C3142

α-Chymotrypsin from bovine pancreas

(TLCK treated to inactivate residual tryspin activity), Type VII, essentially salt-free, lyophilized powder, ≥40 units/mg protein

• Sinónimos: TLCK-Chymotrypsin
• CAS Number: 9004-07-3
• Número CE: 3.4.21.1 (BRENDA, IUBMB)
• Número CE: 232-671-2
• Número MDL: MFCD00130481
• Código UNSPSC: 12352204
• eCl@ss: 42010112
• NACRES: NA.54

Propiedades

• Nivel de calidad: 200
• tpo: Type VII
• Formulario: essentially salt-free, lyophilized powder
• actividad específica: ≥40 units/mg protein
• mol peso: 25 kDa
• solubilidad: 1 mM HCl: soluble 10 mg/mL, clear
• Nº de acceso UniProt: P00767
• temp. de almacenamiento: −20°C
• Información sobre el gen: cow ... CTRB1(618826)

Descripción

Aplicación

α-Chymotrypsin from Sigma has been used to determine the crystal structures of two homologous inhibitors (pars intercerebralis major peptide-C and pars intercerebralis major peptide-D2v) from the insect Locusta migratoria by forming a complex with the enzyme.

Acciones bioquímicas o fisiológicas

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, α₂-macroglobulin, 10 mM Cu²⁺ and Hg²⁺.

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.

Definición de unidad

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

Nota de preparación

TLCK treatment inactivates trypsin which may be present in chymotrypsin, without affecting the chymotrypsin activity.

Nota de análisis

Protein determined by A1%/280

Otras notas

View more information on chymotrypsin at www.sigma-aldrich.com/enzymeexplorer

Información de seguridad

• Pictogramas: GHS08,GHS07,GHS09
• Palabra de señalización: Danger
• Frases de peligro: H302,H315,H319,H334,H335,H400
• Consejos de prudencia: P261 - P264 - P273 - P301 + P312 - P302 + P352 - P305 + P351 + P338
• Clasificaciones de peligro: Acute Tox. 4 Oral - Aquatic Acute 1 - Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - STOT SE 3
• Órganos de actuación: Respiratory system
• Código de clase de almacenamiento: 11 - Combustible Solids
• Clase de riesgo para el agua (WGK): WGK 1
• Equipo de protección personal: dust mask type N95 (US), Eyeshields, Faceshields, Gloves