2J48

NMR structure of the pseudo-receiver domain of the CikA protein.


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: ENERGY 

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This is version 1.3 of the entry. See complete history


Literature

NMR structure of the pseudo-receiver domain of CikA.

Gao, T.Zhang, X.Ivleva, N.B.Golden, S.S.LiWang, A.

(2007) Protein Sci 16: 465-475

  • DOI: 10.1110/ps.062532007
  • Primary Citation of Related Structures:  
    2J48

  • PubMed Abstract: 
  • The circadian input kinase (CikA) is a major element of the pathway that provides environmental information to the circadian clock of the cyanobacterium Synechococcus elongatus. CikA is a polypeptide of 754 residues and has three recognizable domains: GAF, histidine protein kinase, and receiver-like ...

    The circadian input kinase (CikA) is a major element of the pathway that provides environmental information to the circadian clock of the cyanobacterium Synechococcus elongatus. CikA is a polypeptide of 754 residues and has three recognizable domains: GAF, histidine protein kinase, and receiver-like. This latter domain of CikA lacks the conserved phospho-accepting aspartyl residue of bona fide receiver domains and is thus a pseudo-receiver (PsR). Recently, it was shown that the PsR domain (1) attenuates the autokinase activity of CikA, (2) is necessary to localize CikA to the cell pole, and (3) is necessary for the destabilization of CikA in the presence of the quinone analog 2,5-dibromo-3-methyl-6-isopropyl-p-benzoquinone (DBMIB). The solution structure of the PsR domain of CikA, CikAPsR, is presented here. A model of the interaction between the PsR domain and HPK portion of CikA provides a potential explanation for how the PsR domain attenuates the autokinase activity of CikA. Finally, a likely quinone-binding surface on CikAPsR is shown here.


    Organizational Affiliation

    Center for Research on Biological Clocks, Texas A&M University College Station, Texas 77843, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TWO-COMPONENT SENSOR KINASEA119Synechococcus elongatus PCC 7942 = FACHB-805Mutation(s): 0 
Gene Names: cikASynpcc7942_0644
EC: 2.7.13.3 (PDB Primary Data), 2.7.3 (UniProt)
UniProt
Find proteins for Q9KHI5 (Synechococcus elongatus (strain PCC 7942 / FACHB-805))
Explore Q9KHI5 
Go to UniProtKB:  Q9KHI5
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: ENERGY 
  • OLDERADO: 2J48 Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-03-06
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-03-28
    Changes: Database references, Source and taxonomy