Recombinant Human VSTM2A His-tag Protein, CF Summary
Ser25-Phe244, with a C-terminal 6-His tag
CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.
In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.
|Formulation||Lyophilized from a 0.2 μm filtered solution in PBS.|
|Reconstitution||Reconstitute at 200 μg/mL in PBS.|
|Shipping||The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.|
|Stability & Storage:||
Recombinant Human VSTM2A (Catalog # 10037-VT) inhibits IFN-gamma secretion by human peripheral blood mononuclear cells in the presence ofanti-CD3 antibody. The ED50 for this effect is 1-10 μg/mL.
2 μg/lane of Recombinant Human VSTM2A was resolved with SDS-PAGE underreducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Bluestaining, showing bands at 38-42 kDa.
V-set and transmembrane domain-containing protein 2A (VSTM2A) is a secreted glycoprotein that is expressed by committed preadipocytes. N-linked glycosylation is crucial for its secretion, but not for preadipocyte cell differentiation activity. It is expressed during adipocyte development and its over-expression promotes adipogenesis (1). VSTM2A is highly expressed in the brain and Vstm2a was identified as an enigmatic gene that is highly produced in mouse brain (1, 2). A positive association has been observed between Vstm2a and Pparg2. VSTM2A plays a role in the regulation of the early stage of white and brown preadipocyte cell differentiation. It promotes adipogenic commitment of preadipocytes by increasing gene expression of the transcription factor PPARG in a BMP4-dependent signaling pathway (1, 3). In humans, two isoforms (1 and 2) exist due to alternative splicing. Human VSTM2A is synthesized either as a 236 amino acid (aa) (Isoform 1) or a 244 aa (Isoform 2) precursor that contains a 24 aa signal sequence followed by the VSTM2A domain. Human Isoform 2 VSTM2A shares 78% aa sequence identity with mouse and rat VSTM2A. Our in house data show that VSTM2A inhibits the human T cell activation, including anti-CD3 induced IL-2 and IFN-gamma secretion, and T cell proliferation.
- Secco, B. et al. (2017) Cell Rep. 18:93.
- Pandey, A.K. et al. (2014) PloS One. 9:e88889.
- Berry, D.C. et al. (2013) Development. 140:3939.
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