Related Experiment Video
Updated: May 10, 2026

Antimicrobial Peptides Produced by Selective Pressure Incorporation of Non-canonical Amino Acids
Published on: May 4, 2018
Production of ramoplanin analogues by genetic engineering of Actinoplanes sp
Hai-Xue Pan1, Zhou-Zhou Chen, Lei Shao
1State Key Laboratory of New Drug and Pharmaceutical Process, Shanghai Institute of Pharmaceutical Industry, 1320 West Beijing Road, Shanghai, 200040, China.
Abstract:
Ramoplanins are lipopeptides effective against a wide range of Gram-positive pathogens. Ramoplanin A2 is in Phase III clinical trials. The structure-activity relationship of the unique 2Z,4E-fatty acid side-chain of ramoplanins indicates a significant contribution to the antimicrobial activities but ramoplanin derivatives with longer 2Z,4E-fatty acid side-chains are not easy to obtain by semi-synthetic approaches. To construct a strain that produces such analogues, an acyl-CoA ligase gene in a ramoplanin-producing Actinoplanes was inactivated and a heterologous gene from an enduracidin producer (Streptomyces fungicidicus) was introduced into the mutant. The resulting strain produced three ramoplanin analogues with longer alkyl chains, in which X1 was purified. The MIC value of X1 was ~0.12 μg/ml against Entrococcus sp. and was also active against vancomycin-resistant Staphylococcus aureus (MIC = 2 μg/ml).
More Related Videos
Related Concept Videos
Production of Antibiotics
Production of Pharmaceuticals
Inhibitors of Gram-positive Cell Wall Synthesis
Cytoskeletal Proteins in Bacteria
Generation of Straight or Branched Actin Filaments
Arp2/3 Complex
Arp2/3 complex is a seven-subunit complex consisting of two proteins similar to actin- Arp2 and Arp3, and five other subunits that help keep Arp2 and Arp3 inactive. When required, the complex is...
Prokaryotic Transcriptional Activators and Repressors
Transcription of prokaryotic...

