The Enzyme Database

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EC 2.3.1.235     
Accepted name: tetracenomycin F2 synthase
Reaction: 10 malonyl-CoA = tetracenomycin F2 + 10 CoA + 10 CO2 + 2 H2O
For diagram of polyketides biosynthesis, click here
Glossary: tetracenomycin F2 = 4-(3-acetyl-4,5,7,10-tetrahydroxyanthracen-2-yl)-3-oxobutanoic acid
Other name(s): TCM PKS
Systematic name: malonyl-CoA:acetate malonyltransferase (tetracenomycin-F2-forming)
Comments: A multi-domain polyketide synthase involved in the synthesis of tetracenomycin in the bacterium Streptomyces glaucescens. It involves a ketosynthase complex (TcmKL), an acyl carrier protein (TcmM), a malonyl CoA:ACP acyltransferase (MAT), and a cyclase (TcmN). A malonyl-CoA molecule is initially bound to the acyl carrier protein and decarboxylated to form an acetyl starter unit. Additional two-carbon units are added from nine more malonyl-CoA molecules.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
References:
1.  Bao, W., Wendt-Pienkowski, E. and Hutchinson, C.R. Reconstitution of the iterative type II polyketide synthase for tetracenomycin F2 biosynthesis. Biochemistry 37 (1998) 8132–8138. [DOI] [PMID: 9609708]
[EC 2.3.1.235 created 2014]
 
 
EC 4.2.1.154     
Accepted name: tetracenomycin F2 cyclase
Reaction: tetracenomycin F2 = tetracenomycin F1 + H2O
For diagram of tetracenomycin biosynthesis, click here
Glossary: tetracenomycin F1 = 3,8,10,12-tetrahydroxy-1-methyl-11-oxo-6,11-dihydro-2-tetracenecarboxylate = 6,11-dihydro-3,8,10,12-tetrahydroxy-1-methyl-11-oxonaphthacene-2-carboxylate
tetracenomycin F2 = (3E)-4-(3-acetyl-4,5,7-trihydroxy-10-oxo-9,10-dihydroanthracen-2-yl)-3-hydroxybut-3-enoate
Other name(s): tcmI (gene name)
Systematic name: tetracenomycin F2 hydro-lyase (tetracenomycin-F1-forming)
Comments: The enzyme is involved in biosynthesis of the anthracycline antibiotic tetracenomycin C by the bacterium Streptomyces glaucescens.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
References:
1.  Shen, B. and Hutchinson, C.R. Tetracenomycin F2 cyclase: intramolecular aldol condensation in the biosynthesis of tetracenomycin C in Streptomyces glaucescens. Biochemistry 32 (1993) 11149–11154. [PMID: 8218177]
2.  Thompson, T.B., Katayama, K., Watanabe, K., Hutchinson, C.R. and Rayment, I. Structural and functional analysis of tetracenomycin F2 cyclase from Streptomyces glaucescens. A type II polyketide cyclase. J. Biol. Chem. 279 (2004) 37956–37963. [DOI] [PMID: 15231835]
[EC 4.2.1.154 created 2014]
 
 


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