Document 3261 DOCN M94A3261 TI V3 region sequences from HIV-1 isolates from India. DT 9412 AU Tripathy S; Renjifo B; McLane MF; Tripathy SP; Essex M; Dept. of Cancer Biology, Harvard School of Public Health, Boston,; Ma 02115. SO Int Conf AIDS. 1994 Aug 7-12;10(1):116 (abstract no. PA0084). Unique Identifier : AIDSLINE ICA10/94369314 AB AIM: To determine the V3 region sequences from HIV-1 isolates from heterosexually infected patients from India. METHODOLOGY: PBL samples were cocultured with normal PBLs and the DNA was extracted for PCR. The 1.5 kb gp120 fragment was cloned and the V3 region sequenced. RESULTS: All isolates belonged to the C subtype. Most isolates had amino-acid residues similar to the V3 loop consensus sequences published in the Los Alamos database (Nov '93 III-71). One isolate had a serine in the 6 th position of the V3 loop. Another isolate had an arginine in the 1st position, alanine in the 20 th position and a phenylalanine in the 22 nd position of the V3 loop. These residues have not so far been reported for the C subtype in the Los Alamos database. The N-linked glycosylation site proximal to the first cysteine residue of the V3 loop was absent in all the isolates. CONCLUSION: C subtype of HIV-1 was the strain transmitted through the heterosexual route in the HIV-1 isolates obtained from India. DE Amino Acid Sequence DNA, Viral/BLOOD/GENETICS Glycosylation Human HIV Envelope Protein gp120/CHEMISTRY/*GENETICS HIV Infections/*MICROBIOLOGY/TRANSMISSION HIV-1/CLASSIFICATION/*GENETICS/*ISOLATION & PURIF India Leukocytes, Mononuclear Peptide Fragments/CHEMISTRY/*GENETICS Sex Behavior MEETING ABSTRACT SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).