Heptaibin
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| Category | Antibiotics |
| Catalog number | BBF-01339 |
| CAS | 291311-47-2 |
| Molecular Weight | 1559.84 |
| Molecular Formula | C76H118N16O19 |
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Description
It is produced by the strain of Emericellopsis sp. BAUA8289. It is a peptaibol antifungal antibiotic. It has the activity against gram-positive bacteria (MIC is 8 μg/mL) such as Staphylococcus aureus and fungi (MIC is 13-32 μg/mL) such as Aspergillus, Candida albicans and cryptococcus neofordii, and it has moderate anti-Rhabditella pseudoelongata activity (MIC is 50 μg/mL).
Specification
| IUPAC Name | (2S)-2-[[(2S,4R)-1-[2-[[2-[[(2S)-2-[[2-[[(2S)-2-[[2-[[2-[[2-[[(2S)-2-acetamido-3-phenylpropanoyl]amino]-2-methylpropanoyl]amino]-2-methylpropanoyl]amino]-2-methylpropanoyl]amino]-3-methylbutanoyl]amino]acetyl]amino]-4-methylpentanoyl]amino]-2-methylpropanoyl]amino]-2-methylpropanoyl]-4-hydroxypyrrolidine-2-carbonyl]amino]-N-[1-[(2S,4R)-4-hydroxy-2-[[1-[[(2S)-1-hydroxy-3-phenylpropan-2-yl]amino]-2-methyl-1-oxopropan-2-yl]carbamoyl]pyrrolidin-1-yl]-2-methyl-1-oxopropan-2-yl]pentanediamide |
| Canonical SMILES | CC(C)CC(C(=O)NC(C)(C)C(=O)NC(C)(C)C(=O)N1CC(CC1C(=O)NC(CCC(=O)N)C(=O)NC(C)(C)C(=O)N2CC(CC2C(=O)NC(C)(C)C(=O)NC(CC3=CC=CC=C3)CO)O)O)NC(=O)CNC(=O)C(C(C)C)NC(=O)C(C)(C)NC(=O)C(C)(C)NC(=O)C(C)(C)NC(=O)C(CC4=CC=CC=C4)NC(=O)C |
| InChI | InChI=1S/C76H118N16O19/c1-41(2)32-50(81-55(98)37-78-62(104)56(42(3)4)83-64(106)71(8,9)88-67(109)74(14,15)89-65(107)72(10,11)85-59(101)51(79-43(5)94)34-45-28-24-21-25-29-45)58(100)84-73(12,13)66(108)90-76(18,19)69(111)91-38-47(95)35-52(91)60(102)82-49(30-31-54(77)97)57(99)86-75(16,17)68(110)92-39-48(96)36-53(92)61(103)87-70(6,7)63(105)80-46(40-93)33-44-26-22-20-23-27-44/h20-29,41-42,46-53,56,93,95-96H,30-40H2,1-19H3,(H2,77,97)(H,78,104)(H,79,94)(H,80,105)(H,81,98)(H,82,102)(H,83,106)(H,84,100)(H,85,101)(H,86,99)(H,87,103)(H,88,109)(H,89,107)(H,90,108)/t46-,47+,48+,49-,50-,51-,52-,53-,56-/m0/s1 |
| InChI Key | OESVNVWXOTVKHT-ZAEOGNKKSA-N |
Properties
| Appearance | Crystal |
| Antibiotic Activity Spectrum | Gram-positive bacteria; Fungi; Parasites |
Reference Reading
1. Synthesis, preferred conformation, protease stability, and membrane activity of heptaibin, a medium-length peptaibiotic
Marta De Zotti, Barbara Biondi, Cristina Peggion, Yoonkyung Park, Kyung-Soo Hahm, Fernando Formaggio, Claudio Toniolo J Pept Sci. 2011 Aug;17(8):585-94. doi: 10.1002/psc.1364. Epub 2011 Apr 14.
The medium-length peptaibiotics are characterized by a primary structure of 14-16 amino acid residues. Despite the interesting antibiotic and antifungal properties exhibited by these membrane-active peptides, their exact mechanism of action is still unknown. Here, we present our results on heptaibin, a 14-amino acid peptaibiotic found to exhibit antimicrobial activity against Staphylococcus aureus. We carried out the very challenging synthesis of heptaibin on solid phase and a detailed conformational analysis in solution. The peptaibiotic is folded in a mixed 3₁₀-/α-helix conformation which exhibits a remarkable amphiphilic character. We also find that it is highly stable toward degradation by proteolytic enzymes and nonhemolytic. Finally, fluorescence leakage experiments using small unilamellar vesicles of three different compositions revealed that heptaibin, although uncharged, is a selective compound for permeabilization of model membranes mimicking the overall negatively charged surface of Gram-positive bacteria. This latter finding is in agreement with the originally published antimicrobial activity data.
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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 ╳
