1X0P

Structure of a cyanobacterial BLUF protein, Tll0078


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.231 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure of a Cyanobacterial BLUF Protein, Tll0078, Containing a Novel FAD-binding Blue Light Sensor Domain

Kita, A.Okajima, K.Morimoto, Y.Ikeuchi, M.Miki, K.

(2005) J.Mol.Biol. 349: 1-9

  • DOI: 10.1016/j.jmb.2005.03.067

  • PubMed Abstract: 
  • The sensor proteins for blue light using the FAD (BLUF) domain belong to the third family of the photoreceptor proteins using a flavin chromophore, where the other two families are phototropins and cryptochromes. As the first structure of this BLUF d ...

    The sensor proteins for blue light using the FAD (BLUF) domain belong to the third family of the photoreceptor proteins using a flavin chromophore, where the other two families are phototropins and cryptochromes. As the first structure of this BLUF domain, we have determined the crystal structure of the Tll0078 protein from Thermosynechococcus elongatus BP-1, which contains a BLUF domain bound to FAD, at 2A resolution. Five Tll0078 monomers are located around the non-crystallographic 5-fold axis to form a pentamer, and two pentamers related by 2-fold non-crystallographic symmetry form a decameric assembly. The monomer consists of two domains, the BLUF domain at the N-terminal region and the C-terminal domain. The overall structure of the BLUF domain consists of a five-stranded mixed beta-sheet with two alpha-helices running parallel with it. The isoalloxazine ring of FAD is accommodated in a pocket formed by several highly conserved amino acid residues in the BLUF domain. Of these, the three apparent key residues (Asn31, Asn32 and Gln50) were substituted with Ala. Mutant proteins of N31A and N32A showed a nearly normal 10nm spectral shift of the flavin upon illumination, while the Q50A mutant did not exhibit such a shift at all. On the basis of the crystal structure, we discussed a possible role of Gln50, which is structurally and functionally linked with the critical Tyr8 (FAD-Gln50-Tyr8 network), with regard to the light-induced spectral shift of the BLUF proteins.


    Organizational Affiliation

    Research Reactor Institute, Kyoto University, Kumatori, Osaka 590-0494, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
hypothetical protein Tll0078
A, B, C, D, E, F, G, H, I, J
143Thermosynechococcus elongatus (strain BP-1)Mutation(s): 0 
Find proteins for Q8DMN3 (Thermosynechococcus elongatus (strain BP-1))
Go to UniProtKB:  Q8DMN3
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FAD
Query on FAD

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H, I, J
FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.231 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 89.511α = 90.00
b = 109.850β = 90.00
c = 169.875γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
HKL-2000data reduction
HKL-2000data collection
SOLVEphasing
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-06-07
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Source and taxonomy, Version format compliance
  • Version 1.3: 2018-01-24
    Type: Experimental preparation