IUBMB Enzyme Nomenclature


Accepted name: 1,3,6,8-tetrahydroxynaphthalene synthase

Reaction: 5 malonyl-CoA = 1,3,6,8-tetrahydroxynaphthalene + 5 CoA + 5 CO2 + H2O

For diagram of reaction click here.

Other name(s): PKS1; THNS; SCO1206; RppA

Systematic name: malonyl-CoA C-acyl transferase (1,3,6,8-tetrahydroxynaphthalene forming)

Comments: Isolated from the fungus Colletotrichum lagenarium [1], and the bacteria Streptomyces coelicolor [2,3] and Streptomyces peucetius [4]. It only uses malonyl-CoA, without invovement of acetyl-CoA.

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


1. Fujii, I., Mori, Y., Watanabe, A., Kubo, Y., Tsuji, G. and Ebizuka, Y. Enzymatic synthesis of 1,3,6,8-tetrahydroxynaphthalene solely from malonyl coenzyme A by a fungal iterative type I polyketide synthase PKS1. Biochemistry 39 (2000) 8853-8858. [PMID: 10913297]

2. Izumikawa, M., Shipley, P.R., Hopke, J.N., O'Hare, T., Xiang, L., Noel, J.P. and Moore, B.S. Expression and characterization of the type III polyketide synthase 1,3,6,8-tetrahydroxynaphthalene synthase from Streptomyces coelicolor A3(2). J Ind Microbiol Biotechnol 30 (2003) 510-515. [PMID: 12905073]

3. Austin, M.B., Izumikawa, M., Bowman, M.E., Udwary, D.W., Ferrer, J.L., Moore, B.S. and Noel, J.P. Crystal structure of a bacterial type III polyketide synthase and enzymatic control of reactive polyketide intermediates. J. Biol. Chem. 279 (2004) 45162-45174. [PMID: 15265863]

4. Ghimire, G.P., Oh, T.J., Liou, K. and Sohng, J.K. Identification of a cryptic type III polyketide synthase (1,3,6,8-tetrahydroxynaphthalene synthase) from Streptomyces peucetius ATCC 27952. Mol. Cells 26 (2008) 362-367. [PMID: 18612244]

[EC created 2014]

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