2MNI

Chemical Shift Assignments and structure of Q4D059, a hypothetical protein from Trypanosoma cruzi


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

NMR structure and dynamics of Q4D059, a kinetoplastid-specific and conserved protein from Trypanosoma cruzi.

Lopez-Castilla, A.Pons, T.Pires, J.R.

(2015) J.Struct.Biol. 190: 11-20

  • DOI: 10.1016/j.jsb.2015.02.007

  • PubMed Abstract: 
  • Q4D059 (UniProt accession number), is an 86-residue protein from Trypanosoma cruzi, conserved in the related kinetoplastid parasites Trypanosoma brucei and Leishmania major. These pathogens are the causal agents of the neglected diseases: Chagas, sle ...

    Q4D059 (UniProt accession number), is an 86-residue protein from Trypanosoma cruzi, conserved in the related kinetoplastid parasites Trypanosoma brucei and Leishmania major. These pathogens are the causal agents of the neglected diseases: Chagas, sleeping sickness and leishmaniases respectively and had recently their genomes sequenced. Q4D059 shows low sequence similarity with mammal proteins and because of its essentiality demonstrated in T. brucei, it is a potential target for anti-parasitic drugs. The 11 hypothetical proteins homologous to Q4D059 are all uncharacterized proteins of unknown function. Here, the solution structure of Q4D059 was solved by NMR and its backbone dynamics was characterized by (15)N relaxation parameters. The structure is composed by a parallel/anti-parallel three-stranded β-sheet packed against four helical regions. The structure is well defined by ca. 9 NOEs per residue and a backbone rmsd of 0.50±0.05 Å for the representative ensemble of 20 lowest-energy structures. The structure is overall rigid except for N-terminal residues A(9) to D(11) at the beginning of β1, K(38), V(39) at the end of helix H3 with rapid motion in the ps-ns timescale and G(25) (helix H2), I(68) (β2) and V(78) (loop 3) undergoing internal motion in the μs-ms timescale. Limited structural similarities were found in protein structures deposited in the PDB, therefore functional inferences based on protein structure information are not clear. Q4D059 adopts a α/β fold that is slightly similar to the ATPase sub-domain IIB of the heat-shock protein 70 (HSP70) and to the N-terminal domain of the ribosomal protein L11.


    Organizational Affiliation

    Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, RJ, Brazil.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HP_Q4D059
A
92Trypanosoma cruzi (strain CL Brener)N/A
Find proteins for Q4D059 (Trypanosoma cruzi (strain CL Brener))
Go to UniProtKB:  Q4D059
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2014-04-07 
  • Released Date: 2015-03-18 
  • Deposition Author(s): Lopez, A., Pires, J.

Revision History 

  • Version 1.0: 2015-03-18
    Type: Initial release
  • Version 1.1: 2015-03-25
    Type: Database references
  • Version 1.2: 2015-04-15
    Type: Database references