6T73

New antiparallel dimer of aureochrome 1a LOV domain mutants from Phaeodactylum tricornutum


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.44 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.249 
  • R-Value Observed: 0.251 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

An Optogenetic Tool for Induced Protein Stabilization Based on the Phaeodactylum tricornutum Aureochrome 1a Light-Oxygen-Voltage Domain.

Hepp, S.Trauth, J.Hasenjager, S.Bezold, F.Essen, L.O.Taxis, C.

(2020) J Mol Biol 432: 1880-1900

  • DOI: https://doi.org/10.1016/j.jmb.2020.02.019
  • Primary Citation of Related Structures:  
    6T73, 6T74

  • PubMed Abstract: 

    Control of cellular events by optogenetic tools is a powerful approach to manipulate cellular functions in a minimally invasive manner. A common problem posed by the application of optogenetic tools is to tune the activity range to be physiologically relevant. Here, we characterized a photoreceptor of the light-oxygen-voltage (LOV) domain family of Phaeodactylum tricornutum aureochrome 1a (AuLOV) as a tool for increasing protein stability under blue light conditions in budding yeast. Structural studies of AuLOV wt , the variants AuLOV M254 , and AuLOV W349 revealed alternative dimer association modes for the dark state, which differ from previously reported AuLOV dark-state structures. Rational design of AuLOV-dimer interface mutations resulted in an optimized optogenetic tool that we fused to the photoactivatable adenylyl cyclase from Beggiatoa sp. This synergistic light-regulation approach using two photoreceptors resulted in an optimized, photoactivatable adenylyl cyclase with a cyclic adenosine monophosphate production activity that matches the physiological range of Saccharomyces cerevisiae. Overall, we enlarged the optogenetic toolbox for yeast and demonstrated the importance of fine-tuning the optogenetic tool activity for successful application in cells.


  • Organizational Affiliation

    Unit for Structural Biochemistry, Department of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032 Marburg, Germany; Center of Synthetic Microbiology, Philipps Universität Marburg, Hans-Meerwein- Strasse 4, 35032 Marburg, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Ptaureo1a lov2 domain
A, B, C
162Phaeodactylum tricornutumMutation(s): 0 
UniProt
Find proteins for A0A140UHJ0 (Phaeodactylum tricornutum)
Explore A0A140UHJ0 
Go to UniProtKB:  A0A140UHJ0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A140UHJ0
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.44 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.249 
  • R-Value Observed: 0.251 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 168.374α = 90
b = 168.374β = 90
c = 95.711γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
PHENIXphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
German Research FoundationGermanyES152/16-1; TA320/7-1

Revision History  (Full details and data files)

  • Version 1.0: 2020-03-18
    Type: Initial release
  • Version 1.1: 2020-04-08
    Changes: Database references
  • Version 1.2: 2020-05-20
    Changes: Database references
  • Version 1.3: 2024-01-24
    Changes: Data collection, Database references, Refinement description