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IRS1 recombinant protein

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Catalog # MBS515371
Unit / Price
  0.02 mg  /  $260 +1 FREE 8GB USB
  0.05 mg  /  $415 +1 FREE 8GB USB
Product Name

IRS1, Recombinant Protein

Popular Item
Also Known As

IRS1 recombinant protein

Product Synonym Names
Insulin Receptor Substrate 1; HIRS-1
Product Synonym Gene Name
Research Use Only
For Research Use Only. Not for use in diagnostic procedures.
Sequence Positions
Sequence Length
Chromosome Location
Chromosome: 2; NC_000002.11 (227596033..227664545, complement). Location: 2q36
3D Structure
ModBase 3D Structure for P35568
Sf9 insect cells
50mM Tris-HCl, pH 7.5, 150mM NaCl, 10mM glutathione, 0.1mM EDTA, 0.25mM DTT, 0.1mM PMSF, 25% glycerol.
Recombinant Fusion Protein
Accession number
NM 005544
Tag Information
GST tag
Expression System
Sf9 insect cells using baculovirus
Source Note
Recombinant human IRS1 (600-1245) was expressed by baculovirus in Sf9 insect cells
Preparation and Storage
Store product at -70 degree C. For optimal storage, aliquot target into smaller quantities after centrifugation and store at recommended temperature. For most favorable performance, avoid repeated handling and multiple freeze/thaw cycles.
Other Notes
Small volumes of IRS1 recombinant protein vial(s) may occasionally become entrapped in the seal of the product vial during shipment and storage. If necessary, briefly centrifuge the vial on a tabletop centrifuge to dislodge any liquid in the container`s cap. Certain products may require to ship with dry ice and additional dry ice fee may apply.
Related Product Information for
IRS1 recombinant protein
Recombinant human IRS1 (600-1245) was expressed by baculovirus in Sf9 insect cells using an N-terminal GST tag.

Scientific Background: IRS1 is the substrate for the insulin tyrosine kinase receptor and is found in a variety of insulin-responsive cells and tissues. IRS1 protein has no intrinsic enzymatic activity but acts as a docking protein, via the SH2 domains, for mediating the insulin downstream signaling events. IRS1 has been shown to associate with the 14-3-3 family of proteins and this could play a role in the regulation of insulin sensitivity by interrupting the association between the insulin receptor and IRS1 (1). IRS1 may be associated with colorectal cancer and diet and related factors may affect the risk by modifying plasma insulin levels. Thus, the inter-individual variation in insulin signaling mediated by IRS1 may play a plausible role in the development of colorectal cancer (2).
Applications Tested/Suitable for IRS1 recombinant protein
Kinase Assay, Western Blot (WB)

The purity of IRS 1 was determined to be >8O% by densitometry.
Approx. MW 118kDa.
IRS1 recombinant protein SDS-PAGE image
NCBI/Uniprot data below describe general gene information for IRS1. It may not necessarily be applicable to this product.
NCBI Accession #
NCBI GenBank Nucleotide #
UniProt Primary Accession #
UniProt Related Accession #
Molecular Weight
~118 kDa
NCBI Official Full Name
Homo sapiens insulin receptor substrate 1 (IRS1), mRNA
NCBI Official Synonym Full Names
insulin receptor substrate 1
NCBI Official Symbol
NCBI Official Synonym Symbols
  [Similar Products]
NCBI Protein Information
insulin receptor substrate 1; IRS-1
UniProt Protein Name
Insulin receptor substrate 1
Protein Family
UniProt Gene Name
UniProt Synonym Gene Names
IRS-1  [Similar Products]
UniProt Entry Name
NCBI Summary for IRS1
This gene encodes a protein which is phosphorylated by insulin receptor tyrosine kinase. Mutations in this gene are associated with type II diabetes and susceptibility to insulin resistance. [provided by RefSeq, Nov 2009]
UniProt Comments for IRS1
Function: May mediate the control of various cellular processes by insulin. When phosphorylated by the insulin receptor binds specifically to various cellular proteins containing SH2 domains such as phosphatidylinositol 3-kinase p85 subunit or GRB2. Activates phosphatidylinositol 3-kinase when bound to the regulatory p85 subunit

By similarity. Ref.14 Ref.30

Subunit structure: Interacts with UBTF and PIK3CA

By similarity. Interacts (via phosphorylated YXXM motifs) with PIK3R1

By similarity. Interacts with ROCK1 and FER

By similarity. Interacts (via PH domain) with PHIP

By similarity. Interacts with GRB2

By similarity. Interacts with SOCS7. Interacts (via IRS-type PTB domain) with IGF1R and INSR (via the tyrosine-phosphorylated NPXY motif). Interacts with ALK. Interacts with EIF2AK2/PKR

By similarity. Ref.5 Ref.6 Ref.7 Ref.10 Ref.11 Ref.14

Post-translational modification: Serine phosphorylation of IRS1 is a mechanism for insulin resistance. Ser-312 phosphorylation inhibits insulin action through disruption of IRS1 interaction with the insulin receptor

By similarity. Phosphorylation of Tyr-896 is required for GRB2-binding

By similarity. Phosphorylated by ALK. Phosphorylated at Ser-270, Ser-307, Ser-636 and Ser-1101 by RPS6KB1; phosphorylation induces accelerated degradation of IRS1. Ref.8 Ref.9 Ref.10 Ref.15 Ref.19

Polymorphism: The Arg-971 polymorphism impairs the ability of insulin to stimulate glucose transport, glucose transporter translocation, and glycogen synthesis by affecting the PI3K/AKT1/GSK3 signaling pathway. The polymorphism at Arg-971 may contribute to the in vivo insulin resistance observed in carriers of this variant. Arg-971 could contribute to the risk for atherosclerotic cardiovascular diseases associated with non-insulin-dependent diabetes mellitus (NIDDM) by producing a cluster of insulin resistance-related metabolic abnormalities. In insulin-stimulated human endothelial cells from carriers of the Arg-971 polymorphism, genetic impairment of the IRS1/PI3K/PDPK1/AKT1 insulin signaling cascade results in impaired insulin-stimulated nitric oxide (NO) release and suggested that this may be a mechanism through which the Arg-971 polymorphism contributes to the genetic predisposition to develop endothelial dysfunction and cardiovascular disease. The Arg-971 polymorphism not only reduces phosphorylation of the substrate but allows IRS1 to act as an inhibitor of PI3K, producing global insulin resistance.

Involvement in disease: Diabetes mellitus, non-insulin-dependent (NIDDM) [MIM:125853]: A multifactorial disorder of glucose homeostasis caused by a lack of sensitivity to the body's own insulin. Affected individuals usually have an obese body habitus and manifestations of a metabolic syndrome characterized by diabetes, insulin resistance, hypertension and hypertriglyceridemia. The disease results in long-term complications that affect the eyes, kidneys, nerves, and blood vessels.Note: The gene represented in this entry may be involved in disease pathogenesis. Ref.24 Ref.25 Ref.27 Ref.30 Ref.31

Sequence similarities: Contains 1 IRS-type PTB domain.Contains 1 PH domain.
Product References and Citations for IRS1 recombinant protein
1. Ogihara, T. et al: 14-3-3 protein binds to insulin receptor substrate-1, one of the binding sites of which is in the phosphotyrosine binding domain. J. Biol. Chem. 272: 25267-25274, 1997.
2. Slattery, M.L. et al: Genetic variation in IGF1, IGFBP3, IRS1, IRS2 and risk of breast cancer in women living in outhwestern United States. Breast Cancer Res Treat. 2007.

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While every efforts were made to ensure the accuracy of the information provided in this datasheet, MyBioSource will not be liable for any omissions or errors contained herein. MyBioSource reserves the right to make changes to this datasheet at any time without prior notice.

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