Overview

  • Product name

  • Description

    Rabbit polyclonal to Cdk4
  • Host species

    Rabbit
  • Tested applications

    Suitable for: WB, IP, IHC-Pmore details
  • Species reactivity

    Reacts with: Human
  • Immunogen

    Synthetic peptide within Human Cdk4 aa 253-303. The exact sequence is proprietary.
    Database link: P11802

  • Positive control

    • WB: HeLa, HEK-293T and Jurkat cell lysate. IP: HEK-293T cell lysate. IHC: Human lung cancer and breast carcinoma tissue.

Properties

Applications

Our Abpromise guarantee covers the use of ab226474 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
WB 1/2000 - 1/10000. Predicted molecular weight: 34 kDa.
IP Use at 2-10 µg/mg of lysate.
IHC-P 1/500 - 1/2000. Epitope retrieval with citrate buffer pH6.0 is recommended for FFPE tissue sections.

Target

  • Function

    Ser/Thr-kinase component of cyclin D-CDK4 (DC) complexes that phosphorylate and inhibit members of the retinoblastoma (RB) protein family including RB1 and regulate the cell-cycle during G(1)/S transition. Phosphorylation of RB1 allows dissociation of the transcription factor E2F from the RB/E2F complexes and the subsequent transcription of E2F target genes which are responsible for the progression through the G(1) phase. Hypophosphorylates RB1 in early G(1) phase. Cyclin D-CDK4 complexes are major integrators of various mitogenenic and antimitogenic signals. Also phosphorylates SMAD3 in a cell-cycle-dependent manner and represses its transcriptional activity. Component of the ternary complex, cyclin D/CDK4/CDKN1B, required for nuclear translocation and activity of the cyclin D-CDK4 complex.
  • Involvement in disease

    Defects in CDK4 are a cause of susceptibility to cutaneous malignant melanoma type 3 (CMM3) [MIM:609048]. Malignant melanoma is a malignant neoplasm of melanocytes, arising de novo or from a pre-existing benign nevus, which occurs most often in the skin but also may involve other sites.
  • Sequence similarities

    Belongs to the protein kinase superfamily. CMGC Ser/Thr protein kinase family. CDC2/CDKX subfamily.
    Contains 1 protein kinase domain.
  • Post-translational
    modifications

    Phosphorylation at Thr-172 is required for enzymatic activity. Phosphorylated, in vitro, at this site by CCNH-CDK7, but, in vivo, appears to be phosphorylated by a proline-directed kinase. In the cyclin D-CDK4-CDKN1B complex, this phosphorylation and consequent CDK4 enzyme activity, is dependent on the tyrosine phosphorylation state of CDKN1B. Thus, in proliferating cells, CDK4 within the complex is phosphorylated on Thr-172 in the T-loop. In resting cells, phosphorylation on Thr-172 is prevented by the non-tyrosine-phosphorylated form of CDKN1B.
  • Cellular localization

    Cytoplasm. Nucleus. Membrane. Cytoplasmic when non-complexed. Forms a cyclin D-CDK4 complex in the cytoplasm as cells progress through G(1) phase. The complex accumulates on the nuclear membrane and enters the nucleus on transition from G(1) to S phase. Also present in nucleoli and heterochromatin lumps. Colocalizes with RB1 after release into the nucleus.
  • Information by UniProt
  • Database links

  • Alternative names

    • Cdk 4 antibody
    • cdk4 antibody
    • CDK4 protein antibody
    • CDK4_HUMAN antibody
    • Cell division kinase 4 antibody
    • Cell division protein kinase 4 antibody
    • CMM 3 antibody
    • CMM3 antibody
    • Crk3 antibody
    • Cyclin dependent kinase 4 antibody
    • Cyclin-dependent kinase 4 antibody
    • Melanoma cutaneous malignant 3 antibody
    • MGC14458 antibody
    • p34 cdk4 antibody
    • PSK J3 antibody
    • PSK-J3 antibody
    see all

Images

  • All lanes : Anti-Cdk4 antibody (ab226474) at 0.1 µg/ml

    Lane 1 : HeLa (human epithelial cell line from cervix adenocarcinoma) cell lysate
    Lane 2 : HEK-293T (human epithelial cell line from embryonic kidney transformed with large T antigen) cell lysate
    Lane 3 : Jurkat (human T cell leukemia cell line from peripheral blood) cell lysate

    Lysates/proteins at 50 µg per lane.

    Developed using the ECL technique.

    Performed under reducing conditions.

    Predicted band size: 34 kDa


    Exposure time: 30 seconds
  • Cdk4 was immunoprecipitated from HEK-293T (human epithelial cell line from embryonic kidney transformed with large T antigen) whole cell lysate (1.0 mg for IP, 20% of IP loaded) with ab226474 at 6 µg/mg lysate. Western blot was performed from the immunoprecipitate using a different rabbit anti-Cdk4 antibody at 1 µg/ml.

    Lane 1: ab226474 IP in HEK-293T whole cell lysate.

    Lane 2: Control IgG IP in HEK-293T whole cell lysate.

    Detection:  Chemiluminescence with exposure time of 10 seconds.

  • Formalin-fixed, paraffin-embedded human lung cancer tissue stained for Cdk4 using ab226474 at 1:1000 dilution in immunohistochemical analysis.

  • Formalin-fixed, paraffin-embedded human breast carcinoma tissue stained for Cdk4 using ab226474 at 1:1000 dilution in immunohistochemical analysis.

References

This product has been referenced in:

  • Wang G  et al. Upregulation of mtSSB by interleukin-6 promotes cell growth through mitochondrial biogenesis-mediated telomerase activation in colorectal cancer. Int J Cancer N/A:N/A (2018). Read more (PubMed: 30415472) »
See 1 Publication for this product

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