Insulin Receptor Protein, Human, Recombinant (His & GST Tag)

Product Specifications

Background

INSR (Insulin receptor), also known as CD22, is a transmembrane receptor that is activated by insulin. INSR belongs to the protein kinase superfamily and exists as a tetramer consisting of two alpha subunits and two beta subunits linked by disulfide bonds. The alpha and beta subunits are encoded by a single INSR gene, and the beta subunits pass through the cellular membrane. As the receptor for insulin with tyrosine-protein kinase activity, INSR associates with downstream mediators upon binding to insulin, including IRS1 (insulin receptor substrate 1) and phosphatidylinositol 3'-kinase (PI3K) . IRS-1 binding and phosphorylation eventually lead to an increase in the high-affinity glucose transporter (Glut4) molecules on the outer membrane of insulin-responsive tissues. INSR isoform long and isoform short are expressed in the peripheral nerve, kidney, liver, striated muscle, fibroblasts and skin, and is found as a hybrid receptor with IGF1R which also binds IGF1 in muscle, heart, kidney, adipose tissue, skeletal muscle, hepatoma, fibroblasts, spleen, and placenta. Defects in Insulin Receptor/INSR are the cause of Rabson-Mendenhall syndrome (Mendenhall syndrome), insulin resistance (Ins resistance), leprechaunism (Donohue syndrome), and familial hyperinsulinemic hypoglycemia 5 (HHF5) . It may also be associated with noninsulin-dependent diabetes mellitus (NIDDM) .

Overview

A DNA sequence encoding the human INSR isoform long (NP_000199.2) cytoplasmic domain (Gly 989-Ser 1382) was fused with the N-terminal polyhistidine-tagged GST tag at the N-terminus.

Synonyms

CD220 Protein, Human; HHF5 Protein, Human; Insulin Receptor Protein, Human

Gene Name

Insulin receptor

Expression System

Baculovirus-Insect Cells

Tag

N-GST & His

Field of Research

Receptor Tyrosine Kinases (RTKs)

Endotoxin

< 1.0 EU per μg of the protein as determined by the LAL method.

Purity

> 92 % as determined by SDS-PAGE.

Activity

The specific activity was determined to be 45 nmol/min/mg using Poly (Ala, Glu, Lys, Tyr) 6:2:5:1 as substrate.

Form

Liquid

Buffer

Supplied as sterile 50mM Tris, 100mM NaCl, pH 7.4, 20% glycerol, 0.3mM DTT Please contact us for any concerns or special requirements. Please refer to the specific buffer information in the hard copy of CoA.

Function

Kinase proteins, Growth Factor proteins, CD Molecule proteins, Receptor Proteins, Enzyme Proteins, Cytokine Proteins

Molecular Weight

The recombinant human INSR (989-1382) /GST chimera consists of 631 amino acids and has a calculated molecular mass of 72.3 KDa. It migrates as an approximately 70 KDa band in SDS-PAGE under reducing conditions.

Storage Conditions

Kinases are highly recommended to be shipped at frozen temperature with blue ice or dry ice. Shipment made at ambient temperature may seriously affect the activity of the ordered products. Stable for 1 year at -20°C or below from date of shipment. For maximum recovery of product, centrifuge the original vial after thawing and opening the cap. For long-term storage, aliquot and store at -20°C or below. Avoid repeated freeze-thaw cycles.