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Lactoperoxidase from bovine milk

Name: Lactoperoxidase from bovine milk
Brand: SIGMA

lyophilized powder (essentially salt-free), ≥200 units/mg protein

Synonym(s):

Donor:hydrogen peroxide oxidoreductase, Peroxidase

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About This Item

CAS Number:

9003-99-0

NACRES:

NA.54

UNSPSC Code:

12352204

EC Number:

232-668-6

MDL number:

MFCD00131484

EC Number:

1.11.1.7 (BRENDA, IUBMB)

eCl@ss:

32160410

Specific activity:

≥200 units/mg protein

Biological source:

bovine milk

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Properties

biological source

bovine milk

Quality Segment

200

form

lyophilized powder (essentially salt-free)

specific activity

≥200 units/mg protein

absorbance ratio

A_412/280 nm 0.7-0.9

UniProt accession no.

P80025

storage temp.

−20°C

SMILES string

[O+H2]O[O-]

InChI

1S/H2O3/c1-3-2/h1-2H

InChI key

JSPLKZUTYZBBKA-UHFFFAOYSA-N

Gene Information

cow ... LPO(280844)

Description

General description

Lactoperoxidase is a major enzyme present in bovine milk and belongs to the peroxidase family. It is present in both plants and animals. The enzyme structure comprises a single polypeptide chain made up of 612 amino acid residues.[1]

Application

Lactoperoxidase from bovine milk has been used as a standard for milk lactoperoxidase to study the role of H₂O₂ in the inhibition of Staphylococcus aureus growth by Lactococcus garvieae in the presence of lactoperoxidase in raw milk.[2] It has also been used in lactoperoxidase-mediated iodination to prepare radiolabeled peptides.[3]

Biochem/physiol Actions

Lactoperoxidase catalyzes the oxidation of iodide to iodine by hydrogen peroxide. This activity provides a gentle, specific alternative to chloramine T for the radioiodination of proteins and DNA.

Lactoperoxidase contributes to the antimicrobial system of milk[2] by inactivating a wide range of micro-organisms. This lactoperoxidase-mediated antimicrobial system is also identified in human secretions such as tear-fluid, saliva, and milk. Lactoperoxidase catalyzes the oxidation of molecules by releasing H2O2. The product exhibits antimicrobial activity.[1]

Analysis Note

Protein determined by Lowry method.

Other Notes

One unit will oxidize 1.0 μmole of 2,2′-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) at pH 5.5 at 25 °C.

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This Item	61328	77332	M6908
Sigma-Aldrich L2005 Lactoperoxidase from bovine milk	Sigma-Aldrich 61328 Lactoperoxidase from bovine milk	Sigma-Aldrich 77332 Peroxidase from horseradish	Sigma-Aldrich M6908 Myeloperoxidase from human leukocytes
description lyophilized powder (essentially salt-free), ≥200 units/mg protein	description lyophilized, powder, ≥150 U/mg	description lyophilized, powder, ~150 U/mg	description lyophilized powder, ≥50 units/mg protein
biological source bovine milk	biological source -	biological source horseradish	biological source human leucocytes
Gene Information cow ... LPO(280844)	Gene Information cow ... LPO(280844)	Gene Information -	Gene Information human ... MPO(4353)
specific activity ≥200 units/mg protein	specific activity ≥150 U/mg	specific activity ~150 U/mg	specific activity ≥50 units/mg protein
form lyophilized powder (essentially salt-free)	form powder	form powder	form lyophilized powder
storage temp. −20°C	storage temp. −20°C	storage temp. 2-8°C	storage temp. −20°C
UniProt accession no. P80025	UniProt accession no. P80025	UniProt accession no. -	UniProt accession no. P05164

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pictograms

GHS08

signalword

Danger

hcodes

H334

pcodes

P261 - P284 - P501

Hazard Classifications

Resp. Sens. 1

Storage Class

11 - Combustible Solids

wgk

WGK 1

ppe

Eyeshields, Gloves, type N95 (US)

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