catalytic cysteine

By Targets:	Biochemical Assay Reagents (1) Cathepsin (1) CHIKV (2) Deubiquitinase (2) Endogenous Metabolite (1) Fluorescent Dye (1) Influenza Virus (1) Keap1-Nrf2 (1) Phosphatase (1) Reactive Oxygen Species (ROS) (2) Reference Standards (1) SARS-CoV (2) Virus Protease (3)
By Research Areas:	Cancer (6) Infection (3) Inflammation/Immunology (2) Metabolic Disease (3) Neurological Disease (3)
Click Chemistry:	Alkynes (1)

Targets Recommended: ASCT Calpain

Cat. No.	상품명	Target	연구분야	Chemical Structure

HY-W020780

mPEG5000-Mal mPEG5000-Maleimide	Biochemical Assay Reagents	Cancer
mPEG5000-Mal (mPEG5000-Maleimide) is a PEG-derived selective covalent binding agent for sulfhydryl groups (RSGs), which can form irreversible thioether bonds with sulfhydryl groups under near-neutral conditions via the maleimide group. The mechanism of action of mPEG5000-Mal can be divided into two categories: firstly, as an enzyme modifier, it binds to target proteins through hydrophobic interactions, hydrogen bonds, and van der Waals forces, altering the protein's secondary structure; secondly, as a nanoparticle surface modifier, it covalently binds to sulfhydryl groups on the surface of red blood cells, changing the surface properties and morphology of the red blood cells, leading to their phagocytosis by macrophages of the reticuloendothelial system. mPEG5000-Mal can react with free cysteine in proteins, increasing the apparent molecular weight of the modified protein by 10-15 kDa for detection purposes. mPEG5000-Mal can enhance the thermal stability and catalytic activity of enzymes, and improve the macrophage targeting of nanoparticles, enabling targeted drug delivery. mPEG5000-Mal can be applied in enzyme engineering research in the food industry and in oncology, assisting radiotherapy by inhibiting tumor-associated macrophage infiltration and enhancing anti-tumor immune responses .

HY-172437

Secutrelvir S-892216	Virus Protease SARS-CoV	Infection
Secutrelvir is an oral SARS-CoV-2 3C-like protease (3CLpro) inhibitor and antiviral agent, with IC₅₀ values of 0.655 nM and 0.697 nM against SARS-CoV-2 3CLpro, respectively. Secutrelvir forms a reversible covalent bond with the catalytic cysteine C145 of SARS-CoV-2 3CLpro, thereby inhibiting viral replication. Secutrelvir exhibits activity against multiple SARS-CoV-2 variants and can be used in research related to coronavirus disease 2019 (COVID-19) .

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-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-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-D2188

IMP-2373	Deubiquitinase	Cancer
IMP-2373 is a low-toxicity activity-based probe targeting covalent pan-deubiquitinase (DUB), which modulates and monitors DUB activity via covalent binding to the catalytic cysteine and active site of DUB. IMP-2373 enables real-time tracking of dynamic intracellular DUB activity in physiologically relevant living cell systems, and quantitative analysis of activity changes induced by pharmacological inhibition or MYC dysregulation. IMP-2373 can be used for research on related diseases such as B-cell lymphoma .

HY-P2922

Cathepsin C	Cathepsin	Cancer
Cathepsin C is a lysosomal cysteine protease essential for catalytic activation of many serine proteases, including proteinase 3 (PR3), neutrophil elastase (NE), cathepsin G (CTSG), granzyme A/B/C, and mast cell chymase .

HY-B2188R

S-Methyl-L-cysteine (Standard) L-S-Methylcysteine (Standard)	Reactive Oxygen Species (ROS) Reference Standards	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-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 .

HY-181352

SB-140	Virus Protease SARS-CoV	Infection
SB-140 is a selective, covalent PLpro inhibitor with an IC₅₀ of ≤2.5 nM against SARS-CoV-2 PLpro. SB-140 has antiviral activity against SARS-CoV-2, MERS-CoV and SARS-CoV-1 .

Cat. No.	상품명

HY-L175

Inflammasomes related Compound Library	163 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 163 inflammasomes related compounds. It is a good tool to be used for research on Inflammation, cancer and other diseases.

Inflammasomes related Compound Library

163 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 163 inflammasomes related compounds. It is a good tool to be used for research on Inflammation, cancer and other diseases.

HY-L081

Phosphatase Inhibitor Library	175 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 175 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

175 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 175 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.	상품명	Type

HY-D2188

IMP-2373	Fluorescent Dyes
IMP-2373 is a low-toxicity activity-based probe targeting covalent pan-deubiquitinase (DUB), which modulates and monitors DUB activity via covalent binding to the catalytic cysteine and active site of DUB. IMP-2373 enables real-time tracking of dynamic intracellular DUB activity in physiologically relevant living cell systems, and quantitative analysis of activity changes induced by pharmacological inhibition or MYC dysregulation. IMP-2373 can be used for research on related diseases such as B-cell lymphoma .

IMP-2373

Fluorescent Dyes

IMP-2373 is a low-toxicity activity-based probe targeting covalent pan-deubiquitinase (DUB), which modulates and monitors DUB activity via covalent binding to the catalytic cysteine and active site of DUB. IMP-2373 enables real-time tracking of dynamic intracellular DUB activity in physiologically relevant living cell systems, and quantitative analysis of activity changes induced by pharmacological inhibition or MYC dysregulation. IMP-2373 can be used for research on related diseases such as B-cell lymphoma .

Cat. No.	상품명	Type

HY-W020780

mPEG5000-Mal mPEG5000-Maleimide	Biochemical Assay Reagents
mPEG5000-Mal (mPEG5000-Maleimide) is a PEG-derived selective covalent binding agent for sulfhydryl groups (RSGs), which can form irreversible thioether bonds with sulfhydryl groups under near-neutral conditions via the maleimide group. The mechanism of action of mPEG5000-Mal can be divided into two categories: firstly, as an enzyme modifier, it binds to target proteins through hydrophobic interactions, hydrogen bonds, and van der Waals forces, altering the protein's secondary structure; secondly, as a nanoparticle surface modifier, it covalently binds to sulfhydryl groups on the surface of red blood cells, changing the surface properties and morphology of the red blood cells, leading to their phagocytosis by macrophages of the reticuloendothelial system. mPEG5000-Mal can react with free cysteine in proteins, increasing the apparent molecular weight of the modified protein by 10-15 kDa for detection purposes. mPEG5000-Mal can enhance the thermal stability and catalytic activity of enzymes, and improve the macrophage targeting of nanoparticles, enabling targeted drug delivery. mPEG5000-Mal can be applied in enzyme engineering research in the food industry and in oncology, assisting radiotherapy by inhibiting tumor-associated macrophage infiltration and enhancing anti-tumor immune responses .

mPEG5000-Mal

mPEG5000-Maleimide

Biochemical Assay Reagents

mPEG5000-Mal (mPEG5000-Maleimide) is a PEG-derived selective covalent binding agent for sulfhydryl groups (RSGs), which can form irreversible thioether bonds with sulfhydryl groups under near-neutral conditions via the maleimide group. The mechanism of action of mPEG5000-Mal can be divided into two categories: firstly, as an enzyme modifier, it binds to target proteins through hydrophobic interactions, hydrogen bonds, and van der Waals forces, altering the protein's secondary structure; secondly, as a nanoparticle surface modifier, it covalently binds to sulfhydryl groups on the surface of red blood cells, changing the surface properties and morphology of the red blood cells, leading to their phagocytosis by macrophages of the reticuloendothelial system. mPEG5000-Mal can react with free cysteine in proteins, increasing the apparent molecular weight of the modified protein by 10-15 kDa for detection purposes. mPEG5000-Mal can enhance the thermal stability and catalytic activity of enzymes, and improve the macrophage targeting of nanoparticles, enabling targeted drug delivery. mPEG5000-Mal can be applied in enzyme engineering research in the food industry and in oncology, assisting radiotherapy by inhibiting tumor-associated macrophage infiltration and enhancing anti-tumor immune responses .

Cat. No.	상품명	Category	Target	Chemical Structure

HY-B2188

S-Methyl-L-cysteine 2 Publications Verification L-S-Methylcysteine	other families Ketones, Aldehydes, Acids Plants Source Classification	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) L-S-Methylcysteine (Standard)	Structural Classification other families Ketones, Aldehydes, Acids Plants Source Classification	Reactive Oxygen Species (ROS) Reference Standards
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 .

Host:	Rabbit (3)
Reactivity:	Human (3) Rat (3) Mouse (3)
Application:	ICC/IF (1) IP (1) WB (3) ELISA (1)
Isotype:	IgG (3)
Conjugation:	Non-conjugated (3)
Clonality:	Monoclonal (2) Recombinant (1)
Modification:	Unmodified (2)

Cat. No.	Compare	상품명	Application	Reactivity	Image

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.

HY-P83153A

	GCLC Antibody (YA2898)(PBS only) 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.

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Cat. No.	상품명		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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catalytic cysteine

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Fluorescent Dyes

Biochemical Assay Reagents

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