Document Detail


Enediyne antitumor antibiotic maduropeptin biosynthesis featuring a C-methyltransferase that acts on a CoA-tethered aromatic substrate.
MedLine Citation:
PMID:  20718468     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The enediyne antitumor antibiotic maduropeptin (MDP) is produced by Actinomadura madurae ATCC 39144. The biosynthetic pathway for the 3,6-dimethylsalicylic acid moiety of the MDP chromophore is proposed to be comprised of four enzymes: MdpB, MdpB1, MdpB2, and MdpB3. Based on the previously characterized biosynthesis of the naphthoic acid moiety of neocarzinostatin (NCS), we expected a biosynthetic pathway featuring carboxylic acid activation by the MdpB2 CoA ligase immediately before its coupling to an enediyne core intermediate. Surprisingly, the MDP aromatic acid biosynthetic pathway employs an unusual logic in which MdpB2-catalyzed CoA activation occurs before MdpB1-catalyzed C-methylation, demonstrating that MdpB1 is apparently unique in its ability to C-methylate a CoA-tethered aromatic acid. MdpB2 is a promiscuous CoA ligase capable of activating a variety of salicylic acid analogues, a property that could be potentially exploited to engineer MDP analogues.
Authors:
Jianya Ling; Geoffrey P Horsman; Sheng-Xiong Huang; Yinggang Luo; Shuangjun Lin; Ben Shen
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the American Chemical Society     Volume:  132     ISSN:  1520-5126     ISO Abbreviation:  J. Am. Chem. Soc.     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-09-08     Completed Date:  2011-01-05     Revised Date:  2013-05-28    
Medline Journal Info:
Nlm Unique ID:  7503056     Medline TA:  J Am Chem Soc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  12534-6     Citation Subset:  IM    
Affiliation:
Division of Pharmaceutical Sciences, University of Wisconsin-Madison, Madison, Wisconsin 53705, USA.
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MeSH Terms
Descriptor/Qualifier:
Actinobacteria / enzymology,  metabolism
Biocatalysis
Coenzyme A Ligases / metabolism*
Enediynes / chemistry,  metabolism*
Methyltransferases / metabolism*
Molecular Structure
Stereoisomerism
Substrate Specificity
Grant Support
ID/Acronym/Agency:
CA113297/CA/NCI NIH HHS; CA78747/CA/NCI NIH HHS; R01 CA078747/CA/NCI NIH HHS; R01 CA078747-10/CA/NCI NIH HHS; R01 CA078747-10S1/CA/NCI NIH HHS; U19 CA113297/CA/NCI NIH HHS; U19 CA113297-05/CA/NCI NIH HHS; U19 CA113297-050001/CA/NCI NIH HHS
Chemical
Reg. No./Substance:
0/Enediynes; 0/maduropeptin enediyne; EC 2.1.1.-/Methyltransferases; EC 6.2.1.-/Coenzyme A Ligases
Comments/Corrections

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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