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  • I6785 - Anti-IRE1α antibody produced in rabbit

I6785 Sigma-Aldrich

Anti-IRE1α antibody produced in rabbit

~1 mg/mL, affinity isolated antibody, buffered aqueous solution

Synonym: Anti-Inositol-requiring enzyme-1, Anti-Serine/threonine-protein kinase/endoribonuclease IRE1, Anti-ERN1, Anti-Endoplasmic reticulum to nucleus signaling 1, Anti-IRE1, Anti-IRE1P

  •  NACRES NA.41



Related Categories Alphabetical Index, Antibodies, Antibodies for Cell Biology, Antibodies for Cell Stress, Antibodies to Oxidative Stress Proteins,
conjugate   unconjugated
clone   polyclonal
biological source   rabbit
application(s)   immunoprecipitation (IP): 2-5 μg using lysate of HEk-293T cells expressing human IRE1α
  indirect immunofluorescence: suitable
  western blot: 1-2 μg/mL using whole extract of HEK-293T cells expressing human IRE1α
species reactivity   human
mol wt   antigen ~110 kDa
form   buffered aqueous solution
shipped in   dry ice
storage temp.   −20°C
antibody form   affinity isolated antibody
Quality Level   200
antibody product type   primary antibodies
concentration   ~1 mg/mL
UniProt accession no.   O75460
Gene Information   human ... ERN1(2081)


General description

Inositol-requiring enzyme-1 (IRE1), consists of an N-terminal endoplasmic reticulum (ER) luminal domain, a transmembrane domain, and a C-terminal cytoplasmic region composed of a Ser/Thr protein kinase domain and a site-specific endoribonuclease (RNase) domain.

The gene ERN1 (endoplasmic reticulum to nucleus signaling 1) encodes an ER transmembrane kinase/endoribonuclease that is also referred to as IRE1α (inositol-requiring transmembrane kinase and endonuclease 1α). The serine-threonine protein kinase encoded by this gene is ubiquitously expressed in cells and tissues.


Anti-IRE1α antibody produced in rabbit has been used in western blotting and immunoprecipitation.

Physical form

Solution in 0.01 M phosphate buffered saline, pH 7.4, containing 15 mM sodium azide.


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.

Biochem/physiol Actions

ER transmembrane kinase/endoribonuclease serves as an ER stress sensor that initiates the splicing of the mRNA encoding X-box–binding protein 1 (XBP-1) upon activation. Spliced XBP-1 mRNA produces homeostatic transcription factor XBP1. Under ER stress, the RNase activity of IRE1α cleaves many ER-localized mRNAs associated with apoptosis. The cytosolic motif of the activated form of IRE1α associates with the adaptor protein TRAF2 (tumor necrosis factor (TNF)–associated factor 2). This complex activates the c-Jun N-terminal kinase (JNK) signaling pathway.

Inositol-requiring enzyme-1 (IRE1) is involved in the unfolded protein response (UPR), a transcriptional program induced by endoplasmic reticulum (ER) stress. The endonuclease activity of IRE1 autoregulates its mRNA and is required for the UPR. IRE1 senses the status of luminal protein folding in the ER via its N-terminal luminal domain. Presence of unfolded and misfolded proteins leads to dimerization, trans-autophosphorylation and activation of IRE1.

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable
Protocols & Articles


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