2-oxo-4-hydroxy-4-carboxy-5-ureidoimidazoline decarboxylase
Proton donor; for OHCU decarboxylase activity
Cysteine sulfenic acid (-SOH) intermediate; for peroxidase activity
Involved in ionization of N3 of dUMP, leading to its activation
Schiff-base intermediate with D-ribose 5-phosphate
Removed in mature form; by autocatalysis
O-(5'-phospho-DNA)-tyrosine intermediate
Tryptophyl-tyrosyl-methioninium (Tyr-Met) (with Trp-77)
Schiff-base intermediate with acetaldehyde