five mM ATP, 10 mM L-threonine, 40 mM XimA and various concentrations of xiamenmycin B ranging from 0.two mM to 345 mM. The reaction products were detected by Ultra Overall performance Liquid Chromatography along with a Triple Quadrupole Mass Spectrometer. Gene replacement of ximB. Gene replacement of ximC. Gene replacement of ximD. Gene replacement of ximE. Primers made use of for construction and confirmation of mutants and for protein expression. 1 H NMR data of compound three. C NMR data of compound three. 13 Supporting Facts 1 H NMR spectrum of xiamenmycin B. H- H COSY spectrum of xiamenmycin B. C NMR spectrum of xiamenmycin B. 1 Acknowledgments We’re grateful to Professor I-BRD9 Shuangjun Lin to get a essential reading on the manuscript, Dr. Fei Su and Dr. Ying He for giving computer-assisted sequence analysis, and Xiaoling Li and Zhongyuan You for providing xiamenmycin. We thank Lei Feng, Li Zhang, and Wenjuan Yu for the UPLC-3Q-MS, UPLC-Q-TOF-MS and GC-MS evaluation, Dr. Fei Xu for outstanding technical help and beneficial suggestions. 1 13 Author Contributions Conceived and made the experiments: YY JX MX. Performed the experiments: YY LF JZ LH. Analyzed the information: YY JX MX. Wrote the paper: YY JX MX References 1. Kuzuyama T, Seto H Diversity from the biosynthesis of your isoprene units. Nat Prod Rep 20: 171183. two. Macone A, 17460038 Lendaro E, Comandini A, Rovardi I, Matarese RM, et al. Chromane derivatives of little aromatic molecules: Chemoenzymatic synthesis 
and growth inhibitory activity on human tumor cell line LoVo WT. Bioorg Med Chem 17: 60036007. three. Kawamura Naoto TE, PHCCC chemical information Watanabe Y, Tsuchihashi K, Takako T Benzopyran derivatives, their manufacture with Streptomyces species, and their use for treatment of asthma and rheumatoid arthritis Jpn Kokai Tokkyo Koho, JP 2000072766 A 20000307. four. Xu MJ, Liu XJ, Zhao YL, Liu D, Xu ZH, et al. Identification and characterization of an anti-fibrotic benzopyran compound isolated from mangrove-derived Streptomyces xiamenensis. Mar Drugs ten: 639654. 5. Xu J, Wang Y, Xie SJ, Xiao J, Ruan JS Streptomyces xiamenensis sp. nov., isolated from mangrove sediment. Int J Syst Evol Microbiol 59: 472476. 6. Lawrence J, Cox GB, Gibson F Biosynthesis of ubiquinone in Escherichia coli K-12: biochemical and genetic characterization of a mutant unable to convert chorismate into 4-hydroxybenzoate. J Bacteriol 118: 4145. 7. Nichols BP, Green JM Cloning and sequencing of Escherichia coli ubiC and purification of chorismate lyase. J Bacteriol 174: 53095316. eight. Siebert M, Bechthold A, Melzer M, May U, Berger U, et al. Ubiquinone biosynthesis. Cloning in the genes coding for chorismate pyruvate-lyase and 4- 9 Xiamenmycin Biosynthesis Gene Cluster 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. hydroxybenzoate octaprenyl transferase from Escherichia coli. FEBS Lett 307: 347350. Siebert M, Severin K, Heide L Formation of 4-hydroxybenzoate in Escherichia coli: characterization in the ubiC gene and its encoded enzyme chorismate pyruvate-lyase. Microbiology 140: 897904. Holden MJ, Mayhew MP, Gallagher DT, Vilker VL Chorismate lyase: kinetics and engineering for stability. Biochim Biophys Acta 1594: 160167. Wu G, Williams HD, Gibson F, Poole RK Mutants of Escherichia coli impacted in respiration: the cloning and nucleotide sequence of ubiA, encoding the membrane-bound p-hydroxybenzoate: octaprenyltransferase. J Gen Microbiol 139: 17951805. Chen Y, Wendt-Pienkowski E, Ju J, Lin S, Rajski SR, et al. Characterization of FdmV as an amide synthetase 16574785 for fredericamycin.five mM ATP, 10 mM L-threonine, 40 mM XimA and many concentrations of xiamenmycin B ranging from 0.two mM to 345 mM. The reaction items were detected by Ultra Functionality Liquid Chromatography as well as a Triple Quadrupole Mass Spectrometer. Gene replacement of ximB. Gene replacement of ximC. Gene replacement of ximD. Gene replacement of ximE. Primers utilized for 
construction and confirmation of mutants and for protein expression. 1 H NMR data of compound 3. C NMR data of compound 3. 13 Supporting Information and facts 1 H NMR spectrum of xiamenmycin B. H- H COSY spectrum of xiamenmycin B. C NMR spectrum of xiamenmycin B. 1 Acknowledgments We’re grateful to Professor Shuangjun Lin to get a vital reading with the manuscript, Dr. Fei Su and Dr. Ying He for supplying computer-assisted sequence evaluation, and Xiaoling Li and Zhongyuan You for supplying xiamenmycin. We thank Lei Feng, Li Zhang, and Wenjuan Yu for the UPLC-3Q-MS, UPLC-Q-TOF-MS and GC-MS evaluation, Dr. Fei Xu for excellent technical assistance and helpful suggestions. 1 13 Author Contributions Conceived and made the experiments: YY JX MX. Performed the experiments: YY LF JZ LH. Analyzed the data: YY JX MX. Wrote the paper: YY JX MX References 1. Kuzuyama T, Seto H Diversity from the biosynthesis with the isoprene units. Nat Prod Rep 20: 171183. 2. Macone A, 17460038 Lendaro E, Comandini A, Rovardi I, Matarese RM, et al. Chromane derivatives of modest aromatic molecules: Chemoenzymatic synthesis and development inhibitory activity on human tumor cell line LoVo WT. Bioorg Med Chem 17: 60036007. three. Kawamura Naoto TE, Watanabe Y, Tsuchihashi K, Takako T Benzopyran derivatives, their manufacture with Streptomyces species, and their use for remedy of asthma and rheumatoid arthritis Jpn Kokai Tokkyo Koho, JP 2000072766 A 20000307. 4. Xu MJ, Liu XJ, Zhao YL, Liu D, Xu ZH, et al. Identification and characterization of an anti-fibrotic benzopyran compound isolated from mangrove-derived Streptomyces xiamenensis. Mar Drugs 10: 639654. five. Xu J, Wang Y, Xie SJ, Xiao J, Ruan JS Streptomyces xiamenensis sp. nov., isolated from mangrove sediment. Int J Syst Evol Microbiol 59: 472476. six. Lawrence J, Cox GB, Gibson F Biosynthesis of ubiquinone in Escherichia coli K-12: biochemical and genetic characterization of a mutant unable to convert chorismate into 4-hydroxybenzoate. J Bacteriol 118: 4145. 7. Nichols BP, Green JM Cloning and sequencing of Escherichia coli ubiC and purification of chorismate lyase. J Bacteriol 174: 53095316. eight. Siebert M, Bechthold A, Melzer M, Might U, Berger U, et al. Ubiquinone biosynthesis. Cloning of your genes coding for chorismate pyruvate-lyase and 4- 9 Xiamenmycin Biosynthesis Gene Cluster 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. hydroxybenzoate octaprenyl transferase from Escherichia coli. FEBS Lett 307: 347350. Siebert M, Severin K, Heide L Formation of 4-hydroxybenzoate in Escherichia coli: characterization with the ubiC gene and its encoded enzyme chorismate pyruvate-lyase. Microbiology 140: 897904. Holden MJ, Mayhew MP, Gallagher DT, Vilker VL Chorismate lyase: kinetics and engineering for stability. Biochim Biophys Acta 1594: 160167. Wu G, Williams HD, Gibson F, Poole RK Mutants of Escherichia coli affected in respiration: the cloning and nucleotide sequence of ubiA, encoding the membrane-bound p-hydroxybenzoate: octaprenyltransferase. J Gen Microbiol 139: 17951805. Chen Y, Wendt-Pienkowski E, Ju J, Lin S, Rajski SR, et al. Characterization of FdmV as an amide synthetase 16574785 for fredericamycin.
