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Results for "

Quorum

" in MedChemExpress (MCE) Product Catalog:

By Targets:	ADC Cytotoxin (1) Antibiotic (3) Apoptosis (1) Bacterial (50) Biochemical Assay Reagents (4) COX (1) Drug Metabolite (1) Elastase (1) Endogenous Metabolite (1) ERK (1) Fungal (2) HCV (1) HIV Integrase (1) JNK (1) Melanocortin Receptor (1) Mitochondrial Metabolism (1) NO Synthase (1) Parasite (3) Reactive Oxygen Species (1) SOD (1)
By Research Areas:	Cancer (4) Infection (60) Inflammation/Immunology (4) Metabolic Disease (3) Neurological Disease (1)

Inhibitors & Agonists

Biochemical Assay Reagents

Peptides

Natural
Products

Cat. No.	Product Name	Target	Research Areas	Chemical Structure

HY-137407

N-Phenylacetyl-L-homoserine lactone	Bacterial	Infection
N-Phenylacetyl-L-homoserine lactone is a small diffusible signaling molecule that strongly antagonizes or super-activates the quorum sensing of Vibrio fischeri .

HY-149479

Quorum sensing-IN-3	Bacterial	Infection
Quorum sensing-IN-3 (Compound 3a) is a quorum sensing inhibitor against pseudomonas aeruginosa. Quorum sensing-IN-3 inhibits biofilm formation .

HY-163838

Quorum sensing-IN-6	Bacterial	Infection
Quorum sensing-IN-6 (compound 27) is a quorum sensing (QS) inhibitor with IC₅₀ values of 8 and 106 nM for E.coli and Pyocyanin, respectively .

HY-N12660

Quorum sensing-IN-4	Bacterial	Infection
Quorum sensing-IN-4 (compound 2) is a quorum sensing inhibitor, and can be isolated from Thailand mangrove-derived Streptomyces strain, OUCMDZ-5511 .

HY-159170

Quorum sensing-IN-7	Bacterial	Infection
Quorum sensing-IN-7 (compound HSL 4) is a potent quorum sensing (QS) inhibitor. Quorum sensing-IN-7 interacts with Leu 72 and Gln 95 in the CviR binding pocket. Quorum sensing-IN-7, an antibacterial agent, is highly effective at inhibiting the production of homoserine lactones (HSLs) and biofilm in C. violaceum at 0.25-1 mg/mL .

HY-139902

Quorum sensing-IN-1	Others	Others
Quorum sensing-IN-1 is a small-molecule quorum sensing inhibitor.

HY-162624

Quorum sensing-IN-5	Bacterial	Infection
Quorum sensing-IN-5 is a RpfF-targeted quorum-sensing inhibitor. Quorum sensing-IN-5 inhibits Xanthomonas oryzae pv oryzae (Xoo) and Xanthomonas axonopodis pv. citri (Xac) with EC₅₀ values of 9.91 μg/mL and 7.04 μg/mL. Quorum sensing-IN-5 has antimicrobial activity .

HY-149881

Quorum sensing-IN-2	Bacterial	Infection
Quorum sensing-IN-2 (compound 23e) is a quorum sensing inhibitor, which can reduce the pathogenicity of bacteria without affecting bacterial growth. Quorum sensing-IN-2 inhibits bacterial infections with little hemolytic activity. Quorum sensing-IN-2 shows synergistic effect with Ciprofloxacin (HY-B0356) in the bacteremia model infected with P. aeruginosa PAO1 .

HY-169191

Quorum sensing-IN-8	Bacterial	Infection
Quorum sensing-IN-8 (compound 5e) has anti-biofilm activity. Quorum sensing-IN-8 can be used for the study of antimicrobial resistance .

HY-163508

Antibacterial agent 210	Bacterial	Infection
Antibacterial agent 210 (compound A9), an amide derivative, is a Pseudomonas aeruginosa quorum sensing inhibitor (QSI). Antibacterial agent 210 inhibits the quorum sensing systems by binding with LasR and PqsR, especially PqsR .

HY-W045071

N-Hexanoyl-DL-homoserine lactone	Bacterial	Infection
N-Hexanoyl-DL-homoserine lactone is a bacterial quorum sensing molecule produced in the rhizosphere. N-Hexanoyl-DL-homoserine lactone, a bacterial quorum sensing signal, induces transcriptional changes in Arabidopsis and may contribute to tuning plant growth to the microbial composition of the rhizosphere .

HY-129405

N-(Ketocaproyl)-DL-homoserine lactone	Bacterial	Infection
N-(Ketocaproyl)-DL-homoserine lactone is a natural, very active ligand of LuxR. N-(Ketocaproyl)-DL-homoserine lactone is a quorum sensing (QS) autoinducer .

HY-158193

N-Decanoyl cyclopentylamide C10-CPA	Bacterial	Infection
N-Decanoyl cyclopentylamide (C10-CPA) is a potent inhibitor of quorum sensing in Pseudomonas aeruginosa. N-Decanoyl cyclopentylamide interferes with expression of Pseudomonas aeruginosa virulence factors regulated by the las and rhl quorum-sensing systems. N-Decanoyl cyclopentylamide inhibits production of elastase, pyocyanin, and rhamnolipid and biofilm formation .

HY-129405R

N-(Ketocaproyl)-DL-homoserine lactone (Standard)	Bacterial	Infection
N-(Ketocaproyl)-DL-homoserine lactone (Standard) is the analytical standard of N-(Ketocaproyl)-DL-homoserine lactone. This product is intended for research and analytical applications. N-(Ketocaproyl)-DL-homoserine lactone is a natural, very active ligand of LuxR. N-(Ketocaproyl)-DL-homoserine lactone is a quorum sensing (QS) autoinducer .

HY-149762

IMBI	Bacterial	Infection
IMBI (compound 32) is an antibacterial agent that inhibits quorum sensing (QS) against drug-resistant pathogens. IMBI inhibits biofilm formation of Salmonella marcescens and restores or increases its susceptibility to antimicrobial drugs .

HY-P2522

Competence-Stimulating Peptide-2 (CSP-2)	Bacterial	Infection
Competence-Stimulating Peptide-2 (CSP-2) is a quorum sensing signal peptide produced by Streptococcus pneumoniae. ComD2 is a compatible receptor of Competence-Stimulating Peptide-2 (CSP-2) with an EC₅₀ value of 50.7 nM .

HY-P10486

AIP-II	Bacterial	Infection
AIP-II is a macrocyclic peptide signaling molecule used for quorum sensing, which can be produced be Staphylococcus aureus. AIP-II binds to AgrC-II receptor, regulates the virulence gene expression in Staphylococcus aureus. AIP-II is an antagonist for AgrC-I receptor .

HY-P2145

Extracellular death factor EDF	Bacterial	Infection
Extracellular death factor (EDF) is the only single signaling molecule involved in Escherichia coli quorum sensing, and can initiate MAZEF-mediated cell death. Extracellular death factor significantly amplifies the endoribonucleolytic activities of both MazF and ChpBK .

HY-122143

V-06-018	Bacterial	Infection
V-06-018 is a potent LasR antagonist with an IC₅₀ value of 5.2 µM. V-06-018 can be used as chemical probes of quorum sensing (QS) in Pseudomonas aeruginosa .

HY-N10192

Aculene D	Endogenous Metabolite Bacterial	Infection
Aculene D, a fungal metabolite, shows quorum sensing (QS) inhibitory activity against Chromobacterium violaceum CV026, and could significantly reduce violacein production in N-hexanoyl-l-homoserine lactone (C6-HSL) induced C. violaceum CV026 cultures at sub-inhibitory concentrations .

HY-114505

3-Hydroxypentadecane-4-one	Others	Infection
3-Hydroxypentadecane-4-one (LAI-1; Legionella autoinducer-1) is a quorum sensing signaling molecule by Legionella pneumophila. 3-Hydroxypentadecane-4-one is an autoinducer, which affects the intercellular communication between bacteria through sensor kinases, LqsS, LqsT and LqsR .

HY-156439

Antibiofilm agent-2	Bacterial	Infection
Antibiofilm agent-2 (compound 4T) is a potent biofilm inhibitor with an IC₅₀ of 3.6 μM. Antibiofilm agent-2 inhibits the quorum sensing system and iron homeostasis as antibacterial synergists against Pseudomonas aeruginosa .

HY-133683

N-(3-Oxotetradecanoyl)-DL-homoserine lactone 3-Oxo-C14-AHL	Others	Metabolic Disease
N-(3-Oxotetradecanoyl)-DL-homoserine lactone, a member of N-Acyl homoserine lactone (AHL) from gram-negative bacteria, is a quorum sensing (QS) signaling molecule .

HY-158730

N-3-Hydroxybutyryl-L-homoserine lactone 3-OH-C4-HSL; N-3-Hydroxybutanoyl-L-homoserine lactone; N-3-Hydroxybutyryl-L-HSL	Bacterial	Infection
N-3-Hydroxybutyryl-L-homoserine lactone (3-OH-C4-HSL) is an acyl-homoserine lactone, that can be isolated from Vibrionaceae. N-3-Hydroxybutyryl-L-homoserine lactone is a signaling molecule that is involved in bacterial quorum sensing (QS). N-3-Hydroxybutyryl-L-homoserine lactone senses the density of bacterial population, regulates the cellular process, such as bioluminescence, biofilm formation, and exo-enzyme production .

HY-141641

N-(3-Oxopentanoyl)-L-homoserine lactone HSL	Bacterial	Infection
N-(3-Oxopentanoyl)-L-homoserine lactone is an autoinducer, a kind of chemical signal molecule which passively diffuses across the bacterial envelope and accumulates intracellularly at high bacterial densities. It may bind to a protein related to the LuxR protein of V. fischeri and causes cell density-dependent gene expression. N-(3-Oxopentanoyl)-L-homoserine can be used for research of quorum sensing .

HY-111278

Pyocyanin 1 Publications Verification Pyocyanine; Sanazin; Sanasin	Reactive Oxygen Species Bacterial Drug Metabolite	Infection Inflammation/Immunology
Pyocyanin (Pyocyanine) is a toxic, quorum sensing (QS) controlled metabolite produced by Pseudomonas aeruginosa. Pyocyanin is a REDOX active compound that promotes the production of reactive oxygen species (ROS). Pyocyanin has antibacterial and anti-inflammatory activity .

HY-117005

C450-0730	Bacterial	Infection
C450-0730 is an antagonist targeting the AHL membrane-bound sensor kinase and is an antagonist of the nine-transmembrane protein LuxN of Vibrio harveyi . C450-0730 competitively binds to the LuxN AI-1 binding site and specifically antagonizes the LuxN/AI-1 quorum sensing signal in Vibrio harveyi. The inhibitory activity of C450-0730 against LuxN ^I209F was not significant .

HY-134215

cis-11-Methyl-2-dodecenoic acid	Bacterial Fungal	Infection
cis-11-Methyl-2-dodecenoic acid is a quorum sensing (QS) signal that acts as a diffusion signaling factor (DSF) in extracellular microbial and fungal communication systems. DSF is involved in the regulation of virulence and biofilm formation of a variety of bacterial pathogens .

HY-P2454

CSP1	Bacterial	Infection
CSP1 is a potent and selective ComD1 receptor agonist, with an IC₅₀ of 10.3 nM. CSP1 is a major variants of competence-stimulating peptide (CSP), and it can regulate genetic transformation of S. pneumonia by modulating quorum sensing (QS). CSP1 can act as an antibacterial agent .

HY-145462

N-cis-Octadec-9Z-enoyl-L-homoserine lactone	Bacterial	Infection
N-cis-octadec-9Z-enoyl-L-Homoserine lactone is a potent inhibitor of AhyI. AhyI (expressing acylhomoserine lactone) is responsible for the biosynthesis of autoinducer-1 (AI-1), commonly referred to as a quorum sensing (QS) signaling molecule, which plays an essential role in bacterial communication. N-cis-octadec-9Z-enoyl-L-Homoserine lactone is a competitive inhibitor of AI-1 biosynthesis .

HY-162957

LasR-IN-5	Others	Infection
LasR-IN-5 (compound 3C) is a LasR antagonist with an IC₅₀ of 1.37 μM, demonstrating a 77% inhibition of biofilm formation in Pseudomonas aeruginosa. LasR-IN-5 also exhibits quorum sensing (QS) inhibition activity and has potential applications in Pseudomonas aeruginosa infection research .

HY-146304

YXL-13	Bacterial	Infection
YXL-13 is a potent Pseudomonas aeruginosa (PAO1) inhibitor with an IC₅₀ value of 3.686 μM. YXL-13 can inhibit virulence factors and biofilm formation of PAO1. YXL-13 reduces the pathogenicity and agent resistance of PAO1 by inhibition of the quorum sensing (QS) system. YXL-13 can be used for researching anti-bacteria .

HY-W007390

Methyl 2-amino-5-bromobenzoate	Bacterial	Infection
Methyl 2-amino-5-bromobenzoate (compound 8/12) can be used for synthesis of 2-benzamidobenzoic acids, which are known FabH inhibitors. The derivates also inhibit PqsD, the pqs quorum sensing (QS) system of Pseudomonas aeruginosa, involving the production of a number of virulence factors and biofilm formation .

HY-W008806

N-(3-Oxohexanoyl)-L-homoserine lactone OHHL; N-(3-Oxohexanoyl)homoserine lactone	Bacterial	Infection Inflammation/Immunology
N-(β-ketocaproyl)-L-Homoserine lactone is a component of quorum regulatory sensing .

HY-114544A

N-3-oxo-dodecanoyl-L-homoserine lactone OdDHL	Bacterial	Others
N-3-oxo-dodecanoyl-L-Homoserine lactone (3-oxo-C12-HSL) is a bacterial quorum-sensing signaling molecule produced by *P. aeruginosa* and strains of the *B. cepacia* complex ^[2].Quorum sensing is a regulatory system used by bacteria for controlling gene expression in response to increasing cell density.N-3-oxo-dodecanoyl-L-Homoserine lactone induces the production of IL-8 in 16HBE human bronchial epithelial cells .

HY-115845

ML366	Others	Infection
ML366 is an inhibitor of Vibrio cholerae Quorum Sensing, exhibiting activity by targeting the LuxO response regulator.

HY-108700

N-3-Oxo-octanoyl-L-homoserine lactone	SOD	Infection
N-3-Oxo-octanoyl-L-homoserine lactone, a quorum-sensing signal, is an Agrobacterium autoinducer .

HY-116762

N-butyryl-L-Homocysteine thiolactone	Biochemical Assay Reagents	Others
Quorum sensing is a regulatory system used by bacteria to control gene expression in response to increased cell density. The control of bacterial infection by quenching the quorum sensing system of bacteria is a promising research area. The expression of specific target genes, such as transcriptional regulators belonging to the LuxIR protein family, is coordinated by the synthesis of diffusible acyl homoserine lactone (AHL) molecules. N-butyryl-L-Homocysteine thio-lactone is an analog of N-butyryl-L-homoserine lactone, a small, diffusible signaling molecule involved in quorum sensing, thereby controlling gene expression and cellular metabolism . N-butyryl-L-homocysteine thiolactone induces violacein expression in Viola viola mutants that normally fail to produce AHL.

HY-W554514

D-Homoserine lactone	Others	Infection
D-Homoserine lactone is a signaling molecule with the activity of regulating bacterial quorum sensing. The chemical structure of D-Homoserine lactone makes it a potential regulator of the AHL synthase RhlI. D-Homoserine lactone has been shown to inhibit the activity of RhlI, thereby affecting the bacterial quorum sensing signaling pathway. D-Homoserine lactone is also an enantiomer of L-homoserine lactone and is used as an inhibitor of serine hydroxymethyltransferase .

HY-W342499

3-Hydroxy myristic acid methyl ester Methyl 3-hydroxytetradecanoate; 3-OH PAME; Methyl 3-hydroxymyristate	Others	Metabolic Disease
3-Hydroxy myristic acid methyl ester (Methyl 3-hydroxytetradecanoate) is the quorum-sensing signal molecule (quormone), which regulates the virulence of Ralstonia solanacearum .

HY-158124

LasR antagonist 1	Bacterial	Infection
LasR antagonist 1 (Compound 7) is an antagonist for LasR with an IC₅₀ of 0.4 μM, that modulates the quorum sensing (QS) in the opportunistic pathogen Pseudomonas aeruginosa .

HY-119808

Terrein	Melanocortin Receptor Apoptosis Antibiotic	Cancer
Terrein is a melanogenesis inhibitor . Terrein induces apoptosis in breast cancer cell lines . Terrein is an inhibitor of quorum sensing and c-di-GMP in Pseudomonas aeruginosa .

HY-134560

N-(3-Oxodecanoyl)-L-homoserine lactone 3-Oxo-C10-HSL	Others	Inflammation/Immunology
N-(3-Oxodecanoyl)-L-homoserine lactone (3-Oxo-C10-HSL) is a bacterial quorum sensing signal autoinducer molecule .

HY-131011

Furanone C-30 1 Publications Verification	Bacterial	Infection
Furanone C-30 is a quorum sensing inhibitor. Furanone C-30 can effectively inhibit bacterial biofilm formation by S. mutans and its luxSmutant strain .

HY-N7788

cis-2-Dodecenoic acid	Bacterial	Infection
cis-2-Dodecenoic acid, originally discovered in Burkholderia cenocepacia, can interfere with the bacterial quorum sensing system and inhibit bacterial biofilm formation and virulence factor production .

HY-N4117

Hamamelitannin	Bacterial	Infection
Hamamelitannin, a polyphenol extracted from the bark of Hamamelis virginiana, is a quorum-sensing (QS) inhibitor. Hamamelitannin increases antibiotic susceptibility of staphylococcus aureus biofilms by affecting peptidoglycan biosynthesis and eDNA release .

HY-146706

PqsR-IN-2	Bacterial	Infection
PqsR-IN-2 (Compound 19) is a potent PqsR (Pseudomonas aeruginosa quorum sensing transcriptional regulator) inhibitor. PqsR-IN-1 attenuates pyocyanin production and has very low cytotoxicity .

HY-146705

PqsR-IN-1	Bacterial	Infection
PqsR-IN-1 (Compound 18) is a potent PqsR (Pseudomonas aeruginosa quorum sensing transcriptional regulator) inhibitor. PqsR-IN-1 attenuates pyocyanin production and has very low cytotoxicity .

HY-124237A

N-Octanoyl-L-homoserine lactone	Bacterial	Infection
N-octanoyl-L-Homoserine lactone is a small diffusible signaling molecule involved in quorum sensing, thereby controlling gene expression and affecting cellular metabolism. N-octanoyl-L-Homoserine lactone can be used for the infection prevention and regulation of virulence in cystic fibro.

HY-115393A

N-Heptanoyl-L-homoserine lactone	Bacterial	Infection
N-Heptanoyl-L-homoserine lactone is a member of N-acyl-homoserine lactone family. N-acyl-homoserine lactones (AHL) can regulate gene expression in gram-negative bacteria, such as Echerichia and Salmonella, and are involved in quorum sensing, cell to cell communication among bacteria.

Cat. No.	Product Name	Type

HY-116762

N-butyryl-L-Homocysteine thiolactone

Microbial Culture

Quorum sensing is a regulatory system used by bacteria to control gene expression in response to increased cell density. The control of bacterial infection by quenching the quorum sensing system of bacteria is a promising research area. The expression of specific target genes, such as transcriptional regulators belonging to the LuxIR protein family, is coordinated by the synthesis of diffusible acyl homoserine lactone (AHL) molecules. N-butyryl-L-Homocysteine thio-lactone is an analog of N-butyryl-L-homoserine lactone, a small, diffusible signaling molecule involved in quorum sensing, thereby controlling gene expression and cellular metabolism . N-butyryl-L-homocysteine thiolactone induces violacein expression in Viola viola mutants that normally fail to produce AHL.

HY-114773

N-Undecanoyl-L-homoserine lactone

Microbial Culture

Quorum sensing is a regulatory system used by bacteria to control gene expression in response to increased cell density. This regulatory process manifests itself in a variety of phenotypes, including biofilm formation and virulence factor production. Coordinated gene expression is achieved through the production, release and detection of small diffusible signaling molecules called autoinducers. N-acylated homoserine lactones (AHLs) comprise a class of such autoinducers, each of which generally consists of a fatty acid coupled to a homoserine lactone (HSL). Modulation of bacterial quorum-sensing signaling systems to suppress pathogenesis represents a new approach to antimicrobial research for infectious diseases. AHLs differ in acyl length (C4-C18), C3 substitution (hydrogen, hydroxyl, or oxo group), and the presence or absence of one or more carbon-carbon double bonds in the fatty acid chain. These differences confer signaling specificity through the affinity of the LuxR family of transcriptional regulators. C11-HSL has a rare odd-numbered acyl carbon chain and may be a minor quorum-sensing signaling molecule in Pseudomonas aeruginosa strains.

HY-W127487

N-Octadecanoyl-L-homoserine lactone

Drug Delivery

Quorum sensing is a regulatory system used by bacteria to control gene expression in response to increased cell density. This regulatory process manifests itself in a variety of phenotypes, including biofilm formation and virulence factor production. Coordinated gene expression is achieved through the production, release and detection of small diffusible signaling molecules called autoinducers. N-acylated homoserine lactones (AHLs) comprise a class of such autoinducers, each of which generally consists of a fatty acid coupled to a homoserine lactone (HSL). Modulation of bacterial quorum-sensing signaling systems to suppress pathogenesis represents a new approach to antimicrobial research for infectious diseases. AHLs differ in acyl length (C4-C18), C3 substitution (hydrogen, hydroxyl, or oxo group), and the presence or absence of one or more carbon-carbon double bonds in the fatty acid chain. These differences confer signaling specificity through the affinity of the LuxR family of transcriptional regulators. C18-HSL, one of four lipophilic long acyl side chain AHLs produced by the LuxI AHL synthase homolog SinI, is involved in quorum-sensing signaling in strains of Rhizobium meliloti (a nitrogen-fixing bacterial symbiont of the legume M. sativa) . C18-HSL and other hydrophobic AHLs tend to localize in the relatively lipophilic environment of bacterial cells and cannot diffuse freely across the cell membrane. Long-chain N-acyl homoserine lactones can be exported from cells by efflux pumps, or can be transported between communicating cells by extracellular outer membrane vesicles.

HY-W127393

N-Nonanoyl-L-homoserine lactone

Biochemical Assay Reagents

Quorum sensing is a regulatory system used by bacteria to control gene expression in response to increased cell density. This regulatory process manifests itself in a variety of phenotypes, including biofilm formation and virulence factor production. Coordinated gene expression is achieved through the production, release and detection of small diffusible signaling molecules called autoinducers. N-acylated homoserine lactones (AHLs) comprise a class of such autoinducers, each of which generally consists of a fatty acid coupled to a homoserine lactone (HSL). Modulation of bacterial quorum-sensing signaling systems to suppress pathogenesis represents a new approach to antimicrobial research for infectious diseases. AHLs differ in acyl length (C4-C18), C3 substitution (hydrogen, hydroxyl, or oxo group), and the presence or absence of one or more carbon-carbon double bonds in the fatty acid chain. These differences confer signaling specificity through the affinity of the LuxR family of transcriptional regulators. C9-HSL is a rare odd-numbered acyl carbon chain produced by wild-type Erwinia carotovora strain SCC 3193 grown in nutrient-rich Luria-Bertani broth (LB) medium.

Cat. No.	Product Name	Target	Research Area

HY-P2522

Competence-Stimulating Peptide-2 (CSP-2)	Bacterial	Infection
Competence-Stimulating Peptide-2 (CSP-2) is a quorum sensing signal peptide produced by Streptococcus pneumoniae. ComD2 is a compatible receptor of Competence-Stimulating Peptide-2 (CSP-2) with an EC₅₀ value of 50.7 nM .

HY-P2454

CSP1	Bacterial	Infection
CSP1 is a potent and selective ComD1 receptor agonist, with an IC₅₀ of 10.3 nM. CSP1 is a major variants of competence-stimulating peptide (CSP), and it can regulate genetic transformation of S. pneumonia by modulating quorum sensing (QS). CSP1 can act as an antibacterial agent .

HY-P1934

Cyclo(Phe-Pro) 4 Publications Verification Cyclo(phenylalanylprolyl); A-64863	HCV	Infection
Cyclo(Phe-Pro) (Cyclo(phenylalanylprolyl)), a Vibrio vulnificus quorum-sensing molecule, inhibits retinoic acid-inducible gene-I (RIG-I) polyubiquitination, through its specific interaction with RIG-I, to blunt IRF-3 activation and type-I IFN production. Cyclo(Phe-Pro) (Cyclo(phenylalanylprolyl)) enhances susceptibility to hepatitis C virus (HCV), as well as Sendai and influenza viruses .

HY-P1940

Maculosin Cyclo(Tyr-Pro)	Peptides	Cancer
Maculosin is a host-specific phytotoxin for spotted knapweed from Alternaria alternata. Maculosin is a quorum-sensing molecule involved in cell-cell communication by Pseudomonas aeruginosa. Maculosin also acts as a signaling molecule regulating virulence gene expression in Lactobacillus reuteri. Maculosin shows antioxidant, anti-cancer and non-toxicity properties. Maculosin shows cytotoxic activity against the human liver cancer cell lines, with an IC₅₀ of 48.90 µg/mL .

HY-P10486

AIP-II	Bacterial	Infection
AIP-II is a macrocyclic peptide signaling molecule used for quorum sensing, which can be produced be Staphylococcus aureus. AIP-II binds to AgrC-II receptor, regulates the virulence gene expression in Staphylococcus aureus. AIP-II is an antagonist for AgrC-I receptor .

HY-P2145

Extracellular death factor EDF	Bacterial	Infection
Extracellular death factor (EDF) is the only single signaling molecule involved in Escherichia coli quorum sensing, and can initiate MAZEF-mediated cell death. Extracellular death factor significantly amplifies the endoribonucleolytic activities of both MazF and ChpBK .

HY-P1892

Competence-Stimulating Peptide-12261	Peptides	Infection
Competence-Stimulating Peptide-12261, a sixteen peptide, is a fragment of competence-stimulating peptide. Competence-Stimulating Peptide, a quorum-sensing molecule, competence-stimulating peptide (CSP) which inhibits germ tube (GT) formation .

HY-124237

N-Octanoyl-DL-homoserine lactone	Peptides	Others
N-Octanoyl-DL-homoserine lactone is a member of N-acyl homoserine lactones (AHLs) family, also one of the signal molecule of quorum-sensing (QS) signals. N-Octanoyl-DL-homoserine lactone can regulate the production of siderophores and present positive correlation in Aeromonas sobria strain AS7. N-Octanoyl-DL-homoserine lactone can also regulate the secretion of proteases and stimulate the production of total volatile basic nitrogen (TVB-N) .

HY-W141788

N-Butyryl-DL-homocysteine thiolactone	Peptides	Infection
N-Butyryl-DL-homocysteine thiolactone is an N-acyl homoserine lactone (AHL) analogue. AHLs are potent inhibitors of biofilm formation and virulence factors, and has been used for degrading microbial communities, reducing bacterial pathogenicity .

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