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J. Virol., Sep 1995, 5455-5460, Vol 69, No. 9
LJ Parent, RP Bennett, RC Craven, TD Nelle, NK Krishna, JB Bowzard, CB Wilson, BA Puffer, RC Montelaro and JW Wills
The Gag proteins of Rous sarcoma virus and human immunodeficiency virus
(HIV) each contain a function involved in a late step in budding, defects
in which result in the accumulation of these molecules at the plasma
membrane. In the Rous sarcoma virus Gag protein (Pr76gag), this assembly
domain is associated with a PPPY motif, which is located at an internal
position between the MA and CA sequences. This motif is not contained
anywhere within the HIV Gag protein (Pr55gag), and the MA sequence is
linked directly to CA. Instead, a late assembly function of HIV has been
associated with the p6 sequence situated at the C terminus of Gag. Here we
demonstrate the remarkable finding that the late assembly domains from
these two unrelated Gag proteins are exchangeable between retroviruses and
can function in a positionally independent manner.
Copyright © 1995, American Society for Microbiology
Positionally independent and exchangeable late budding functions of the Rous sarcoma virus and human immunodeficiency virus Gag proteins
Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey 17033, USA.
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