LEU-RO

Leupeptine hemisulfate salt

powder, from synthetic, =96.5%

• Synonyme(s) : Acétyle-Leu-Leu-Arg-al, N-acétyle-L-leucyle-L-leucyle-L-argininal hemisulfate salt
• Formule linéaire : C₂₀H₃₈N₆O₄ · 1/2H₂SO₄
• Numéro CAS: 103476-89-7
• Poids moléculaire : 475.59
• Numéro MDL: MFCD00037012
• Code UNSPSC : 12352202
• ID de substance PubChem : 329817679

Propriétés

• Source biologique: synthetic
• Niveau de qualité: 100
• Description: Ac-Leu-Leu-argininal x 1/2 H₂SO₄, synthetic
• Pureté: 96.5%
• Forme: powder
• Poids mol.: M_r 475.6
• Conditionnement: pkg of 100 mg (11529048001); pkg of 25 mg (11017128001); pkg of 5 mg (11017101001); pkg of 50 mg (11034626001)
• Fabricant/nom de marque: Roche
• Solubilité: H₂O: 50 mg/mL
• Conditions d'expédition: wet ice
• Température de stockage: 2-8°C
• Chaîne SMILES: OS(O)(=O)=O.CC(C)C[C@H](NC(C)=O)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCNC(N)=N)C=O.CC(C)C[C@H](NC(C)=O)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCNC(N)=N)C=O
• InChI: 1S/2C20H38N6O4.H2O4S/c2*1-12(2)9-16(24-14(5)28)19(30)26-17(10-13(3)4)18(29)25-15(11-27)7-6-8-23-20(21)22;1-5(2,3)4/h2*11-13,15-17H,6-10H2,1-5H3,(H,24,28)(H,25,29)(H,26,30)(H4,21,22,23);(H2,1,2,3,4)/t2*15-,16-,17-;/m00./s1
• Clé InChI: CIPMKIHUGVGQTG-VFFZMTJFSA-N

Description

Spécificité

Leupeptin inhibits serine and thiol proteases such as trypsin, plasmin, proteinase K, kallikrein, papain, thrombin, and cathepsin A and B.
Not affected are α-, β-, γ- and δ- chymotrypsin, pepsin, cathepsin D, elastase, renin, and thermolysin.

Application

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.

Actions biochimiques/physiologiques

Il s'agit d'un inhibiteur des protéases à sérine et à cystéine. Il inhibe la plasmine, la trypsine, la papaïne, la calpaïne et la cathepsine B, mais n'inhibe pas la pepsine, les cathepsines A et D, la thrombine et l'α-chymotrypsine. Sa concentration efficace s'échelonne de 10 à 100 μM. De nombreuses études ont utilisé la leupeptine pour protéger de la perte auditive induite par une surstimulation acoustique ou par la gentamicine (antibiotique ototoxique). (On pense que la perte des cellules ciliées cochléaires est médiée par la calpaïne.)

Caractéristiques et avantages

Contents
Synthetic, white powder

Qualité

Function test: Performance controlled with trypsin.

Notes préparatoires

Working concentration: 0.5 to 5 μg/ml (1 to 20 μM)

Comparison of working concentrations of pefabloc with leupeptin and PMSF is in files.

Working solution: Solvent is recommended in distilled water.
Highly soluble in water (1 mg/ml), methanol, ethanol, acetic acid, dimethyl formamide and dimethyl sulfoxide.
Poorly soluble in acetone, chloroform, ethyl ether and n-hexane.

Storage conditions (working solution): -15 to -25 °C
In aqueous solution leupeptin is stable for 1 month at 2 to 8 °C or for at least 6 months at - 15 to -25 °C, stored under nitrogen. For best results, freeze the dissolved inhibitor in aliquots and avoid repeated thawing.

Reconstitution

Highly soluble in water (1 mg/ml). Stable for at least one week at 2 to 8 °C and 6 months frozen in aliquots at -15 to -25 °C.

Remarque sur l'analyse

Leupeptin gives multiple peaks on HPLC due to equilibria among three forms in solution. Purity determined using three main peaks. Majority of contaminating peptide is racemized leupeptin.

Autres remarques

For life science research only. Not for use in diagnostic procedures.

Informations sur la sécurité

• Pictogrammes: GHS07
• Mention d'avertissement: Warning
• Mentions de danger: H302 + H312 + H332
• Conseils de prudence: P261 - P264 - P280 - P302 + P352 + P312 - P304 + P340 + P312 - P501
• Classification des risques: Acute Tox. 4 Dermal - Acute Tox. 4 Inhalation - Acute Tox. 4 Oral
• Code de la classe de stockage: 11 - Combustible Solids
• Classe de danger pour l'eau (WGK): WGK 2
• Point d'éclair (°F): Not applicable
• Point d'éclair (°C): Not applicable