Model for the structure of the HIV gp41 ectodomain: insight into the intermolecular interactions of the gp41 loop.
In human immunodeficiency virus (HIV) the viral envelope proteins gp41 and gp120 form a non-covalent complex, which is a potential target for AIDS therapies. In addition gp41 plays a possible role in HIV infection of B cells via the complement system. In an effort to better understand the molecular interactions of gp41, the structure of the HIV gp41 ectodomain has been modeled using the NMR restraints of the simian immunodeficiency virus (SIV) gp41 ectodomain (M. Caffrey, M. Cai, J. Kaufman, S.J. Stahl, P.T. Wingfield, A.M. Gronenborn, G.M. Clore, Solution structure of the 44 kDa ectodomain of SIV gp41, EMBO J. 17 (1998) 4572--4584). The resulting model presents the first structural information for the HIV gp41 loop, which has been implicated to play a direct role in binding to gp120 and C1q of the complement system.
Caffrey
M
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Department of Biochemistry and Molecular Biology, University of Illinois at Chicago, Chicago, IL 60612, USA. caffrey@uic.edu
D000595:Amino Acid Sequence; D015922:Complement C1q / Q000737:chemistry; D003198:Computer Simulation; D015699:HIV Envelope Protein gp120 / Q000737:chemistry; D015700:HIV Envelope Protein gp41 / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008562:Membrane Glycoproteins / Q000737:chemistry; D008958:Models, Molecular; D008969:Molecular Sequence Data; D011487:Protein Conformation; D012191:Retroviridae Proteins / Q000737:chemistry; D016415:Sequence Alignment
D015699:HIV Envelope Protein gp120; D015700:HIV Envelope Protein gp41; D008562:Membrane Glycoproteins; D012191:Retroviridae Proteins; C082614:SIV envelope protein gp41; D015922:Complement C1q