P5306

Papaïne from papaya latex

lyophilized powder, aseptically filled

• Synonyme(s) : Papaïnase
• Numéro CAS: 9001-73-4
• Numéro de classification (Commission des enzymes): 3.4.22.2 (BRENDA, IUBMB)
• Numéro CE : 232-627-2
• Numéro MDL: MFCD00131791
• Code UNSPSC : 12352204
• Nomenclature NACRES : NA.54

Propriétés

• Source biologique: papaya (latex)
• Niveau de qualité: 200
• Stérilité: aseptically filled
• Forme: lyophilized powder
• Activité spécifique: ≥8.0 units/mg protein
• Poids mol.: 23.4 kDa
• Solubilité: H₂O: soluble 1.2 mg/mL
• Température de stockage: −20°C

Description

Description générale

Papain is a thermostable enzyme and becomes inactive at 55°C. It has two domains and the catalytic region is present at the domain interface. The cysteine 25 in the active site performs the proteolysis by nucleophilic attack on the carbonyl carbon of a peptides. Papain has wide industrial applications in food and pharmaceutical industry.

Application

Papain is used in dissecting solutions. It is used to produce Fab fragments of antibodies . It is used for cell dissociation since it has been shown to be more effective and less damaging with certain tissues. Papain has been used to isolate morphologically intact cortical neurons from postnatal rats. Limited papain digestion is used for structural studies of enzymes and other proteins. In addition, papain is used in red cell serology to modify the red cell surface to enhance or destroy the reactivity of many red cell antigens. Papain is useful for platelet serology studies. Papain has also been used in the enzymatic synthesis of amino acids, peptides, and other molecules. Product P5306 is provided as a lyophilized powder that is aseptically filled. It has been used to digest mouse retinas to study the RAGE axis in nonproliferative diabetic retinopathy (NPDR).

The product from Sigma has been used in the digestion of extracellular matrix (ECM). It has also been used with other proteolytic enzymes for in situ protein degradation to produce crystals suitable for structure determination.

Sert à produire des fragments Fab d′anticorps. Également utilisée pour la dissociation cellulaire, car des études ont montré qu′elle s′avère plus efficace et moins détériorante avec certains tissus.

Actions biochimiques/physiologiques

Papain papaya latex has antifungal activity against C. albicans. Papain consists of a single polypeptide chain with three disulfide bridges and a sulfhydryl group necessary for activity of the enzyme.

Protéase à cystéine qui clive les liaisons peptidiques des acides aminés basiques, de la leucine ou de la glycine.
pH optimal situé entre 6,0 et 7,0.
Hydrolyse également les esters et les amides.

Définition de l'unité

One unit will hydrolyze 1.0 μmole of BAEE per minute at pH 6.2 at 25 deg C.

Notes préparatoires

Prepared from P 4762

Autres remarques

Pour en savoir plus sur la papaïne, rendez-vous sur www.sigma-aldrich.com/enzymeexplorer.

Informations sur la sécurité

• Pictogrammes: GHS08,GHS07
• Mention d'avertissement: Danger
• Mentions de danger: H315,H319,H334,H335
• Conseils de prudence: P302 + P352 - P305 + P351 + P338
• Classification des risques: 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
• Point d'éclair (°F): Not applicable
• Point d'éclair (°C): Not applicable
• Équipement de protection individuelle: dust mask type N95 (US), Eyeshields, Faceshields, Gloves