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Example sentences for: versican
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Moreover, Frizzled receptors, Versican and other proteoglycans which contribute to Wnt protein activity are also controlled by Wnt signaling, as previously described in Drosophila [ 28 29 ] . At the level of transcriptional regulation, we found up-regulation of CBP/P300, which partners with β-catenin [ 30 31 ] but also TLE/Groucho, which is an inhibitor of TCF function [ 32 ] . These responses suggest a rich system of homeostasis and feedback control mechanisms, but they complicate the interpretation of experimental studies of Wnt signal transduction in which the time course of induction cannot be controlled easily.
Aggrecan and versican are aggregating proteoglycans that are key constituents found in the extracellular matrix [ 41 ] . Both proteoglycans contain amino-terminal hyaluronic acid-binding regions, central core glycosaminoglycan attachment domains, and carboxyl-terminal domains containing EGF-like modules (one in aggrecan and two in versican), C-type lectin like modules and complement regulatory protein-like modules [ 49 50 ] . Fibulin-1 exhibits calcium-dependent binding to the carboxyl-terminal domain of aggrecan and versican [ 41 ] . The binding site of aggrecan to fibulin-1 maps to the type II EGF-like modules 8-9 and the carboxyl-terminal domain of fibulin-1 [ 41 ] . The binding site of versican to fibulin-1 maps to the type II EGF-like modules 2-8 of fibulin-1 [ 41 ] .
In the Wnt target gene promoters that are functionally mapped (MSX1, MSX2, ID2, ID3, Follistatin, REST/NRSF, Versican) we invariably found TCF binding sites.
Fibulin-1 has been reported to interact with such extracellular matrix proteins as fibronectin, laminin, nidogen, aggrecan and versican [ 39 40 41 42 ] . Fibronectin is a glycoprotein found as multimers in insoluble form in the extracellular matrix.
the interaction of fibulin-1C with aggrecan and versican) between extracellular matrix proteins argues for the interaction of the EGF-modules containing within fibulin-1C and LTBP-3 with either the heparin-binding region or with the EGF-like domain of HB-EGF.
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