PLOD2 Peptide - C-Terminal Region Blocking Peptide

The protein encoded by this gene is a membrane-bound homodimeric enzyme that is localized to the cisternae of the rough endoplasmic reticulum. The enzyme (cofactors iron and ascorbate) catalyzes the hydroxylation of lysyl residues in collagen-like peptides. The resultant hydroxylysyl groups are attachment sites for carbohydrates in collagen and thus are critical for the stability of intermolecular crosslinks. Some patients with Ehlers-Danlos syndrome type VIB have deficiencies in lysyl hydroxylase activity. Mutations in the coding region of this gene are associated with Bruck syndrome. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jul 2008]

PLOD2: Forms hydroxylysine residues in -Xaa-Lys-Gly- sequences in collagens. These hydroxylysines serve as sites of attachment for carbohydrate units and are essential for the stability of the intermolecular collagen cross-links. Defects in PLOD2 are the cause of Bruck syndrome type 2 (BRKS2). Bruck syndrome, also known as osteogenesis imperfecta with congenital joint contractures, is an autosomal recessive disease characterized by generalized osteopenia, joint contractures at birth, fragile bones and short stature. It can be distinguished from osteogenesis imperfecta by the absence of hearing loss and dentinogenesis imperfecta, and by the presence of clubfoot and congenital joint limitations. The molecular defect is an aberrant cross-linking of bone collagen, due to underhydroxylation of lysine residues within the telopeptides of type I collagen, whereas the lysine residues in the triple helix are normal. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Endoplasmic reticulum; Amino Acid Metabolism - lysine degradation; Oxidoreductase; EC 1.14.11.4

Chromosomal Location of Human Ortholog: 3q24

Cellular Component: endoplasmic reticulum membrane; endoplasmic reticulum; rough endoplasmic reticulum membrane

Molecular Function: L-ascorbic acid binding; iron ion binding; procollagen-lysine 5-dioxygenase activity

Biological Process: extracellular matrix organization and biogenesis; response to hypoxia; protein modification process

Disease: Bruck Syndrome 2