Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 35.45 kDa 
• Atom Count: 2142 
• Modelled Residue Count: 219 
• Deposited Residue Count: 239 
• Unique protein chains: 1

3QAP

Crystal structure of Natronomonas pharaonis sensory rhodopsin II in the ground state

• DOI: 10.2210/pdb3QAP/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Natronomonas pharaonis
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2011-01-11 Released: 2011-09-14 
• Deposition Author(s): Gushchin, I., Reshetnyak, A., Borshchevskiy, V., Ishchenko, A., Round, E., Grudinin, S., Engelhard, M., Buldt, G., Gordeliy, V.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.173 
• R-Value Work: 0.152 
• R-Value Observed: 0.153 

Literature

Active State of Sensory Rhodopsin II: Structural Determinants for Signal Transfer and Proton Pumping.

Gushchin, I., Reshetnyak, A., Borshchevskiy, V., Ishchenko, A., Round, E., Grudinin, S., Engelhard, M., Buldt, G., Gordeliy, V.

(2011) J Mol Biol 412: 591-600

• PubMed: 21840321 
• DOI: 10.1016/j.jmb.2011.07.022
• Primary Citation of Related Structures:  
  3QAP, 3QDC


• PubMed Abstract: 
  

The molecular mechanism of transmembrane signal transduction is still a pertinent question in cellular biology. Generally, a receptor can transfer an external signal via its cytoplasmic surface, as found for G-protein-coupled receptors such as rhodopsin, or via the membrane domain, such as that in sensory rhodopsin II (SRII) in complex with its transducer, HtrII. In the absence of HtrII, SRII functions as a proton pump. Here, we report on the crystal structure of the active state of uncomplexed SRII from Natronomonas pharaonis, NpSRII. The problem with a dramatic loss of diffraction quality upon loading of the active state was overcome by growing better crystals and by reducing the occupancy of the state. The conformational changes in the region comprising helices F and G are similar to those observed for the NpSRII-transducer complex but are much more pronounced. The meaning of these differences for the understanding of proton pumping and signal transduction by NpSRII is discussed.

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Organizational Affiliation: 

Laboratoire des Protéines Membranaires, Institut de Biologie Structurale J.-P. Ebel, UMR5075 CEA-CNRS-UJF, 38027 Grenoble, France.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Sensory rhodopsin-2	A	239	Natronomonas pharaonis	Mutation(s): 0  Gene Names: sop2, sopII
Membrane protein Mpstruc	Group:  TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group:  Bacterial, Algal, Viral, and Unusual Rhodopsins	Protein:  Sensory Rhodopsin II (SRII) in active state
Find proteins for P42196 (Natronomonas pharaonis) Explore P42196  Go to UniProtKB:  P42196

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
L2P	S [auth A], V [auth A]	2,3-DI-PHYTANYL-GLYCEROL C43 H88 O3 ISDBCJSGCHUHFI-UMZPFTBHSA-N
BOG	C [auth A]	octyl beta-D-glucopyranoside C14 H28 O6 HEGSGKPQLMEBJL-RKQHYHRCSA-N
RET	B [auth A]	RETINAL C20 H28 O NCYCYZXNIZJOKI-OVSJKPMPSA-N
LFA	AA [auth A],  BA [auth A],  CA [auth A],  D [auth A],  DA [auth A],  E [auth A],  EA [auth A],  F [auth A],  FA [auth A],  G [auth A],  GA [auth A],  H [auth A],  HA [auth A],  I [auth A],  J [auth A],  K [auth A],  L [auth A],  M [auth A],  N [auth A],  O [auth A],  P [auth A],  Q [auth A],  R [auth A],  T [auth A],  U [auth A],  W [auth A],  X [auth A],  Y [auth A],  Z [auth A]	EICOSANE C20 H42 CBFCDTFDPHXCNY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.173 
• R-Value Work: 0.152 
• R-Value Observed: 0.153 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 86.99	α = 90
b = 128.09	β = 90
c = 50.63	γ = 90

Software Package:

Software Name	Purpose
ADSC	data collection
MOLREP	phasing
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2011-01-11 
• Released Date: 2011-09-14 
Deposition Author(s): Gushchin, I., Reshetnyak, A., Borshchevskiy, V., Ishchenko, A., Round, E., Grudinin, S., Engelhard, M., Buldt, G., Gordeliy, V.

Revision History  

• Version 1.0: 2011-09-14
  Type: Initial release
  
• Version 1.1: 2011-09-28
  Changes: Database references
• Version 1.2: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Data collection, Derived calculations, Structure summary