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Antibiotic
Esperamicin
Другие языки:

Esperamicin

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Esperamicin A1
Structural formula of esperamicin A1
Ball-and-stick model of the Esperamicin A1 molecule
Identifiers
3D model (JSmol)
ChEMBL
ChemSpider
PubChem CID
UNII
  • InChI=1S/C59H80N4O22S4/c1-28(2)60-36-27-77-43(25-39(36)73-8)83-52-50(66)47(63-85-45-24-37(64)53(86-12)31(5)79-45)29(3)80-57(52)82-38-18-16-14-15-17-20-59(71)34(19-21-88-89-87-13)46(38)48(62-58(70)76-11)51(67)54(59)84-44-26-42(49(65)30(4)78-44)81-56(69)33-22-40(74-9)41(75-10)23-35(33)61-55(68)32(6)72-7/h14-15,19,22-23,28-31,36-39,42-45,47,49-50,52-54,57,60,63-66,71H,6,21,24-27H2,1-5,7-13H3,(H,61,68)(H,62,70)/b15-14-,34-19+ checkY
    Key: LJQQFQHBKUKHIS-WJHRIEJJSA-N checkY
  • InChI=1/C59H80N4O22S4/c1-28(2)60-36-27-77-43(25-39(36)73-8)83-52-50(66)47(63-85-45-24-37(64)53(86-12)31(5)79-45)29(3)80-57(52)82-38-18-16-14-15-17-20-59(71)34(19-21-88-89-87-13)46(38)48(62-58(70)76-11)51(67)54(59)84-44-26-42(49(65)30(4)78-44)81-56(69)33-22-40(74-9)41(75-10)23-35(33)61-55(68)32(6)72-7/h14-15,19,22-23,28-31,36-39,42-45,47,49-50,52-54,57,60,63-66,71H,6,21,24-27H2,1-5,7-13H3,(H,61,68)(H,62,70)/b15-14-,34-19+
    Key: LJQQFQHBKUKHIS-WJHRIEJJBF
  • O=C(C(\OC)=C)Nc1cc(OC)c(OC)cc1C(=O)OC2CC(OC(C)C2O)OC7C(=O)C(\NC(=O)OC)=C6/C(=C\CSSSC)C7(O)C#C\C=C/C#CC6OC5OC(C)C(NOC3OC(C)C(SC)C(O)C3)C(O)C5OC4OCC(NC(C)C)C(OC)C4
Properties
C59H80N4O22S4
Molar mass 1325.54 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

The esperamicins are chromoprotein enediyne antitumor antibiotics of bacterial origin. Esperamicin A1 is the most well studied compound in this class. Esperamcin A1 and the related enediyne calicheamicin are the two most potent antitumor agents known. The esperamicins are extremely toxic DNA splicing compounds.

Oxygen and active oxygen-radical scavengers have no significant influence upon DNA strand breakage by esperamicin, but the cleavage of DNA by esperamicin is greatly accelerated in the presence of thiol compounds. The preferential cutting sites of esperamicin are at thymidylate residues, and the frequency of nucleobase attacked (T greater than C greater than A greater than G) is different from that of calicheamicin (C much greater than T greater than A = G), neocarzinostatin (T greater than A greater than C greater than G), or bleomycin (C greater than T greater than A greater than G).


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