2MQH

Solution structure of the Chlamydomonas reinhardtii NAB1 cold shock domain, CSD1


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

Solution structure of the RNA-binding cold-shock domain of the Chlamydomonas reinhardtii NAB1 protein and insights into RNA recognition.

Sawyer, A.L.Landsberg, M.J.Ross, I.L.Kruse, O.Mobli, M.Hankamer, B.

(2015) Biochem.J. 469: 97-106

  • DOI: 10.1042/BJ20150217

  • PubMed Abstract: 
  • Light-harvesting complex (LHC) proteins are among the most abundant proteins on Earth and play critical roles in photosynthesis, both in light capture and in photoprotective mechanisms. The Chlamydomonas reinhardtii nucleic acid-binding protein 1 (NA ...

    Light-harvesting complex (LHC) proteins are among the most abundant proteins on Earth and play critical roles in photosynthesis, both in light capture and in photoprotective mechanisms. The Chlamydomonas reinhardtii nucleic acid-binding protein 1 (NAB1) is a negative regulator of LHC protein translation. Its N-terminal cold-shock domain (CSD) binds to a 13-nt element [CSD consensus sequence (CSDCS)] found in the mRNA of specific LHC proteins associated with Photosystem II (PSII), an interaction which regulates LHC expression and, consequently, PSII-associated antenna size, structure and function. In the present study, we elucidated the solution structure of the NAB1 CSD as determined by heteronuclear NMR. The CSD adopts a characteristic five-stranded anti parallel β-barrel fold. Upon addition of CSDCS RNA, a large number of NMR chemical shift perturbations were observed, corresponding primarily to surface-exposed residues within the highly conserved β2- and β3-strands in the canonical RNA-binding region, but also to residues on β-strand 5 extending the positive surface patch and the overall RNA-binding site. Additional chemical shift perturbations that accompanied RNA binding involved buried residues, suggesting that transcript recognition is accompanied by conformational change. Our results indicate that NAB1 associates with RNA transcripts through a mechanism involving its CSD that is conserved with mechanisms of sequence-specific nucleic acid recognition employed by ancestrally related bacterial cold-shock proteins (CSPs).


    Related Citations: 
    • NAB1 is an RNA binding protein involved in the light-regulated differential expression of the light-harvesting antenna of Chlamydomonas reinhardtii
      Mussgnug, J.,Wobbe, L.,Elles, I.,Claus, C.,Hamilton, M.,Fink, A.,Kahmann, U.,Kapazoglou, A.,Mullineaux, C.,Hippler, M.,Nickelsen, J.,Nixon, P.,Kruse, O.
      (2005) Plant Cell 17: 3409


    Organizational Affiliation

    Institute for Molecular Bioscience, The University of Queensland, St Lucia, Queensland 4072, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Nucleic acid binding protein
A
82Chlamydomonas reinhardtiiGene Names: Nab1 (NAB1)
Find proteins for Q8GV23 (Chlamydomonas reinhardtii)
Go to UniProtKB:  Q8GV23
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: 2014-06-20 
  • Released Date: 2015-05-06 
  • Deposition Author(s): Sawyer, A., Mobli, M.

Revision History 

  • Version 1.0: 2015-05-06
    Type: Initial release
  • Version 1.1: 2015-09-30
    Type: Database references
  • Version 1.2: 2017-12-20
    Type: Database references