1MAT

STRUCTURE OF THE COBALT-DEPENDENT METHIONINE AMINOPEPTIDASE FROM ESCHERICHIA COLI: A NEW TYPE OF PROTEOLYTIC ENZYME


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Observed: 0.182 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure of the cobalt-dependent methionine aminopeptidase from Escherichia coli: a new type of proteolytic enzyme.

Roderick, S.L.Matthews, B.W.

(1993) Biochemistry 32: 3907-3912

  • DOI: 10.1021/bi00066a009
  • Primary Citation of Related Structures:  
    1MAT

  • PubMed Abstract: 
  • The X-ray structure of Escherichia coli methionine aminopeptidase (MAP) has been determined to 2.4-A resolution and refined to a crystallographic R-factor of 18.2%. The fold is novel and displays internal pseudo-2-fold symmetry which structurally rel ...

    The X-ray structure of Escherichia coli methionine aminopeptidase (MAP) has been determined to 2.4-A resolution and refined to a crystallographic R-factor of 18.2%. The fold is novel and displays internal pseudo-2-fold symmetry which structurally relates the first and second halves of the polypeptide chain. The topology consists of a central antiparallel beta-sheet covered on one side by two pairs of alpha-helices and by a C-terminal loop. The other face of the beta-sheet, together with some irregular loops, forms the active site, which contains two cobalt ions 2.9 A apart. These metal ions are liganded by the side chains of Asp 97, Asp 108, Glu 204, Glu 235, and His 171 with approximate octahedral coordination. In terms of both the novel backbone fold and the constitution of the active site, MAP appears to represent a new class of proteolytic enzyme.


    Related Citations: 
    • Crystallization of Methionine Aminopeptidase from Escherichia Coli
      Roderick, S.L., Matthews, B.W.
      (1988) J Biol Chem 263: 16531
    • Processing of the Initiation Methionine from Proteins: Properties of the Escherichia Coli Methionine Aminopeptidase and its Gene Structure
      Ben-Bassat, A., Bauer, K., Chang, S.-Y., Myambo, K., Boosman, A., Chang, S.
      (1987) J Bacteriol 169: 751

    Organizational Affiliation

    Institute of Molecular Biology, Howard Hughes Medical Institute, University of Oregon, Eugene 97403.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
METHIONYL AMINOPEPTIDASEA264Escherichia coliMutation(s): 0 
EC: 3.4.11.18
Find proteins for P0AE18 (Escherichia coli (strain K12))
Explore P0AE18 
Go to UniProtKB:  P0AE18
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CO
Query on CO

Download CCD File 
A
COBALT (II) ION
Co
XLJKHNWPARRRJB-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Observed: 0.182 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 39α = 90
b = 61.7β = 107.3
c = 54.5γ = 90
Software Package:
Software NamePurpose
TNTrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-01-31
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-11-29
    Changes: Derived calculations, Other