SDC1 (Concentrate)

The protein encoded by this gene is a transmembrane (type I) heparan sulfate proteoglycan and is a member of the syndecan proteoglycan family. The syndecans mediate cell binding, cell signaling, and cytoskeletal organization and syndecan receptors are required for internalization of the HIV-1 tat protein. The syndecan-1 protein functions as an integral membrane protein and participates in cell proliferation, cell migration and cell-matrix interactions via its receptor for extracellular matrix proteins. Altered syndecan-1 expression has been detected in several different tumor types. While several transcript variants may exist for this gene, the full-length natures of only two have been described to date. These two represent the major variants of this gene and encode the same protein. [provided by RefSeq, Jul 2008]

Full Name

Syndecan 1

Function

Cell surface proteoglycan that bears both heparan sulfate and chondroitin sulfate and that links the cytoskeleton to the interstitial matrix. Regulates exosome biogenesis in concert with SDCBP and PDCD6IP (PubMed:22660413).

Biological Process

Biological Process canonical Wnt signaling pathwayIEA:Ensembl
Biological Process cell migrationManual Assertion Based On ExperimentIBA:GO_Central
Biological Process inflammatory responseIEA:Ensembl
Biological Process myoblast developmentISS:UniProtKB
Biological Process odontogenesisIEA:Ensembl
Biological Process positive regulation of exosomal secretionManual Assertion Based On ExperimentIMP:UniProtKB
Biological Process positive regulation of extracellular exosome assemblyManual Assertion Based On ExperimentIMP:UniProtKB
Biological Process receptor-mediated endocytosisIEA:Ensembl
Biological Process response to calcium ionIEA:Ensembl
Biological Process response to cAMPIEA:Ensembl
Biological Process response to glucocorticoidIEA:Ensembl
Biological Process response to hydrogen peroxideIEA:Ensembl
Biological Process response to toxic substanceIEA:Ensembl
Biological Process Sertoli cell developmentIEA:Ensembl
Biological Process striated muscle cell developmentManual Assertion Based On ExperimentIEP:UniProtKB
Biological Process ureteric bud developmentIEA:Ensembl
Biological Process wound healingIEA:Ensembl

Cellular Location

Membrane
Secreted
Secreted, extracellular exosome
Shedding of the ectodomain produces a soluble form.

Topology

Extracellular: 23-254
Helical: 255-275
Cytoplasmic: 276-310

PTM

Shedding is enhanced by a number of factors such as heparanase, thrombin or EGF. Also by stress and wound healing. PMA-mediated shedding is inhibited by TIMP3.