AB38840

Anti-Cdk9 antibody

BOND RX™ Validated
What is this?

(1 Review)

(2 Publications)

Rabbit Polyclonal CDK9 antibody. Suitable for WB, sELISA, ICC/IF, IHC-P and reacts with Human, Synthetic peptide - Human samples. Cited in 2 publications.

View Alternative Names

CDC2L4, TAK, CDK9, 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

4 Images

Immunocytochemistry/ Immunofluorescence - Anti-Cdk9 antibody (AB38840)

ICC/IF

Unknown

Immunocytochemistry/ Immunofluorescence - Anti-Cdk9 antibody (AB38840)

ICC/IF image of ab38840 stained human HeLa cells. The cells were PFA fixed (10 min), permabilised in TBS-T (20 min) and incubated with the antibody (ab38840, 1μg/ml) for 1h at room temperature. 1%BSA / 10% normal serum / 0.3M glycine was used to quench autofluorescence and block non-specific protein-protein interactions. The secondary antibody (green) was Alexa Fluor® 488 goat anti-rabbit IgG (H+L) used at a 1/1000 dilution for 1h. Alexa Fluor® 594 WGA was used to label plasma membranes (red). DAPI was used to stain the cell nuclei (blue).

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cdk9 antibody (AB38840)

IHC-P

Unknown

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cdk9 antibody (AB38840)

IHC image of ab38840 staining Cdk9 in Human breast adenocarcinoma formalin fixed paraffin embedded tissue section, performed on a Leica Bond^TM system using the standard protocol F. The section was pre-treated using heat mediated antigen retrieval with sodium citrate buffer (pH6, epitope retrieval solution 1) for 20 mins. The section was then incubated with ab38840, 1µg/ml, for 15 mins at room temperature and detected using an HRP conjugated compact polymer system. DAB was used as the chromogen. The section was then counterstained with haematoxylin and mounted with DPX.

For other IHC staining systems (automated and non-automated) customers should optimize variable parameters such as antigen retrieval conditions, primary antibody concentration and antibody incubation times.

Project2721****

Western blot - Anti-Cdk9 antibody (AB38840)

An additional band at approximately 34 kDa is occasionally observed with ab38840. This is thought to be due to cross-reactivity.

All lanes:

Western blot - Anti-Cdk9 antibody (ab38840) at 1/250 dilution

Lane 1:

HeLa (Human epithelial carcinoma cell line) Whole Cell Lysate at 10 µg

Lane 2:

Western blot - Jurkat whole cell lysate (<a href='/en-us/products/cell-lysates/jurkat-whole-cell-lysate-ab7899'>ab7899</a>) at 10 µg

Lane 3:

Western blot - A-431 whole cell lysate (<a href='/en-us/products/cell-lysates/a-431-whole-cell-lysate-ab7909'>ab7909</a>) at 10 µg

Lane 4:

Western blot - HEK-293 whole cell lysate (<a href='/en-us/products/cell-lysates/hek-293-whole-cell-lysate-ab7902'>ab7902</a>) at 10 µg

Secondary

All lanes:

IRDye 680 Conjugated Goat Anti-Rabbit IgG (H+L) at 1/10000 dilution

Predicted band size: 43 kDa

Observed band size: 140 kDa,260 kDa,41 kDa

false

Sandwich ELISA - Anti-Cdk9 antibody (AB38840)

sELISA

Unknown

Sandwich ELISA - Anti-Cdk9 antibody (AB38840)

Standard Curve for Cdk9 (Analyte : Cdk9 protein (Tagged) (ab85603)); dilution range 1pg/ml to 1μg/ml using Capture Antibody Mouse monoclonal to Cdk9 (ab76873) at 5μg/ml and Detector Antibody Rabbit polyclonal to Cdk9 (ab38840) at 0.5μg/ml.

Key facts

Host species

Rabbit

Clonality

Polyclonal

Isotype

IgG

Carrier free

Reacts with

Human

Applications

WB, ICC/IF, IHC-P, sELISA

applications

Immunogen

The exact immunogen used to generate this antibody is proprietary information.

Specificity

From Jan 2024, QC testing of replenishment batches of this polyclonal changed. All tested and expected application and reactive species combinations are still covered by our Abcam product promise. However, we no longer test all applications. For more information on a specific batch, please contact our Scientific Support who will be happy to help. You may also be interested in our alternative recombinant antibody, ab76320.

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Reactivity data

{ "title": "Reactivity Data", "filters": { "stats": ["", "Species", "Dilution Info", "Notes"], "tabs": { "all-applications": {"fullname" : "All Applications", "shortname": "All Applications"}, "WB" : {"fullname" : "Western blot", "shortname":"WB"}, "sELISA" : {"fullname" : "Sandwich ELISA", "shortname":"sELISA"}, "ICCIF" : {"fullname" : "Immunocytochemistry/ Immunofluorescence", "shortname":"ICC/IF"}, "IHCP" : {"fullname" : "Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections)", "shortname":"IHC-P"} }, "product-promise": { "all": "all", "testedAndGuaranteed": "tested", "guaranteed": "expected", "predicted": "predicted", "notRecommended": "not-recommended" } }, "values": { "Human": { "WB-species-checked": "testedAndGuaranteed", "WB-species-dilution-info": "1/250", "WB-species-notes": "", "sELISA-species-checked": "predicted", "sELISA-species-dilution-info": "", "sELISA-species-notes": "", "ICCIF-species-checked": "guaranteed", "ICCIF-species-dilution-info": "1 µg/mL", "ICCIF-species-notes": "", "IHCP-species-checked": "guaranteed", "IHCP-species-dilution-info": "1 µg/mL", "IHCP-species-notes": "" }, "Mouse": { "WB-species-checked": "predicted", "WB-species-dilution-info": "", "WB-species-notes": "", "sELISA-species-checked": "predicted", "sELISA-species-dilution-info": "", "sELISA-species-notes": "", "ICCIF-species-checked": "predicted", "ICCIF-species-dilution-info": "", "ICCIF-species-notes": "", "IHCP-species-checked": "predicted", "IHCP-species-dilution-info": "", "IHCP-species-notes": "" }, "Rat": { "WB-species-checked": "predicted", "WB-species-dilution-info": "", "WB-species-notes": "", "sELISA-species-checked": "predicted", "sELISA-species-dilution-info": "", "sELISA-species-notes": "", "ICCIF-species-checked": "predicted", "ICCIF-species-dilution-info": "", "ICCIF-species-notes": "", "IHCP-species-checked": "predicted", "IHCP-species-dilution-info": "", "IHCP-species-notes": "" }, "Cow": { "WB-species-checked": "predicted", "WB-species-dilution-info": "", "WB-species-notes": "", "sELISA-species-checked": "predicted", "sELISA-species-dilution-info": "", "sELISA-species-notes": "", "ICCIF-species-checked": "predicted", "ICCIF-species-dilution-info": "", "ICCIF-species-notes": "", "IHCP-species-checked": "predicted", "IHCP-species-dilution-info": "", "IHCP-species-notes": "" }, "Synthetic peptide - Human": { "WB-species-checked": "notRecommended", "WB-species-dilution-info": "", "WB-species-notes": "", "sELISA-species-checked": "guaranteed", "sELISA-species-dilution-info": "", "sELISA-species-notes": "For sandwich ELISA, use this antibody as Detection at 0.5 µg/ml with Mouse monoclonal to Cdk9 (<a href='/en-us/products/unavailable/cdk9-antibody-ab76873'>ab76873</a>) as Capture.", "ICCIF-species-checked": "notRecommended", "ICCIF-species-dilution-info": "", "ICCIF-species-notes": "", "IHCP-species-checked": "notRecommended", "IHCP-species-dilution-info": "", "IHCP-species-notes": "" } } }

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Properties and storage information

Form

Liquid

Purification technique

Affinity purification Immunogen

Storage buffer

pH: 7.4 Preservative: 0.02% Sodium azide Constituents: PBS, 1% BSA

Shipped at conditions

Blue Ice

Appropriate short-term storage duration

1-2 weeks

Appropriate short-term storage conditions

+4°C

Appropriate long-term storage conditions

-20°C

Aliquoting information

Upon delivery aliquot

Storage information

Avoid freeze / thaw cycle

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Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

Cyclin-dependent kinase 9 (Cdk9) is a serine/threonine protein kinase involved in regulating transcription elongation. It is often referred to as part of the positive transcription elongation factor b (P-TEFb) complex. Cdk9 partners with cyclin T1 T2 or K to form this complex allowing it to phosphorylate the carboxyl-terminal domain (CTD) of RNA polymerase II. The molecular weight of Cdk9 is around 42 kDa. This protein is ubiquitously expressed found in many tissues including the heart liver and brain reflecting its important role.

Biological function summary

Cdk9 functions as a central component of transcriptional processes. It is essential for the transition of RNA polymerase II from the initiation phase to productive elongation. As part of the P-TEFb complex Cdk9 targets negative elongation factors helping relieve their inhibition. This regulation is especially important in the control of genes with strong promoter proximally paused polymerase. By doing so Cdk9 controls the expression of several genes involved in cell growth differentiation and response to stress.

Pathways

Cdk9 plays a significant role in transcription and signal transduction pathways. One important pathway is the NF-κB signaling where Cdk9 regulates the transcription of NF-κB target genes involved in immune response. Another significant pathway is the heat shock response where Cdk9 enhances the expression of heat shock proteins helping cells deal with stress. In both pathways it cooperates with other proteins like cyclins and negative elongation factors illustrating its interconnected role in cellular function.

Cdk9 has been linked to several conditions most notably cancer and cardiac hypertrophy. Its overactivation can lead to increased transcription of genes involved in proliferation making it a focus for cancer research. Cdk9 is also implicated in cardiac hypertrophy where its activity affects gene expression that can exacerbate the condition. Researchers study its interaction with other proteins such as THZ1 a Cdk9 inhibitor to explore potential therapeutic avenues.

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Product protocols

For this product, it's our understanding that no specific protocols are required. You can visit:

Visit the General protocols
Visit the Troubleshooting

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Target data

Protein kinase involved in the regulation of transcription (PubMed : 10574912, PubMed : 10757782, PubMed : 11145967, PubMed : 11575923, PubMed : 11809800, PubMed : 11884399, PubMed : 14701750, PubMed : 16109376, PubMed : 16109377, PubMed : 20930849, PubMed : 28426094, PubMed : 29335245). Member of the cyclin-dependent kinase pair (CDK9/cyclin-T) complex, also called positive transcription elongation factor b (P-TEFb), which facilitates the transition from abortive to productive elongation by phosphorylating the CTD (C-terminal domain) of the large subunit of RNA polymerase II (RNAP II) POLR2A, SUPT5H and RDBP (PubMed : 10574912, PubMed : 10757782, PubMed : 11145967, PubMed : 11575923, PubMed : 11809800, PubMed : 11884399, PubMed : 14701750, PubMed : 16109376, PubMed : 16109377, PubMed : 20930849, PubMed : 28426094, PubMed : 30134174). This complex is inactive when in the 7SK snRNP complex form (PubMed : 10574912, PubMed : 10757782, PubMed : 11145967, PubMed : 11575923, PubMed : 11809800, PubMed : 11884399, PubMed : 14701750, PubMed : 16109376, PubMed : 16109377, PubMed : 20930849, PubMed : 28426094). Phosphorylates EP300, MYOD1, RPB1/POLR2A and AR and the negative elongation factors DSIF and NELFE (PubMed : 10912001, PubMed : 11112772, PubMed : 12037670, PubMed : 20081228, PubMed : 20980437, PubMed : 21127351, PubMed : 9857195). Regulates cytokine inducible transcription networks by facilitating promoter recognition of target transcription factors (e.g. TNF-inducible RELA/p65 activation and IL-6-inducible STAT3 signaling) (PubMed : 17956865, PubMed : 18362169). Promotes RNA synthesis in genetic programs for cell growth, differentiation and viral pathogenesis (PubMed : 10393184, PubMed : 11112772). P-TEFb is also involved in cotranscriptional histone modification, mRNA processing and mRNA export (PubMed : 15564463, PubMed : 19575011, PubMed : 19844166). Modulates a complex network of chromatin modifications including histone H2B monoubiquitination (H2Bub1), H3 lysine 4 trimethylation (H3K4me3) and H3K36me3; integrates phosphorylation during transcription with chromatin modifications to control co-transcriptional histone mRNA processing (PubMed : 15564463, PubMed : 19575011, PubMed : 19844166). The CDK9/cyclin-K complex has also a kinase activity towards CTD of RNAP II and can substitute for CDK9/cyclin-T P-TEFb in vitro (PubMed : 21127351). Replication stress response protein; the CDK9/cyclin-K complex is required for genome integrity maintenance, by promoting cell cycle recovery from replication arrest and limiting single-stranded DNA amount in response to replication stress, thus reducing the breakdown of stalled replication forks and avoiding DNA damage (PubMed : 20493174). In addition, probable function in DNA repair of isoform 2 via interaction with KU70/XRCC6 (PubMed : 20493174). Promotes cardiac myocyte enlargement (PubMed : 20081228). RPB1/POLR2A phosphorylation on 'Ser-2' in CTD activates transcription (PubMed : 21127351). AR phosphorylation modulates AR transcription factor promoter selectivity and cell growth. DSIF and NELF phosphorylation promotes transcription by inhibiting their negative effect (PubMed : 10912001, PubMed : 11112772, PubMed : 9857195). The phosphorylation of MYOD1 enhances its transcriptional activity and thus promotes muscle differentiation (PubMed : 12037670). Catalyzes phosphorylation of KAT5, promoting KAT5 recruitment to chromatin and histone acetyltransferase activity (PubMed : 29335245).

See full target information CDK9

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Publications (2)

Recent publications for all applications. Explore the full list and refine your search

Transcription 14:146-157 PubMed36927323

2023

A method for in situ visualization of Protein-Nascent RNA interactions in single cell using Proximity Ligation Assay (IPNR-PLA) in mammalian cells.

Applications

Unspecified application

Species

Unspecified reactive species

Rituparna Das,Anusree Dey,Sheetal Uppal

Oncogenesis 4:e161 PubMed26214578

2015

Combined transcriptome studies identify AFF3 as a mediator of the oncogenic effects of β-catenin in adrenocortical carcinoma.

Applications

ICC/IF

Species

Unspecified reactive species

L Lefèvre,H Omeiri,L Drougat,C Hantel,M Giraud,P Val,S Rodriguez,K Perlemoine,C Blugeon,F Beuschlein,A de Reyniès,M Rizk-Rabin,J Bertherat,B Ragazzon

View all publications

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Product promise

We are committed to supporting your work with high-quality reagents, and we're here for you every step of the way. In the unlikely event that one of our products does not perform as expected, you're protected by our Product Promise.

For full details, please see our Terms & Conditions

Please note: All products are 'FOR RESEARCH USE ONLY. NOT FOR USE IN DIAGNOSTIC OR THERAPEUTIC PROCEDURES'.

For licensing inquiries, please contact partnerships@abcam.com

Anti-Cdk9 antibody

Immunocytochemistry/ Immunofluorescence - Anti-Cdk9 antibody (AB38840)

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) - Anti-Cdk9 antibody (AB38840)

Western blot - Anti-Cdk9 antibody (AB38840)

Sandwich ELISA - Anti-Cdk9 antibody (AB38840)

Key facts

Host species

Clonality

Isotype

Carrier free

Reacts with

Applications

Immunogen

Specificity

Reactivity data

Properties and storage information

Form

Purification technique

Storage buffer

Shipped at conditions

Appropriate short-term storage duration

Appropriate short-term storage conditions

Appropriate long-term storage conditions

Aliquoting information

Storage information

Supplementary information

Biological function summary

Pathways

Product protocols

Target data

Publications (2)

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