Leupeptin

Bezeichnung:Leupeptin

CAS-Nr103476-89-7

Englisch Name:Leupeptin

CBNumberCB3666742

SummenformelC20H40N6O8S

Molgewicht524.63

MOL-Datei103476-89-7.mol

Leupeptin physikalisch-chemischer Eigenschaften

alpha	-76 º (c=1, water)
storage temp.	-20°C
Löslichkeit	H₂O: 10 mM Solutions are stable for a week at 4 °C. Stock solutions are stable up to 6 months at −20°C.
Aggregatzustand	Powder
Farbe	White to Off-white
Wasserlöslichkeit	soluble
Stabilität	Stable for 1 year from date of purchase as supplied Solutions in distilled water, ethanol or methanol may be stored at -20°C for up to 3 months.
InChIKey	CIPMKIHUGVGQTG-VFFZMTJFSA-N

Sicherheit

Kennzeichnung gefährlicher	Xn
R-Sätze:	20/21/22-63-36/37/38
S-Sätze:	22-24/25-36/37-36-36/37/39-26-7/8
RIDADR	3077
WGK Germany	3
F	10-23
HS Code	29252900

Gefahreninformationscode (GHS)

Leupeptin Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R20/21/22:Gesundheitsschädlich beim Einatmen,Verschlucken und Berührung mit der Haut.
R63:Kann das Kind im Mutterleib möglicherweise schädigen.
S-Sätze Betriebsanweisung:
S22:Staub nicht einatmen.
S24/25:Berührung mit den Augen und der Haut vermeiden.
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
Beschreibung
Leupeptin hemisulfate (103476-89-7) is a reversible inhibitor of trypsin-like proteases and cysteine proteases. Inhibits trypsin, plasmin, papain and cathepsin B, H and L.1-3?Blocks various apoptotic pathways in T cells.4?Commonly used in cell lysis buffers to protect proteins from degradation. Typical working concentration is 1μM (0.5 μg/ml).
Chemische Eigenschaften
White to off-white lyophilized powder
Verwenden
Leupeptin has been used as a protease inhibitor: in ice-cold lysis buffer to harvest cells for western immunoblotting and immunoprecipitation,in chromatin immunoprecipitation (ChIP) lysis buffer for the isolation of fragmented chromatin samples in lysis buffer I to lyse the cells for tandem affinity purification (TAP)
Verwenden
Leupeptin as well as other protease inhibitors like antipain, chymostatin, pepstatin, and phosphoramidon are useful for the protection of proteins during their isolation from tissues or membranes. Leupeptin can be removed from the reaction by dialysis.
Note: To check other protease inhibitors, try our Protease Inhibitor Set including Antipain Dihydrochloride, Aprotinin, Bestatin, Chymostatin, E-64, EDTA-Na₂, Leupeptin, Pefabloc SC, Pepstatin, and Phosphoramidon.
Verwenden
Reversible protease inhibitor, which inhibits cathepsin B, calpain and trypsinPharmaceutical composition containing leupeptin hemisulfate is used as an anti-malarial agent. It is employed in the treatment of noise-induced hearing loss. It also protects the heart from myocardial stunning. Further, it is used to inhibit serine, cysteine proteases, plasmin, trypsin, papain, kallikrein and cathepsin B.
Definition
ChEBI: A peptide sulfate salt obtained by combining leupeptin with 0.5 molar equivalents of sulfuric acid.
Allgemeine Beschreibung
Leupeptin, or N-acetyl-L-leucyl-L-leucyl-L-argininal, is a naturally occurring tripeptide that acts particularly as a serine protease inhibitor and as a cysteine protease inhibitor. Its mechanism of action involves structurally similar covalent binding reactions:
- In the active site of serine proteases, leupeptin forms a covalent hemiacetal adduct between the aldehyde group of leupeptin and the hydroxyl group of a serine residue in the enzyme active site.
- In the active site of cysteine proteases, the electrophilic (aldehyde) carbon of leupeptin forms a comparable bond with the sulfur atom of a cysteine residue in the enzyme active site.
Biochem/physiol Actions
Inhibitor of serine and cysteine proteases. Inhibits plasmin, trypsin, papain, calpain, and cathepsin B. Does not inhibit pepsin, cathepsins A and D, thrombin, or α-chymotrypsin. Effective concentration 10-100 μM. There have been numerous studies using leupeptin to protect against hearing loss caused by acoustic overstimulation or the ototoxic antibiotic gentamicin. (Loss of cochlear hair cells is believed to be mediated by calpain.)
Lager
+4°C
Einzelnachweise
1) Aoyagi?et al.?(1969),?Leupeptins, new protease inhibitors from Actinomycetes; J. Antibiot.,?22?283 2) Barrett?et al.?(1981),?Cathepsin B, Cathepsin H and Cathepsin L; Methods Enzymol., Pt C,?80?535 3) Knight?et al. (1980),?Human cathepsin B. Application of the substrate N-benzyloxycarbonyl-L-arginyl-L-arginine 2-naphthylamide to a study of the inhibition by leupeptin; Biochem. J.,?189?447 4) Sarin?et al. (1995),?A protease-dependent TCR-induced death pathway in mature lymphocytes; J. Immunol.,?154?5806

Leupeptin Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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