Structure of a natural red emitting luciferase from Phrixothrix hirtus (P3121 crystal form)

Experimental Data Snapshot

  • Resolution: 3.60 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.209 

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Beetle luciferases with naturally red- and blue-shifted emission.

Carrasco-Lopez, C.Ferreira, J.C.Lui, N.M.Schramm, S.Berraud-Pache, R.Navizet, I.Panjikar, S.Naumov, P.Rabeh, W.M.

(2018) Life Sci Alliance 1: e201800072-e201800072

  • DOI: https://doi.org/10.26508/lsa.201800072
  • Primary Citation of Related Structures:  
    6AAA, 6ABH, 6AC3

  • PubMed Abstract: 

    The different colors of light emitted by bioluminescent beetles that use an identical substrate and chemiexcitation reaction sequence to generate light remain a challenging and controversial mechanistic conundrum. The crystal structures of two beetle luciferases with red- and blue-shifted light relative to the green yellow light of the common firefly species provide direct insight into the molecular origin of the bioluminescence color. The structure of a blue-shifted green-emitting luciferase from the firefly Amydetes vivianii is monomeric with a structural fold similar to the previously reported firefly luciferases. The only known naturally red-emitting luciferase from the glow-worm Phrixothrix hirtus exists as tetramers and octamers. Structural and computational analyses reveal varying aperture between the two domains enclosing the active site. Mutagenesis analysis identified two conserved loops that contribute to the color of the emitted light. These results are expected to advance comparative computational studies into the conformational landscape of the luciferase reaction sequence.

  • Organizational Affiliation

    Laboratoire Modélisation et Simulation Multi Echelle, MSME UMR 8208 CNRS, Université Paris-Est, Marne-la-Vallée, France.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Red-bioluminescence eliciting luciferase
A, B, C, D
546Phrixothrix hirtusMutation(s): 0 
Find proteins for Q9U4U7 (Phrixothrix hirtus)
Explore Q9U4U7 
Go to UniProtKB:  Q9U4U7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9U4U7
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.60 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.209 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 119.1α = 90
b = 119.1β = 90
c = 351.402γ = 120
Software Package:
Software NamePurpose
iMOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
United Arab Emirates--

Revision History  (Full details and data files)

  • Version 1.0: 2018-08-22
    Type: Initial release
  • Version 1.1: 2018-12-05
    Changes: Data collection, Database references
  • Version 1.2: 2023-11-22
    Changes: Data collection, Database references, Refinement description