IUBMB Enzyme Nomenclature

EC 2.5.1.136

Accepted name: 2-acylphloroglucinol 4-prenyltransferase

Reaction: dimethylallyl diphosphate + a 2-acylphloroglucinol = diphosphate + a 2-acyl-4-prenylphloroglucinol

For diagram of reaction click here or click here.

Glossary: naringenin chalcone = 2',4,4',6'-tetrahydroxychalcone = 3-(4-hydroxyphemyl)-1-(2,4,6-trihydroxyphenyl)prop-2-en-1-one
phlorisovalerophenone = 3-methyl-1-(2,4,6-trihydroxyphenyl)butan-1-one

Other name(s): PT-1 (gene name); PT1L (gene name); aromatic prenyltransferase (ambiguous)

Systematic name: dimethylallyl-diphosphate:2-acylphloroglucinol 4-dimethylallyltransferase

Comments: The enzyme, characterized from hop (Humulus lupulus), acts on phlorisovalerophenone, phlormethylbutanophenone, and phlorisobutanophenone during the synthesis of bitter acids. It also acts with much lower activity on naringenin chalcone. Forms a complex with EC 2.5.1.137, 2-acyl-4-prenylphloroglucinol 6-prenyltransferase, which catalyses additional prenylation reactions. Requires Mg2+.

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

References:

1. Tsurumaru, Y., Sasaki, K., Miyawaki, T., Uto, Y., Momma, T., Umemoto, N., Momose, M. and Yazaki, K. HlPT-1, a membrane-bound prenyltransferase responsible for the biosynthesis of bitter acids in hops. Biochem. Biophys. Res. Commun. 417 (2012) 393-398. [PMID: 22166201]

2. Li, H., Ban, Z., Qin, H., Ma, L., King, A.J. and Wang, G. A heteromeric membrane-bound prenyltransferase complex from hop catalyzes three sequential aromatic prenylations in the bitter acid pathway. Plant Physiol. 167 (2015) 650-659. [PMID: 25564559]

[EC 2.5.1.136 created 2017]


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