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K0253

Sigma-Aldrich

Keratin from human epidermis

aqueous solution

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About This Item

CAS Number:
MDL number:
UNSPSC Code:
12352202
NACRES:
NA.61

biological source

human epidermis

Assay

≥90% (SDS-PAGE)

form

urea solution

technique(s)

ELISA: suitable

UniProt accession no.

storage temp.

2-8°C

Gene Information

human ... KRT1(3848)

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General description

Keratins are characteristic intermediate filament proteins of the epithelia. In human, keratin is classified into type I and type II. About 54 genes encodes for the keratin protein. The keratin 1 (KRT1) gene is mapped to human chromosome 12q13.13. It is the primary component of hair, skin and nails.

Application

Keratin from human epidermis has been used:
  • as an analyte and a cross-reactant in the antibody-immobilized chip for testing selectivity coefficients
  • as a standard in extracellular matrix (ECM) protein in in vitro protein degradation assays.
  • asa a standard in enzyme linked immunosorbent assay (ELISA)

Biochem/physiol Actions

Keratins are important for the mechanical stability and integrity of epithelial cells and tissues. Some keratins also have regulatory functions and are involved in intracellular signaling pathways, e.g. protection from stress, wound healing, and apoptosis. This diverse group of cytoskeletal scaffolding proteins form intermediate filament networks which provide structural support to keratinocytes that maintain the integrity of the skin. Expression of keratin genes is usually regulated by differentiation of the epidermal cells within the stratifying squamous epithelium.

Physical form

Solution in 8 M urea, 50 mM Tris, 0.1 M β-mercaptoethanol and 0.1% sodium azide, pH 8.4

Pictograms

Exclamation mark

Signal Word

Warning

Hazard Statements

Hazard Classifications

Skin Sens. 1

Storage Class Code

10 - Combustible liquids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


Certificates of Analysis (COA)

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A Elefante et al.
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B B Hogans et al.
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To determine whether activation of protein kinase C is involved in the proliferation of interleukin-3 (IL-3) -dependent cells, we examined the effect of tumor-promoting phorbol esters on the in vitro proliferation of the IL-3-dependent cell lines FD and DA-1. The
D Sakthisekaran et al.
Biochemistry international, 21(1), 117-134 (1990-01-01)
The toxic nature of the secondary metabolite has been studied in rats. Changes in the concentration of a few key enzymes in carbohydrate metabolism have also been studied. In this, liver aldolase concentration was found to be significantly lowered. Since
Luis Requena et al.
JAMA dermatology, 149(4), 459-465 (2013-05-30)
Epithelioid sarcomalike (pseudomyogenic) hemangioendothelioma (ES-H) is a recently described and little-known vascular neoplasm that frequently presents with dermatologic lesions. Histopathologic characterization includes sheets or fascicles of plump, spindled and epithelioid, rhabdomyoblastlike neoplastic cells involving the dermis and often extending to
A Pena et al.
Optics express, 13(16), 6268-6274 (2005-08-08)
We recorded one-photon excited fluorescence (1PEF) and two-photon excited fluorescence (2PEF) spectra of purified keratin from human epidermis, and determined the action cross section of this endogenous chromophore. We used this spectroscopic analysis to analyse multiphoton images of skin biopsies

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