IUBMB Enzyme Nomenclature


Accepted name: 4-hydroxybenzoate geranyltransferase

Reaction: geranyl diphosphate + 4-hydroxybenzoate = 3-geranyl-4-hydroxybenzoate + diphosphate

Other name(s): PGT1; PGT2; 4HB geranyltransferase; 4HB:geranyltransferase; p-hydroxybenzoate geranyltransferase; PHB geranyltransferase; geranyl diphosphate:4-hydroxybenzoate geranyltransferase; p-hydroxybenzoate geranyltransferase

Systematic name: geranyl-diphosphate:4-hydroxybenzoate 3-geranyltransferase

Comments: The enzyme is involved in shikonin biosynthesis. It has a strict substrate specificity for geranyl diphosphate and an absolute requirement for Mg2+ [2].

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


1. Ohara, K., Muroya, A., Fukushima, N. and Yazaki, K. Functional characterization of LePGT1, a membrane-bound prenyltransferase involved in the geranylation of p-hydroxybenzoic acid. Biochem. J. 421 (2009) 231-241. [PMID: 19392660]

2. Muhlenweg, A., Melzer, M., Li, S.M. and Heide, L. 4-Hydroxybenzoate 3-geranyltransferase from Lithospermum erythrorhizon: purification of a plant membrane-bound prenyltransferase. Planta 205 (1998) 407-413. [PMID: 9640665]

3. Yazaki, K., Kunihisa, M., Fujisaki, T. and Sato, F. Geranyl diphosphate:4-hydroxybenzoate geranyltransferase from Lithospermum erythrorhizon. Cloning and characterization of a key enzyme in shikonin biosynthesis. J. Biol. Chem. 277 (2002) 6240-6246. [PMID: 11744717]

[EC created 2010]

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