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Journal Articles Cellular and Molecular Life Sciences Year : 2022

Mechanisms supporting aminoadenine-based viral DNA genomes

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Abstract

Bacteriophage genomes are the richest source of modified nucleobases of any life form. Of these, 2,6 diaminopurine, which pairs with thymine by forming three hydrogen bonds violates Watson and Crick’s base pairing. 2,6 diaminopurine initially found in the cyanophage S-2L is more widespread than expected and has also been detected in phage infecting Gram-negative and Gram-positive bacteria. The biosynthetic pathway for aminoadenine containing DNA as well as the exclusion of adenine are now elucidated. This example of a natural deviation from the genetic code represents only one of the possibilities explored by nature and provides a proof of concept for the synthetic biology of non-canonical nucleic acids.
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pasteur-03549987 , version 1 (24-02-2022)

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Attribution - CC BY 4.0

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Pierre-Alexandre Kaminski. Mechanisms supporting aminoadenine-based viral DNA genomes. Cellular and Molecular Life Sciences, 2022, 79 (1), pp.51. ⟨10.1007/s00018-021-04055-7⟩. ⟨pasteur-03549987⟩
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