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P2308 Sigma-Aldrich

Proteinase K from Tritirachium album

lyophilized powder, BioUltra, ≥30 units/mg protein, for molecular biology

Synonym: Endopeptidase K

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Description

Frequently Asked Questions

Frequently Asked Questions are available for this Product.

Biochem/physiol Actions

Proteinase K is a stable and highly reactive serine protease. Evidence from crystal and molecular structure studies indicates the enzyme belongs to the subtilisin family with an active-site catalytic triad (Asp39-His69-Ser224). It is stable in a broad range of environments: pH, buffer salts, detergents (SDS), and temperature. In the presence of 0.1-0.5% SDS, proteinase K retains activity and will digest a variety of proteins and nucleases in DNA preparations without compromising the integrity of the isolated DNA.

Packaging

1 g in poly bottle

10, 25, 100, 500 mg in poly bottle

5 mg in glass bottle

Unit Definition

One unit will hydrolyze urea-denatured hemoglobin to produce color equivalent to 1.0 μmole of tyrosine per min at pH 7.5 at 37 °C (color by Folin-Ciocalteu reagent).

Application

Useful for the proteolytic inactivation of nucleases during the isolation of DNA and RNA.
Removes endotoxins that bind to cationic proteins such as lysozyme and ribonuclease A.
Reported useful for the isolation of hepatic, yeast, and mung bean mitochondria
Determination of enzyme localization on membranes
Treatment of paraffin embedded tissue sections to expose antigen binding sites for antibody labeling.
Digestion of proteins from brain tissue samples for prions in Transmissible Spongiform Encephalopathies (TSE) research.

Legal Information

PicoGreen is a registered trademark of Life Technologies

Price and Availability


Available in ELITE Grade
Safety & Documentation

Safety Information

Symbol 
Signal word 
Danger
Hazard statements 
Personal Protective Equipment 
RIDADR 
NONH for all modes of transport
WGK Germany 
1
Protocols & Articles

Protocols

Enzymatic Assay of Proteinase K (EC 3.4.21.64)

This procedure may be used for determination of Proteinase K activity using hemoglobin as the substrate. It is not used to assay the activity of immobilized Proteinase K products, such as Catalog Num...
Keywords: Immobilization

Experienced User Protocol | GenElut Mammalian Genomic DNA Miniprep Kit

For experienced users, an abbreviated protocol is listed below. For data, images, troubleshooting and other information, please see the full length protocol page.
Keywords: PAGE

GenElute Bacterial Genomic DNA Kit Protocol

Sigma's GenElute™ Bacterial Genomic DNA Kit provides a simple and convenient way to isolate pure DNA from a variety of cultured bacteria. The kit contains all of the reagents needed to isolate and pu...
Keywords: Amplification, Anticoagulants, Cell disruption, Centrifugation, Degradations, Digestions, Evaporation, Molecular biology, Nucleic acid denaturation, Phase transitions, Polymerase chain reaction, Precipitation

GenElute Bacterial Genomic DNA Kit, Experienced User Protocol

For experienced users, an abbreviated protocol is listed below. For data, images, troubleshooting and other information.

GenElute Mammalian Genomic DNA Miniprep Kit Protocol

Sigma’s GenElute Mammalian Genomic DNA Miniprep Kit provides a simple and convenient way to isolate pure genomic DNA from a variety of cultured cells, tissues (including rodent tails), and fresh whol...
Keywords: AGE, Amplification, Anticoagulants, Cell disruption, Centrifugation, DNA purification, Degradations, Digestions, Electrophoresis, Evaporation, Gel electrophoresis, Molecular biology, Nucleic acid denaturation, Phase transitions, Polymerase chain reaction, Precipitation, Purification, Sample preparations, Sequencing

GenElute™ Blood Genomic DNA Kit Protocol (NA2010, NA2020)

Sigma’s GenElute™ Blood Genomic DNA Kit provides a simple and convenient way to isolate pure genomic DNA from fresh or aged (older than 24 hours) whole blood. The kit combines the advantages of silic...
Keywords: AGE, Addition reactions, Amplification, Anticoagulants, Cell disruption, Centrifugation, Digestions, Electrophoresis, Evaporation, Gel electrophoresis, Molecular biology, Nucleic acid denaturation, Phase transitions, Polymerase chain reaction, Precipitation, Purification, Sequencing

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Application Index | Enzyme Index | Substrate Index | Inhibitor Index | Cofactor Index | Lectin Index
Keywords: Cell signaling, Diagnostic, Drug discovery, Molecular biology

Peer-Reviewed Papers
15

References

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