Song Haihan, Nakayama Emi E, Yokoyama Masaru, Sato Hironori, Levy Jay A, Shioda Tatsuo
Department of Viral Infections, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-Oka, Suita, Osaka 565-0871, Japan.
J Virol. 2007 Jul;81(13):7280-5. doi: 10.1128/JVI.00406-07. Epub 2007 May 2.
Human immunodeficiency virus type 2 (HIV-2) strains vary widely in their abilities to grow in Old World monkey (OWM) cells such as those of cynomolgus monkeys (CM). We evaluated eight HIV-2 isolates for their sensitivities to CM TRIM5alpha, an anti-HIV factor in OWM cells. We found that different HIV-2 isolates showed differences in their sensitivities to CM TRIM5alpha. Sequence analysis showed that TRIM5alpha-sensitive viruses had proline at the 120th position of the capsid protein (CA), whereas TRIM5alpha-resistant viruses had either alanine or glutamine. Mutagenesis studies indicated that the single amino acid at the 120th position indeed affected the sensitivity of the virus to CM TRIM5alpha.
2型人类免疫缺陷病毒(HIV-2)毒株在旧世界猴(OWM)细胞(如食蟹猴(CM)细胞)中的生长能力差异很大。我们评估了8株HIV-2分离株对CM TRIM5α(一种OWM细胞中的抗HIV因子)的敏感性。我们发现不同的HIV-2分离株对CM TRIM5α的敏感性存在差异。序列分析表明,对TRIM5α敏感的病毒在衣壳蛋白(CA)的第120位有脯氨酸,而对TRIM5α耐药的病毒在该位置则为丙氨酸或谷氨酰胺。诱变研究表明,第120位的单个氨基酸确实影响了病毒对CM TRIM5α的敏感性。