4GYC

Structure of the SRII(D75N mutant)/HtrII Complex in I212121 space group ("U" shape)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.204 

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Literature

Ground state structure of D75N mutant of sensory rhodopsin II in complex with its cognate transducer.

Ishchenko, A., Round, E., Borshchevskiy, V., Grudinin, S., Gushchin, I., Klare, J.P., Balandin, T., Remeeva, A., Engelhard, M., Buldt, G., Gordeliy, V.

(2013) J Photochem Photobiol B 123C: 55-58

  • DOI: 10.1016/j.jphotobiol.2013.03.008
  • Primary Citation of Related Structures:  
    4GYC

  • PubMed Abstract: 

    • The complex of sensory rhodopsin II (NpSRII) with its cognate transducer (NpHtrII) mediates negative phototaxis in halobacteria Natronomonas pharaonis. Upon light activation NpSRII triggers, by means of NpHtrII, a signal transduction chain homologous to the two component system in eubacterial chemotaxis ...

    The complex of sensory rhodopsin II (NpSRII) with its cognate transducer (NpHtrII) mediates negative phototaxis in halobacteria Natronomonas pharaonis. Upon light activation NpSRII triggers, by means of NpHtrII, a signal transduction chain homologous to the two component system in eubacterial chemotaxis. Here we report on the crystal structure of the ground state of the mutant NpSRII-D75N/NpHtrII complex in the space group I212121. Mutations of this aspartic acid in light-driven proton pumps dramatically modify or/and inhibit protein functions. However, in vivo studies show that the similar D75N mutation retains functionality of the NpSRII/NpHtrII complex. The structure provides the molecular basis for the explanation of the unexpected observation that the wild and the mutant complexes display identical physiological response on light excitation.

    Organizational Affiliation: 

    Institute of Complex Systems (ICS), ICS-5: Molecular Biophysics, Research Centre Juelich, 52425 Juelich, Germany.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Sensory rhodopsin-2A245Natronomonas pharaonisMutation(s): 1 
Gene Names: sop2, sopII
Membrane Entity: Yes 
UniProt
Find proteins for P42196 (Natronomonas pharaonis)
Explore P42196 
Go to UniProtKB:  P42196
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP42196
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Sensory rhodopsin II transducerB135Natronomonas pharaonisMutation(s): 0 
Gene Names: htr2, htrII
Membrane Entity: Yes 
UniProt
Find proteins for P42259 (Natronomonas pharaonis)
Explore P42259 
Go to UniProtKB:  P42259
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP42259
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.204 
  • Space Group: I 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.465α = 90
b = 113.674β = 90
c = 126.185γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
MOLREPphasing
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-05-08
    Type: Initial release
  • Version 1.1: 2017-03-08
    Changes: Structure summary