6N3S

Crystal structure of apo-cruzain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.19 Å
  • R-Value Free: 0.165 
  • R-Value Work: 0.138 
  • R-Value Observed: 0.139 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Cruzain structures: apocruzain and cruzain bound to S-methyl thiomethanesulfonate and implications for drug design.

Barbosa da Silva, E.Dall, E.Briza, P.Brandstetter, H.Ferreira, R.S.

(2019) Acta Crystallogr F Struct Biol Commun 75: 419-427

  • DOI: 10.1107/S2053230X19006320
  • Primary Citation of Related Structures:  
    6N3S, 6O2X

  • PubMed Abstract: 
  • Chagas disease, which is caused by Trypanosoma cruzi, affects more than six million people worldwide. Cruzain is the major cysteine protease involved in the survival of this parasite. Here, the expression, purification and crystallization of this enzyme are reported ...

    Chagas disease, which is caused by Trypanosoma cruzi, affects more than six million people worldwide. Cruzain is the major cysteine protease involved in the survival of this parasite. Here, the expression, purification and crystallization of this enzyme are reported. The cruzain crystals diffracted to 1.2 Å resolution, yielding two novel cruzain structures: apocruzain and cruzain bound to the reversible covalent inhibitor S-methyl thiomethanesulfonate. Mass-spectrometric experiments confirmed the presence of a methylthiol group attached to the catalytic cysteine. Comparison of these structures with previously published structures indicates the rigidity of the cruzain structure. These results provide further structural information about the enzyme and may help in new in silico studies to identify or optimize novel prototypes of cruzain inhibitors.


    Organizational Affiliation

    Laboratório de Modelagem Molecular e Planejamento de Fármacos, Departamento de Bioquímica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CruzipainA, B215Trypanosoma cruziMutation(s): 0 
EC: 3.4.22.51
UniProt
Find proteins for P25779 (Trypanosoma cruzi)
Explore P25779 
Go to UniProtKB:  P25779
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP25779
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.19 Å
  • R-Value Free: 0.165 
  • R-Value Work: 0.138 
  • R-Value Observed: 0.139 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 32.83α = 90
b = 72.21β = 91.53
c = 79.82γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Brazilian National Council for Scientific and Technological Development (CNPq)Brazil--
Austrian Science FundAustria--
Other privateBrazilCAPES
Other privateBrazilL'Oreal-UNESCO

Revision History  (Full details and data files)

  • Version 1.0: 2019-05-29
    Type: Initial release
  • Version 1.1: 2019-07-03
    Changes: Data collection, Database references, Derived calculations
  • Version 1.2: 2020-01-08
    Changes: Author supporting evidence