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Periostin

Developmental stage

In the heart, expressed from embryonic day 10.5. Continues to be strongly expressed throughout cardiac development and into adulthood (PubMed:11335131).

Function

Induces cell attachment and spreading and plays a role in cell adhesion (PubMed:10404027). Enhances incorporation of BMP1 in the fibronectin matrix of connective tissues, and subsequent proteolytic activation of lysyl oxidase LOX (PubMed:20181949).

Post-translational modifications

Gamma-carboxylation is controversial. Gamma-carboxyglutamated; gamma-carboxyglutamate residues are formed by vitamin K dependent carboxylation; these residues may be required for binding to calcium (PubMed:18450759). According to a more recent report in human, does not contain vitamin K-dependent gamma-carboxyglutamate residues (By similarity).

Tissue specificity

Preferentially expressed in periosteum and periodontal ligament (PubMed:10404027). Also expressed in the developing and adult heart (PubMed:11335131).

Cellular localization

  • Golgi apparatus
  • Secreted
  • Secreted
  • Extracellular space
  • Extracellular matrix
  • Colocalizes with BMP1 in the Golgi (PubMed:20181949).

Alternative names

  • Periostin
  • PN
  • Osteoblast-specific factor 2
  • OSF-2
  • Postn
  • Osf2

Target type

Proteins

Molecular weight

93144Da