2DYD

Solution structure of the PABC domain from Triticum aevestium poly(A)-binding protein


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the least restraint violations 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Solution structure of the PABC domain from wheat poly (A)-binding protein: an insight into RNA metabolic and translational control in plants

Siddiqui, N.Osborne, M.J.Gallie, D.R.Gehring, K.

(2007) Biochemistry 46: 4221-4231

  • DOI: https://doi.org/10.1021/bi061986d
  • Primary Citation of Related Structures:  
    2DYD

  • PubMed Abstract: 

    In animals, the PABC domain from poly (A)-binding protein recruits proteins containing a specific interacting motif (PAM-2) to the mRNP complex. These proteins include Paip1, Paip2, and eukaryotic release factor 3 (eRF3), all of which regulate PABP function in translation. The following reports the solution structure of PABC from Triticum avestium (wheat) poly (A)-binding protein determined by NMR spectroscopy. Wheat PABC (wPABC) is an alpha-helical protein domain, which displays a fold highly similar to the human PABC domain and contains a PAM-2 peptide binding site. Through a bioinformatics search, several plant proteins containing a PAM-2 site were identified including the early response to dehydration protein (ERD-15), which was previously shown to regulate PABP-dependent translation. The plant PAM-2 proteins contain a variety of conserved sequences including a PABP-interacting 1 motif (PAM-1), RNA binding domains, an SMR endonuclease domain, and a poly (A)-nuclease regulatory domain, all of which suggest a function in either translation or mRNA metabolism. The proteins identified are well conserved throughout plant species but have no sequence homologues in metazoans. We show that wPABC binds to the plant PAM-2 motif with high affinity through a conserved mechanism. Overall, our results suggest that plant species have evolved a distinct regulatory mechanism involving novel PABP binding partners.


  • Organizational Affiliation

    Department of Biochemistry, McGill University, 3655 Promenade Sir William Osler, QC H3G-1Y6, Canada.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Poly(A)-binding protein85Triticum aestivumMutation(s): 0 
Gene Names: PABP
UniProt
Find proteins for P93616 (Triticum aestivum)
Explore P93616 
Go to UniProtKB:  P93616
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP93616
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the least restraint violations 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Released Date: 2007-05-22 
  • Deposition Author(s): Siddiqui, N.

Revision History  (Full details and data files)

  • Version 1.0: 2007-05-22
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-03-09
    Changes: Database references, Derived calculations
  • Version 1.4: 2024-05-29
    Changes: Data collection