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Cell Cycle

The cell cycle pathway is a unidirectional process that governs cell division. This process, which cannot be reversed once started, is critical for cell survival. The cell cycle typically involves four phases: S phase, in which DNA is replicated, M phase, in which chromosomes are separated and two distinct cells are formed, and G1 and G2 phases during which the cell is preparing for cell division. The majority of the cell cycle pathway is regulated by two classes of proteins: cyclin-dependent kinases (CDKs) and cyclins. Cyclins and CDKs form complexes that enable CDKs to phosphorylate and activate specific cell cycle intermediates. In the initial stages of the cell-cycle signal, cyclin D will bind to CDK4 and this complex will phosphorylate the retinoblastoma (Rb) gene[1]. During a quiescent state, Rb is bound to DNA and blocks the transcription of specific genes. After phosphorylation, Rb becomes unbound and genes necessary for the cell cycle are now accessible.

The cell cycle pathway is a highly-regulated process that incorporates three major checkpoints. The first checkpoint is the G1 checkpoint, which determines whether or not a cell will enter into the cell division process. The second checkpoint, G2, will determine if the cell will enter into mitosis. Both the G1 and G2 checkpoints can be affected by the presence or absence of various growth factors, DNA damage, or replicative senescence. The final checkpoint, metaphase, ensures proper chromosome alignment prior to cell division. The cell cycle pathway is intrinsically linked to cell survival and cell death. For instance, failure of a cell to meet the requirements of the individual cell cycle checkpoints will result in the cell undergoing apoptosis.

In cancer, the cell cycle checkpoints are often dysfunctional. Checkpoint proteins, such as Rb or p53, are often mutated or inactivated and this can result in cell division despite incomplete DNA synthesis and segregation errors. Inappropriate continuation of the cell cycle can lead to genomic instability, which is a common feature of malignant cells.

1. Nigg. 1995. Cyclin-dependent protein kinases: key regulators of the eukaryotic cell cycle. Bioessays. 17(6):471-80.

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Cell Cycle pathway image by Aviva Systems Biology

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  •  
    RBL2 Antibody (OASA08144)

    RBL2 Antibody (OASA08144)

    Protein Name:Retinoblastoma-like protein 2
    Catalog #:OASA08144
    Type: pAb
    Reacts with: Human
    Application: IHC-AFF, ELISA, IP, IHC-FFPE, WB
    Product Size: 0.1ml
    Price (USD): $690.00
  •  
    p21/WAF1 Antibody (OASA03185)

    p21/WAF1 Antibody (OASA03185)

    Protein Name:Cyclin-dependent kinase inhibitor 1
    Catalog #:OASA03185
    Type: mAb
    Reacts with:
    Application: IHC-AFF, FC, IHC-FFPE
    Product Size: 10ug
    Price (USD): $450.00
  •  
    Ywhaz Antibody (OASA08615)

    Ywhaz Antibody (OASA08615)

    Protein Name:14-3-3 protein zeta/delta
    Catalog #:OASA08615
    Type: pAb
    Reacts with: Rat
    Application: WB
    Product Size: 0.1ml
    Price (USD): $750.00
  •  
    CCND1 Antibody (OASA00562)

    CCND1 Antibody (OASA00562)

    Protein Name:G1/S-specific cyclin-D1
    Catalog #:OASA00562
    Type: mAb
    Reacts with: Human
    Application: IHC-AFF, ELISA, FC, IP, IHC-FFPE, WB
    Product Size: 0.1mg
    Price (USD): $490.00
  •  
    Gsk3b Antibody (OASA07320)

    Gsk3b Antibody (OASA07320)

    Protein Name:Glycogen synthase kinase-3 beta
    Catalog #:OASA07320
    Type: pAb
    Reacts with: Rat
    Application: WB
    Product Size: 0.1ml
    Price (USD): $750.00
  •  
    CDK7 Antibody (OASA02603)

    CDK7 Antibody (OASA02603)

    Protein Name:Cyclin-dependent kinase 7
    Catalog #:OASA02603
    Type: mAb
    Reacts with: Human
    Application: IHC-F, IP, WB
    Product Size: 0.1mg
    Price (USD): $660.00
  •  
    CDKN1B Antibody (OASA08060)

    CDKN1B Antibody (OASA08060)

    Protein Name:Cyclin-dependent kinase inhibitor 1B
    Catalog #:OASA08060
    Type: pAb
    Reacts with: Human
    Application: ELISA, IP, WB
    Product Size: 50ul
    Price (USD): $390.00
  •  
    p16 Antibody (OASA03183)

    p16 Antibody (OASA03183)

    Protein Name:Cyclin-dependent kinase inhibitor 2A, isoforms 1/2/3
    Catalog #:OASA03183
    Type: mAb
    Reacts with:
    Application: IHC-AFF, FC, WB
    Product Size: 0.1mg
    Price (USD): $450.00
  •  
    Mdm2 Antibody (OASA08459)

    Mdm2 Antibody (OASA08459)

    Protein Name:E3 ubiquitin-protein ligase Mdm2
    Catalog #:OASA08459
    Type: pAb
    Reacts with: Mouse
    Application: ELISA, WB
    Product Size: 50ug
    Price (USD): $395.00
  •  
    TGFB1 Antibody (OASA04458)

    TGFB1 Antibody (OASA04458)

    Protein Name:Transforming growth factor beta-1
    Catalog #:OASA04458
    Type: mAb
    Reacts with: Cow, Human, Mouse
    Application: ELISA, IHC-FFPE, WB
    Product Size: 0.1mg
    Price (USD): $590.00
  •  
    Ywhab Antibody (OASA06929)

    Ywhab Antibody (OASA06929)

    Protein Name:14-3-3 protein beta/alpha
    Catalog #:OASA06929
    Type: pAb
    Reacts with: Rat
    Application: WB
    Product Size: 0.1ml
    Price (USD): $750.00
  •  
    Rabbit ANTI ATR Antibody (OASA07007)

    Rabbit ANTI ATR Antibody (OASA07007)

    Protein Name:Serine/threonine-protein kinase ATR
    Catalog #:OASA07007
    Type: pAb
    Reacts with:
    Application: IHC-FFPE, WB
    Product Size: 50ug
    Price (USD): $590.00
  •  
    C-ABL Antibody (OASA00409)

    C-ABL Antibody (OASA00409)

    Protein Name:Tyrosine-protein kinase ABL1
    Catalog #:OASA00409
    Type: mAb
    Reacts with:
    Application: WB, IF, IP
    Product Size: 0.1mg
    Price (USD): $440.00
  •  
    CCNE1 Antibody (OASA07193)

    CCNE1 Antibody (OASA07193)

    Protein Name:G1/S-specific cyclin-E1
    Catalog #:OASA07193
    Type: pAb
    Reacts with: Human
    Application: ELISA, IP, WB
    Product Size: 50ul
    Price (USD): $380.00
  •  
    CDC25A Antibody (OASA02601)

    CDC25A Antibody (OASA02601)

    Protein Name:M-phase inducer phosphatase 1
    Catalog #:OASA02601
    Type: mAb
    Reacts with: Human
    Application: IP, WB
    Product Size: 0.1mg
    Price (USD): $690.00
  •  
    CREBBP Antibody (OASA07643)

    CREBBP Antibody (OASA07643)

    Protein Name:CREB-binding protein
    Catalog #:OASA07643
    Type: pAb
    Reacts with: Human
    Application: IP, WB
    Product Size: 0.1mg
    Price (USD): $640.00
  •  
    SMC1A Antibody (OASA08168)

    SMC1A Antibody (OASA08168)

    Protein Name:Structural maintenance of chromosomes protein 1A
    Catalog #:OASA08168
    Type: pAb
    Reacts with: Human
    Application: IP, WB
    Product Size: 0.1mg
    Price (USD): $865.00
  •  
    RB1 Antibody (OASA03273)

    RB1 Antibody (OASA03273)

    Protein Name:Retinoblastoma-associated protein
    Catalog #:OASA03273
    Type: mAb
    Reacts with: Human
    Application: IHC-AFF, IHC-FFPE, WB
    Product Size: 1ml
    Price (USD): $1,205.00
  •  
    SMAD3 Antibody (OASA08793)

    SMAD3 Antibody (OASA08793)

    Protein Name:Mothers against decapentaplegic homolog 3
    Catalog #:OASA08793
    Type: pAb
    Reacts with: Human
    Application: ELISA, IHC-FFPE, WB
    Product Size: 50ug
    Price (USD): $750.00
  •  
    MCM3 Antibody (OASA06339)

    MCM3 Antibody (OASA06339)

    Protein Name:DNA replication licensing factor MCM3
    Catalog #:OASA06339
    Type: pAb
    Reacts with: Human
    Application: WB
    Product Size: 0.1mg
    Price (USD): $690.00
  •  
    YWHAQ Antibody (OASA06936)

    YWHAQ Antibody (OASA06936)

    Protein Name:
    Catalog #:OASA06936
    Type: pAb
    Reacts with: Sheep
    Application: ELISA, IHC-FFPE, WB
    Product Size: 0.1ml
    Price (USD): $500.00
  •  
    CCND2 Antibody (OASA00564)

    CCND2 Antibody (OASA00564)

    Protein Name:G1/S-specific cyclin-D2
    Catalog #:OASA00564
    Type: mAb
    Reacts with: Human
    Application: IHC-AFF, IP, WB
    Product Size: 0.1mg
    Price (USD): $735.00
  •  
    HDAC1 Antibody (OASA07341)

    HDAC1 Antibody (OASA07341)

    Protein Name:Histone deacetylase 1
    Catalog #:OASA07341
    Type: pAb
    Reacts with: Human
    Application: ELISA, IF, IHC-FFPE, WB
    Product Size: 50ug
    Price (USD): $750.00
  •  
    CCND3 Antibody (OASA02653)

    CCND3 Antibody (OASA02653)

    Protein Name:G1/S-specific cyclin-D3
    Catalog #:OASA02653
    Type: mAb
    Reacts with: Human
    Application: IHC-AFF, IHC-FFPE, WB
    Product Size: 1ml
    Price (USD): $1,130.00

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Showing 1 - 30 of 81