d-cysteine

D-Cysteine, the D-isomer of cysteine, is a powerful inhibitor of E. coli growth and is mediated by D-amino acid oxidase to produce H2S, serving as a neuroprotective agent against cerebellar ataxia. Additionally, D-cysteine can inhibit the growth and cariogenicity of a two-species biofilm formed by Streptococcus mutans and Streptococcus hemoglobin.

(tert-Butoxycarbonyl)-D-cysteine, catalog number T66872 and CAS number 149270-12-2, is a valuable organic compound for life sciences research.

N-(((9H-Fluoren-9-yl)methoxy)carbonyl)-S-((4-methoxyphenyl)diphenylmethyl)-D-cysteine (catalog number T64441) is a valuable organic compound for life science research.

N-Acetyl-D-cysteine exhibits antioxidant activities and scavenges ROS through its thiol group reaction.

N-Boc-S-benzyl-D-cysteine, catalog number T65543 and CAS number 102830-49-9, is a valuable organic compound used in life sciences research.

N-Cbz-D-Cysteine (Cbz-D-Cys) (compound 5) serves as a potent inhibitor of β-lactamase II, exhibiting a K i value of 20.1 µM [1].

N-Isobutyryl-D-cysteine is a reagent used in biochemical reactions.

Cholic acid-cysteine-cyanuric chloride complex is a hapten linker molecule, consisting of an antigen, cholic acid, and the covalently bonded cyanuric chloride reactive group.

Penicillamine (Artamine), possessing antineoplastic properties, induces apoptosis by a p53-mediated mechanism and inhibits angiogenesis by chelating with copper, a cofactor for angiogenesis. Artamine is a beta dimethyl analog of the amino acid cysteine. As a degradation product of penicillin antibiotics, Artamine chelates with heavy metals and increases their urinary excretion.

Pyridoxal 5'-phosphate hydrate (PLP)(1:x), the active form of vitamin B6, is a cofactor for many different enzymes involved in transamination reactions, including mitochondrial cysteine desulfurase, cystathionine γ-synthase, various aminotransferases, and a d-serine dehydratase.

L-Cysteine S-sulfate (S-Sulfo-L-cysteine) is an effective N-methyl-d-aspartate (NMDA) glutamatergic receptors agonist. L-Cysteine S-sulfate is the substrate for cystine lyase [1].

D,L-Cystathionine dihydrochloride is an intermediate in the synthesis of cysteine, which acts from the isotype of cysteine-β-synthase (CBS) produced by leucine and serine. Derived from cysteine. DL-cysteine contains a cysteine (βC-S) carbon-sulfur bond.

NU6300 is an inhibitor of the first covalent ATP-competitive CDK2.

D-Ribose-L-cysteine is the antioxidant glutathione precursor.

EN219 is a synthetic recruiter of the E3 ubiquitin ligase RNF114 and binds specifically to cysteine 8 (C8) within its intrinsically disordered region, exhibiting an IC50 of 470 nM. EN219 inhibits RNF114-induced autoubiquitination and p21 ubiquitination in cell-free assays at 50 μM. At 1 μM, EN219 interacts with multiple proteins including the tubulin β1 chain (TUBB1), heat shock protein 60 (Hsp60/HspD1), and histone H3.1 (HIST1H3A) in 231MFP breast cancer cells. Furthermore, EN219 has been linked to the bromodomain inhibitor (+)-JQ1 for the creation of a PROTAC capable of degrading BRD4 in 231MFP cells.

Cathepsin D and E FRET Substrate acetate is a fluorogenic substrate for cathepsins D and E but not for B, H, or L. Cathepsin D and E FRET Substrate acetate can be used in mechanistic studies on cathepsins D and E studies.

Cefminox (Sodium) is a new cephamycin antibiotic possessing a D-amino acid moiety derived from D-cysteine at the C-7B side chain. Cefminox is active against a wide range of bacteria, especially Gram-negative and anaerobic bacteria. Cefminox shows excellent in vivo efficacy (ED50) which is higher than would be expected from its in vitro activity (MIC). Moreover, cefminox possesses more potent activity in suppression of bacterial regrowth than other cephems[1]. Cefminox (Sodium) was the most active beta-lactam, with an MIC at which 50% of isolates are inhibited (MIC50) of 1.0 microg/ml and an MIC90 of 16.0 microg/ml. Cefminox was especially active against Bacteroides fragilis (MIC90, 2.0 microg/ml), Bacteroides thetaiotaomicron (MIC90, 4.0 microg/ml), fusobacteria (MIC90, 1.0 microg/ml), peptostreptococci (MIC90, 2.0 microg/ml), and clostridia, including Clostridium difficile (MIC90, 2.0 microg/ml)[2]. The use of a single preoperative dose of cefminox was similar in efficacy to 3 doses of cefoxitin administered every 4 hours, and that the serum and tissue concentrations attained provide adequate antibiotic coverage[3]. Moreover, cefminox as a dual agonist of IP (Prostacyclin receptor) and PPARγ (peroxisome proliferator-activated receptor-gamma) that significantly inhibits PASMC proliferation by up-regulation of PTEN (phosphatase and tensin homolog) and cAMP ( cyclic adenosine monophosphate), suggesting that it has potential for treatment of PAH(pulmonary arterial hypertension)[4].

Z-L(D-Val)G-CHN2, an isoform of Z-LVG-CHN2, serves as a cell-permeable and irreversible inhibitor of cysteine proteinase. This tripeptide derivative emulates a segment of the human cysteine proteinase-binding center and demonstrates selective antiviral activity, inhibiting herpes simplex virus (HSV) yet exhibiting negligible impact on poliovirus replication. Notably, Z-LVG-CHN2 effectively impedes SARS-CoV-2 replication with an EC50 value of 190 nM by targeting the SARS-CoV-2 3CL protease [3].

S-(N-Methylsulfinylbutylthiocarbamoyl)-L-cysteine (SFN-Cys) is an isothiocyanate derivative, functioning as an active metabolite of sulforaphane, a class I and II histone deacetylase (HDAC) inhibitor, and anticancer agent. This compound is generated from sulforaphane through intermediates - DL-sulforaphane glutathione and sulforaphane cysteinylglycine - via the mercapturic acid pathway enzymes. At a concentration of 20 µM, SFN-Cys diminishes invasion and migration of U87MG and U373 MG glioblastoma cells as observed in wound healing and chamber assays. Furthermore, at 45 µM, it significantly lowers the expression of α-tubulin, βIII-tubulin, stathmin 1, and X-linked inhibitor of apoptosis (XIAP), and also reduces cell density in paclitaxel-resistant A549 lung cancer cells (A549/T). Additionally, when used at 30 µM, SFN-Cys prompts apoptosis and cell cycle arrest at the G2/M phase in U87MG and U373 MG cells.

Cys(Npys)-(Arg)9 acetate is a cell-penetrating peptide composed of 9 D-arginine residues and an activated cysteine residue C(Npys). This peptide acts as a carrier and is useful for studies involving conjugation and cellular permeability.