ID   4.4.1.36
DE   Hercynylcysteine S-oxide lyase.
CA   S-(hercyn-2-yl)-L-cysteine S-oxide + a reduced electron acceptor =
CA   ergothioneine + pyruvate + ammonia + an oxidized electron acceptor.
CF   Pyridoxal 5'-phosphate.
CC   -!- The enzyme, characterized from the bacterium Mycobacterium smegmatis,
CC       cayalyses the last step in the pathway of ergothioneine biosynthesis.
CC   -!- The enzyme forms a 2-sulfenohercynine intermediate, which is reduced
CC       to ergothioneine non-enzymically by a thiol.
CC   -!- In vitro, DTT can serve this function.
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