Heptad-repeat regions of respiratory syncytial virus F1 protein form a six-membered coiled-coil complex

被引:46
作者
Lawless-Delmedico, MK [1 ]
Sista, P [1 ]
Sen, R [1 ]
Moore, NC [1 ]
Antczak, JB [1 ]
White, JM [1 ]
Greene, RJ [1 ]
Leanza, KC [1 ]
Matthews, TJ [1 ]
Lambert, DM [1 ]
机构
[1] Trimeris Inc, Durham, NC 27707 USA
关键词
D O I
10.1021/bi000471y
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The Respiratory Syncytial Virus (RSV) fusogenic glycoprotein Fl was characterized using biochemical and biophysical techniques. Two heptad-repeat (HR) regions within Fl were shown to interact. Proteinase-K digestion experiments highlight the HR1 region (located proximal to the fusion peptide sequence) of the Fl protein to which an HR2-derived (located proximal to the membrane-spanning domain) peptide binds, thus protecting both the protein and peptide from digestion. Solution-phase analysis of HR1-derived peptides shows that these peptides adopt helical secondary structure as measured by circular dichroism. Sedimentation equilibrium studies indicate that these HR1 peptides self-associate in a monomer/trimer equilibrium with an association constant of 5.2 x 10(8) M-2. In contrast, HR2-derived peptides form random monomers in solution. CD analysis of mixtures containing peptides from the two regions demonstrate their propensity to interact and form a very stable (T-m = 87 degrees C), helical (86% helicity) complex comprised of three HR1 and three HR2 members.
引用
收藏
页码:11684 / 11695
页数:12
相关论文
共 60 条
[1]   Structural basis for paramyxovirus-mediated membrane fusion [J].
Baker, KA ;
Dutch, RE ;
Lamb, RA ;
Jardetzky, TS .
MOLECULAR CELL, 1999, 3 (03) :309-319
[2]  
BOLOGNESI D, 2000, 7 C RETR OPP INF SAN
[3]   LEUCINE ZIPPER MOTIF EXTENDS [J].
BUCKLAND, R ;
WILD, F .
NATURE, 1989, 338 (6216) :547-547
[4]   STRUCTURE OF INFLUENZA HEMAGGLUTININ AT THE PH OF MEMBRANE-FUSION [J].
BULLOUGH, PA ;
HUGHSON, FM ;
SKEHEL, JJ ;
WILEY, DC .
NATURE, 1994, 371 (6492) :37-43
[5]   Three-dimensional solution structure of the 44 kDa ectodomain of SIV gp41 [J].
Caffrey, M ;
Cai, ML ;
Kaufman, J ;
Stahl, SJ ;
Wingfield, PT ;
Covell, DG ;
Gronenborn, AM ;
Clore, GM .
EMBO JOURNAL, 1998, 17 (16) :4572-4584
[6]  
CANTOR CR, 1980, BIOPHYSICAL CHEM 2
[7]   A SPRING-LOADED MECHANISM FOR THE CONFORMATIONAL CHANGE OF INFLUENZA HEMAGGLUTININ [J].
CARR, CM ;
KIM, PS .
CELL, 1993, 73 (04) :823-832
[8]   HEPTAD REPEAT SEQUENCES ARE LOCATED ADJACENT TO HYDROPHOBIC REGIONS IN SEVERAL TYPES OF VIRUS FUSION GLYCOPROTEINS [J].
CHAMBERS, P ;
PRINGLE, CR ;
EASTON, AJ .
JOURNAL OF GENERAL VIROLOGY, 1990, 71 :3075-3080
[9]   Core structure of gp41 from the HIV envelope glycoprotein [J].
Chan, DC ;
Fass, D ;
Berger, JM ;
Kim, PS .
CELL, 1997, 89 (02) :263-273
[10]   A MOLECULAR CLASP IN THE HUMAN-IMMUNODEFICIENCY-VIRUS (HIV) TYPE-1 TM PROTEIN DETERMINES THE ANTI-HIV ACTIVITY OF GP41 DERIVATIVES - IMPLICATION FOR VIRAL FUSION [J].
CHEN, CH ;
MATTHEWS, TJ ;
MCDANAL, CB ;
BOLOGNESI, DP ;
GREENBERG, ML .
JOURNAL OF VIROLOGY, 1995, 69 (06) :3771-3777