Streptolydigin (Portamycin) is a 3-acetyltetramic acid antibiotic and a potent bacterial RNA polymerase inhibitor with a Ki of 18 μM and a Kd of 15 μM. Streptolydigin inhibits RNA synthesis by binding to RNA polymerase and does not inhibit eukaryotic RNA polymerases. Streptolydigin possess potent antibacterial activity, particularly against anaerobes and some Gram-positive aerobes.

Product information

CAS Number: 7229-50-7

Molecular Weight: 600.70

Formula: C32H44N2O9

Chemical Name: (2S)-2-[(2S,4E)-4-[(2E,4E,6R)-6-[(1R,2R,5R,6S,7R)-1,6-dimethyl-8,9-dioxaspiro[bicyclo[3.3.1]nonane-2,2'-oxiran]-3-en-7-yl]-1-hydroxy-4-methylhepta-2,4-dien-1-ylidene]-1-[(2S,5S,6S)-5-hydroxy-6-methyloxan-2-yl]-3,5-dioxopyrrolidin-2-yl]-N-methylpropanamide

Smiles: C[C@]12O[C@H](C=C[C@]31CO3)[C@H](C)[C@H](O2)[C@H](C)/C=C(\C)/C=C/C(/O)=C1/C(=O)[C@H]([C@H](C)C(=O)NC)N([C@@H]2CC[C@H](O)[C@H](C)O2)C/1=O

InChiKey: KVTPRMVXYZKLIG-NCAOFHFGSA-N

InChi: InChI=1S/C32H44N2O9/c1-16(14-17(2)28-18(3)23-12-13-32(15-40-32)31(6,42-23)43-28)8-9-22(36)25-27(37)26(19(4)29(38)33-7)34(30(25)39)24-11-10-21(35)20(5)41-24/h8-9,12-14,17-21,23-24,26,28,35-36H,10-11,15H2,1-7H3,(H,33,38)/b9-8+,16-14+,25-22+/t17-,18+,19+,20+,21+,23-,24+,26+,28-,31-,32-/m1/s1

Technical Data

Appearance: Solid Power

Purity: ≥98% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 ^oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 ^oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined

HS Tariff Code: 382200

How to use

In Vitro:

The antibiotic Streptolydigin (Stl) is a derivative of 3-acetyltetramic acid. Binding of Streptolydigin to RNA polymerase strictly depends on a noncatalytic magnesium ion which is likely chelated by the aspartate of the bridge helix of the active center. Streptolydigin inhibits T. thermophilus RNA polymerase with a Ki of 1.8 μM. Streptolydigin (Stl) inhibits initiation, elongation, and pyrophosphorolysis by bacterial RNA polymerase. Streptolydigin interacts with three structural elements within RNAP: the Stl pocket, the bridge helix, and the trigger-loop region. The Streptolydigin streptolol moiety interacts with the Streptolydigin pocket and bridge helix, and the Streptolydigin tetramic-acid moiety interacts with the trigger-loop region.

Products are for research use only. Not for human use.