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. 2016 Sep 20;138(41):13706–13716. doi: 10.1021/jacs.6b08200

Scheme 2. First PCET Step in the RT Pathway of E. coli Class Ia RNR.

Scheme 2

(A) In the wt-β2/α2/CDP/ATP complex, PT from Fe1–H2O to Y122• occurs concomitant with ET from Y356 to Y122•. (B) In the NO2Y122•-β2/α2/CDP/ATP complex, ET from Y356 to Y122• generates the NO2Y phenolate. RT initiation in F3Y122•-β2 is proposed to generate the F3Y122 phenolate (Scheme 1).