Ornpreya SuptawiwatRuengpung SutthentTun Hou LeePrasert AuewarakulMahidol UniversityHarvard School of Public Health2018-07-242018-07-242003-04-25Virology. Vol.309, No.1 (2003), 1-9004268222-s2.0-0037466523https://repository.li.mahidol.ac.th/handle/20.500.14594/20908Expression of HIV-1 genes is regulated at multiple levels including the complex RNA splicing and transport mechanisms. Multiple cis-acting elements involved in these regulations have been previously identified in various regions of HIV-1 genome. Here we show that another cis-acting element was present in HIV-1 env region. This element enhanced the expression of Gag when inserted together with Rev response element (RRE) into a truncated HIV-1 genome in the presence of Rev. The enhancing activity was mapped to a 263-bp fragment in the gp41 region downstream to RRE. RNA analysis showed that it might function by promoting RNA stability and Rev-dependent RNA export. The enhancement was specific to Rev-dependent expression, since it did not enhance Gag expression driven by Sam68, a cellular protein that has been shown to be able to substitute for Rev in RNA export function. © 2003 Elsevier Science (USA). All rights reserved.Mahidol UniversityImmunology and MicrobiologyArticleSCOPUS10.1016/S0042-6822(02)00084-3