Involved in ionization of N3 of dUMP, leading to its activation
Schiff-base intermediate with substrate; via topaquinone
O-(3'-phospho-DNA)-tyrosine intermediate
Tryptophyl-tyrosyl-methioninium (Tyr-Met) (with Trp-107)
Gly-cisPro motif, important for rejection of L-amino acids
Cysteine sulfenic acid (-SOH) intermediate; for peroxidase activity
Nucleophile; cysteine thiosulfonate intermediate
Alanine and proline-rich secreted protein Apa
Isoglutamyl lysine isopeptide (Lys-Gln) (interchain with Q-Cter in protein Pup)
Tat pathway signal sequence domain protein
Phosphatidylserine decarboxylase alpha chain
Phosphatidylserine decarboxylase beta chain
Schiff-base intermediate with substrate; via pyruvic acid
Schiff-base intermediate with acetaldehyde
Tryptophyl-tyrosyl-methioninium (Tyr-Met) (with Trp-116)
Phosphoribosylglycinamide formyltransferase
Phosphocysteine intermediate; for EIIB activity
Nucleophile; for GTP cyclohydrolase activity
Proton acceptor; for GTP cyclohydrolase activity
Proton donor; for beta-elimination activity
Proton donor; for delta-elimination activity
Proton acceptor; for glutaminase activity
O-(5'-phospho-DNA)-tyrosine intermediate
Cysteine sulfenic acid (-SOH) intermediate
Isoglutamyl lysine isopeptide (Gln-Lys) (interchain with K-? in acceptor proteins)
Resolvase/invertase-type recombinase catalytic
Arginine biosynthesis bifunctional protein ArgJ alpha chain
Arginine biosynthesis bifunctional protein ArgJ beta chain
ABC transporter substrate-binding protein