Anti-SHARPIN polyclonal antibody (CABT-BL6328)

Specifications


Host Species
Sheep
Antibody Isotype
IgG
Species Reactivity
Human
Immunogen
human SHARPIN (residues 1-326) [GST-tagged]
Conjugate
Unconjugated

Applications


Application Notes
WB: 1.0 µg/ml
IP: Use 5 µg/mg of cell extract
*Suggested working dilutions are given as a guide only. It is recommended that the user titrates the product for use in their own experiment using appropriate negative and positive controls.

Target


Alternative Names
SHARPIN; SHANK-associated RH domain interactor; sharpin; DKFZP434N1923; SIPL1; hSIPL1
Entrez Gene ID
UniProt ID

Citations


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Custom Antibody Labeling


We offer labeled antibodies using our catalogue antibody products and a broad range of intensely fluorescent dyes and labels including HRP, biotin, ALP, Alexa Fluor® dyes, DyLight® Fluor dyes, R-phycoerythrin (R-PE), at scales from less than 100 μg up to 1 g of IgG antibody. Learn More

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References


RING-between-RINGs-keeping the safety on loaded guns

EMBO JOURNAL

Authors: Dove, Katja K.; Klevit, Rachel E.

The 'RING-between-RING'-type E3 ubiquitin ligase HOIP acts via a novel RING/HECT-hybrid ubiquitin transfer mechanism and catalyses the formation of linear ubiquitin chains by non-covalently binding the acceptor ubiquitin. But in the absence of a binding partner, HOIP is auto-inhibited. This explains why assembly of either HOIP/HOIL-1L or HOIP/SHARPIN is required to catalyse linear chain formation.

The HOIL-1L ligase modulates immune signalling and cell death via monoubiquitination of LUBAC

NATURE CELL BIOLOGY

Authors: Fuseya, Yasuhiro; Fujita, Hiroaki; Kim, Minsoo; Ohtake, Fumiaki; Nishide, Akira; Sasaki, Katsuhiro; Saeki, Yasushi; Tanaka, Keiji; Takahashi, Ryosuke; Iwai, Kazuhiro

Fuseya et al. show that HOIL-1L catalyses monoubiquitination on all three LUBAC subunits, thereby impairing the function of LUBAC and its role in infection defence and dermatitis pathogenesis. The linear ubiquitin chain assembly complex (LUBAC), which consists of HOIP, SHARPIN and HOIL-1L, promotes NF-kappa B activation and protects against cell death by generating linear ubiquitin chains. LUBAC contains two RING-IBR-RING (RBR) ubiquitin ligases (E3), and the HOIP RBR is responsible for catalysing linear ubiquitination. We found that HOIL-1L RBR plays a crucial role in regulating LUBAC. HOIL-1L RBR conjugates monoubiquitin onto all LUBAC subunits, followed by HOIP-mediated conjugation of linear chains onto monoubiquitin, and these linear chains attenuate the functions of LUBAC. The introduction of E3-defective HOIL-1L mutants into cells augmented linear ubiquitination, which protected the cells against Salmonella infection and cured dermatitis caused by reduced LUBAC levels due to SHARPIN loss. Our results reveal a regulatory mode of E3 ligases in which the accessory E3 in LUBAC downregulates the main E3 by providing preferred substrates for autolinear ubiquitination. Thus, inhibition of HOIL-1L E3 represents a promising strategy for treating severe infections or immunodeficiency.

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