1M2F

Solution structure of the N-terminal domain of Synechococcus elongatus KaiA (KaiA135N); Family of 25 structures


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 25 
  • 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

Structure and Function from the Circadian Clock Protein KaiA of Synechococcus elongatus: A potential Clock Input Mechanism

Williams, S.B.Vakonakis, I.Golden, S.S.LiWang, A.C.

(2002) Proc Natl Acad Sci U S A 99: 15357-15362

  • DOI: 10.1073/pnas.232517099
  • Primary Citation of Related Structures:  
    1M2F, 1M2E

  • PubMed Abstract: 
  • In the cyanobacterium Synechococcus elongatus (PCC 7942) the proteins KaiA, KaiB, and KaiC are required for circadian clock function. We deduced a circadian clock function for KaiA from a combination of biochemical and structural data. Both KaiA and ...

    In the cyanobacterium Synechococcus elongatus (PCC 7942) the proteins KaiA, KaiB, and KaiC are required for circadian clock function. We deduced a circadian clock function for KaiA from a combination of biochemical and structural data. Both KaiA and its isolated carboxyl-terminal domain (KaiA180C) stimulated KaiC autophosphorylation and facilitated attenuation of KaiC autophosphorylation by KaiB. An amino-terminal domain (KaiA135N) had no function in the autophosphorylation assay. NMR structure determination showed that KaiA135N is a pseudo-receiver domain. We propose that this pseudo-receiver is a timing input-device that regulates KaiA stimulation of KaiC autophosphorylation, which in turn is essential for circadian timekeeping.


    Organizational Affiliation

    Department of Biology, Texas A&M University, College Station 77843, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
KaiAA135Synechococcus elongatusMutation(s): 0 
Gene Names: kaiA
Find proteins for Q79PF6 (Synechococcus elongatus (strain PCC 7942 / FACHB-805))
Explore Q79PF6 
Go to UniProtKB:  Q79PF6
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 25 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 1M2F Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-11-13
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance