Macromolecule Content

• Total Structure Weight: 16.37 kDa 
• Atom Count: 1157 
• Residue Count: 148 
• Unique protein chains: 1

1Q9G

NMR STRUCTURE OF THE OUTER MEMBRANE PROTEIN OMPX IN DHPC MICELLES

• DOI: 10.2210/pdb1Q9G/pdb

• Classification: MEMBRANE PROTEIN
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2003-08-25 Released: 2004-09-21 
• Deposition Author(s): Fernandez, C., Hilty, C., Wider, G., Guntert, P., Wuthrich, K.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 400 
• Conformers Submitted: 20 
• Selection Criteria: target function 

Literature

NMR structure of the integral membrane protein OmpX

Fernandez, C., Hilty, C., Wider, G., Guntert, P., Wuthrich, K.

(2004) J Mol Biol 336: 1211-1221

• PubMed: 15037080 
• DOI: 10.1016/j.jmb.2003.09.014
• Primary Citation of Related Structures:  
  1Q9G, 1Q9F


• PubMed Abstract: 
  

The structure of the integral membrane protein OmpX from Escherichia coli reconstituted in 60 kDa DHPC micelles (OmpX/DHPC) was calculated from 526 NOE upper limit distance constraints. The structure determination was based on complete sequence-specific assignments for the amide protons and the Val, Leu, and Ile(delta1) methyl groups in OmpX, which were selectively protonated on a perdeuterated background. The solution structure of OmpX in the DHPC micelles consists of a well-defined, eight-stranded antiparallel beta-barrel, with successive pairs of beta-strands connected by mobile loops. Several long-range NOEs observed outside of the transmembrane barrel characterize an extension of a four-stranded beta-sheet beyond the height of the barrel. This protruding beta-sheet is believed to be involved in intermolecular interactions responsible for the biological functions of OmpX. The present approach for de novo structure determination should be quite widely applicable to membrane proteins reconstituted in mixed micelles with overall molecular masses up to about 100 kDa, and may also provide a platform for additional functional studies.

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Related Citations: 

• Side chain NMR assignments in the membrane protein OmpX reconstituted in DHPC micelles
  Hilty, C., Fernandez, C., Wider, G., Wuthrich, K.
  (2002) J Biomol NMR 23: 289

• Stereospecific assignments of the isopropyl methyl groups of the membrane protein OmpX in DHPC micelles
  Hilty, C., Wider, G., Fernandez, C., Wuthrich, K.
  () To be published --: --

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Organizational Affiliation: 

Institut für Molekularbiologie und Biophysik, Eidgenössische Technische Hochschule Zürich CH-8093 Zürich, Switzerland.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Outer membrane protein X	A	148	Escherichia coli	Mutation(s): 1  Gene Names: ompX
Find proteins for P0A917 (Escherichia coli (strain K12)) Explore P0A917  Go to UniProtKB:  P0A917

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 400 
• Conformers Submitted: 20 
• Selection Criteria: target function 
• OLDERADO: 1Q9G Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-08-25 
• Released Date: 2004-09-21 
Deposition Author(s): Fernandez, C., Hilty, C., Wider, G., Guntert, P., Wuthrich, K.

Revision History 

• Version 1.0: 2004-09-21
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance