1I3C

RESPONSE REGULATOR FOR CYANOBACTERIAL PHYTOCHROME, RCP1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.190 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of a cyanobacterial phytochrome response regulator.

Im, Y.J.Rho, S.H.Park, C.M.Yang, S.S.Kang, J.G.Lee, J.Y.Song, P.S.Eom, S.H.

(2002) Protein Sci 11: 614-624

  • DOI: https://doi.org/10.1110/ps.39102
  • Primary Citation of Related Structures:  
    1I3C, 1JLK

  • PubMed Abstract: 

    The two-component signal transduction pathway widespread in prokaryotes, fungi, molds, and some plants involves an elaborate phosphorelay cascade. Rcp1 is the phosphate receiver module in a two-component system controlling the light response of cyanobacteria Synechocystis sp. via cyanobacterial phytochrome Cph1, which recognizes Rcp1 and transfers its phosphoryl group to an aspartate residue in response to light. Here we describe the crystal structure of Rcp1 refined to a crystallographic R-factor of 18.8% at a resolution of 1.9 A. The structure reveals a tightly associated homodimer with monomers comprised of doubly wound five-stranded parallel beta-sheets forming a single-domain protein homologous with the N-terminal activator domain of other response regulators (e.g., chemotaxis protein CheY). The three-dimensional structure of Rcp1 appears consistent with the conserved activation mechanism of phosphate receiver proteins, although in this case, the C-terminal half of its regulatory domain, which undergoes structural changes upon phosphorylation, contributes to the dimerization interface. The involvement of the residues undergoing phosphorylation-induced conformational changes at the dimeric interface suggests that dimerization of Rcp1 may be regulated by phosphorylation, which could affect the interaction of Rcp1 with downstream target molecules.


  • Organizational Affiliation

    Department of Life Science, Kwangju Institute of Science and Technology, Kwangju 500-712, Korea.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
RESPONSE REGULATOR RCP1
A, B
149Synechocystis sp. PCC 6803Mutation(s): 3 
Gene Names: SLR0474
UniProt
Find proteins for Q55169 (Synechocystis sp. (strain ATCC 27184 / PCC 6803 / Kazusa))
Explore Q55169 
Go to UniProtKB:  Q55169
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ55169
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.190 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 41.41α = 90
b = 76.99β = 106.15
c = 43.04γ = 90
Software Package:
Software NamePurpose
SHARPphasing
CNSrefinement
MOSFLMdata reduction
CCP4data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-03-06
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Source and taxonomy, Version format compliance