2HFN

Crystal Structures of the Synechocystis Photoreceptor Slr1694 Reveal Distinct Structural States Related to Signaling


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.240 
  • R-Value Observed: 0.241 

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This is version 1.2 of the entry. See complete history


Literature

Crystal structures of the Synechocystis photoreceptor Slr1694 reveal distinct structural states related to signaling.

Yuan, H.Anderson, S.Masuda, S.Dragnea, V.Moffat, K.Bauer, C.E.

(2006) Biochemistry 45: 12687-12694

  • DOI: 10.1021/bi061435n
  • Primary Citation of Related Structures:  
    2HFN, 2HFO

  • PubMed Abstract: 
  • Crystal structures of the Synechocystis BLUF phototaxis photoreceptor Slr1694 have been determined in two crystal forms, a monoclinic form at 1.8 A resolution and an orthorhombic form at 2.1 A resolution. In both forms, the photoreceptor is comprised of two pentamer rings stacked face to face ...

    Crystal structures of the Synechocystis BLUF phototaxis photoreceptor Slr1694 have been determined in two crystal forms, a monoclinic form at 1.8 A resolution and an orthorhombic form at 2.1 A resolution. In both forms, the photoreceptor is comprised of two pentamer rings stacked face to face. Twenty total subunits in the two asymmetric units of these crystal forms display three distinct tertiary structures that differ in the length of the fifth beta-strand and in the orientation of Trp91, a conserved Trp residue near the FMN chromophore. Fluorescence spectroscopic analysis on Slr1694 in solution is consistent with motion of Trp91 from a hydrophobic environment in the dark state to a more hydrophilic environment in the light-excited state. Mutational analysis indicates that movement of Trp91 is dependent on the occupancy of the hydrophobic Trp binding pocket with a nearby Met. These different tertiary structures may be associated with absorption changes in the blue region of the spectrum.


    Organizational Affiliation

    Department of Biology, Indiana University, Bloomington, Indiana 47405, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Synechocystis Photoreceptor (Slr1694)
A, B, C, D, E, F, G, H, I, J
A, B, C, D, E, F, G, H, I, J
153Synechocystis sp.Mutation(s): 0 
UniProt
Find proteins for P74295 (Synechocystis sp. (strain PCC 6803 / Kazusa))
Explore P74295 
Go to UniProtKB:  P74295
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP74295
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.240 
  • R-Value Observed: 0.241 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 90.927α = 90
b = 118.109β = 110.79
c = 97.1γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
SOLVEphasing

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-12-19
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance