Human Syndecan-4 HEK293 Overexpression Lysate: Product Information
This Human Syndecan-4 overexpression lysate was created in HEK293 Cells and intented for use as a Western blot (WB) positive control. Purification of Syndecan-4 protein (Cat: 10653-H08H) from the overexpression lysate was verified.
A DNA sequence encoding the human SDC4 (CAA47406.1) (Met1-Glu145) was expressed with a polyhistidine tag at the C-terminus.
The recombinant human SDC4 consists of 138 amino acids and predicts a molecular mass of 15.3 kDa.
Human Syndecan-4 HEK293 Overexpression Lysate: Usage Guide
Cell lysate was prepared by homogenization in ice-cold modified RIPA Lysis Buffer with cocktail of protease inhibitors (Sigma). Cell debris was removed by centrifugation. Protein concentration was determined by Bradford assay (Bio-Rad protein assay, Microplate Standard assay). The cell lysate was boiled for 5 min in 1 x SDS loading buffer (50 mM Tris-HCl pH 6.8, 12.5% glycerol, 1% sodium dodecylsulfate, 0.01% bromophenol blue) containing 5% b-mercaptoethanol, and lyophilized.
1. Centrifuge the tube for a few seconds and ensure the pellet at the bottom of the tube.
2. Re-dissolve the pellet using 200μL pure water and boil for 2-5 min.
3. Store the lyophilized cell lysate at 4℃. After re-dissolution, recommend to aliquot it into smaller quantities and store at -80℃.
1 X Sample Buffer (1 X modified RIPA buffer+1 X SDS loading buffer).
Stability & Storage
Store at 4℃ for up to twelve months from date of receipt. After re-dissolution, aliquot and store at -80℃ for up to twelve months. Avoid repeated freeze-thaw cycles.
Western Blot (WB) Optimal dilutions/concentrations should be determined by the end user.
Human Syndecan-4 HEK293 Overexpression Lysate: Alternative Names
Human SYND4 Overexpression Lysate
Syndecan-4 Background Information
SDC4 (Syndecan-4), also known as Syn4, is a transmembrane heparan sulfate proteoglycan that co-operates with integrins during cell-matrix interactions for the assembly of focal adhesions and actin stress fibers and in the phosphorylation of focal adhesion kinase (FAK) on Tyr397. Syndecan-4 plays roles in the formation of focal adhesions and stress fibers. The cytoplasmic domain of syndecan-4 interacts with a number of signalling and structural proteins, and both extracellular and cytoplasmic domains are necessary for regulated activation of associated transmembrane receptors. Syndecan-4/SDC4 is a heparan sulfate proteoglycan and works as a coreceptor for various growth factors. SDC4 deficiency limits neointimal formation after vascular injury by regulating vascular smooth muscle cells (VSMCs) proliferation and vascular progenitor cells (VPCs) mobilization. Therefore, SDC4 may be a novel therapeutic target for preventing arterial restenosis after angioplasty.
Ikesue M, et al. (2011) Syndecan-4 deficiency limits neointimal formation after vascular injury by regulating vascular smooth muscle cell proliferation and vascular progenitor cell mobilization. Arterioscler Thromb Vasc Biol. 31(5): 1066-74.
Saoncella S, et al. (2004) Syndecan-4 regulates ATF-2 transcriptional activity in a Rac1-dependent manner. J Biol Chem. 279(45): 47172-6.
Bass MD, et al. (2002) Cytoplasmic interactions of syndecan-4 orchestrate adhesion receptor and growth factor receptor signalling. Biochem J. 368(Pt 1): 1-15.
Couchman JR, et al. (1999) Syndecan-4 and integrins: combinatorial signaling in cell adhesion. J Cell Sci. 112 ( Pt 20): 3415-20.
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