space Group: H 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.078α = 90
b = 93.078β = 90
c = 227.5γ = 120
Software Package:
Software NamePurpose
MAR345dtbdata collection
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-08-12
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.2: 2016-10-26
    Changes: Database references
  • Version 1.3: 2024-02-21
    Changes: Data collection, Database references, Derived calculations