gram-positive bacterias

Pyrindamycin B is an antibiotic,and actives against gram-positive and gram-negative bacterias

Cefotiam hydrochloride (SCE-963 hydrochloride) is the hydrochloride salt form of cefotiam, a third-generation, semi-synthetic, beta-lactam cephalosporin antibiotic with antibacterial activity. Cefotiam binds to penicillin-binding proteins (PBPs), transpeptidases that are responsible for crosslinking of peptidoglycan. By preventing crosslinking of peptidoglycan, cell wall integrity is lost and cell wall synthesis is halted.

Thiocoraline is a depsipeptide and DNAbis-intercalator originally isolated fromMicromonosporawith antibacterial and anticancer activities.1,2It is active against the Gram-positive bacteriaS. aureus,B. subtilis, andM. luteus(MICs = 0.05, 0.05, and 0.03 μg/ml, respectively) but not Gram-negativeE. coli,K. pneumoniae, orP. aeruginosa(MICs = >100 μg/ml for all).1Thiocoraline inhibits RNA and DNA polymerase and thymidylate synthase (IC50s = 6, 6, and 15 μg/ml, respectively), as well as RNA and DNA synthesisin vitro(IC50s = 0.008 and 0.4 μg/ml, respectively). It is cytotoxic to P388, A549, HT-29, and MEL-28 cancer cells (IC50s = 0.002, 0.002, 0.01, and 0.002 μg/ml, respectively). 1.Romero, F., Espilego, F., Pérez Baz, J., et al.Thiocoraline, a new depsipeptide with antitumor activity produced by a marine Micromonospora. I. Taxonomy, fermentation, isolation, and biological activitiesJ. Antibiot. (Tokyo)50(9)734-737(1997) 2.Negri, A., Marco, E., García-Hernández, V., et al.Antitumor activity, X-ray crystal structure, and DNA binding properties of thiocoraline A, a natural bisintercalating thiodepsipeptideJ. Med. Chem.50(14)3322-3333(2007)

CAY10742 is an orally bioavailable oxadiazole antibiotic.1It is active against the Gram-positive bacteriaS. aureus,S. epidermidis,S. haemolyticus,B. cereus,B. licheniformis,E. faecalis, andE. faecium(MICs = 1-4 μg/ml), including laboratory strains and clinical isolates with varying degrees of resistance to methicillin, vancomycin, linezolid, and other antibiotics. CAY10742 (40 mg/kg) reduces the number of bacteria in mouse neutropenic thigh models of linezolid-sensitive or -resistant methicillin-resistantS. aureus(MRSA) infection. 1.Boudreau, M.A., Ding, D., Meisel, J.E., et al.Structure-activity relationship for the oxadiazole class of antibacterialsMed. Chem. Lett.11(3)322-326(2019)

Heronapyrrole B is a farnesylated 2-nitropyrrole bacterial metabolite that has been found inStreptomycesand has antibacterial activity.1,2It is active against the Gram-positive bacteriaS. aureusandB. subtilis(MICs = 1.8 and 7.5 μM, respectively) but not Gram-negativeP. aeruginosaorE. coli.1 1.Raju, R., Piggott, A.M., Diaz, L.X.B., et al.Heronapyrroles A-C: farnesylated 2-nitropyrroles from an Australian marine-derived Streptomyces spOrg. Lett.12(22)5158-5161(2010) 2.Matsuo, T., Hashimoto, S., Nishikawa, K., et al.Total synthesis and complete stereochemical assignment of heronapyrroles A and BTetrahedron Letters565345-5348(2015)

MRL-494 hydrochloride, an antibacterial agent, is a inhibitor of β-barrel assembly machine A (BamA) impervious to efflux and the outer membrane permeability barrier. MRL-494 hydrochloride can inhibits Gram-positive (MIC of 12.5 μM for Staphylococcus aureus COL) and Gram-negative (MIC of 25 μM for E. coli JCM158) bacterias .