Abstract
Human immunodeficiency virus type 1 (HIV-1) tat exon I sequences were analyzed from six mother-infant pairs after perinatal transmission. The tat open reading frame was maintained in 140 of the 154 clones analyzed, with a 90.9% frequency of intact tat open reading frames. In addition, a low degree of heterogeneity was observed in tat sequences within mothers, within infants, and between epidemiologically linked mother-infant pairs. However, the distances of tat sequences between epidemiologically unlinked individuals were greater than in epidemiologically linked mother-infant pairs. The infant sequences showed amino acid sequence patterns similar to those present in their respective mothers. The functional domains required for Tat function, including amino-terminal, cysteine-rich, core and basic regions, which constitute domains for activation and RNA binding, were highly conserved in most of the sequences. Phylogenetic analysis of 154 mother-infant tat sequences showed that they formed distinct clusters for each mother-infant pair and grouped with subtype B sequence. These findings suggest that an intact and functional tat gene is conserved in HIV-1 mother-infant isolates that are involved in perinatal transmission.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 765-773 |
| Number of pages | 9 |
| Journal | AIDS Research and Human Retroviruses |
| Volume | 17 |
| Issue number | 8 |
| DOIs | |
| State | Published - 2001 |
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ASJC Scopus subject areas
- Immunology
- Virology
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Characterization of HIV type 1 tat sequences associated with perinatal transmission. / Husain, M.; Hahn, T.; Yedavalli, V. R K; Ahmad, Nafees -.
In: AIDS Research and Human Retroviruses, Vol. 17, No. 8, 2001, p. 765-773.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Characterization of HIV type 1 tat sequences associated with perinatal transmission
AU - Husain, M.
AU - Hahn, T.
AU - Yedavalli, V. R K
AU - Ahmad, Nafees -
PY - 2001
Y1 - 2001
N2 - Human immunodeficiency virus type 1 (HIV-1) tat exon I sequences were analyzed from six mother-infant pairs after perinatal transmission. The tat open reading frame was maintained in 140 of the 154 clones analyzed, with a 90.9% frequency of intact tat open reading frames. In addition, a low degree of heterogeneity was observed in tat sequences within mothers, within infants, and between epidemiologically linked mother-infant pairs. However, the distances of tat sequences between epidemiologically unlinked individuals were greater than in epidemiologically linked mother-infant pairs. The infant sequences showed amino acid sequence patterns similar to those present in their respective mothers. The functional domains required for Tat function, including amino-terminal, cysteine-rich, core and basic regions, which constitute domains for activation and RNA binding, were highly conserved in most of the sequences. Phylogenetic analysis of 154 mother-infant tat sequences showed that they formed distinct clusters for each mother-infant pair and grouped with subtype B sequence. These findings suggest that an intact and functional tat gene is conserved in HIV-1 mother-infant isolates that are involved in perinatal transmission.
AB - Human immunodeficiency virus type 1 (HIV-1) tat exon I sequences were analyzed from six mother-infant pairs after perinatal transmission. The tat open reading frame was maintained in 140 of the 154 clones analyzed, with a 90.9% frequency of intact tat open reading frames. In addition, a low degree of heterogeneity was observed in tat sequences within mothers, within infants, and between epidemiologically linked mother-infant pairs. However, the distances of tat sequences between epidemiologically unlinked individuals were greater than in epidemiologically linked mother-infant pairs. The infant sequences showed amino acid sequence patterns similar to those present in their respective mothers. The functional domains required for Tat function, including amino-terminal, cysteine-rich, core and basic regions, which constitute domains for activation and RNA binding, were highly conserved in most of the sequences. Phylogenetic analysis of 154 mother-infant tat sequences showed that they formed distinct clusters for each mother-infant pair and grouped with subtype B sequence. These findings suggest that an intact and functional tat gene is conserved in HIV-1 mother-infant isolates that are involved in perinatal transmission.
UR - http://www.scopus.com/inward/record.url?scp=0034921148&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0034921148&partnerID=8YFLogxK
U2 - 10.1089/088922201750237040
DO - 10.1089/088922201750237040
M3 - Article
C2 - 11429117
AN - SCOPUS:0034921148
VL - 17
SP - 765
EP - 773
JO - AIDS Research and Human Retroviruses
JF - AIDS Research and Human Retroviruses
SN - 0889-2229
IS - 8
ER -