Coenzyme PQQ synthesis protein C Ring cyclization and eight-electron oxidation of 3a-(2- amino-2-carboxyethyl)-4,5-dioxo-4,5,6,7,8,9-hexahydroquinoline- 7,9-dicarboxylic-acid to PQQ (By similarity). PA1987 pqqC MSRAAMDRAEFERALRDKGRYYHIHHPFHVAMYEGRASREQIQGWVANRFYYQVNIPLKDAAILANCPDREVRREWIQRILDHDGAPGEAGGIEAWLRLAEAVGLEREQVLSEERVLPGVRFAVDAYVNFARRASWQEAASSSLTELFAPQIHQSRLDSWPRHYPWIEAAGYEYFRSRLAQARRDVEHGLRITLEHYRTREAQERMLDILQFKLDVLWSMLDAMSMAYELERPPYHTVTRERVWHRGLAS Pyrroloquinoline quinone biosynthesis protein C Pyrroloquinoline-quinone synthase 250 PQQC_PSEAE