CHY5S

α-Chymotrypsin from bovine pancreas

≥40 units/mg protein, vial of 5 mg

• Synonyme(s) : α-chymotrypsin A and B
• Numéro CAS: 9004-07-3
• Numéro de classification (Commission des enzymes): 3.4.21.1 (BRENDA, IUBMB)
• Numéro CE : 232-671-2
• Numéro MDL: MFCD00130481
• Code UNSPSC : 12352204
• Nomenclature NACRES : NA.54

Propriétés

• Source biologique: bovine pancreas
• Niveau de qualité: 200
• Description: aseptically filled
• Type: Type IV-S
• Forme: solid
• Activité spécifique: ≥40 units/mg protein
• Poids mol.: 25 kDa
• Composition: protein, ≥85% UV
• Conditionnement: vial of 5 mg
• Numéro d'accès UniProt: P00767
• Température de stockage: −20°C
• Informations sur le gène: cow ... CTRB1(618826)

Description

Application

α-Chymotrypsin from bovine has been used in a study to inform proteasome inhibition in order to advance anticancer research. α-Chymotrypsin from bovine has also been used in a study that functionalized surface anchored poly(methylhydrosiloxane) thin films on oxidized silicon wafers.

α-Chymotrypsin from bovine pancreas has been used:

• as a supplement for the collection of semen into Tris diluent
• as one of the proteases in the analysis of major histocompatibility complex (MHC) class II protease sensitivity assay
• as a component in YEPD broth for biofilm dispersion assay
• in the preparation of chitinase–chymotrypsin–DMSO buffer (CCD buffer) for enzymatic digestion of larvae

The enzyme from Sigma has been used to assess the effect of limited proteolysis with α-chymotrypsin on the sperm penetration.

Actions biochimiques/physiologiques

α-Chymotrypsin is a serine peptidase and has 241 amino acid residues contained in three polypeptide chains (A chain-13 residues, B chain-131 residues, and C chain-97 residues) linked by disulfide bridges. Molecular weight of this enzyme is found to be 25 kDa. Its pI is 8.75. It selectively hydrolyzes peptide bonds on the C-terminal side of tyrosine, phenylalanine, tryptophan, and leucine. Ca²⁺ activates and stabilizes the enzyme. The enzyme is inhibited by diisopropyl fluorophosphate (DFP), phenylmethanesulfonyl fluoride (PMSF), N-p-tosyl-L-phenylalanine chloromethyl ketone (TPCK), chymostatin, aprotinin, α1-antitrypsin, and α2-macroglobulin, 10 mM Cu²⁺ and Hg^2+.

A serine protease that hydrolyzes peptide bonds with aromatic or large hydrophobic side chains (Tyr, Trp, Phe, Met, Leu) on the carboxyl end of the bond.

Définition de l'unité

One unit will hydrolyze 1.0 μmole of BTEE per min at pH 7.8 at 25 °C.

Remarque sur l'analyse

Protein determined by A1%/280

Informations sur la sécurité

• Pictogrammes: GHS08,GHS07,GHS09
• Mention d'avertissement: Danger
• Mentions de danger: H302,H315,H319,H334,H335,H400
• Conseils de prudence: P261 - P264 - P273 - P301 + P312 - P302 + P352 - P305 + P351 + P338
• Classification des risques: Acute Tox. 4 Oral - Aquatic Acute 1 - Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - STOT SE 3
• Organes cibles: Respiratory system
• Code de la classe de stockage: 11 - Combustible Solids
• Classe de danger pour l'eau (WGK): WGK 1
• Équipement de protection individuelle: dust mask type N95 (US), Eyeshields, Faceshields, Gloves