3DWC

Trypanosoma Cruzi Metallocarboxypeptidase 1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.180 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The molecular analysis of Trypanosoma cruzi metallocarboxypeptidase 1 provides insight into fold and substrate specificity

Niemirowicz, G.Fernandez, D.Sola, M.Cazzulo, J.J.Aviles, F.X.Gomis-Ruth, F.X.

(2008) Mol Microbiol 70: 853-866

  • DOI: https://doi.org/10.1111/j.1365-2958.2008.06444.x
  • Primary Citation of Related Structures:  
    3DWC

  • PubMed Abstract: 

    Trypanosoma cruzi is the aetiological agent of Chagas' disease, a chronic infection that affects millions in Central and South America. Proteolytic enzymes are involved in the development and progression of this disease and two metallocarboxypeptidases, isolated from T. cruzi CL Brener clone, have recently been characterized: TcMCP-1 and TcMCP-2. Although both are cytosolic and closely related in sequence, they display different temporary expression patterns and substrate preferences. TcMCP-1 removes basic C-terminal residues, whereas TcMCP-2 prefers hydrophobic/aromatic residues. Here we report the three-dimensional structure of TcMCP-1. It resembles an elongated cowry, with a long, deep, narrow active-site cleft mimicking the aperture. It has an N-terminal dimerization subdomain, involved in a homodimeric catalytically active quaternary structure arrangement, and a proteolytic subdomain partitioned by the cleft into an upper and a lower moiety. The cleft accommodates a catalytic metal ion, most likely a cobalt, which is co-ordinated by residues included in a characteristic zinc-binding sequence, HEXXH and a downstream glutamate. The structure of TcMCP-1 shows strong topological similarity with archaeal, bacterial and mammalian metallopeptidases including angiotensin-converting enzyme, neurolysin and thimet oligopeptidase. A crucial residue for shaping the S(1') pocket in TcMCP-1, Met-304, was mutated to the respective residue in TcMCP-2, an arginine, leading to a TcMCP-1 variant with TcMCP-2 specificity. The present studies pave the way for a better understanding of a potential target in Chagas' disease at the molecular level and provide a template for the design of novel therapeutic approaches.


  • Organizational Affiliation

    Instituto de Investigaciones Biotecnológicas-Instituto Tecnológico de Chascomús (IIB-INTECH), Universidad Nacional de General San Martín-CONICET, Avenida General Paz 5445, AR-1650 San Martín, Buenos Aires, Argentina.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Metallocarboxypeptidase
A, B, C, D
505Trypanosoma cruziMutation(s): 0 
Gene Names: mcar-1
EC: 3.4.17.19
UniProt
Find proteins for Q6ZXC0 (Trypanosoma cruzi)
Explore Q6ZXC0 
Go to UniProtKB:  Q6ZXC0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ6ZXC0
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download Ideal Coordinates CCD File 
AA [auth C]
BA [auth C]
CA [auth C]
EA [auth D]
F [auth A]
AA [auth C],
BA [auth C],
CA [auth C],
EA [auth D],
F [auth A],
FA [auth D],
G [auth A],
H [auth A],
R [auth B],
S [auth B],
T [auth B],
U [auth B],
V [auth B]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
GOL
Query on GOL

Download Ideal Coordinates CCD File 
I [auth A]
J [auth A]
K [auth A]
L [auth A]
M [auth A]
I [auth A],
J [auth A],
K [auth A],
L [auth A],
M [auth A],
N [auth A],
W [auth B],
X [auth B],
Y [auth B]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
ALA
Query on ALA

Download Ideal Coordinates CCD File 
P [auth B]ALANINE
C3 H7 N O2
QNAYBMKLOCPYGJ-REOHCLBHSA-N
GLY
Query on GLY

Download Ideal Coordinates CCD File 
O [auth B]GLYCINE
C2 H5 N O2
DHMQDGOQFOQNFH-UHFFFAOYSA-N
CO
Query on CO

Download Ideal Coordinates CCD File 
DA [auth D],
E [auth A],
Q [auth B],
Z [auth C]
COBALT (II) ION
Co
XLJKHNWPARRRJB-UHFFFAOYSA-N
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
CSX
Query on CSX
A, B, C, D
L-PEPTIDE LINKINGC3 H7 N O3 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.180 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 89.4α = 90
b = 136.25β = 103.06
c = 117.86γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
ADSCdata collection
XDSdata reduction
SCALAdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-09-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2023-11-01
    Changes: Data collection, Database references, Derived calculations, Refinement description