5JJJ

Structure of the SRII/HtrII Complex in P64 space group ("U" shape)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.179 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

New Insights on Signal Propagation by Sensory Rhodopsin II/Transducer Complex.

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

(2017) Sci Rep 7: 41811-41811

  • DOI: 10.1038/srep41811
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The complex of two membrane proteins, sensory rhodopsin II (NpSRII) with its cognate transducer (NpHtrII), mediates negative phototaxis in halobacteria N. pharaonis. Upon light activation NpSRII triggers a signal transduction chain homologous to the ...

    The complex of two membrane proteins, sensory rhodopsin II (NpSRII) with its cognate transducer (NpHtrII), mediates negative phototaxis in halobacteria N. pharaonis. Upon light activation NpSRII triggers a signal transduction chain homologous to the two-component system in eubacterial chemotaxis. Here we report on crystal structures of the ground and active M-state of the complex in the space group I212121. We demonstrate that the relative orientation of symmetrical parts of the dimer is parallel ("U"-shaped) contrary to the gusset-like ("V"-shaped) form of the previously reported structures of the NpSRII/NpHtrII complex in the space group P21212, although the structures of the monomers taken individually are nearly the same. Computer modeling of the HAMP domain in the obtained "V"- and "U"-shaped structures revealed that only the "U"-shaped conformation allows for tight interactions of the receptor with the HAMP domain. This is in line with existing data and supports biological relevance of the "U" shape in the ground state. We suggest that the "V"-shaped structure may correspond to the active state of the complex and transition from the "U" to the "V"-shape of the receptor-transducer complex can be involved in signal transduction from the receptor to the signaling domain of NpHtrII.


    Organizational Affiliation

    Institute of Complex Systems (ICS), ICS-6: Structural Biochemistry, Research Centre Jülich, 52425 Jülich, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Sensory rhodopsin-2
A
248Natronomonas pharaonisMutation(s): 0 
Gene Names: sop2 (sopII)
Find proteins for P42196 (Natronomonas pharaonis)
Go to UniProtKB:  P42196
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Sensory rhodopsin II transducer
B
141Natronomonas pharaonisMutation(s): 0 
Gene Names: htr2 (htrII)
Find proteins for P42259 (Natronomonas pharaonis)
Go to UniProtKB:  P42259
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
RET
Query on RET

Download SDF File 
Download CCD File 
A
RETINAL
C20 H28 O
NCYCYZXNIZJOKI-OVSJKPMPSA-N
 Ligand Interaction
LFA
Query on LFA

Download SDF File 
Download CCD File 
A
EICOSANE
LIPID FRAGMENT
C20 H42
CBFCDTFDPHXCNY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.179 
  • Space Group: P 64
Unit Cell:
Length (Å)Angle (°)
a = 66.310α = 90.00
b = 66.310β = 90.00
c = 170.081γ = 120.00
Software Package:
Software NamePurpose
PHENIXrefinement
MOLREPphasing
iMOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
RSFRussian Federation14-14-00995

Revision History 

  • Version 1.0: 2017-02-15
    Type: Initial release