2BUN

Solution structure of the BLUF domain of AppA 5-125


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: LEAST RESTRAINT VIOLATION 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

The solution structure of the AppA BLUF domain: insight into the mechanism of light-induced signaling.

Grinstead, J.S.Hsu, S.T.Laan, W.Bonvin, A.M.Hellingwerf, K.J.Boelens, R.Kaptein, R.

(2006) Chembiochem 7: 187-193

  • DOI: 10.1002/cbic.200500270
  • Primary Citation of Related Structures:  
    2BUN

  • PubMed Abstract: 
  • The transcriptional antirepressor AppA from the photosynthetic bacterium Rhodobacter sphaeroides senses both the light climate and the intracellular redox state. Under aerobic conditions in the dark, AppA binds to and thereby blocks the function of PpsR, a transcriptional repressor ...

    The transcriptional antirepressor AppA from the photosynthetic bacterium Rhodobacter sphaeroides senses both the light climate and the intracellular redox state. Under aerobic conditions in the dark, AppA binds to and thereby blocks the function of PpsR, a transcriptional repressor. Absorption of a blue photon dissociates AppA from PpsR and allows the latter to repress photosynthesis gene expression. The N terminus of AppA contains sequence homology to flavin-containing photoreceptors that belong to the BLUF family. Structural and chemical aspects of signal transduction mediated by AppA are still largely unknown. Here we present NMR studies of the N-terminal flavin-binding BLUF domain of AppA. Its solution structure adopts an alpha/beta-sandwich fold with a beta alpha beta beta alpha beta beta topology, which represents a new flavin-binding fold. Considerable disorder is observed for residues near the chromophore due to conformational exchange. This disorder is observed both in the dark and in the light-induced signaling state of AppA. Furthermore, we detect light-induced structural changes in a patch of surface residues that provide a structural link between light absorption and signal-transduction events.


    Organizational Affiliation

    Department of NMR Spectroscopy, Bijvoet Center for Biomolecular Research, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
APPAA121Cereibacter sphaeroides 2.4.1Mutation(s): 0 
UniProt
Find proteins for Q53119 (Cereibacter sphaeroides)
Explore Q53119 
Go to UniProtKB:  Q53119
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FAD (Subject of Investigation/LOI)
Query on FAD

Download Ideal Coordinates CCD File 
B [auth A]FLAVIN-ADENINE DINUCLEOTIDE
C27 H33 N9 O15 P2
VWWQXMAJTJZDQX-UYBVJOGSSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: LEAST RESTRAINT VIOLATION 
  • OLDERADO: 2BUN Olderado

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-12-07
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-05-02
    Changes: Data collection, Database references, Source and taxonomy