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Cited by 680

The DOI matches its Crossref record; 3 of the 3 references it cites were found in a registry or an index.

Activation-induced cytidine deaminase deaminates deoxycytidine on single-stranded DNA but requires the action of RNase

Open access
Bransteitter, Ronda, Pham, Phuong, Scharff, Matthew D., Goodman, Myron F.·2003·Proceedings of the National Academy of Sciences

Abstract

The expression of activation-induced cytidine deaminase (AID) is prerequisite to a “trifecta” of key molecular events in B cells: class-switch recombination and somatic hypermutation in humans and mice and gene conversion in chickens. Although this critically important enzyme shares common sequence motifs with apolipoprotein B mRNA-editing enzyme, and exhibits deaminase activity on free deoxycytidine in solution, it has not been shown to act on either RNA or DNA. Recent mutagenesis data in Escherichia coli suggest that AID may deaminate dC on DNA, but its putative biochemical activities on either DNA or RNA remained a mystery. Here, we show that AID catalyzes deamination of dC residues on single-stranded DNA in vitro but not on double-stranded DNA, RNA–DNA hybrids, or RNA. Remarkably, it has no measurable deaminase activity on single-stranded DNA unless pretreated with RNase to remove inhibitory RNA bound to AID. AID catalyzes dC → dU deamination activity most avidly on double-stranded DNA substrates containing a small “transcription-like” single-stranded DNA bubble, suggesting a targeting mechanism for this enigmatic enzyme during somatic hypermutation.

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Metadata

Authors
Bransteitter, R., Pham, P., Scharff, M. D., & Goodman, M. F.
Venue
Proceedings of the National Academy of Sciences
Published
2003-03-21
Volume
100
Issue
7
Pages
4102-4107
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2036806870
Cited by
680
References
3
FWCI
20.16
Type
journal article
Language
en
Open access
green

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Bransteitter, R., Pham, P., Scharff, M. D., & Goodman, M. F. (2003). Activation-induced cytidine deaminase deaminates deoxycytidine on single-stranded DNA but requires the action of RNase. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.0730835100

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