ER Stress Antibody Kit

ER Stress Antibody Sampler Kit

Cat. Num. AAA2550005

• Synonyms: ER Stress; ER Stress Antibody Sampler Kit; ER Stress antibody kit

Western Blot (WB)

(Western Blot analysis of Hela, PC-3 cells using HSP A5 Polyclonal Antibody at dilution of 1:2000.)

Western Blot (WB)

(Western Blot analysis of various cells using Calnexin Polyclonal Antibody at dilution of 1:1000.)

Western Blot (WB)

(Western Blot analysis of HEK-293 cells using PDI Monoclonal Antibody at dilution of 1:50000)

Western Blot (WB)

(Western Blot analysis of VEC cells using CHOP Polyclonal Antibody at dilution of 1:500.)

Immunohistochemistry (IHC)

(Immunohistochemistry of paraffin-embedded Human stomach tissue using PERK Polyclonal Antibody at dilution of 1:200.)

Related Product Information for ER Stress antibody kit

Description: The ER Stress Sampler Kit contains reagents to investigate ER stress within the cell. The kit contains enough primary and secondary antibodies to perform two Western blot experiments per primary antibody.

Background: Secretory and transmembrane proteins are synthesized on polysomes and translocate into the endoplasmic reticulum (ER) where they are often modified by the formation of disulfide bonds, amino-linked glycosylation and folding. The ER contains a pool of molecular chaperone proteins including calnexin, BiP and protein disulfide isomerase (PDI). Calnexin is an ER membrane, calcium-binding protein that retains newly synthesized glycoproteins inside the ER to ensure proper folding and quality control. Irregular protein folding within the ER increases BiP synthesis, which binds misfolded proteins to prevent them from forming aggregates and to assist them to refold properly. PDI catalyzes the formation and isomerization of disulfide bonds required for a protein to reach its native state. Studies have found that the resident ER protein endoplasmic oxidoreductin-1 (Ero1) provides oxidizing potential to the ER in Saccharomyces cerevisiae. Ero1-Lalpha is an ER membrane-associated N- glycoprotein that promotes oxidative protein folding. Disruptions of ER homeostasis leads to the accumulation of unfolded proteins. The ER has developed an adaptive mechanism called the unfolded protein response (UPR) to counteract compromised protein folding. This is regulated by proteins such as the membrane-bound transcription factor protease site 2 (MBTPS2) and the serine/threonine kinase IRE1. The PERK eIF2alpha kinase is an ER resident transmembrane protein that couples ER stress signals to translation inhibition. ER stress increases PERK activity, which phosphorylates eIF2alpha to reduce protein translation. PERK activation during ER stress correlates with autophosphorylation of its cytoplasmic kinase domain. Phosphorylation of PERK at Thr980 can serve as a marker for its activation status. During ER stress, the level of CHOP expression is elevated and CHOP functions to mediate programmed cell death.