SIL1 (SIL1 nucleotide exchange factor) is a glycoprotein present in the membrane of endoplasmic reticulum. It is composed of an N-terminal endoplasmic reticulum (ER) target zone, four armadillo repeats (ARMs), two N-linked glycosylation sites and a C-terminal putative ER retention tetrapeptide. It is expressed in the pancreatic β cells and helps in several activities including islet insulin content, islet sizing, glucose tolerance, and glucose-stimulated insulin secretion in vivo.
Nucleotide exchange factor SIL1 precursor recombinant protein epitope signature tag (PrEST)
All Prestige Antibodies Powered by Atlas Antibodies are developed and validated by the Human Protein Atlas (HPA) project (www.proteinatlas.org)and as a result, are supported by the most extensive characterization in the industry.
The Human Protein Atlas project can be subdivided into three efforts: Human Tissue Atlas, Cancer Atlas, and Human Cell Atlas. The antibodies that have been generated in support of the Tissue and Cancer Atlas projects have been tested by immunohistochemistry against hundreds of normal and disease tissues and through the recent efforts of the Human Cell Atlas project, many have been characterized by immunofluorescence to map the human proteome not only at the tissue level but now at the subcellular level. These images and the collection of this vast data set can be viewed on the Human Protein Atlas (HPA) site by clicking on the Image Gallery link. To view these protocols and other useful information about Prestige Antibodies and the HPA, visit sigma.com/prestige.
SIL1 (SIL1 nucleotide exchange factor) is involved in β cell function. During protein folding, it binds to HSP (heat shock protein) to acts as an adenine nucleotide exchange factor. It binds to the ADP-bound HSPA5, which further facilitates ADP release as well as the release of HSPA5 from its substrates. As a result, ATP is attached with the HSPA5. Thus, SIL1 stabilizes proper folding of newly synthesized proteins and degrades those proteins that fail to mature properly. Mutations in SIL1 cause cerebellar ataxia, chronic myopathy, cataracts, delayed motor development and intellectual disability, collectively known as Marinesco-Sjögren syndrome.
Features and Benefits
Prestige Antibodies® are highly characterized and extensively validated antibodies with the added benefit of all available characterization data for each target being accessible via the Human Protein Atlas portal linked just below the product name at the top of this page. The uniqueness and low cross-reactivity of the Prestige Antibodies® to other proteins are due to a thorough selection of antigen regions, affinity purification, and stringent selection. Prestige antigen controls are available for every corresponding Prestige Antibody and can be found in the linkage section.
Every Prestige Antibody is tested in the following ways:
- IHC tissue array of 44 normal human tissues and 20 of the most common cancer type tissues.
- Protein array of 364 human recombinant protein fragments.
Solution in phosphate-buffered saline, pH 7.2, containing 40% glycerol and 0.02% sodium azide
Prestige Antibodies is a registered trademark of Sigma-Aldrich Co. LLC
Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.