Alternate polypurine tracts affect rous sarcoma virus integration in vivo.
When the endogenous polypurine tract (PPT) of the Rous sarcoma virus (RSV)-derived vector RSVP(A)Z was replaced with alternate retroviral PPTs, the fraction of unintegrated viral DNA with the normal consensus ends significantly decreased and the retention of part of the PPT significantly increased. If the terminus of the U3 long terminal repeat (LTR) is aberrant, RSV integrase can correctly process and integrate the normal U5 LTR into the host genome. However, the canonical CA is not involved in joining the aberrant U3 LTR to the host DNA, generating either large duplications or deletions of the host sequences instead of the normal 5- or 6-bp duplication.
Oh
Jangsuk
J
HIV Drug Resistance Program, National Cancer Institute at Frederick, Frederick, MD 21702-1201, USA.
Chang
Kevin W
KW
Alvord
W Gregory
WG
Hughes
Stephen H
SH
D001358:Avian Sarcoma Viruses / Q000235:genetics* / Q000502:physiology*; D005822:Genetic Vectors; D019426:Integrases / Q000502:physiology; D011995:Recombination, Genetic; D020079:Terminal Repeat Sequences; D016662:Virus Integration
D019426:Integrases