Periostin (POSTN) gene with 23 exons spanning 36 kb is mapped to chromosome 13q13.3. The gene codes for periostin, a matricellular protein that belongs to the family of non-structural matrix proteins. Periostin structure contains a signal peptide, four fasciclin-like domains (FAS1) with vitamin K-dependent γ-carboxyglutamic acid (Gla) residues, and hydrophilic C-terminal region with the heparin-binding site. The protein is mainly expressed in the periosteum, periodontal ligament, heart valves, and tendons. The antibody detects endogenous level of total periostin protein.
면역원
Peptide sequence around aa. 125-129 ( R-E-E-I-E), according to the protein NP_006466.2
애플리케이션
Anti-POSTN antibody produced in rabbit has been used in western blot.[1][2]
생화학적/생리학적 작용
Periostin (POSTN) facilitates extracellular matrix structure and organization. It acts as a collagen chaperone and regulates type I collagen fibrillogenesis. POSTN is implicated in early stages of bone formation, tissue repair, and cell recruitment and adhesion. This protein is essential for cancer stem cell maintenance and metastasis. Increased expression of POSTN has been observed in various types of cancers including prostate, breast, lung, pancreatic, ovarian, and colorectal cancer. Hence, the postn levels can be used as a prognostic biomarker for these cancers.
특징 및 장점
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표적 설명
Binds to heparin. Induces cell attachment and spreading and plays a role in cell adhesion. May play a role in extracellular matrix mineralization.
물리적 형태
Solution in phosphate-buffered saline containing 0.02% sodium azide and 50% glycerol
면책조항
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Storage Class Code
10 - Combustible liquids
WGK
WGK 1
Flash Point (°F)
Not applicable
Flash Point (°C)
Not applicable
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시험 성적서(COA)
Lot/Batch Number
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Metastatic growth in distant organs is the major cause of cancer mortality. The development of metastasis is a multistage process with several rate-limiting steps. Although dissemination of tumour cells seems to be an early and frequent event, the successful initiation
Collagen structure, folding and function
A Text Book of Fibre Science and Technology, 71-84 (2014)
Tumor microenvironment is considered nowadays as one of the main players in cancer development and progression. Tumor microenvironment is highly complex and consists of non-tumor cells (i.e., cancer-associated fibroblast, endothelial cells, or infiltrating leukocytes) and a large list of extracellular
The Journal of biological chemistry, 284(51), 35939-35950 (2009-10-20)
Periostin (gene Postn) is a secreted extracellular matrix protein involved in cell recruitment and adhesion and plays an important role in odontogenesis. In bone, periostin is preferentially expressed in the periosteum, but its functional significance remains unclear. We investigated Postn(-/-)