Periostin (POSTN) [POSTN/3501]

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Summary

Periostin (PN), also designated osteoblast-specific factor 2 (OSF-2), is a disulfide linked protein originally isolated as a osteoblast-specific factor. Periostin is a secreted protein that binds heparin and functions as a ligand for 伪V尾3 and 伪V尾5 integrins. In preosteoblasts, Periostin acts as a cell adhesion molecule and plays a role in osteoblast recruitment, spreading and attachment. Periostin is mainly detected in lower gastrointestinal tract, aorta, stomach, placenta, uterus and breast tissues but is up-regulated in epithelial ovarian tumors and overexpressed in breast cancer. Expression of Periostin is increased by bone morphogenetic protein (BMP2) and transforming growth factor 尾 1 (TGF 尾 1). Periostin contains a typical signal sequence, followed by a cysteine-rich domain, a fourfold repeated domain, which shows homology with the insect protein fasciclin, and a C-terminal domain.

Product Properties & Targets

Host
Applications
Species Reactivity
Isotype
Cellular Localization
Extracellular matrix, Extracellular space, Golgi apparatus, Secreted
Light Chain
Gene Name
Positive Control
breast or colon tissue., Human placenta
Immunogen
Recombinant fragment (around aa193-326) of human POSTN protein (exact sequence is proprietary)
Alternate Names
Periostin, Osteoblast-specific factor 2, Fasciclin-I like; Osteoblast specific factor 2 (OSF2); PDLPOSTN; Periodontal ligament specific periostin; Periostin isoform thy2 / th4 / thy6 / thy8; Periostin osteoblast specific factor; PN; POSTN

Database Links

Entrez Gene ID
Unigene
SwissProt

Additional Information

Clone
POSTN/3501
Human Gene Symbol
POSTN
Chromosome Location
13q13.3
Mol. Weight of Antigen
84/74kDa (Periostin); 90kDa (secreted glycoprotein)

Functions

  • Induces cell attachment and spreading and plays a role in cell adhesion (PubMed:12235007). Enhances incorporation of BMP1 in the fibronectin matrix of connective tissues, and subsequent proteolytic activation of lysyl oxidase LOX (By similarity).

Known Applications & Suggested Dilutions

  • Immunohistochemistry (Formalin-fixed) (1-2ug/ml for 30 minutes at RT),(Staining of formalin-fixed tissues requires heating tissue sections in 10mM Tris with 1mM EDTA, pH 9.0, for 45 min at 95 &degC followed by cooling at RT for 20 minutes),Optimal dilution for a specific application should be determined.

Key References

  • Norris, R.A., et al. 2004. Identification and detection of the Periostin gene in cardiac development. Anat. Rec. A Discov. Mol. Cell. Evol. Biol.281: 1227-1233.

Storage & Stability

Antibody with azide - store at 2 to 8 °C. Antibody without azide - store at -20 to -80 °C. Antibody is stable for 24 months. Non-hazardous. No MSDS required.

Limitations

This antibody is available for research use only and is not approved for use in diagnosis.

Supplied as

200ug/ml of Ab purified from Bioreactor Concentrate by Protein A/G. Prepared in 10mM PBS with 0.05% BSA & 0.05% azide. Also available WITHOUT BSA & azide at 1.0mg/ml.

Warranty

There are no warranties, expressed or implied, which extend beyond this description. Company is not liable for any personal injury or economic loss resulting from this product.

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