Neuroprotectin B
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| Category | Others |
| Catalog number | BBF-02123 |
| CAS | |
| Molecular Weight | 1360.76 |
| Molecular Formula | C61H45Cl6N7O17 |
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Description
Neuroprotectin B is a cyclopeptide produced by the strain of Streptomyces sp. Q27107. It has the function of protecting chicken brain neuron culture from excitatory toxicity induced by glutamate and red alginate.
Specification
| Synonyms | Complestatin B |
| IUPAC Name | (2R)-2-[[(17R,20R,23R,26R,29S)-20,26-bis(3,5-dichloro-4-hydroxyphenyl)-17-[[2-(3,5-dichloro-4-hydroxyphenyl)-2-oxoacetyl]amino]-15,37-dihydroxy-28-methyl-14,18,21,24,27-pentaoxo-2-oxa-13,19,22,25,28-pentazahexacyclo[29.2.2.13,7.18,12.05,23.011,15]heptatriaconta-1(33),3,5,7(37),8(36),9,11,31,34-nonaene-29-carbonyl]amino]-2-(4-hydroxyphenyl)acetic acid |
| Canonical SMILES | CN1C(CC2=CC=C(C=C2)OC3=CC4=CC(=C3O)C5=CC6=C(C=C5)C(CC(C(=O)NC(C(=O)NC4C(=O)NC(C1=O)C7=CC(=C(C(=C7)Cl)O)Cl)C8=CC(=C(C(=C8)Cl)O)Cl)NC(=O)C(=O)C9=CC(=C(C(=C9)Cl)O)Cl)(C(=O)N6)O)C(=O)NC(C1=CC=C(C=C1)O)C(=O)O |
| InChI | InChI=1S/C61H45Cl6N7O17/c1-74-42(54(82)73-47(59(87)88)24-4-7-30(75)8-5-24)12-23-2-9-31(10-3-23)91-43-21-26-13-32(49(43)77)25-6-11-33-40(20-25)69-60(89)61(33,90)22-41(68-57(85)48(76)29-18-38(66)52(80)39(67)19-29)53(81)70-45(27-14-34(62)50(78)35(63)15-27)55(83)71-44(26)56(84)72-46(58(74)86)28-16-36(64)51(79)37(65)17-28/h2-11,13-21,41-42,44-47,75,77-80,90H,12,22H2,1H3,(H,68,85)(H,69,89)(H,70,81)(H,71,83)(H,72,84)(H,73,82)(H,87,88)/t41-,42+,44-,45-,46-,47-,61?/m1/s1 |
| InChI Key | NGSUYOQYYVLKJJ-NAZRFLCCSA-N |
Properties
| Appearance | Brownish Yellow Solid |
| Melting Point | >300°C |
Reference Reading
1. Neuroprotectins A and B, bicyclohexapeptides protecting chick telencephalic neuronal cells from excitotoxicity. I. Fermentation, isolation, physico-chemical properties and biological activity
H Kobayashi, K Shin-Ya, K Nagai, K Suzuki, Y Hayakawa, H Seto, B S Yun, I J Ryoo, J S Kim, C J Kim, I D Yoo J Antibiot (Tokyo). 2001 Dec;54(12):1013-8. doi: 10.7164/antibiotics.54.1013.
Glutamate, an excitatory amino acid, is known to induce neurotoxicity in central nervous system under abnormal conditions such as ischemia, hypoglycemia, epilepsy, Huntington's chorea, Parkinson's disease and Alzheimer's disease. In our search for neuroprotective agents of microbial origin against excitatory neurotoxins, we have isolated two new bicyclohexapeptides, neuroprotectins A and B, together with a known compound complestatin, from the fermentation broth of Streptomyces sp. Q27107. Neuroprotectins protected primary cultured chick telencephalic neurons from glutamate- and kainate-induced excitotoxicities in a dose-dependant fashion.
2. Synthesis and stereochemical determination of complestatin A and B (neuroprotectin A and B)
Steven P Breazzano, Dale L Boger J Am Chem Soc. 2011 Nov 16;133(45):18495-502. doi: 10.1021/ja208570q. Epub 2011 Oct 20.
Recently, we reported the first total synthesis of chloropeptin II (1, complestatin), the more strained and challenging of the two naturally occurring chloropeptins. Central to the design of the approach and by virtue of a single-step, acid-catalyzed ring expansion rearrangement of chloropeptin II to chloropeptin I, the route also provided a total synthesis of chloropeptin I. Herein, we report a complementary and divergent oxidation of chloropeptin II (1, complestatin) to either complestatin A (2, neuroprotectin A) or complestatin B (3, neuroprotectin B), providing the first synthesis of the natural products and establishing their remaining stereochemical assignments. Key to the approach to complestatin A (2, neuroprotectin A) was the development of two different single-step indole oxidations (HCl-DMSO and NBS, THF-H(2)O) that avoid the rearrangement of chloropeptin II (1) to chloropeptin I (4), providing the 2-oxindole 2 in superb yields (93% and 82%). With a mechanistic understanding of features that impact the latter oxidation and an appreciation of the intrinsic reactivity of the chloropeptin II indole, its modification (NCS, THF-H(2)O; Cs(2)CO(3), DMF-H(2)O) provided a two-step, single-pot oxidation of chloropeptin II (1) to afford directly the 3-hydroxy-2-oxindole complestatin B (3, neuroprotectin B). Extensive studies conducted on the fully functionalized synthetic DEF ring system of chloropeptin II were key to the unambiguous assignment of the stereochemistry as well as the exploration and subsequent development of the mild oxidation conditions used in the synthesis of complestatin A and B.
3. Neuroprotectins A and B, bicyclohexapeptides protecting chick telencephalic neurons from excitotoxicity. II. Structure determination
H Kobayashi, K Shin-Ya, K Furihata, K Nagai, K Suzuki, Y Hayakawa, H Seto, B S Yun, I J Ryoo, J S Kim, C J Kim, I D Yoo J Antibiot (Tokyo). 2001 Dec;54(12):1019-24. doi: 10.7164/antibiotics.54.1019.
In the course of our search for neuroprotective agents of microbial origin against kainate-induced neurotoxicity, we have succeeded in the isolation of two new bicyclohexapeptides, neuroprotectins A and B, together with a known compound, complestatin, from the fermentation broth of Streptomyces sp. Q27107. They are closely related in structure to complestatin and possess an oxindolylalanine moiety in place of the tryptophan residue present in complestatin.
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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 ╳
