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
  • Primary Citation of Related Structures:  
    2MQH

  • 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 (NAB1) is a negative regulator of LHC protein translation ...

    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 m.landsberg@uq.edu.au m.mobli@uq.edu.au b.hankamer@imb.uq.edu.au.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Nucleic acid binding protein A82Chlamydomonas reinhardtiiMutation(s): 0 
Gene Names: CHLREDRAFT_126810NAB1NAB1 nucleic acid binding proteinNab1CHLRE_06g268600v5
Find proteins for Q8GV23 (Chlamydomonas reinhardtii)
Explore Q8GV23 
Go to UniProtKB:  Q8GV23
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 2MQH Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2014-06-20 
  • Released Date: 2015-05-06 
  • Deposition Author(s): Sawyer, A., Mobli, M.

Revision History  (Full details and data files)

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