5HXD

Crystal structure of murein-tripeptide amidase MpaA from Escherichia coli O157


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.179 

wwPDB Validation 3D Report Full Report



Literature

Crystal Structure of Murein-Tripeptide Amidase MpaA from Escherichia coli O157 at 2.6 angstrom Resolution

Ma, Y.Bai, G.Cui, Y.Zhao, J.Yuan, Z.Liu, X.

(2017) Protein Pept Lett 24: 181-187

  • DOI: 10.2174/0929866523666161128153128
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Peptidoglycan (PG) is an essential component of the cell wall, and undergoes reconstruction by various PG hydrolases during cell growth, development and division. The murein- tripeptide (Mtp) amidase MpaA belongs to PG hydrolase family and is respons ...

    Peptidoglycan (PG) is an essential component of the cell wall, and undergoes reconstruction by various PG hydrolases during cell growth, development and division. The murein- tripeptide (Mtp) amidase MpaA belongs to PG hydrolase family and is responsible for cleaving the γ-D-Glumeso- Dap amide bond in the Mtp released during PG turnover. The current paper reports the crystal structure of MpaA from Escherichia coli (E. coli) O157 at 2.6 Å resolution. The asymmetric unit consists of two protein molecules and each monomer represents the common α/β fold of metallocarboxypeptidases (MCP). The Tyr133-Asp143 loop appears to mediate the entrance and binding of the substrate into the active groove. A structural comparison of MpaA with its homologue from Vibrio harveyi showed that MpaA has narrower active pocket entrance with a smaller surface opening, which is determined by the Val204-Thr211 loop. The reported structure provides a starting point for the molecular mechanism of MpaA in a significant human pathogen.


    Organizational Affiliation

    No.180 Wusi East Road, Baoding, 071002, Hebei province, China, college of life sciences, Hebei University. China.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein MpaA
A, B
237Escherichia coli O157:H7Mutation(s): 0 
Gene Names: mpaAZ2448ECs1905
EC: 3.4.17
Find proteins for P0ACV7 (Escherichia coli O157:H7)
Go to UniProtKB:  P0ACV7
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CAC
Query on CAC

Download CCD File 
A, B
CACODYLATE ION
C2 H6 As O2
OGGXGZAMXPVRFZ-UHFFFAOYSA-M
 Ligand Interaction
ZN
Query on ZN

Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.172 
  • R-Value Observed: 0.179 
  • Space Group: P 31
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.893α = 90
b = 59.893β = 90
c = 129.87γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Funds of ChinaChina31300056
the Natural Science Foundation of HeBei ProvinceChinaC2014201039
Foundation of Hebei Educational committeeChinaYQ2014007
Natural Science Foundation of Hebei UniversityChina2011-220

Revision History 

  • Version 1.0: 2017-02-08
    Type: Initial release