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ERN1 / IRE1

endoplasmic reticulum to nucleus signaling 1

The endoribonuclease IRE1/ERN1 encodes the ER-to-nucleus signaling 1 protein, a human homolog of the yeast Ire1 gene product. In S. cerevisiae, as well as in human, this ER transmembrane IRE serine/threonine protein kinase monitors the status of unfolded proteins inside the ER lumen in response to stress. Activation of ERN1 leads to oligomerization, autophosphorylation, and proteolytic cleavage. The kinase and nuclease domains are then transported into the nucleus to function as a site-specific endoribonuclease. ERN1 activates JNK and other chaperone genes in response to stress.

Gene Name: endoplasmic reticulum to nucleus signaling 1
Family/Subfamily: Protein Kinase , IRE
Synonyms: ERN1, ER to nucleus signalling 1, Inositol-requiring enzyme 1, Inositol-requiring protein 1, Ire1-alpha, IRE1a, HIRE1p, IRE1, Inositol-requiring 1, IRE1P
Target Sequences: NM_001433 NP_001424.3 O75460

Publications (4)

1
Fluoride induces endoplasmic reticulum stress in ameloblasts responsible for dental enamel formation. Kubota K, Lee DH, Tsuchiya M, Young CS, Everett ET, Martinez-Mier EA, Snead ML, Nguyen L, Urano F, Bartlett JD. The Journal of biological chemistry. 2005 280:23194-202. [PubMed:15849362]
2
WFS1 is a novel component of the unfolded protein response and maintains homeostasis of the endoplasmic reticulum in pancreatic beta-cells. Fonseca SG, Fukuma M, Lipson KL, Nguyen LX, Allen JR, Oka Y, Urano F. The Journal of biological chemistry. 2005 280:39609-15. (ICC, IHC, WB; Mouse, Primate) [PubMed:16195229]
3
AIP1 is critical in transducing IRE1-mediated endoplasmic reticulum stress response. Luo D, He Y, Zhang H, Yu L, Chen H, Xu Z, Tang S, Urano F, Min W. The Journal of biological chemistry. 2008 283:11905-12. [PubMed:18281285] [PMC:PMC2335342]
4
Anti-apoptotic function of Xbp1 as an IL-3 signaling molecule in hematopoietic cells. Kurata M, Yamazaki Y, Kanno Y, Ishibashi S, Takahara T, Kitagawa M, Nakamura T. Cell death & disease. 2011 2:e118. [PubMed:21368889] [PMC:PMC3101701]
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Proteins (9)
Over-Expression Lysate (2)
Recombinant (7)
ERN1 / IRE1 (9)
SDS-PAGE (1)
No (9)
GST (1)
GST, N-terminus (1)
His-GST (1)
His-GST, N-terminus (1)
His-T7 (1)
Myc-DDK (Flag) (3)
Human (8)
293T Cells (1)
Baculovirus (3)
E. coli (1)
HEK 293 Cells (2)
Wheat Germ Extract (2)
Purified (3)
Low endotoxin level (3)
Biologically active (1)
ERN1 / IRE1 Protein
Select
Baculovirus
His-GST, N-terminus
SDS-PAGE
Biologically active
Less than 1.0 EU/µg protein (determined by LAL method).
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.
50 µg/$410
ERN1 / IRE1 Protein - Purified recombinant protein ERN1 was analyzed by SDS-PAGE gel and Coomassie Blue Staining
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HEK 293 Cells
Myc-DDK (Flag)
109.6 kDa
20 µg/$1,107
ERN1 / IRE1 Protein - Recombinant  Endoplasmic Reticulum To Nucleus Signalling 1 By SDS-PAGE
Select
E. coli
His-T7
33.3 kDa
10 µg/$283; 50 µg/$452; 100 µg/$722; 200 µg/$902; 1 mg/$2,016; 500 µg/$1,553; 5 mg/$3,151; 2 mg/$2,204
ERN1 / IRE1 Protein - 12.5% SDS-PAGE Stained with Coomassie Blue.
Select
Wheat Germ Extract
GST, N-terminus
10 µg/$479; 25 µg/$670
ERN1 / IRE1 Protein - Western validation with an anti-DDK antibody * L: Control HEK293 lysate R: Over-expression lysate
Select
293T Cells
Myc-DDK (Flag)
109.6 kDa
20 µg/$215
ERN1 / IRE1 Protein - 12.5% SDS-PAGE of human ERN1 stained with Coomassie Blue
Select
Wheat Germ Extract
GST
33 kDa
10 µg/$479; 25 µg/$670
ERN1 / IRE1 Protein - Western validation with an anti-DDK antibody * L: Control HEK293 lysate R: Over-expression lysate
Select
HEK 293 Cells
Myc-DDK (Flag)
109.6 kDa
100 µg/$710
Select
Baculovirus
His-GST
Less than 1.0 EU/µg protein (determined by LAL method).
86 kDa
50 µg/$707
Select
Baculovirus
None
Less than 1.0 EU/µg protein (determined by LAL method).
58.3 kDa
50 µg/$625
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The data on this page has been compiled from LifeSpan internal sources, the National Center for Biotechnology Information (NCBI), and The Universal Protein Resource (UniProt).