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HPA011351 Sigma-Aldrich

Anti-SPINK5 antibody produced in rabbit

Antibody Enhanced Validation

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

Synonym: Anti-Lympho-epithelial Kazal-type-related inhibitor antibody produced in rabbit, Anti-LEKTI antibody produced in rabbit, Anti-Serine protease inhibitor Kazal-type 5 precursor antibody produced in rabbit



Related Categories Alphabetical Index, Antibodies, Prestige Antibodies, Prestige Polyclonal Antibodies, Primary Antibodies,
conjugate   unconjugated
clone   polyclonal
biological source   rabbit
application(s)   immunofluorescence: 1-4 μg/mL
  immunohistochemistry: 1:200- 1:500
species reactivity   human
enhanced validation   orthogonal RNAseq
Learn more about Antibody Enhanced Validation
form   buffered aqueous glycerol solution
shipped in   wet ice
storage temp.   −20°C
antibody form   affinity isolated antibody
antibody product type   primary antibodies
grade   Prestige Antibodies® Powered by Atlas Antibodies
UniProt accession no.   Q9NQ38
Gene Information   human ... SPINK5(11005)


General description

SPINK5 (serine protease inhibitor Kazal-type 5) is a secreted multi-domain serine protease inhibitor. It is expressed in hair follicles in the inner root sheets and in the epidermis in the granular layer. This protein contains 15 serine protease inhibitor domains. It is composed of 1064 amino acids, and has a signal peptide. It is synthesized as a pro-protein, which is cleaved into different isoforms. Three isoforms of this protein exist- a short isoform with only the first 13 domains, the 15 domain isoform, and a long isoform with a 30 amino acid stretch inserted between domains 13 and 14. The molecular weight of 15 domain isoform is ~120kDa. SPINK5 gene is localized to human chromosome 5q32, and is made of 33 exons.


Serine protease inhibitor Kazal-type 5 precursor recombinant protein epitope signature tag (PrEST)


All Prestige Antibodies Powered by Atlas Antibodies are developed and validated by the Human Protein Atlas (HPA) project (www.proteinatlas.org)and as a result, are supported by the most extensive characterization in the industry.

The Human Protein Atlas project can be subdivided into three efforts: Human Tissue Atlas, Cancer Atlas, and Human Cell Atlas. The antibodies that have been generated in support of the Tissue and Cancer Atlas projects have been tested by immunohistochemistry against hundreds of normal and disease tissues and through the recent efforts of the Human Cell Atlas project, many have been characterized by immunofluorescence to map the human proteome not only at the tissue level but now at the subcellular level. These images and the collection of this vast data set can be viewed on the Human Protein Atlas (HPA) site by clicking on the Image Gallery link. To view these protocols and other useful information about Prestige Antibodies and the HPA, visit sigma.com/prestige.

Physical form

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

Legal Information

Prestige Antibodies is a registered trademark of Sigma-Aldrich Co. LLC

Biochem/physiol Actions

SPINK5 (serine protease inhibitor Kazal-type 5) inactivates kallikrein (KLK)5, KLK7, and KLK14, which are epidermal proteases. KLKs are proteases related to desquamation, and SPINK5 is involved in the negative regulation of KLKs, as well as other proteases. Therefore, for normal skin barrier function and desquamation, a balance between KLKs and SPINK5 is essential. Mutations in this gene are associated with Comèl-Netherton syndrome, which is an autosomal recessive disorder. It is characterized by abnormalities in the hair shaft, congenital ichthyosis, and atopic diathesis. Loss of SPINK5 activity leads to increased corneodesmosomal component desmoglein-1 (DSG1) degradation, resulting in aberrant stratum corneum detachment. SPINK5 420K variant is responsible for changes in the proteolytic activation of SPINK5, which increases the likelihood of atopic dermatitis.


Corresponding Antigen APREST70808.

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 


Certificate of Analysis


Certificate of Origin

Protocols & Articles


Antibody Basics

Immunoglobulins (Igs) are produced by B lymphocytes and secreted into plasma. The Ig molecule in monomeric form is a glycoprotein with a molecular weight of approximately 150 kDa that is shaped more ...
Keywords: Affinity chromatography, Centrifugation, Chromatography, Digestions, Direct immunofluorescence, Gene expression, High performance liquid chromatography, Immunofluorescence, Ion Exchange, Microscopy, Precipitation, Purification, Rheumatology, Scanning electron microscopy


Prestige Antibody® Immunofluorescence Procedure

Prestige Antibodies® have been used for subcellular localization studies by immunocytochemistry (ICC) - immunofluorescence (IF) using the protocol described below. In addition to the primary antibodi...
Keywords: Immunocytochemistry, Immunofluorescence, Immunostaining, Sample preparations

Prestige Antibody® Immunohistochemistry Procedure

Prestige Antibodies® developed for immunohistochemistry based expression profiling are recommended to be used according to the standard IHC staining protocol described below.
Keywords: Buffers, Dehydration reaction, Gene expression, Hydration reaction, Immunohistochemistry, Immunostaining, Tissue microarrays

Prestige Antibody® Protein Immunoblotting Procedure

Prestige Antibodies® recommended for Western Blot are recommended to be used according to the standard WB protocol described below. Western blot standard protocol optimized for
Keywords: Catalytic combustion detector, Electrophoresis, Gene expression, Sample preparations, Western blot

Prestige Antigens™-Blocking Protocol

Prestige Antigens and the corresponding Prestige Antibodies are recommended to be used according to the standard blocking protocol described below.
Keywords: Immunocytochemistry, Immunohistochemistry, Immunostaining, Titrations, Western blot

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