Comparison of DNA polymerase activities between recombinant feline immunodeficiency and leukemia virus reverse transcriptases.

Abstract:

:In this study, we present enzymatic differences found between recombinant RTs derived from feline leukemia virus and feline immunodeficiency virus. Firstly, FIV RT showed low steady state K(m) values for dNTPs compared to FeLV RT. Consistent with this, FIV RT synthesized DNA more efficiently than FeLV RT at low dNTP concentrations. We observed similar concentration-dependent activity differences between other lentiviral (HIV-1 and SIV) and non-lentiviral (MuLV and AMV) RTs. Second, FeLV RT showed less efficient misincorporation with biased dNTP pools and mismatch primer extension capabilities, compared to FIV RT. In M13mp2 lacZalpha forward mutation assays, FeLV RT displayed approximately 11-fold higher fidelity than FIV RT. Finally, FeLV RT was less sensitive to 3TCTP and ddATP than FIV RT. This study represents the comprehensive enzymatic characterization of RTs from a lentivirus and a non-lentivirus retrovirus from the same host species. The data presented here support enzymatic divergences seen among retroviral RTs.

journal_name

Virology

journal_title

Virology

authors

Operario DJ,Reynolds HM,Kim B

doi

10.1016/j.virol.2005.02.010

subject

Has Abstract

pub_date

2005-04-25 00:00:00

pages

106-21

issue

1

eissn

0042-6822

issn

1096-0341

pii

S0042-6822(05)00112-1

journal_volume

335

pub_type

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