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1.97.1.4: [formate-C-acetyltransferase]-activating enzyme

This is an abbreviated version!
For detailed information about [formate-C-acetyltransferase]-activating enzyme, go to the full flat file.

Word Map on EC 1.97.1.4

Reaction

S-adenosyl-L-methionine
+
dihydroflavodoxin
+
[formate C-acetyltransferase]-glycine
=
5'-deoxyadenosine
+
L-methionine
+
flavodoxin semiquinone
+
[formate C-acetyltransferase]-glycin-2-yl radical
+
H+

Synonyms

PFL-glycine:S-adenosyl-L-methionine H transferase (flavodoxin-oxidizing, S-adenosyl-L-methionine-cleaving), Activase, pyruvate formate-lyase, Formate acetyltransferase activase, Pyruvate formate-lyase activase, Pyruvate formate-lyase activating enzyme, PFL-AE, Formate-lyase-activating enzyme, PFL activase, PFL-activating enzyme, PFL, pyruvate formate lyase activating enzyme, PFL activating enzyme, pyruvate formate-lyase-activating enzyme, PflA

ECTree

     1 Oxidoreductases
         1.97 Other oxidoreductases
             1.97.1 Sole sub-subclass for oxidoreductases that do not belong in the other subclasses
                1.97.1.4 [formate-C-acetyltransferase]-activating enzyme

Cofactor

Cofactor on EC 1.97.1.4 - [formate-C-acetyltransferase]-activating enzyme

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COFACTOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
Ferredoxin
can partly substitute for flavodoxin
-
flavodoxin
preferred cofactor
-
S-adenosyl-L-methionine
[4Fe-4S]-center
-
an increase in pre-edge intensity is due to additional contributions from sulfide and thiolate of the Fe4S4 cluster into the C-S sigma* orbital. There is a backbonding interaction between the Fe4S4 cluster and C-S sigma* orbitals of S-adenosyl-L-methionine in this inner sphere complex. This backbonding is enhanced in the reduced form and this configurational interaction between the donor and acceptor orbitals facilitates the electron transfer from the cluster to S-adenosyl-L-methionine, that otherwise has a large outer sphere electron transfer barrier. The energy of the reductive cleavage of the C-S bond is sensitive to the dielectric of the protein in the immediate vicinity of the site as a high dielectric stabilizes the more charge separated reactant increasing the reaction barrier
additional information
reduced flavodoxin serves as an electron donor and SAM as a cosubstrate for PFL-AE to generate a 5'-deoxyadenosyl radical, which is responsible for PFL activation
-