Macromolecule Content

• Total Structure Weight: 43.29 kDa 
• Atom Count: 3057 
• Residue Count: 369 
• Unique protein chains: 1

2EZO

SOLUTION NMR STRUCTURE OF ECTODOMAIN OF SIV GP41, RESTRAINED REGULARIZED MEAN STRUCTURE

• DOI: 10.2210/pdb2EZO/pdb

• Classification: VIRAL PROTEIN
• Organism(s): Simian immunodeficiency virus
• Mutation(s): No 


• Deposited: 1998-05-20 Released: 1998-10-14 
• Deposition Author(s): Caffrey, M., Gronenborn, A.M., Clore, G.M.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Submitted: 1 
• Selection Criteria: REGULARIZED MEAN STRUCTURE 

Literature

Three-dimensional solution structure of the 44 kDa ectodomain of SIV gp41.

Caffrey, M., Cai, M., Kaufman, J., Stahl, S.J., Wingfield, P.T., Covell, D.G., Gronenborn, A.M., Clore, G.M.

(1998) EMBO J 17: 4572-4584

• PubMed: 9707417 
• DOI: 10.1093/emboj/17.16.4572
• Structures With Same Primary Citation


• PubMed Abstract: 
  

The solution structure of the ectodomain of simian immunodeficiency virus (SIV) gp41 (e-gp41), consisting of residues 27-149, has been determined by multidimensional heteronuclear NMR spectroscopy. SIV e-gp41 is a symmetric 44 kDa trimer with each subunit consisting of antiparallel N-terminal (residues 30-80) and C-terminal (residues 107-147) helices connected by a 26 residue loop (residues 81-106). The N-terminal helices of each subunit form a parallel coiled-coil structure in the interior of the complex which is surrounded by the C-terminal helices located on the exterior of the complex. The loop region is ordered and displays numerous intermolecular and non-sequential intramolecular contacts. The helical core of SIV e-gp41 is similar to recent X-ray structures of truncated constructs of the helical core of HIV-1 e-gp41. The present structure establishes unambiguously the connectivity of the N- and C-terminal helices in the trimer, and characterizes the conformation of the intervening loop, which has been implicated by mutagenesis and antibody epitope mapping to play a key role in gp120 association. In conjunction with previous studies, the solution structure of the SIV e-gp41 ectodomain provides insight into the binding site of gp120 and the mechanism of cell fusion. The present structure of SIV e-gp41 represents one of the largest protein structures determined by NMR to date.

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Related Citations: 

• Determination of the Secondary Structure and Global Topology of the 44 kDa Ectodomain of Gp41 of the Simian Immunodeficiency Virus by Multidimensional Nuclear Magnetic Resonance Spectroscopy
  Caffrey, M., Cai, M., Kaufman, J., Stahl, S.J., Wingfield, P.T., Gronenborn, A.M., Clore, G.M.
  (1997) J Mol Biol 271: 819

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Organizational Affiliation: 

Laboratory of Chemical Physics, Building 5, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-0520, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
GP41	A, B, C	123	Simian immunodeficiency virus	Mutation(s): 0  Gene Names: env
Find proteins for E7CWP5 (Simian immunodeficiency virus) Explore E7CWP5  Go to UniProtKB:  E7CWP5

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Submitted: 1 
• Selection Criteria: REGULARIZED MEAN STRUCTURE 
• OLDERADO: 2EZO Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1998-05-20 
• Released Date: 1998-10-14 
Deposition Author(s): Caffrey, M., Gronenborn, A.M., Clore, G.M.

Revision History 

• Version 1.0: 1998-10-14
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance