2. Recombinant Proteins
  3. Enzymes & Regulators
  4. Transferases (EC 2) Serine/Threonine Kinase Proteins
  5. Cyclin-Dependent Kinases (CDKs)
  6. CDK9-CCNK Heterodimer Protein, Human (Sf9, GST, FLAG)

CDK9-CCNK Heterodimer Protein, Human (Sf9, GST, FLAG)

Cat. No.: HY-P701375
Handling Instructions

The CDK9 protein plays a central role in transcriptional regulation, promoting the transition from ineffective to efficient elongation by phosphorylating POLR2A, SUPT5H, and RDBP. As part of the CDK9/cyclin-T complex, it participates in phosphorylation events affecting EP300, MYOD1, RPB1/POLR2A, AR, DSIF, and NELFE. CDK9-CCNK Heterodimer Protein, Human (Sf9, GST, FLAG) is a recombinant protein dimer complex containing human-derived CDK9-CCNK Heterodimer protein, expressed by Sf9 insect cells , with N-Flag, N-GST labeled tag.

For research use only. We do not sell to patients.

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Description

The CDK9 protein plays a central role in transcriptional regulation, promoting the transition from ineffective to efficient elongation by phosphorylating POLR2A, SUPT5H, and RDBP. As part of the CDK9/cyclin-T complex, it participates in phosphorylation events affecting EP300, MYOD1, RPB1/POLR2A, AR, DSIF, and NELFE. CDK9-CCNK Heterodimer Protein, Human (Sf9, GST, FLAG) is a recombinant protein dimer complex containing human-derived CDK9-CCNK Heterodimer protein, expressed by Sf9 insect cells , with N-Flag, N-GST labeled tag.
Background

The CDK9ic protein emerges as a central player in the intricate regulation of transcription, orchestrating a diverse range of cellular processes. As a pivotal member of the cyclin-dependent kinase pair (CDK9/cyclin-T) complex, also known as positive transcription elongation factor b (P-TEFb), it facilitates the transition from abortive to productive elongation by phosphorylating the C-terminal domain (CTD) of the large subunit of RNA polymerase II (POLR2A), SUPT5H, and RDBP. This complex, inactive in the 7SK small nuclear ribonucleoprotein (snRNP) complex form, engages in phosphorylation events targeting EP300, MYOD1, RPB1/POLR2A, AR, and the negative elongation factors DSIF and NELFE. Beyond its role in transcription, CDK9-CCNK regulates cytokine-inducible transcription networks, promoting RNA synthesis in genetic programs for cell growth, differentiation, and viral pathogenesis. The complex also plays a critical role in cotranscriptional histone modification, mRNA processing, mRNA export, and a network of chromatin modifications. Moreover, it contributes to genome integrity maintenance, replication stress response, and cardiac myocyte enlargement. The multifaceted activities of CDK9-CCNK underscore its significance in governing diverse cellular functions and molecular pathways.
Species

Human
Source

Sf9 insect cells
Tag

N-GST;N-Flag
Accession

P50750-1 (M1-F372)&O75909-1 (M1-S300)
Gene ID

1025&8812
Synonyms
CDK9; CCNK; Cyclin-dependent kinase 9; C-2K; Cell division cycle 2-like protein kinase 4; Cell division protein kinase 9; Serine/threonine-protein kinase PITALRE; Tat-associated kinase complex catalytic subunit; Cyclin-K
Molecular Weight

69.3 kDa&36.9 kDa
Purity

Greater than 90% as determined by reducing SDS-PAGE.
Endotoxin Level

<1 EU/μg, determined by LAL method.
Documentation
Handling Instructions (2659 KB)

CDK9-CCNK Heterodimer Protein, Human (Sf9, GST, FLAG) Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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The reconstitution calculator equation

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The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

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Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
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C1   V1   C2   V2

The specific activity calculator equation

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)
Unit/mg = 106 ÷ ng/mL

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