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SRP5012

Sigma-Aldrich

CDK9/CyclinK, active, GST tagged human

PRECISIO® Kinase, recombinant, expressed in baculovirus infected Sf9 cells, ≥70% (SDS-PAGE), buffered aqueous glycerol solution

Synonym(s):

C-2k, CCNK, CDC2L4, CPR4, MGC9113, PITALRE, TAK

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About This Item

UNSPSC Code:
12352200
NACRES:
NA.32

recombinant

expressed in baculovirus infected Sf9 cells

product line

PRECISIO® Kinase

Assay

≥70% (SDS-PAGE)

form

buffered aqueous glycerol solution

specific activity

15-21 nmol/min·mg

mol wt

~67 kDa (CyclinK)
~68 kDa (CDK9)

NCBI accession no.

shipped in

dry ice

storage temp.

−70°C

Gene Information

General description

CDK9/CyclinK, active, GST tagged human comprises recombinant full-length human CDK9 and cyclinK proteins co-expressedin Sf9 insect cells with an N-terminal GST tag. Cyclin-dependent protein kinase 9 (CDK9)/CyclinK is a member of the cyclin-dependent protein kinase (CDK) family. CDK9 is a component of the multiprotein complex mitogen-activated protein kinase 7 and transcription elongation factor β (TAK/P-TEFβ).

Biochem/physiol Actions

CDKs are closely related to yeast CDk1, cdc28 and cdc2 and arean important regulators of the cell cycle. CDK9 can modulate RNA polymerase II-directed transcription by phosphorylating the C-terminal domain of the largest subunit of RNA polymerase II. CDK9 forms a complex with and is regulated by its regulatory subunit cyclin T or cyclin K. CDK9 also interacts with the human immune deficiency virus 1 (HIV-1) transactivating regulatory protein (Tat) protein, which suggests a possible involvement of this protein in AIDS.

Physical form

Supplied in 50mM Tris-HCl, pH 7.5, 150mM NaCl, 10mM glutathione, 0.1mM EDTA, 0.25mM DTT, 0.1mM PMSF, 25% glycerol.

Preparation Note

after opening, aliquot into smaller quantities and store at -70 °C. Avoid repeating handling and multiple freeze/thaw cycles

Legal Information

PRECISIO is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class Code

10 - Combustible liquids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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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Ranadip Mandal et al.
Cellular and molecular life sciences : CMLS, 79(12), 597-597 (2022-11-19)
Cervical cancer is the fourth most frequently diagnosed and fatal gynecological cancer. 15-61% of all cases metastasize and develop chemoresistance, reducing the 5-year survival of cervical cancer patients to as low as 17%. Therefore, unraveling the mechanisms contributing to metastasis
Phosphorylation of the RNA polymerase II carboxyl-terminal domain by CDK9 is directly responsible for human immunodeficiency virus type 1 Tat-activated transcriptional elongation
Kim YK, et al.
Molecular and Cellular Biology, 22(13), 4622-4637 (2002)
The 7SK small nuclear RNA inhibits the CDK9/cyclin T1 kinase to control transcription
Yang Z, et al.
Nature, 414(6861), 317-322 (2001)
Z Yang et al.
Nature, 414(6861), 317-322 (2001-11-20)
The human positive transcription elongation factor P-TEFb, consisting of a CDK9/cyclin T1 heterodimer, functions as both a general and an HIV-1 Tat-specific transcription factor. P-TEFb activates transcription by phosphorylating RNA polymerase (Pol) II, leading to the formation of processive elongation
F Bullrich et al.
Cancer research, 55(6), 1199-1205 (1995-03-15)
Orderly progression through the cell cycle requires sequential activation and inactivation of cyclin-dependent kinases (cdks). This is achieved in part through the association of cdks with positive regulators called cyclins and inactivation of cyclin-cdk complexes by a rapidly growing number

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