Characterization of mother-infant HIV type 1 gag p17 sequences associated with perinatal transmission.

Important note: Information in this article was accurate in 1999. The state of the art may have changed since the publication date.

Characterization of mother-infant HIV type 1 gag p17 sequences associated with perinatal transmission.

AIDS Res Hum Retroviruses. 1999 Jul 1;15(10):875-88. Unique Identifier : AIDSLINE +
Hahn T; Matala E; Chappey C; Ahmad N; Department of Microbiology and Immunology, College of Medicine,; The University of Arizona Health Sciences Center, Tucson 85724,; USA.

Abstract: The gag p17 matrix sequences of human immunodeficiency virus type 1 (HIV-1) from seven infected mother-infant pairs were analyzed after perinatal transmission. The p17 matrix open reading frame was maintained in 143 of the 166 clones analyzed (86.2% frequency of intact p17 open reading frames). The functional domains essential for p17 matrix function in HIV-1 replication, including targeting of Gag to the plasma membrane, virus assembly and release, envelope glycoprotein incorporation into virus particle, virus entry, and localization of the virus preintegration complex to the nucleus of nondividing cells, were highly conserved in most of the sequences. In addition, examination of the three-dimensional structure of the p17 matrix protein in mother-infant isolates showed a high degree of conservation of amino acids required for correct folding and biological activity. Several amino acid motifs common to most of the mother-infant pairs sequences, including pair-specific signature sequences, were observed. There was a low degree of heterogeneity of gag p17 sequences within mothers, within infants, and between mother-infant pairs, but the distances were greater between epidemiologically unlinked individuals. Phylogenetic analyses of 166 mother-infant pairs and 181 other p17 sequences available from HIV-1 databases revealed distinct clusters for each mother-infant pair and for other p17 sequences. In conclusion, these findings indicate that an intact and functional gag p17 matrix is maintained during maternal-fetal transmission and that several motifs in p17 may be associated with perinatal transmission.

Keywords: JOURNAL ARTICLE Adult Amino Acid Sequence Base Sequence Binding Sites Child, Preschool *Disease Transmission, Vertical DNA, Viral Female Gene Products, gag/CHEMISTRY/*GENETICS Human HIV Antigens/CHEMISTRY/*GENETICS HIV Infections/EPIDEMIOLOGY/*TRANSMISSION/VIROLOGY HIV-1/CLASSIFICATION/*GENETICS/ISOLATION & PURIF Infant Infant, Newborn Male Molecular Sequence Data Mutagenesis Perinatal Care Phylogeny Pregnancy Pregnancy Complications, Infectious/EPIDEMIOLOGY/*VIROLOGY Protein Conformation Support, U.S. Gov't, P.H.S. Variation (Genetics)
991130
A99B1086

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