Crystal Structure of MpPR-1i

Experimental Data Snapshot

  • Resolution: 2.43 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.203 

Starting Model: experimental
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This is version 1.4 of the entry. See complete history


Crystal Structure of MpPR-1i, a SCP/TAPS protein from Moniliophthora perniciosa, the fungus that causes Witches' Broom Disease of Cacao.

Baroni, R.M.Luo, Z.Darwiche, R.Hudspeth, E.M.Schneiter, R.Pereira, G.A.G.Mondego, J.M.C.Asojo, O.A.

(2017) Sci Rep 7: 7818-7818

  • DOI: https://doi.org/10.1038/s41598-017-07887-1
  • Primary Citation of Related Structures:  
    5V50, 5V51

  • PubMed Abstract: 

    The pathogenic fungi Moniliophthora perniciosa causes Witches' Broom Disease (WBD) of cacao. The structure of MpPR-1i, a protein expressed by M. perniciosa when it infects cacao, are presented. This is the first reported de novo structure determined by single-wavelength anomalous dispersion phasing upon soaking with selenourea. Each monomer has flexible loop regions linking the core alpha-beta-alpha sandwich topology that comprise ~50% of the structure, making it difficult to generate an accurate homology model of the protein. MpPR-1i is monomeric in solution but is packed as a high ~70% solvent content, crystallographic heptamer. The greatest conformational flexibility between monomers is found in loops exposed to the solvent channel that connect the two longest strands. MpPR-1i lacks the conserved CAP tetrad and is incapable of binding divalent cations. MpPR-1i has the ability to bind lipids, which may have roles in its infection of cacao. These lipids likely bind in the palmitate binding cavity as observed in tablysin-15, since MpPR-1i binds palmitate with comparable affinity as tablysin-15. Further studies are required to clarify the possible roles and underlying mechanisms of neutral lipid binding, as well as their effects on the pathogenesis of M. perniciosa so as to develop new interventions for WBD.

  • Organizational Affiliation

    Genomics and Expression Laboratory (LGE), Institute of Biology, CP 6109, 13083-862 UNICAMP, Campinas, Brazil.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PR-1 protein
A, B, C, D, E
A, B, C, D, E, F, G
175Moniliophthora perniciosaMutation(s): 0 
Gene Names: PR-1i
Find proteins for H6U756 (Moniliophthora perniciosa)
Explore H6U756 
Go to UniProtKB:  H6U756
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupH6U756
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.43 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.203 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 106.304α = 90
b = 84.085β = 111.35
c = 130.882γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Sao Paulo Research Foundation (FAPESP)BrazilSMOLBnet 2.0 grant 2010/51884-8

Revision History  (Full details and data files)

  • Version 1.0: 2017-08-30
    Type: Initial release
  • Version 1.1: 2018-01-17
    Changes: Author supporting evidence
  • Version 1.2: 2019-04-17
    Changes: Author supporting evidence, Data collection
  • Version 1.3: 2020-01-01
    Changes: Author supporting evidence
  • Version 1.4: 2023-10-04
    Changes: Data collection, Database references, Refinement description