Terminal deoxynucleotidyltransferase: the story of an untemplated DNA polymerase also capable of DNA bridging and templated synthesis across strands - Archive ouverte HAL Access content directly
Journal Articles Current Opinion in Structural Biology Year : 2018

Terminal deoxynucleotidyltransferase: the story of an untemplated DNA polymerase also capable of DNA bridging and templated synthesis across strands

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Abstract

Terminal deoxynucleotidyltransferase (TdT) is a member of the polX family which is involved in DNA repair. It has been known for years as an untemplated DNA polymerase used during V(D)J recombination to generate diversity at the CDR3 region of immunoglobulins and T-cell receptors. Recently, however, TdT was crystallized in the presence of a complete DNA synapsis made of two double-stranded DNA (dsDNA), each with a 3' protruding end, and overlapping with only one micro-homology base-pair, thus giving structural insight for the first time into DNA synthesis across strands. It was subsequently shown that TdT indeed has an in trans template-dependent activity in the presence of an excess of the downstream DNA duplex. A possible biological role of this dual activity is discussed.
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pasteur-03414957 , version 1 (04-11-2021)

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Attribution - NonCommercial - NoDerivatives - CC BY 4.0

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Jérôme Loc’h, Marc Delarue. Terminal deoxynucleotidyltransferase: the story of an untemplated DNA polymerase also capable of DNA bridging and templated synthesis across strands. Current Opinion in Structural Biology, 2018, 53, pp.22-31. ⟨10.1016/j.sbi.2018.03.019⟩. ⟨pasteur-03414957⟩

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