1NMR

Solution Structure of C-terminal Domain from Trypanosoma cruzi Poly(A)-Binding Protein


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the least restraint violations,structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Solution Structure of the C-terminal Domain from poly(A)-binding protein in Trypanosoma cruzi: A vegetal PABC domain

Siddiqui, N.Kozlov, G.D'Orso, I.Trempe, J.F.Gehring, K.

(2003) Protein Sci 12: 1925-1933

  • DOI: https://doi.org/10.1110/ps.0390103
  • Primary Citation of Related Structures:  
    1NMR

  • PubMed Abstract: 

    PABC is a phylogenetically conserved peptide-binding domain primarily found within the C terminus of poly(A)-binding proteins (PABPs). This domain recruits a series of translation factors including poly(A)-interacting proteins (Paip1 and Paip2) and release factor 3 (RF3/GSPT) to the initiation complex on mRNA. Here, we determine the solution structure of the Trypanosoma cruzi PABC domain (TcPABC), a representative of the vegetal class of PABP proteins. TcPABC is similar to human PABC (hPABC) and consists of five alpha-helices, in contrast to the four helices observed in PABC domains from yeast (yPABC) and hyper plastic disk proteins (hHYD). A mobile N-terminal helix is observed in TcPABC that does not pack against the core of the protein, as found in hPABC. Characteristic to all PABC domains, the last four helices of TcPABC fold into a right-handed super coil. TcPABC demonstrates high-affinity binding to PABP interacting motif-2 (PAM-2) and reveals a peptide-binding surface homologous to that of hPABC. Our results demonstrate the last four helices in TcPABC are sufficient for peptide recognition and we predict a similar binding mode in PABC domains. Furthermore, these results point to the presence of putative PAM-2 site-containing proteins in trypanosomes.


  • Organizational Affiliation

    Department of Biochemistry, McGill University, Montreal, Quebec H3G 1Y6, Canada.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
poly(A)-binding protein85Trypanosoma cruziMutation(s): 0 
UniProt
Find proteins for Q27335 (Trypanosoma cruzi)
Explore Q27335 
Go to UniProtKB:  Q27335
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ27335
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the least restraint violations,structures with the lowest energy 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-09-09
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-02-23
    Changes: Data collection, Database references, Derived calculations
  • Version 1.4: 2024-05-22
    Changes: Data collection