Genotypic characterization of HIV type 1 env gp160 sequences from three regions in Thailand.
We report 25 env gp160 sequences from patients in three geographically distinct districts of Thailand, i.e., Lampang in the north, Trang in the south and Rayong in the east. One of these is a CRF01_AE/subtype B recombinant and the other 24 sequences are purely CRF01_AE. Very little interpopulation diversity was observed between the sequences from the three different geographic regions and from those previously reported by our laboratory from central Thailand. Potential N-linked glycosylation sites (PNLGs) were reasonably conserved among the 25 sequences: we found 15 highly conserved PNLGs on gp120 and 4 almost fully conserved PNLGs on gp41. Analysis of coreceptor tropism revealed that six of the isolates were dual tropic and the others were R5 tropic. We also examined a rare seven amino acid deletion found in one isolate at position 847-853 on gp41. These results may enhance our understanding of HIV-1 currently circulating in Thailand.
de Silva
U Chandimal
UC
Thailand-Japan Research Collaboration Centre on Emerging and Re-emerging Infections , Nonthaburi 11000, Thailand . chandi@biken.osaka-u.ac.jp
Warachit
Jiranan
J
Sattagowit
Nerisa
N
Jirapongwattana
Chanin
C
Panthong
Sumolrat
S
Utachee
Piraporn
P
Yasunaga
Teruo
T
Ikuta
Kazuyoshi
K
Kameoka
Masanori
M
Boonsathorn
Naphatsawan
N
D016000:Cluster Analysis; D017124:Conserved Sequence; D005838:Genotype; D005843:Geography; D019302:HIV Envelope Protein gp160 / Q000235:genetics*; D015658:HIV Infections / Q000821:virology*; D015497:HIV-1 / Q000235:genetics* / Q000302:isolation & purification; D006801:Humans; D017720:Molecular Epidemiology; D008969:Molecular Sequence Data; D010802:Phylogeny; D011110:Polymorphism, Genetic; D015728:Receptors, HIV / Q000032:analysis; D017422:Sequence Analysis, DNA; D013785:Thailand
D019302:HIV Envelope Protein gp160; D015728:Receptors, HIV; C514797:gp160 protein, Human immunodeficiency virus 1