3AK5

Hemoglobin protease (Hbp) passenger missing domain-2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.226 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Role of domains within the autotransporter Hbp/Tsh

Nishimura, K.Yoon, Y.-H.Kurihara, A.Unzai, S.Luirink, J.Park, S.-Y.Tame, J.R.H.

(2010) Acta Crystallogr.,Sect.D 66: 1295-1300

  • DOI: 10.1107/S0907444910036966

  • PubMed Abstract: 
  • The autotransporter Tsh (temperature-sensitive haemagglutinin) secreted by avian pathogenic Escherichia coli was reported in 1994 and the almost identical Hbp (haemoglobin protease) was discovered some years later in isolates from patients suffering ...

    The autotransporter Tsh (temperature-sensitive haemagglutinin) secreted by avian pathogenic Escherichia coli was reported in 1994 and the almost identical Hbp (haemoglobin protease) was discovered some years later in isolates from patients suffering from peritoneal abscesses. However, the function of the protein remains uncertain. The crystal structure of Hbp shows that the protein carries a serine protease domain (domain 1) and a small domain of 75 residues called domain 2 which is inserted into the long β-helix characteristic of autotransporter passenger proteins. In this paper, domain 1 is shown to bind calcium, although metal ions binding to this site do not seem to regulate protease activity. Tsh has been reported to bind red cells and components of the extracellular matrix, but it is demonstrated that these properties are not a consequence of the presence of domain 2.


    Organizational Affiliation

    Yokohama City University, Suehiro 1-7-29, Tsurumi, Yokohama 230-0045, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Hemoglobin-binding protease hbp
A, B, C, D
975Escherichia coliMutation(s): 0 
Gene Names: hbp
EC: 3.4.21.-
Find proteins for O88093 (Escherichia coli)
Go to UniProtKB:  O88093
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A, B, C, D
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.226 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 292.803α = 90.00
b = 53.936β = 107.32
c = 335.953γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
ADSCdata collection
EPMRphasing
REFMACrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-10-06
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-08-09
    Type: Advisory, Refinement description, Source and taxonomy