The catalytic activity of REV1 is employed during immunoglobulin gene diversification in DT40.

Abstract:

:REV1 plays a key role in vertebrate translesion synthesis. Although its deoxycytidyl transferase activity is dispensable for tolerance of DNA damage caused by a number of mutagens, its extreme C terminus, which interacts with other translesion polymerases and PCNA, is essential. By examining immunoglobulin diversification in the genetically tractable chicken cell line DT40 we show that the generation of non-templated point mutations from C/G to G/C does require the catalytic activity of REV1. This provides the first clear evidence that the catalytic activity of REV1 is utilised in vivo in higher eukaryotes and is involved in immunoglobulin diversification. Although rev1 DT40 cells incorporate few point mutations, a mutant lacking the C terminus of REV1 exhibits a similar level to that seen in wild-type cells. Thus, the polymerase selection or stabilisation role of REV1 does not appear to play a major role in the bypass of AID-dependent abasic sites.

journal_name

Mol Immunol

journal_title

Molecular immunology

authors

Ross AL,Sale JE

doi

10.1016/j.molimm.2005.09.017

subject

Has Abstract

pub_date

2006-04-01 00:00:00

pages

1587-94

issue

10

eissn

0161-5890

issn

1872-9142

pii

S0161-5890(05)00352-4

journal_volume

43

pub_type

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