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Rabbit Anti-Lactoperoxidase antibody
Lactoperoxidase is an antibacterial agent in cow milk. The heme protein lactoperoxidase (LPO), also referred to as salivary peroxidase (SPO), is an oxidoreductase secreted into milk. LPO, a 712 amino acid protein, belongs to the XPO subfamily of the peroxidase family. It is expressed in mammary and salivary glands, and in the presence of H2O2, LPO acts as a catalyst for the oxidation of many phenols and aromatic amines. It is crucial for protecting the lactating mammary gland and intestinal tract of newborn infants against microorganisms. LPO binds one calcium ion per heterodimer and one heme B (iron-protoporphyrin IX) group covalently per heterodimer. The LPO gene, which spans 28 kb, is similar in gene organization and sequence to the peroxidase genes MPO and EPX, suggesting the possibility that these genes evolved from a common ancestral gene. The LPO and MPO genes are arranged in a tail-to-tail manner on chromosome 17q23.1.
Function:
Lactoperoxidase is a natural antibacterial agent in bovine milk, a medium otherwise rich in its ability to support bacterial growth. Milk lactoperoxidase levels vary among species, ranging from little or none in humans to very high concentrations in guinea pigs. Interestingly, lactoperoxidase from milk is identical to the lacrimal and salivary forms of the enzyme. In addition, the enzyme catalyzes the hydrogen peroxide oxidation of iodine and can be employed in labelling proteins with radioiodine.
Subcellular Location:
Secreted - extracellular space
Tissue Specificity:
Mammary gland; milk and salivary gland. Found in bronchial submucosal glands.
Similarity:
Belongs to the peroxidase family. XPO subfamily.
SWISS:
P22079
Gene ID:
4025
Database links:
Entrez Gene: 4025 Human
Omim: 150205 Human
SwissProt: P22079 Human
Unigene: 234742 Human
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