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Mol. Cells 2009; 27(5): 601-608

Published online May 31, 2009

https://doi.org/10.1007/s10059-009-0080-5

© The Korean Society for Molecular and Cellular Biology

Heterologous Production of Paromamine in Streptomyces lividans TK24 Using Kanamycin Biosynthetic Genes from Streptomyces kanamyceticus ATCC12853

Keshav Kumar Nepal, Tae-Jin Oh, and Jae Kyung Sohng

Received: February 23, 2009; Revised: March 26, 2009; Accepted: March 30, 2009

Abstract

The 2-deoxystreptamine and paromamine are two key intermediates in kanamycin biosynthesis. In the present study, pSK-2 and pSK-7 recombinant plasmids were constructed with two combinations of genes: kanABK, and kanABKF and kacA respectively from kanamycin producer Streptomyces kanamyceticus ATCC12853. These plasmids were heterologously expressed into Streptomyces lividans TK24 independently and generated two recombinant strains named S. lividans SK-2/SL and S. lividans SK-7/SL, respectively. ESI/ MS and ESI-LC/MS analysis of the metabolite from S. lividans SK-2/SL showed that the compound had a molecular mass of 163 [M + H]+, which corresponds to that of 2-deoxystreptamine. ESI/MS and MS/MS analysis of me-tabolites from S. lividans SK-7/SL demonstrated the production of paromamine with a molecular mass of 324 [M + H]+. In this study, we report the production of paromamine in a heterologous host for the first time. This study will evoke to explore complete biosynthetic pathways of kanamycin and related aminoglycoside antibiotics.

Keywords aminoglycosides, heterologous expression, kanamycin, paromamine, Streptomyces kanamyceticus

Article

Research Article

Mol. Cells 2009; 27(5): 601-608

Published online May 31, 2009 https://doi.org/10.1007/s10059-009-0080-5

Copyright © The Korean Society for Molecular and Cellular Biology.

Heterologous Production of Paromamine in Streptomyces lividans TK24 Using Kanamycin Biosynthetic Genes from Streptomyces kanamyceticus ATCC12853

Keshav Kumar Nepal, Tae-Jin Oh, and Jae Kyung Sohng

Received: February 23, 2009; Revised: March 26, 2009; Accepted: March 30, 2009

Abstract

The 2-deoxystreptamine and paromamine are two key intermediates in kanamycin biosynthesis. In the present study, pSK-2 and pSK-7 recombinant plasmids were constructed with two combinations of genes: kanABK, and kanABKF and kacA respectively from kanamycin producer Streptomyces kanamyceticus ATCC12853. These plasmids were heterologously expressed into Streptomyces lividans TK24 independently and generated two recombinant strains named S. lividans SK-2/SL and S. lividans SK-7/SL, respectively. ESI/ MS and ESI-LC/MS analysis of the metabolite from S. lividans SK-2/SL showed that the compound had a molecular mass of 163 [M + H]+, which corresponds to that of 2-deoxystreptamine. ESI/MS and MS/MS analysis of me-tabolites from S. lividans SK-7/SL demonstrated the production of paromamine with a molecular mass of 324 [M + H]+. In this study, we report the production of paromamine in a heterologous host for the first time. This study will evoke to explore complete biosynthetic pathways of kanamycin and related aminoglycoside antibiotics.

Keywords: aminoglycosides, heterologous expression, kanamycin, paromamine, Streptomyces kanamyceticus

Mol. Cells
Sep 30, 2022 Vol.45 No.9, pp. 603~672
COVER PICTURE
The Target of Rapamycin Complex (TORC) is a central regulatory hub in eukaryotes, which is well conserved in diverse plant species, including tomato (Solanum lycopersicum). Inhibition of TORC genes (SlTOR, SlLST8, and SlRAPTOR) by VIGS (virus-induced gene silencing) results in early fruit ripening in tomato. The red/ orange tomatoes are early-ripened TORC-silenced fruits, while the green tomato is a control fruit. Top, left, control fruit (TRV2-myc); top, right, TRV2-SlLST8; bottom, left, TRV2-SlTOR; bottom, right, TRV2-SlRAPTOR(Choi et al., pp. 660-672).

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