IUBMB Enzyme Nomenclature


Accepted name: 2-phospho-L-lactate transferase

Reaction: (1) (2S)-lactyl-2-diphospho-5'-guanosine + 7,8-didemethyl-8-hydroxy-5-deazariboflavin = GMP + factor 420-0
(2) enolpyruvoyl-2-diphospho-5'-guanosine + 7,8-didemethyl-8-hydroxy-5-deazariboflavin = GMP + dehydro factor 420-0
(3) 3-[(R)-glyceryl]-diphospho-5'-guanosine + 7,8-didemethyl-8-hydroxy-5-deazariboflavin = GMP + 3PG-factor 420-0

For diagram of coenzyme F420 biosynthesis, click here

Glossary: factor 420 = coenzyme F420 = N-(N-{O-[5-(8-hydroxy-2,4-dioxo-2,3,4,10-tetrahydropyrimido[4,5-b]quinolin-10-yl)-5-deoxy-L-ribityl-1-phospho]-(S)-lactyl}-γ-L-glutamyl)-L-glutamate
dehydro coenzyme F420-0 = 7,8-didemethyl-8-hydroxy-5-deazariboflavin 5'-(1-carboxyvinyl)phosphate
GMP = guanosine 5'-phosphate

Other name(s): cofD (gene name); fbiA (gene name); LPPG:Fo 2-phospho-L-lactate transferase; LPPG:7,8-didemethyl-8-hydroxy-5-deazariboflavin 2-phospho-L-lactate transferase; lactyl-2-diphospho-(5')guanosine:Fo 2-phospho-L-lactate transferase

Systematic name: (2S)-lactyl-2-diphospho-5'-guanosine:7,8-didemethyl-8-hydroxy-5-deazariboflavin 2-phospho-L-lactate transferase

Comments: This enzyme is involved in the biosynthesis of factor 420, a redox-active cofactor, in methanogenic archaea and certain bacteria. The specific reaction catalysed in vivo is determined by the availability of substrate, which in turn is determined by the enzyme present in the organism - EC, 2-phospho-L-lactate guanylyltransferase, EC, phosphoenolpyruvate guanylyltransferase, or EC, 3-phospho-D-glycerate guanylyltransferase.

Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number:


1. Graupner, M., Xu, H. and White, R.H. Characterization of the 2-phospho-L-lactate transferase enzyme involved in coenzyme F420 biosynthesis in Methanococcus jannaschii. Biochemistry 41 (2002) 3754-3761. [PMID: 11888293]

2. Forouhar, F., Abashidze, M., Xu, H., Grochowski, L.L., Seetharaman, J., Hussain, M., Kuzin, A., Chen, Y., Zhou, W., Xiao, R., Acton, T.B., Montelione, G.T., Galinier, A., White, R.H. and Tong, L. Molecular insights into the biosynthesis of the F420 coenzyme. J. Biol. Chem. 283 (2008) 11832-11840. [PMID: 18252724]

3. Braga, D., Last, D., Hasan, M., Guo, H., Leichnitz, D., Uzum, Z., Richter, I., Schalk, F., Beemelmanns, C., Hertweck, C. and Lackner, G. Metabolic pathway rerouting in Paraburkholderia rhizoxinica evolved long-overlooked derivatives of coenzyme F420. ACS Chem. Biol. 14 (2019) 2088-2094. [PMID: 31469543]

[EC created 2010, modified 2020]

Return to EC 2.7.8 home page
Return to EC 2.7 home page
Return to EC 2 home page
Return to Enzymes home page
Return to IUBMB Biochemical Nomenclature home page