Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Dihedral - D5  (3D View)
Global Stoichiometry: Homo 10-mer - A10 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 180.80 kDa 
• Atom Count: 11653 
• Modelled Residue Count: 1412 
• Deposited Residue Count: 1530 
• Unique protein chains: 1

2HFN

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

• PDB DOI: 10.2210/pdb2HFN/pdb

• Classification: ELECTRON TRANSPORT
• Organism(s): Synechocystis sp.
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2006-06-24 Released: 2006-12-19 
• Deposition Author(s): Yuan, H., Anderson, S., Masuda, S., Dragnea, V., Moffat, K., Bauer, C.E.

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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 

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

• PubMed: 17042486 
• 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. 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Synechocystis Photoreceptor (Slr1694)	A, B, C, D, E, F, G, H, I, J	153	Synechocystis sp.	Mutation(s): 0
UniProt
Find proteins for P74295 (Synechocystis sp. (strain PCC 6803 / Kazusa)) Explore P74295  Go to UniProtKB:  P74295

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FMN	K [auth A], L [auth B], M [auth C], N [auth D], O [auth E], P [auth F], Q [auth G], R [auth H], S [auth I], T [auth J]	FLAVIN MONONUCLEOTIDE C17 H21 N4 O9 P FVTCRASFADXXNN-SCRDCRAPSA-N

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 = 90.927	α = 90
b = 118.109	β = 110.79
c = 97.1	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling
SOLVE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-06-24 
• Released Date: 2006-12-19 
Deposition Author(s): Yuan, H., Anderson, S., Masuda, S., Dragnea, V., Moffat, K., Bauer, C.E.

Revision History  

• 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