8UQK

Pfr state of photosensory core module of Stigmatella aurantiaca bacteriophytochrome 2


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.61 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Photoreception and signaling in bacterial phytochrome revealed by single-particle cryo-EM.

Malla, T.N.Hernandez, C.Muniyappan, S.Menendez, D.Bizhga, D.Mendez, J.H.Schwander, P.Stojkovic, E.A.Schmidt, M.

(2024) Sci Adv 10: eadq0653-eadq0653

  • DOI: https://doi.org/10.1126/sciadv.adq0653
  • Primary Citation of Related Structures:  
    8UPH, 8UPK, 8UPM, 8UQI, 8UQK

  • PubMed Abstract: 

    Phytochromes are red-light photoreceptors discovered in plants with homologs in bacteria and fungi that regulate a variety of physiological responses. They display a reversible photocycle between two distinct states: a red-light-absorbing Pr state and a far-red light-absorbing Pfr state. The photoconversion regulates the activity of an enzymatic domain, usually a histidine kinase (HK). The molecular mechanism that explains how light controls the HK activity is not understood because structures of unmodified bacterial phytochromes with HK activity are missing. Here, we report three cryo-electron microscopy structures of a wild-type bacterial phytochrome with HK activity determined as Pr and Pfr homodimers and as a Pr/Pfr heterodimer with individual subunits in distinct states. We propose that the Pr/Pfr heterodimer is a physiologically relevant signal transduction intermediate. Our results offer insight into the molecular mechanism that controls the enzymatic activity of the HK as part of a bacterial two-component system that perceives and transduces light signals.


  • Organizational Affiliation

    Department of Physics, University of Wisconsin-Milwaukee, Milwaukee, WI 53211, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Bacteriophytochrome (Light-regulated signal transduction histidine kinase)A [auth B],
B [auth A]
747Stigmatella aurantiacaMutation(s): 0 
Gene Names: SAMN05444354_11920
UniProt
Find proteins for A0A1H7ZJA8 (Stigmatella aurantiaca)
Explore A0A1H7ZJA8 
Go to UniProtKB:  A0A1H7ZJA8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A1H7ZJA8
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.61 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIX1.19.2_4158:

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Science Foundation (NSF, United States)United StatesNSF-STC-1231306
National Science Foundation (NSF, United States)United StatesNSF STC BioXFEL center award 6227

Revision History  (Full details and data files)

  • Version 1.0: 2024-09-25
    Type: Initial release