IRE1 Protein, Human, Recombinant (aa 465-977, His & GST Tag)

Product Specifications

Background

Endoplasmic reticulum stress and hypoxia are necessary components of malignant tumors growth and suppression of ERN1 (from endoplasmic reticulum to nuclei-1) signalling pathway, which is linked to the apoptosis and cell death processes, significantly decreases proliferative processes. An enhanced expression of TP53 gene in ERN1 knockdown glioma cells correlates with the decreased level of ubiquitin ligase MDM2 and increased expression level of USP7 which deubiquitinates TP53 and MDM2 and induces TP53-dependent cell growth repression and apoptosis. Thus, the expression of genes encoding TP53 and related to TP53 factors depends upon the endoplasmic reticulum stress signaling as well as on hypoxia, and correlates with suppression of glioma growth under ERN1 knockdown. The dependence of insulin-like growth binding proteins as well as IGF2BP3 and HTRA1 gene expressions in U87 glioma cells on ERN1 signaling enzyme function and hypoxia, indicating its participation in the regulation of metabolic and proliferative processes via IGF/INS receptors, because endoplasmic reticulum stress is an important component of tumor growth and metabolic diseases.

Overview

A DNA sequence encoding the human ERN1 isoform 1 (O75460-1) cytoplasmic domain (Pro 465-Leu 977) was fused with the N-terminal polyhistidine-tagged GST tag at the N-terminus.

Synonyms

HIRE1p Protein, Human; IRE1 Protein, Human; IRE1a Protein, Human; IRE1P Protein, Human

Gene Name

Endoplasmic reticulum to nucleus signaling 1

UniProt

O75460-1

Expression System

Baculovirus-Insect Cells

Tag

N-GST & His

Endotoxin

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

Purity

> 80 % as determined by SDS-PAGE.

Activity

The specific activity was determined to be 5 nmol/min/mg using MBP as substrate

Form

Liquid

Buffer

Supplied as sterile 20mM Tris, 500mM NaCl, 10% glycerol, pH 7.4 Please contact us for any concerns or special requirements. Please refer to the specific buffer information in the hard copy of CoA.

Function

Enzyme Proteins

Molecular Weight

The recombinant human ERN1/GST chimera consists of 750 amino acids and has a calculated molecular mass of 86 kDa. It migrates as an approximately 90 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.