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Kallifidas D, Dhakal D, Chen M, Chen QY, Kokkaliari S, Colon Rosa NA, Ratnayake R, Bruner SD, Paul VJ, Ding Y, Luesch H. Biosynthesis of Dolastatin 10 in Marine Cyanobacteria, a Prototype for Multiple Approved Cancer Drugs. Org Lett 2024; 26:1321-1325. [PMID: 38330916 PMCID: PMC10915760 DOI: 10.1021/acs.orglett.3c04083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
Dolastatin 10, a potent tubulin-targeting marine anticancer natural product, provided the basis for the development of six FDA-approved antibody-drug conjugates. Through the screening of cyanobacterial Caldora penicillata environmental DNA libraries and metagenome sequencing, we identified its biosynthetic gene cluster. Functional prediction of 10 enzymes encoded in the 39 kb cluster supports the dolastatin 10 biosynthesis. The nonheme diiron monooxygenase DolJ was biochemically characterized to mediate the terminal thiazole formation in dolastatin 10.
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Affiliation(s)
- Dimitris Kallifidas
- Department of Medicinal Chemistry and Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, FL 32610, United States
| | - Dipesh Dhakal
- Department of Medicinal Chemistry and Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, FL 32610, United States
| | - Manyun Chen
- Department of Medicinal Chemistry and Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, FL 32610, United States
| | - Qi-Yin Chen
- Department of Medicinal Chemistry and Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, FL 32610, United States
| | - Sofia Kokkaliari
- Department of Medicinal Chemistry and Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, FL 32610, United States
| | - Nicole A. Colon Rosa
- Department of Chemistry, University of Florida, Gainesville, FL 32611, United States
| | - Ranjala Ratnayake
- Department of Medicinal Chemistry and Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, FL 32610, United States
| | - Steven D. Bruner
- Department of Chemistry, University of Florida, Gainesville, FL 32611, United States
| | - Valerie J. Paul
- Smithsonian Marine Station, Fort Pierce, FL 34949, United States
| | - Yousong Ding
- Department of Medicinal Chemistry and Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, FL 32610, United States
| | - Hendrik Luesch
- Department of Medicinal Chemistry and Center for Natural Products, Drug Discovery and Development (CNPD3), University of Florida, Gainesville, FL 32610, United States
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Liu C, Powell MM, Rao G, Britt RD, Rittle J. Bioinformatic Discovery of a Cambialistic Monooxygenase. J Am Chem Soc 2024; 146:1783-1788. [PMID: 38198693 PMCID: PMC10811679 DOI: 10.1021/jacs.3c12131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 01/05/2024] [Accepted: 01/08/2024] [Indexed: 01/12/2024]
Abstract
Dinuclear monooxygenases mediate challenging C-H bond oxidation reactions throughout nature. Many of these enzymes are presumed to exclusively utilize diiron cofactors. Herein we report the bioinformatic discovery of an orphan dinuclear monooxygenase that preferentially utilizes a heterobimetallic manganese-iron (Mn/Fe) cofactor to mediate an O2-dependent C-H bond hydroxylation reaction. Unlike the structurally similar Mn/Fe-dependent monooxygenase AibH2, the diiron form of this enzyme (SfbO) exhibits a nascent enzymatic activity. This behavior raises the possibility that many other dinuclear monooxygenases may be endowed with the capacity to harness cofactors with a variable metal content.
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Affiliation(s)
- Chang Liu
- Department
of Chemistry, University of California,
Berkeley, Berkeley, California 94720, United States
| | - Magan M. Powell
- Department
of Chemistry, University of California,
Berkeley, Berkeley, California 94720, United States
| | - Guodong Rao
- Department
of Chemistry, University of California,
Davis, Davis, California 95616, United States
| | - R. David Britt
- Department
of Chemistry, University of California,
Davis, Davis, California 95616, United States
| | - Jonathan Rittle
- Department
of Chemistry, University of California,
Berkeley, Berkeley, California 94720, United States
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