Thermo Fisher Scientific Phospho-IKB alpha (Tyr305) Polyclonal Antibody

Applications

Tested Dilution

Publications

Western Blot (WB)

1:100

-

Product Specifications

Species Reactivity

Human, Mouse, Rat

Host/Isotype

Rabbit / IgG

Class

Polyclonal

Type

Antibody

Immunogen

IkappaBalpha (Tyr-305) synthetic peptide (coupled to KLH) corresponding to amino acid residues around tyrosine 305 of human IkappaBalpha. This peptide sequence has low homology to other IkappaB proteins.

Conjugate

Unconjugated Unconjugated Unconjugated

Form

Liquid

Concentration

0.25 mg/mL

Purification

Antigen affinity chromatography

Storage buffer

PBS with 1mg/mL BSA, 50% glycerol

Contains

0.05% sodium azide

Storage conditions

-20° C, Avoid Freeze/Thaw Cycles

Shipping conditions

Wet ice

RRID

AB_2942938

Product Specific Information

This antibody was cross-adsorbed to phospho-tyrosine coupled to agarose then affinity purified using phospho-IkappaBalpha (Tyr-305) peptide (without carrier). The antibody detects a 38 kDa* protein on SDS-PAGE immunoblots of A431 and Jurkat cells treated with pervanadate, but does not detect this band in control cells.

Target Information

IkB-alpha is a 40 kDa protein that functions to inhibit NF- kappaB activity. The inhibition occurs via protein-protein interaction between I kappaB proteins and NF- kappaB dimers in the cytosol. The interaction of I kappa B-alpha with NF- kappaB masks the nuclear localization sequence of NF- kappaB, preventing NF- kappaB translocation to the nucleus. A variety of stimuli can activate gene expression by liberating NF- kappaB through the degradation of I kappaB alpha. These stimuli include the proinflammatory cytokines TNF- alpha and IL-1 beta, chemokines, PMA, growth factors, LPS, UV irradiation, viral infection, as well as various chemical and physical stresses. In humans, the gene is located on the q arm of chromosome 14. Activation of NFkB requires that IkB be phosphorylated on specific serine residues, which results in targeted degradation of IkB. IkB kinase alpha (IKK alpha), previously designated CHUK, interacts with IkB-alpha and specifically phosphorylates IkB-alpha on the sites that trigger its degradation Serines 32 and 36. IKK alpha appears to be critical for NFkB activation in response to proinflammatory cytokines. Phosphorylation of IkB by IKK alpha is stimulated by the NFkB inducing kinase (NIK), which itself is a central regulator for NFkB activation in response to TNF and IL-1. The functional IKK complex contains three subunits, IKK alpha, IKK beta and IKK gamma, and each appear to make essential contributions to IkB phosphorylation.

For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.