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Castillo UF, Strobel GA, Ford EJ, Hess WM, Porter H, Jensen JB, Albert H, Robison R, Condron MAM, Teplow DB, Stevens D, Yaver D. Munumbicins, wide-spectrum antibiotics produced by Streptomyces NRRL 30562, endophytic on Kennedia nigriscans. MICROBIOLOGY (READING, ENGLAND) 2002; 148:2675-2685. [PMID: 12213914 DOI: 10.1099/00221287-148-9-2675] [Citation(s) in RCA: 258] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Munumbicins A, B, C and D are newly described antibiotics with a wide spectrum of activity against many human as well as plant pathogenic fungi and bacteria, and a Plasmodium sp. These compounds were obtained from Streptomyces NRRL 3052, which is endophytic in the medicinal plant snakevine (Kennedia nigriscans), native to the Northern Territory of Australia. This endophyte was cultured, the broth was extracted with an organic solvent and the contents of the residue were purified by bioassay-guided HPLC. The major components were four functionalized peptides with masses of 1269.6, 1298.5, 1312.5 and 1326.5 Da. Numerous other related compounds possessing bioactivity, with differing masses, were also present in the culture broth extract in lower quantities. With few exceptions, the peptide portion of each component contained only the common amino acids threonine, aspartic acid (or asparagine), glutamic acid (or glutamine), valine and proline, in varying ratios. The munumbicins possessed widely differing biological activities depending upon the target organism. For instance, munumbicin B had an MIC of 2.5 microg x ml(-1) against a methicillin-resistant strain of Staphylococcus aureus, whereas munumbicin A was not active against this organism. In general, the munumbicins demonstrated activity against Gram-positive bacteria such as Bacillus anthracis and multidrug-resistant Mycobacterium tuberculosis. However, the most impressive biological activity of any of the munumbicins was that of munumbicin D against the malarial parasite Plasmodium falciparum, having an IC(50) of 4.5+/-0.07 ng x ml(-1). This report also describes the potential of the munumbicins in medicine and agriculture.
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Affiliation(s)
| | - Gary A Strobel
- Dept of Plant Sciences, Montana State University, Bozeman, MT 59717, USA1
| | - Eugene J Ford
- Dept of Plant Sciences, Montana State University, Bozeman, MT 59717, USA1
| | - Wilford M Hess
- Dept of Botany and Range Sciences2 and Dept of Microbiology3, Brigham Young University, Provo, UT 84602, USA
| | - Heidi Porter
- Dept of Botany and Range Sciences2 and Dept of Microbiology3, Brigham Young University, Provo, UT 84602, USA
| | - James B Jensen
- Dept of Botany and Range Sciences2 and Dept of Microbiology3, Brigham Young University, Provo, UT 84602, USA
| | - Heather Albert
- Dept of Botany and Range Sciences2 and Dept of Microbiology3, Brigham Young University, Provo, UT 84602, USA
| | - Richard Robison
- Dept of Botany and Range Sciences2 and Dept of Microbiology3, Brigham Young University, Provo, UT 84602, USA
| | - Margret A M Condron
- Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA4
| | - David B Teplow
- Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA4
| | - Dennis Stevens
- Infectious Diseases Section, Veterans Affairs Medical Center, 500 West Fort St, Boise, ID 83702 and Dept of Medicine, University of Washington School of Medicine, Seattle, WA 98195, USA5
| | - Debbie Yaver
- Novozymes Biotech Inc., 1445 Drew Ave, Davis, CA 95616, USA6
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Nielsen TH, Thrane C, Christophersen C, Anthoni U, Sørensen J. Structure, production characteristics and fungal antagonism of tensin - a new antifungal cyclic lipopeptide from Pseudomonas fluorescens strain 96.578. J Appl Microbiol 2000; 89:992-1001. [PMID: 11123472 DOI: 10.1046/j.1365-2672.2000.01201.x] [Citation(s) in RCA: 125] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIM To study the antagonistic activity by Pseudomonas fluorescens strain 96.578 on the plant pathogenic fungus Rhizoctonia solani. METHODS AND RESULTS Strain 96.578 produced a new cyclic lipopeptide, tensin. High tensin production per cell was detected in liquid media with glucose, mannitol or glutamate as growth substrate while fructose, sucrose and asparagine supported low production. Tensin production was nearly constant in media with different initial C levels, while low initial N contents reduced production. When applied to sugar beet seeds, strain 96.578 produced tensin during seed germination. When challenged with strain 96.578 or purified tensin, Rhizoctonia solani reduced radial mycelium extension but increased branching and rosette formation. CONCLUSION The antagonistic activity of strain 96.578 towards Rhizoctonia solani was caused by tensin. SIGNIFICANCE AND IMPACT OF THE STUDY When coated onto sugar beet seeds, tensin production by strain 96.578 could be of significant importance for inhibition of mycelial growth and seed infection by Rhizoctonia solani.
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Affiliation(s)
- T H Nielsen
- Section of Genetics and Microbiology, Department of Ecology, The Royal Veterinary and Agricultural University, Copenhagen, Denmark.
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Strobel G, Li JY, Sugawara F, Koshino H, Harper J, Hess WM. Oocydin A, a chlorinated macrocyclic lactone with potent anti-oomycete activity from Serratia marcescens. MICROBIOLOGY (READING, ENGLAND) 1999; 145 ( Pt 12):3557-3564. [PMID: 10627053 DOI: 10.1099/00221287-145-12-3557] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A unique chlorinated macrocyclic lactone, termed oocydin A, was isolated from a strain of Serratia marcescens growing as an epiphyte on Rhyncholacis pedicillata, an aquatic plant native to the Carrao river of the Venezuelan-Guyanan region of South America. The lactone has a molecular mass of 470 Da, and contains one atom of chlorine, a carboxyl group and a tetrahydrofuran ring internal to a larger macrocyclic ring. MICs of approximately 0.03 microg ml(-1) were noted for oocydin A against such phytopathogenic oomycetes as Pythium ultimum, Phytophthora parasitica, Phytophthora cinnamomi and Phytophthora citrophora. With regard to the true fungi, oocydin A had either minimal or no effect against certain Fungi Imperfecti (including several pathogens of humans), two ascomycetes and a basidiomycete. Oocydin A may have potential as an antimycotic in agricultural applications and especially for crop protection.
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Affiliation(s)
- Gary Strobel
- Department of Plant Sciences, Montana State University, Bozeman, MT 59717, USA1
| | - Jia-Yao Li
- Department of Plant Sciences, Montana State University, Bozeman, MT 59717, USA1
| | - Fumio Sugawara
- Department of Applied Biological Science, Science University of Tokyo, Noda, Chiba 278-8510, Japan2
| | - Hiroyuki Koshino
- The Institute of Physical and Chemical Research, Wako, Saitama 351- 0198, Tokyo, Japan3
| | - James Harper
- Department of Chemistry, University of Utah, Salt Lake City, UT 84112, USA4
| | - W M Hess
- Department of Botany and Range Science, Brigham Young University, Provo, UT 84602, USA5
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