b. subtilis

Dyclonine hydrochloride (Dyclonine HCl) , an over the counter throat lozenge, is found in Sucretswith local anesthetic effect .

Cyclo(Pro-Val) (Cyclo(prolylvalyl)) is obtained from the marine fungus and shows moderate antifungal and weak antitumor activities. Cyclo(Pro-Val) inhibits the growth of Bacillus subtilis with MIC of 0.8 g L.

Antimicrobial Compound 1 is an alkyl pyridinium compound with Tail 12C, Head 4-carboxyl. Antimicrobial Compound 1 exhibits antimicrobial activities against B. subtilis and E. coli.

4-Methylherniarin (7-Methoxy-4-methylcoumarin) is a coumarin derivative and fluorescent label that exhibits significant activity against B. subtilis.

o-Phenanthroline monohydrate (1, 10-Phenanthroline monohydrate) is an inhibitor of metallopeptidases, inhibits zinc-dependent hydrolysis of Fa-Gly-Leu-NH2 by B. subtilis neutral protease and B. thermoproteolyticus thermolysin.

NSC 55655 (5-[(2-Nitrophenyl)methylene]-2,4-thiazolidinedione) possesses antimicrobial and antioxidant activities and inhibits the proliferation of B. subtilis, S. aureus, K. pneumonia, E. coli, S. typhi , A. niger and C. albicans. A. niger and C. albicans, and can be used in diabetes mellitus.

CCR-11 is a tannin-containing derivative with antimicrobial activity. CCR-11 inhibits the proliferation of B. subtilis and HeLa cells. CCR-11 inhibits bacterial proliferation and bacterial cytoplasmic division by inhibiting FtsZ assembly and GTPase activity. CCR-11 has potential anti-tumor activity and can be used to study breast cancer and pediatric myelodysplasia.

Thiocillin I, a thiopeptide antibiotic, demonstrates potent in vitro antibacterial effects against Gram-positive bacteria. This compound exhibits minimum inhibitory concentrations (MICs) of 2 μg mL, 0.5 μg mL, 4 μg mL, and 0.5 μg mL against S. aureus 1974149, E. faecalis 1674621, B. subtilis ATCC 6633, and S. pyogenes 1744264, respectively.

MRSA antibiotic 2 is an antibiotic compound effective against various Gram-positive bacteria, including B. subtilis, S. aureus, and methicillin-resistant S. aureus (MRSA).

FtsZ-IN-12 (Compound 16e) is an inhibitor of filamentous temperature-sensitive mutant Z (FtsZ) that promotes the polymerization of the FtsZ protein and suppresses its GTPase activity, thus disrupting the bacterial cell division process. This compound exhibits broad-spectrum antibacterial activity, effectively inhibiting B. subtilis ATCC 9372, B. pumilus CMCC 63202, S. aureus ATCC 25923, E. coli BW25113, and A. baumannii ATCC 19606 with MIC values ranging from 0.062-1 µg mL. Additionally, FtsZ-IN-12 can inhibit biofilm formation and eliminate mature biofilms. It possesses bactericidal properties and shows no hemolytic toxicity to mammalian red blood cells at a dosage of 15 mg kg.

Antiangiogenic agent 8 (Compound 3m) functions as both an antibacterial agent and an antiangiogenic compound. It shows minimum inhibitory concentrations (MIC) of 16, 8, 4, 16, and 8 μg mL against E. coli, P. aeruginosa, B. subtilis, S. aureus, and C. glabrata, respectively, with minimum bactericidal concentrations (MBC) ranging from 32 to 64 μg mL. This compound holds potential for applications in infection control and cardiovascular disease research.

UCM05 (G28UCM) is a potent inhibitor of fatty acid synthase (FASN) with efficacy against HER2+ breast cancer xenografts, including cell lines resistant to anti-HER2 drugs [1]. Additionally, it functions as an inhibitor of the Filamentous temperature-sensitive protein Z (FtsZ), selectively inhibiting the growth of the Gram-positive bacterium B. subtilis with minimum inhibitory concentration (MIC) values of 100 μM, while showing no activity against the Gram-negative bacterium E. coli [2].

Netzahualcoyone inhibited the respiration of intact cells of B. subtilis but had no effect on the respiration of E. coli.

Roseoflavin, a chemical analog of FMN and riboflavin that has antimicrobial activity, can directly bind to FMN riboswitch aptamers and downregulate the expression of an FMN riboswitch-lacZ reporter gene in B. subtilis.

AN0128 (CRM-0005) is an anti-inflammatory boron-containing antibacterial agent that inhibits S. aureus, S. epidermidis, P. acnes, B. subtilis, and suppresses pro-inflammatory cytokine production in macrophage cell lines by inhibiting the p38 MAP kinase signaling pathway. It can be used in dermatological research.

Frequentin, an antibiotic originally isolated from P. frequentans, is active against bacteria (MICs = 200 and 300 µg ml for B. subtilis and S. aureus, respectively) and fungi.

Violacein is a bacterial metabolite originally isolated from C. violaceum that has antibacterial and antiprotozoal activities.[1] [2] It is produced by C. violaceum as a purple pigment in response to N-hexanoyl homoserine lactone , a property that has been modified to create a strain of C. violaceum used in detecting quorum-sensing molecules.[3] Violacein is active against Gram-positive bacteria, including B. subtilis and S. aureus (MICs = 0.8 and 1.6 µM, respectively). It is also active against P. falciparum, including chloroquine-susceptible and -resistant strains (IC50s = 0.85 and 0.63 µM, respectively).[2] It reduces parasitemia in a mouse model of nonlethal P. chabaudi chabaudi infection when administered at a dose of 7.5 mg/kg and increases survival in a mouse model of lethal P. chabaudi chabaudi infection. Violacein permeabilizes the cytoplasmic membrane of bacterial cells but does not affect the cell wall.[1]

Flumequine-13C3is intended for use as an internal standard for the quantification of flumequine by GC- or LC-MS. Flumequine is a fluoroquinolone antibiotic.1It is active againstS. aureus, S. pyogenes, B. subtilis, E. coli, P. aeruginosa, S. faecalis, andK. pneumoniae(MICs = 1-100 μg/ml). Flumequine is also active against field isolates of B. hyodysenteriae (MICs = 6.25-200 μg/ml).2It inhibits DNA gyrase, disrupting supercoiling of bacterial DNA to block transcription and replication.3In vivo, flumequine (50 mg/kg) increases survival in rat models ofP. vulgaris-induced urinary tract infection andP. mirabilis-induced prostatitis.1Formulations containing flumequine have been used in the treatment of urinary tract infections in veterinary medicine. 1.Rohlfing, S.R., Gerster, J.R., and Kvam, D.C.Bioevaluation of the antibacterial flumequine for urinary tract useAntimicrob. Agents Chemother.10(1)20-24(1976) 2.Aller-Morán, L.M., Martínez-Lobo, F.J., Rubio, P., et al.Evaluation of the in vitro activity of flumequine against field isolates of Brachyspira hyodysenteriaeRes. Vet. Sci.10351-53(2015) 3.Smith, J.T.The mode of action of 4-quinolones and possible mechanisms of resistanceJ. Antimicrob. Chemother.18 (Suppl. D)21-29(1986)

Deoxyviolacein is a bacterial metabolite and byproduct in the biosynthesis of the bisindole alkaloid violacein, exhibiting anticancer, antibacterial, and antifungal properties. It inhibits hepatocellular carcinoma cell proliferation at concentrations of 0.1 to 1 μM. Deoxyviolacein (125 μg ml) demonstrates antibacterial activity against Gram-positive bacteria, including S. aureus, B. subtilis, and B. megaterium, and showcases antifungal activity against R. solani at 2 mg ml.

17-hydroxy Venturicidin A is a macrolide fungal metabolite originally isolated from Streptomyces. It has antibiotic activity against M. luteus, B. subtilis, and S. aureus and antifungal activity against V. dahlia, Fusarium, and C. tropicalis in a disc assay.

Linearmycin A is a polyene antibiotic found in [Streptomyces]. It exhibits activity against bacteria [S. aureus] and [E. coli] (MICs = 3.1 and 1.6 μg disc, respectively), fungi [S. cerevisiae] and [C. albicans] (MICs = 0.1 and 1.6 μg disc, respectively), and the plant pathogenic fungus [A. niger] (MIC = 0.2 μg disc) in disc assays. Linearmycin A also induces lysis and degradation of [B. subtilis] as a component of [Streptomyces Mg1] extract.

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)

Neospiramycin I is a macrolide antibiotic and derivative of spiramycin I.1It is active against the macrolide-sensitive KB210, but not the macrolide-resistant KB224, strain ofS. aureus(MICs = 3.12 and >100 μg/ml, respectively), as well asB. cereus,B. subtilis,M. luteus,E. coli, andK. pneumoniae(MICs = 1.56, 3.12, 3.12, 0.2, 50, and 12.5 μg/ml, respectively). Neospiramycin I binds toE. coliribosomes with an IC50value of 1.2 μM. It protects against mortality in a mouse model ofS. pneumoniaetype III infection (ED50= 399.8 mg/kg).2

Terpendole I is a fungal metabolite that has been found in A. yamanashiensis.1 It is a weak inhibitor of acyl-coenzyme A:cholesterol acyltransferase (ACAT; IC50 = 145 μM) and is active against the bacteria B. cereus and B. subtilis (MICs = 100 μg/ml for both) but not S. aureus, P. aeruginosa, or K. pneumoniae (MICs = >200 μg/ml for all) or the fungus C. albicans (MIC = 200 μg/ml).1,2 It is cytotoxic to HeLa cells with an IC50 value of 52.6 μM.3 |1. Tomoda, H., Tabata, N., Yang, D.-J., et al. Terpendoles, novel ACAT inhibitors produced by Albophoma yamanashiensis. III. Production, isolation and structure elucidation of new components. J. Antibiot. (Tokyo) 48(8), 793-804 (1995).|2. Zhao, J.-C., Wang, Y.-L., Zhang, T.-Y., et al. Indole diterpenoids from the endophytic fungus Drechmeria sp. as natural antimicrobial agents. Phytochemistry 148, 21-28 (2018).|3. Nagumo, Y., Motoyama, T., Hayashi, T., et al. Structure-activity relationships of terpendole E and its natural derivatives. ChemistrySelect 2(4), 1533-1536 (2017).