4YUS

Crystal structure of photoactivated adenylyl cyclase of a cyanobacteriaOscillatoria acuminata in hexagonal form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.212 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural insight into photoactivation of an adenylate cyclase from a photosynthetic cyanobacterium

Ohki, M.Sugiyama, K.Kawai, F.Tanaka, H.Nihei, Y.Unzai, S.Takebe, M.Matsunaga, S.Adachi, S.Shibayama, N.Zhou, Z.Koyama, R.Ikegaya, Y.Takahashi, T.Tame, J.R.H.Iseki, M.Park, S.-Y.

(2016) Proc.Natl.Acad.Sci.USA 113: 6659-6664

  • DOI: 10.1073/pnas.1517520113
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Cyclic-AMP is one of the most important second messengers, regulating many crucial cellular events in both prokaryotes and eukaryotes, and precise spatial and temporal control of cAMP levels by light shows great promise as a simple means of manipulat ...

    Cyclic-AMP is one of the most important second messengers, regulating many crucial cellular events in both prokaryotes and eukaryotes, and precise spatial and temporal control of cAMP levels by light shows great promise as a simple means of manipulating and studying numerous cell pathways and processes. The photoactivated adenylate cyclase (PAC) from the photosynthetic cyanobacterium Oscillatoria acuminata (OaPAC) is a small homodimer eminently suitable for this task, requiring only a simple flavin chromophore within a blue light using flavin (BLUF) domain. These domains, one of the most studied types of biological photoreceptor, respond to blue light and either regulate the activity of an attached enzyme domain or change its affinity for a repressor protein. BLUF domains were discovered through studies of photo-induced movements of Euglena gracilis, a unicellular flagellate, and gene expression in the purple bacterium Rhodobacter sphaeroides, but the precise details of light activation remain unknown. Here, we describe crystal structures and the light regulation mechanism of the previously undescribed OaPAC, showing a central coiled coil transmits changes from the light-sensing domains to the active sites with minimal structural rearrangement. Site-directed mutants show residues essential for signal transduction over 45 Å across the protein. The use of the protein in living human cells is demonstrated with cAMP-dependent luciferase, showing a rapid and stable response to light over many hours and activation cycles. The structures determined in this study will assist future efforts to create artificial light-regulated control modules as part of a general optogenetic toolkit.


    Organizational Affiliation

    Drug Design Laboratory, Graduate School of Medical Life Science, Yokohama City University, Tsurumi, Yokohama, 230-0045, Japan;




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Family 3 adenylate cyclase
A
382Oscillatoria acuminata PCC 6304Mutation(s): 0 
Find proteins for K9TLZ5 (Oscillatoria acuminata PCC 6304)
Go to UniProtKB:  K9TLZ5
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FMN
Query on FMN

Download SDF File 
Download CCD File 
A
FLAVIN MONONUCLEOTIDE
RIBOFLAVIN MONOPHOSPHATE
C17 H21 N4 O9 P
FVTCRASFADXXNN-SCRDCRAPSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.212 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 76.838α = 90.00
b = 76.838β = 90.00
c = 204.778γ = 120.00
Software Package:
Software NamePurpose
PHENIXrefinement
PHASERphasing
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-06-01
    Type: Initial release
  • Version 1.1: 2016-06-15
    Type: Database references
  • Version 1.2: 2016-06-29
    Type: Database references