1N9L

Crystal structure of the Phot-LOV1 domain from Chlamydomonas reinhardtii in the dark state.

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.233 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history. 


Literature

Crystal structures and molecular mechanism of a light-induced signaling switch: The Phot-LOV1 domain from Chlamydomonas reinhardtii.

Fedorov, R., Schlichting, I., Hartmann, E., Domratcheva, T., Fuhrmann, M., Hegemann, P.

(2003) Biophys J 84: 2474-2482

  • DOI: 10.1016/S0006-3495(03)75052-8
  • Primary Citation of Related Structures:  
    1N9O, 1N9N, 1N9L

  • PubMed Abstract: 

    • Phot proteins (phototropins and homologs) are blue-light photoreceptors that control mechanical processes like phototropism, chloroplast relocation, or guard-cell opening in plants. Phot receptors consist of two flavin mononucleotide (FMN)-binding light, oxygen, or voltage (LOV) domains and a C-terminal serine/threonine kinase domain ...

    Phot proteins (phototropins and homologs) are blue-light photoreceptors that control mechanical processes like phototropism, chloroplast relocation, or guard-cell opening in plants. Phot receptors consist of two flavin mononucleotide (FMN)-binding light, oxygen, or voltage (LOV) domains and a C-terminal serine/threonine kinase domain. We determined crystal structures of the LOV1 domain of Phot1 from the green alga Chlamydomonas reinhardtii in the dark and illuminated state to 1.9 A and 2.8 A resolution, respectively. The structure resembles that of LOV2 from Adiantum (Crosson, S. and K. Moffat. 2001. PROC: Natl. Acad. Sci. USA. 98:2995-3000). In the resting dark state of LOV1, the reactive Cys-57 is present in two conformations. Blue-light absorption causes formation of a proposed active signaling state that is characterized by a covalent bond between the flavin C4a and the thiol of Cys-57. There are differences around the FMN chromophore but no large overall conformational changes. Quantum chemical calculations based on the crystal structures revealed the electronic distribution in the active site during the photocycle. The results suggest trajectories for electrons, protons, and the active site cysteine and offer an interpretation of the reaction mechanism.

    Organizational Affiliation: 

    Max Planck Institut für Molekulare Physiologie, Abteilung Biophysikalische Chemie, 44227 Dortmund, Germany.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
putative blue light receptorA109Chlamydomonas reinhardtiiMutation(s): 0 
Gene Names: PHOT, CHLRE_03g199000v5, CHLREDRAFT_183965
EC: 2.7.11.1
Find proteins for Q8LPD9 (Chlamydomonas reinhardtii)
Explore Q8LPD9 
Go to UniProtKB:  Q8LPD9
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FMN
Query on FMN
Download CCD File 
A
FLAVIN MONONUCLEOTIDE
C17 H21 N4 O9 P
FVTCRASFADXXNN-SCRDCRAPSA-N		 Ligand Interaction
SO4
Query on SO4
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.233 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 122.1α = 90
b = 122.1β = 90
c = 46.1γ = 120
Software Package:
Software NamePurpose
ProDCdata collection
XDSdata reduction
AMoREphasing
CNSrefinement
XDSdata scaling

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-06-17
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description
  • Version 1.4: 2019-11-06
    Changes: Data collection, Database references