Cysteine sulfenic acid (-SOH) intermediate; for peroxidase activity
Isoglutamyl lysine isopeptide (Gln-Lys) (interchain with K-? in acceptor proteins)
Interaction with polymerase core subunit RpoC
Schiff-base intermediate with substrate; via pyruvic acid
Schiff-base intermediate with D-ribose 5-phosphate
Cytochrome bc1 complex cytochrome c subunit
Isoglutamyl lysine isopeptide (Lys-Gln) (interchain with Q-Cter in protein Pup)
Nucleophile; for GTP cyclohydrolase activity
Proton acceptor; for GTP cyclohydrolase activity