Urdamycin A
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| Category | Antibiotics |
| Catalog number | BBF-01891 |
| CAS | 98474-21-6 |
| Molecular Weight | 844.91 |
| Molecular Formula | C43H56O17 |
| Purity | >97% |
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Description
It is produced by the strain of Str. Violaceolatus, Kerriamycin B has anti-gram-positive bacterial effect and can also prolong the survival time of patients with Ai's ascites cancer.
Specification
| Synonyms | Kerriamycin B; (1R)-1,5-anhydro-2,6-dideoxy-3-O-{(2S,5S,6S)-5-[(2,6-dideoxy-beta-D-arabino-hexopyranosyl)oxy]-6-methyltetrahydro-2H-pyran-2-yl}-1-[(3R,4aR,12bS)-3,4a,8-trihydroxy-12b-{[(2S,5S,6S)-5-hydroxy-6-methyltetrahydro-2H-pyran-2-yl]oxy}-3-methyl-1,7,12-trioxo-1,2,3,4,4a,7,12,12b-octahydrobenzo[a]anthracen-9-yl]-D-arabino-hexitol |
| Storage | Store at -20°C |
| IUPAC Name | (3R,4aR,12bS)-9-[(2R,4R,5R,6R)-4-[(2S,5S,6S)-5-[(2S,4R,5S,6R)-4,5-dihydroxy-6-methyloxan-2-yl]oxy-6-methyloxan-2-yl]oxy-5-hydroxy-6-methyloxan-2-yl]-3,4a,8-trihydroxy-12b-[(2S,5S,6S)-5-hydroxy-6-methyloxan-2-yl]oxy-3-methyl-2,4-dihydrobenzo[a]anthracene-1,7,12-trione |
| Canonical SMILES | CC1C(CCC(O1)OC23C(=O)CC(CC2(C=CC4=C3C(=O)C5=C(C4=O)C(=C(C=C5)C6CC(C(C(O6)C)O)OC7CCC(C(O7)C)OC8CC(C(C(O8)C)O)O)O)O)(C)O)O |
| InChI | InChI=1S/C43H56O17/c1-18-25(44)8-10-32(55-18)60-43-30(46)16-41(5,52)17-42(43,53)13-12-24-35(43)40(51)23-7-6-22(38(49)34(23)39(24)50)28-15-29(37(48)21(4)54-28)59-31-11-9-27(19(2)56-31)58-33-14-26(45)36(47)20(3)57-33/h6-7,12-13,18-21,25-29,31-33,36-37,44-45,47-49,52-53H,8-11,14-17H2,1-5H3/t18-,19-,20+,21+,25-,26+,27-,28+,29+,31-,32-,33-,36+,37+,41-,42-,43-/m0/s1 |
| InChI Key | FJSYXNOFZQFOAN-FXPMUEKOSA-N |
Properties
| Appearance | Yellow Powder |
| Antibiotic Activity Spectrum | Gram-positive bacteria; neoplastics (Tumor) |
| Boiling Point | 1019.2°C at 760 mmHg |
| Melting Point | 188-193°C |
| Density | 1.49 g/cm3 |
Reference Reading
1. The NDP-sugar co-substrate concentration and the enzyme expression level influence the substrate specificity of glycosyltransferases: cloning and characterization of deoxysugar biosynthetic genes of the urdamycin biosynthetic gene cluster
C Fischer, E Künzel, D Hoffmeister, S Domann, B Faust, G Dräger, A Kirschning, D Bearden, A Trefzer, K Ichinose, A Bechthold, J Rohr Chem Biol . 2000 Nov;7(11):821-31. doi: 10.1016/s1074-5521(00)00029-6.
Background:Streptomyces fradiae is the principal producer of urdamycin A. The antibiotic consists of a polyketide-derived aglycone, which is glycosylated with four sugar components, 2x D-olivose (first and last sugar of a C-glycosidically bound trisaccharide chain at the 9-position), and 2x L-rhodinose (in the middle of the trisaccharide chain and at the 12b-position). Limited information is available about both the biosynthesis of D-olivose and L-rhodinose and the influence of the concentration of both sugars on urdamycin biosynthesis.Results:To further investigate urdamycin biosynthesis, a 5.4 kb section of the urdamycin biosynthetic gene cluster was sequenced. Five new open reading frames (ORFs) (urdZ3, urdQ, urdR, urdS, urdT) could be identified each one showing significant homology to deoxysugar biosynthetic genes. We inactivated four of these newly allocated ORFs (urdZ3, urdQ, urdR, urdS) as well as urdZ1, a previously found putative deoxysugar biosynthetic gene. Inactivation of urdZ3, urdQ and urdZ1 prevented the mutant strains from producing L-rhodinose resulting in the accumulation of mainly urdamycinone B. Inactivation of urdR led to the formation of the novel urdamycin M, which carries a C-glycosidically attached D-rhodinose at the 9-position. The novel urdamycins N and O were detected after overexpression of urdGT1c in two different chromosomal urdGT1c deletion mutants. The mutants lacking urdS and urdQ accumulated various known diketopiperazines.Conclusions:Analysis of deoxysugar biosynthetic genes of the urdamycin biosynthetic gene cluster revealed a widely common biosynthetic pathway leading to D-olivose and L-rhodinose. Several enzymes responsible for specific steps of this pathway could be assigned. The pathway had to be modified compared to earlier suggestions. Two glycosyltransferases normally involved in the C-glycosyltransfer of D-olivose at the 9-position (UrdGT2) and in conversion of 100-2 to urdamycin G (UrdGT1c) show relaxed substrate specificity for their activated deoxysugar co-substrate and their alcohol substrate, respectively. They can transfer activated D-rhodinose (instead of D-olivose) to the 9-position, and attach L-rhodinose to the 4A-position normally occupied by a D-olivose unit, respectively.
2. Expression of the landomycin biosynthetic gene cluster in a PKS mutant of Streptomyces fradiae is dependent on the coexpression of a putative transcriptional activator gene
Almuth Mayer, Andriy Luzhetskyy, Andreas Bechthold, Carsten Hofmann, Ursula von Mulert FEMS Microbiol Lett . 2004 Jan 15;230(1):91-7. doi: 10.1016/S0378-1097(03)00861-9.
The formation of landomycin A or one of its derivatives (5,6-anhydrolandomycin A) in a heterologous strain has never been achieved. It has now been made possible by the coexpression of a cosmid containing all biosynthetic genes necessary to produce landomycin A together with a pathway-specific regulatory gene. As host we used a polyketide synthase-defective mutant strain of Streptomyces fradiae Tü2717 which is not able to produce urdamycin A. Our results indicate that four glycosyltransferases are responsible for the formation of the hexasaccharide side chain of landomycin A.
3. Surprising production of a new urdamycin derivative by S. fradiae Delta urdQ/R
A Luzhetskyy, M Nur-e-Alam, M Fedoryshyn, A Bechthold, J Rohr, L Zhu J Biotechnol . 2007 May 31;130(1):32-8. doi: 10.1016/j.jbiotec.2007.02.018.
A strain (S. fradiae Delta urdQ/R) with mutations in urdQ and urdR encoding a dTDP-hexose-3,4-dehydratase and a dTDP-hexose-4-ketoreductase, respectively, produces a new urdamycin analogue (urdamycin X) with changes in the polyketide structure. The structure of urdamycin X has been elucidated by NMR spectroscopy. Urdamycin X was not detectable, even in small amounts, in either S. fradiae Delta urdQ, in S. fradiae DeltaurdR or in S. fradiae A0, a mutant lacking all glycosyltransferase genes. Complementation of S. fradiae Delta urdQ/R restored urdamycin A production indicating that the mutations did not cause any polar effect.
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Bio Calculators
* Our calculator is based on the following equation:
Concentration (start) x Volume (start) = Concentration (final) x Volume (final)
It is commonly abbreviated as: C1V1 = C2V2
* Total Molecular Weight:
g/mol
Tip: Chemical formula is case sensitive. C22H30N4O √ c22h30n40 ╳
