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Environment-dependent photochemical behavior of adenosylcobalamin and its influence on the quenching of the 5′-deoxyadenosyl radical
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DOI：10.1016/j.jinorgbio.2026.113400.png)
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Abstract
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• The photoreceptor CarH cleaves AdoCbl to form Co(I) and an olefin product. • This reactivity is similar to the photochemistry of simple alkylcobalamins. • However, AdoCbl in solution always produces Co(II) and a cyclic product. • The same is observed for AdoCbl bound to typical AdoCbl-dependent proteins. • CarH is very unusual in promoting intrinsic alkyl-radical behavior for 5′-dAdo.
Keywords:
Photochemistry
Cobalamin
Radical chemistry
Time-resolved absorption spectroscopy
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