catalytic cysteine

By Targets:	Amine N-methyltransferase (1) CHIKV (2) Deubiquitinase (1) Endogenous Metabolite (1) Fluorescent Dye (1) Influenza Virus (1) Keap1-Nrf2 (1) Phosphatase (1) Reactive Oxygen Species (ROS) (2) Virus Protease (1)
By Research Areas:	Cancer (3) Infection (1) Inflammation/Immunology (2) Metabolic Disease (3) Neurological Disease (3)
Click Chemistry:	Alkynes (1)

Targets Recommended: ASCT

Cat. No.	Product Name	Target	Research Areas	Chemical Structure

HY-161762

RA-0002034 RA-2034	CHIKV Virus Protease	Infection
RA-0002034 is a Chikungunya virus (CHIKV) nsP2 protease inhibitor with an IC₅₀ of 58 nM. RA-0002034 covalently modifies the catalytic cysteine in a site-specific manner .

HY-B2188

S-Methyl-L-cysteine 2 Publications Verification L-S-Methylcysteine	Reactive Oxygen Species (ROS)	Neurological Disease Metabolic Disease
S-Methyl-L-cysteine is a natural product that acts as a substrate in the catalytic antioxidant system mediated by methionine sulfoxide reductase A (MSRA), with antioxidative, neuroprotective, and anti-obesity activities.

HY-171036

GAPDH-IN-1	Endogenous Metabolite	Metabolic Disease
GAPDH-IN-1 (Compound F8) is a GAPDH inhibitor (IC₅₀ of 39.31 μM for GAPDH enzymatic activity). GAPDH-IN-1 forms a covalent adduct with an aspartic acid in the active site to displace NAD ⁺, a cofactor of the enzyme, with concomitant enhancement of the cysteine-reactive probe reaction with the catalytic cysteine .

HY-143345

EN523	Deubiquitinase	Cancer
EN523 is a OTUB1 recruiter. EN523 targets a non-catalytic allosteric cysteine C23 in the K48-ubiquitin-specific deubiquitinase OTUB1 .

HY-147517

Keap1-Nrf2-IN-9	Keap1-Nrf2	Neurological Disease Inflammation/Immunology
Keap1-Nrf2-IN-9 (Compound 11) is a potent Keap1-Nrf2 PPI (Keap1-Nrf2 protein-protein interaction) inhibitor with an IC₅₀ of 0.575 μM. Keap1-Nrf2-IN-9 increases the expression of Nrf2 target genes including heme oxygenase 1 (Hmox1), glutathione S-transferase P (GstP), and glutamate-cysteine ligase catalytic (Gclc) and modulatory (Gclm) subunits. Keap1-Nrf2-IN-9 shows no cytotoxic activity in ARPE19 cells .

HY-B2188R

S-Methyl-L-cysteine (Standard)	Reactive Oxygen Species (ROS)	Neurological Disease Metabolic Disease
S-Methyl-L-cysteine (Standard) is the analytical standard of S-Methyl-L-cysteine. This product is intended for research and analytical applications. S-Methyl-L-cysteine is a natural product that acts as a substrate in the catalytic antioxidant system mediated by methionine sulfoxide reductase A (MSRA), with antioxidative, neuroprotective, and anti-obesity activities.

HY-161762A

(E/Z)-RA-0002034 (E/Z)-RA-2034	Influenza Virus CHIKV	Cancer
(E/Z)-RA-0002034 is a Chikungunya virus (CHIKV) nsP2 protease inhibitor with IC50 of 58 nM. RA-0002034 covalently modifies the catalytic cysteine in a site-specific manner.

HY-N12776

Illudalic acid	Phosphatase	Cancer
Illudalic acid is a potent and selective Leukocyte antigen-related (LAR) phosphatase inhibitor with an IC₅₀ value of 1.30 µM. Illudalic acid inhibits LAR phosphatase through covalent ligation to the catalytic cysteine residue .

HY-W093017

4-Chloropyridine	Amine N-methyltransferase	Others
4-Chloropyridine is an inhibitor of nicotinamide N-methyltransferase (NNMT). It can act as a substrate for NNMT and, during its catalytic reaction, enhances the electrophilicity of the C4 position by methylating the nitrogen atom of the pyridine ring. This promotes an aromatic nucleophilic substitution reaction with the non-catalytic cysteine (C159) in NNMT, ultimately leading to the suicide inhibition of NNMT's activity. 4-Chloropyridine holds potential for the development of NNMT activity-based probes .

HY-125384

ARN14686	Fluorescent Dye	Inflammation/Immunology
ARN14686 is an activity-based protein profiling (ABPP) probe. ARN14686 inhibits hNAAA with high potency (IC₅₀=0.006 μM). ARN14686 interacts with NAAA via covalent binding to the N-terminal cysteine. ARN14686 binds only to the catalytically active form of NAAA, and may serve therefore as an efficient activity-based probe .

Cat. No.	Product Name

HY-L175

Inflammasomes related Compound Library	125 compounds
Inflammasomes are classic pattern recognition receptors for natural immune responses. Inflammasomes are polymeric protein complexes that regulate inflammatory responses and pyrolytic cell death, thereby exerting the host's defense against microorganisms. Inflammasomes sensors are associated with adapter proteins, activating inflammatory caspase-1, releasing inflammatory cytokines and inducing cell death, endowing the host with defense against pathogens. NLRP1, NLRP3, NLRC4, AIM2, and pyrin are considered typical inflammasomes because they convert cysteine asparaginase-1 into catalytically active capsaicin-1. In addition to infectious diseases, the importance of inflammasomes is also related to various clinical diseases, such as autoimmune diseases, neurodegeneration and metabolic disorders, and the development of cancer. Therefore, it is necessary to strictly regulate the activation and function of inflammasomes to avoid accidental host tissue damage while inducing pathogens to kill the inflammatory response. MCE designs a unique collection of 125 inflammasomes related compounds. It is a good tool to be used for research on Inflammation, cancer and other diseases.

Inflammasomes related Compound Library

125 compounds

Inflammasomes are classic pattern recognition receptors for natural immune responses. Inflammasomes are polymeric protein complexes that regulate inflammatory responses and pyrolytic cell death, thereby exerting the host's defense against microorganisms. Inflammasomes sensors are associated with adapter proteins, activating inflammatory caspase-1, releasing inflammatory cytokines and inducing cell death, endowing the host with defense against pathogens. NLRP1, NLRP3, NLRC4, AIM2, and pyrin are considered typical inflammasomes because they convert cysteine asparaginase-1 into catalytically active capsaicin-1. In addition to infectious diseases, the importance of inflammasomes is also related to various clinical diseases, such as autoimmune diseases, neurodegeneration and metabolic disorders, and the development of cancer. Therefore, it is necessary to strictly regulate the activation and function of inflammasomes to avoid accidental host tissue damage while inducing pathogens to kill the inflammatory response.

MCE designs a unique collection of 125 inflammasomes related compounds. It is a good tool to be used for research on Inflammation, cancer and other diseases.

HY-L081

Phosphatase Inhibitor Library	159 compounds
Protein phosphorylation is a key post-translational modification underlying the regulation of many cellular processes. Phosphatases and kinases contribute to the regulation of protein phosphorylation homeostasis in the cell. This reversible regulation of protein phosphorylation is critical for the proper control of a wide range of cellular activities, including cell cycle, proliferation and differentiation, metabolism, cell-cell interactions, etc. Protein phosphatases have evolved in separate families that are structurally and mechanistically distinct. Based on substrate specificity and functional diversity, protein phosphatases are classified into two superfamilies: Protein serine/threonine phosphatases and Protein tyrosine phosphatases. Ser/Thr phosphatases are metalloenzymes belonging to two major gene families termed PPP (phosphoprotein phosphatase) and PPM (metal-dependent protein phosphatases), whereas protein tyrosine phosphatases (PTPs) belong to distinct classes of enzymes that utilize a phospho-cysteine enzyme intermediate as a part of their catalytic action. MCE supplies a unique collection of 159 phosphatase inhibitors that mainly targeting protein tyrosine phosphatases (PTPs) and serine/threonine-specific protein phosphatases. MCE Phosphatase Inhibitor Library is a useful tool for phosphatase drug discovery and related research.

Phosphatase Inhibitor Library

159 compounds

Protein phosphorylation is a key post-translational modification underlying the regulation of many cellular processes. Phosphatases and kinases contribute to the regulation of protein phosphorylation homeostasis in the cell. This reversible regulation of protein phosphorylation is critical for the proper control of a wide range of cellular activities, including cell cycle, proliferation and differentiation, metabolism, cell-cell interactions, etc.

Protein phosphatases have evolved in separate families that are structurally and mechanistically distinct. Based on substrate specificity and functional diversity, protein phosphatases are classified into two superfamilies: Protein serine/threonine phosphatases and Protein tyrosine phosphatases. Ser/Thr phosphatases are metalloenzymes belonging to two major gene families termed PPP (phosphoprotein phosphatase) and PPM (metal-dependent protein phosphatases), whereas protein tyrosine phosphatases (PTPs) belong to distinct classes of enzymes that utilize a phospho-cysteine enzyme intermediate as a part of their catalytic action.

MCE supplies a unique collection of 159 phosphatase inhibitors that mainly targeting protein tyrosine phosphatases (PTPs) and serine/threonine-specific protein phosphatases. MCE Phosphatase Inhibitor Library is a useful tool for phosphatase drug discovery and related research.

Cat. No.	Product Name	Category	Target	Chemical Structure

HY-B2188

S-Methyl-L-cysteine 2 Publications Verification L-S-Methylcysteine	other families Ketones, Aldehydes, Acids Source classification Plants	Reactive Oxygen Species (ROS)
S-Methyl-L-cysteine is a natural product that acts as a substrate in the catalytic antioxidant system mediated by methionine sulfoxide reductase A (MSRA), with antioxidative, neuroprotective, and anti-obesity activities.

HY-B2188R

S-Methyl-L-cysteine (Standard)	other families Ketones, Aldehydes, Acids Source classification Plants	Reactive Oxygen Species (ROS)
S-Methyl-L-cysteine (Standard) is the analytical standard of S-Methyl-L-cysteine. This product is intended for research and analytical applications. S-Methyl-L-cysteine is a natural product that acts as a substrate in the catalytic antioxidant system mediated by methionine sulfoxide reductase A (MSRA), with antioxidative, neuroprotective, and anti-obesity activities.

HY-N12776

Illudalic acid	Microorganisms Terpenoids Sesquiterpenes Source classification	Phosphatase
Illudalic acid is a potent and selective Leukocyte antigen-related (LAR) phosphatase inhibitor with an IC₅₀ value of 1.30 µM. Illudalic acid inhibits LAR phosphatase through covalent ligation to the catalytic cysteine residue .

Cat. No.	Compare	Product Name	Application	Reactivity

HY-P83153

	GCLC Antibody (YA2898) GCLC; GLCL; GLCLC; Glutamate--cysteine ligase catalytic subunit; GCS heavy chain; Gamma-ECS; Gamma-glutamylcysteine synthetase	WB	Human, Mouse, Rat
	GCLC Antibody (YA2898) is a Rabbit-derived and non-conjugated IgG monoclonal antibody, targeting to GCLC.

HY-P86305

	GCLC Antibody (YA5997) GCLC; GLCL; GLCLC; Glutamate--cysteine ligase catalytic subunit; GCS heavy chain; Gamma-ECS; Gamma-glutamylcysteine synthetase	WB, ICC/IF, IP, ELISA	Human, Mouse, Rat
	GCLC Antibody (YA5997) is a Rabbit-derived and non-conjugated IgG monoclonal antibody, targeting to GCLC.

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Cat. No.	Product Name		Classification

HY-125384

ARN14686		Alkynes
ARN14686 is an activity-based protein profiling (ABPP) probe. ARN14686 inhibits hNAAA with high potency (IC₅₀=0.006 μM). ARN14686 interacts with NAAA via covalent binding to the N-terminal cysteine. ARN14686 binds only to the catalytically active form of NAAA, and may serve therefore as an efficient activity-based probe .

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