6OAP

Crystal structure of a dual sensor histidine kinase in the green-light absorbing Pg state


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.97 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.184 

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This is version 1.2 of the entry. See complete history


Literature

Structural basis of molecular logic OR in a dual-sensor histidine kinase.

Shin, H.Ren, Z.Zeng, X.Bandara, S.Yang, X.

(2019) Proc Natl Acad Sci U S A 116: 19973-19982

  • DOI: 10.1073/pnas.1910855116
  • Primary Citation of Related Structures:  
    6OAQ, 6OAP, 6OB8

  • PubMed Abstract: 
  • Signal detection and integration by sensory proteins constitute the critical molecular events as living organisms respond to changes in a complex environment. Many sensory proteins adopt a modular architecture that integrates the perception of distinct chemical or physical signals and the generation of a biological response in the same protein molecule ...

    Signal detection and integration by sensory proteins constitute the critical molecular events as living organisms respond to changes in a complex environment. Many sensory proteins adopt a modular architecture that integrates the perception of distinct chemical or physical signals and the generation of a biological response in the same protein molecule. Currently, how signal perception and integration are achieved in such a modular, often dimeric, framework remains elusive. Here, we report a dynamic crystallography study on the tandem sensor domains of a dual-sensor histidine kinase PPHK (phosphorylation-responsive photosensitive histidine kinase) that operates a molecular logic OR, by which the output kinase activity is modulated by a phosphorylation signal and a light signal. A joint analysis of ∼170 crystallographic datasets probing different signaling states shows remarkable dimer asymmetry as PPHK responds to the input signals and transitions from one state to the other. Supported by mutational data and structural analysis, these direct observations reveal the working mechanics of the molecular logic OR in PPHK, where the light-induced bending of a long signaling helix at the dimer interface is counteracted by the ligand-induced structural changes from a different sensor domain. We propose that the logic OR of PPHK, together with an upstream photoreceptor, implements a "long-pass" red light response distinct from those accomplished by classical phytochromes.


    Organizational Affiliation

    Department of Ophthalmology and Vision Sciences, The University of Illinois at Chicago, Chicago, IL 60607.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Dual sensor histidine kinaseA, B316[Leptolyngbya] sp. JSC-1Mutation(s): 0 
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.97 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.184 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 72.532α = 90
b = 72.532β = 90
c = 254.734γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHENIXphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)United StatesR01EY024363
Other privateUnited StatesCBC C-086

Revision History  (Full details and data files)

  • Version 1.0: 2019-09-18
    Type: Initial release
  • Version 1.1: 2019-11-13
    Changes: Database references
  • Version 1.2: 2019-12-18
    Changes: Author supporting evidence