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Key Documents

HPA017737

Sigma-Aldrich

Anti-PI3 antibody produced in rabbit

enhanced validation

Prestige Antibodies® Powered by Atlas Antibodies, affinity isolated antibody, buffered aqueous glycerol solution

Synonym(s):

Anti-ESI, Anti-Elafin precursor, Anti-Elastase-specific inhibitor, Anti-Peptidase inhibitor 3, Anti-Protease inhibitor WAP3, Anti-SKALP, Anti-Skin-derived antileukoproteinase, Anti-WAP four- disulfide core domain protein 14

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About This Item

UNSPSC Code:
12352203
Human Protein Atlas Number:
NACRES:
NA.41

biological source

rabbit

conjugate

unconjugated

antibody form

affinity isolated antibody

antibody product type

primary antibodies

clone

polyclonal

product line

Prestige Antibodies® Powered by Atlas Antibodies

form

buffered aqueous glycerol solution

species reactivity

human

enhanced validation

orthogonal RNAseq
Learn more about Antibody Enhanced Validation

technique(s)

immunohistochemistry: 1:2500- 1:5000

immunogen sequence

KGQDTVKGRVPFNGQDPVKGQVSVKGQDKVKAQEPVKGPVSTKPGSCPIILIRCAMLNPPNRCLKDTDCPGIKKCCEGSCGMA

UniProt accession no.

shipped in

wet ice

storage temp.

−20°C

target post-translational modification

unmodified

Gene Information

human ... PI3(5266)

General description

Peptidase inhibitor 3 (PI3) is an endogenous serine protease inhibitor which is expressed in the epithelium of the gastrointestinal tract. It is a 9.9kDa protein consisting of 95 amino acids. PI3 belongs to the chelonianin family of proteins and the gene encoding it is localized on chromosome 20.

Immunogen

Elafin precursor recombinant protein epitope signature tag (PrEST)

Application

Anti-PI3 antibody produced in rabbit, a Prestige Antibody, is developed and validated by the Human Protein Atlas (HPA) project . Each antibody is tested by immunohistochemistry against hundreds of normal and disease tissues. These images can be viewed on the Human Protein Atlas (HPA) site by clicking on the Image Gallery link. The antibodies are also tested using immunofluorescence and western blotting. To view these protocols and other useful information about Prestige Antibodies and the HPA, visit sigma.com/prestige.

Biochem/physiol Actions

Peptidase inhibitor 3 (PI3) has an inhibitory effect against various elastases and proteinases. It is a substrate of tissue transglutaminase 2 (TG-2), which has a cross-linking activity. In cardiovascular, respiratory and colonic inflammation, PI3 shows anti-inflammatory effects and barrier modifying properties. It is called an “alarm” antiproteinase, since it is secreted at the sites of inflammation by the same stimuli that causes initial inflammatory response. It has been shown that PI3 is overexpressed in basal-like breast cancer tumors and high-grade serous ovarian carcinoma. PI3 may also act as a marker of renal inflammation and injury.

Features and Benefits

Prestige Antibodies® are highly characterized and extensively validated antibodies with the added benefit of all available characterization data for each target being accessible via the Human Protein Atlas portal linked just below the product name at the top of this page. The uniqueness and low cross-reactivity of the Prestige Antibodies® to other proteins are due to a thorough selection of antigen regions, affinity purification, and stringent selection. Prestige antigen controls are available for every corresponding Prestige Antibody and can be found in the linkage section.

Every Prestige Antibody is tested in the following ways:
  • IHC tissue array of 44 normal human tissues and 20 of the most common cancer type tissues.
  • Protein array of 364 human recombinant protein fragments.

Linkage

Corresponding Antigen APREST70807

Physical form

Solution in phosphate-buffered saline, pH 7.2, containing 40% glycerol and 0.02% sodium azide

Legal Information

Prestige Antibodies is a registered trademark of Merck KGaA, Darmstadt, Germany

Disclaimer

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.

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Storage Class

10 - Combustible liquids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, multi-purpose combination respirator cartridge (US)


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Protease inhibitors derived from elafin and SLPI and engineered to have enhanced specificity towards neutrophil serine proteases
Zani ML, et al.
Protein Science, 18(3), 579-594 (2009)
Adam Clauss et al.
The Biochemical journal, 368(Pt 1), 233-242 (2002-11-06)
A locus containing 14 genes, encoding protein domains that have homology with whey acidic protein (WAP), has been identified in a region of 678 kb on human chromosome 20q12-13.1. Among them are genes of the known or postulated protease inhibitors
Paula Tejera et al.
American journal of respiratory cell and molecular biology, 51(2), 262-272 (2014-03-13)
Elafin (peptidase inhibitor 3 [PI3]) and its biologically active precursor, pre-elafin, are neutrophil serine proteinase inhibitors with an important role in preventing excessive tissue injury during inflammatory events. Recently, we reported an association between single-nucleotide polymorphism (SNP) rs2664581 in the
Jiani Wang et al.
PloS one, 15(4), e0231796-e0231796 (2020-04-15)
Antimicrobial peptide expression is associated with disease activity in inflammatory bowel disease (IBD) patients. IBD patients have abnormal expression of elafin, a human elastase-specific protease inhibitor and antimicrobial peptide. We determined elafin expression in blood, intestine, and mesenteric fat of
Heather J Galipeau et al.
The American journal of gastroenterology, 109(5), 748-756 (2014-04-09)
Elafin, an endogenous serine protease inhibitor, modulates colonic inflammation. We investigated the role of elafin in celiac disease (CD) using human small intestinal tissues and in vitro assays of gliadin deamidation. We also investigated the potential beneficial effects of elafin

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