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Product Pathways - Cell Cycle / Checkpoint

ENSA (D5Z1U) Rabbit mAb #11915

Item# Description List Price Web Price Qty
11915S ENSA (D5Z1U) Rabbit mAb - 100 µl $372.00
$334.80
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*On-line ordering is for Canadian customers only. Web pricing is applicable only to orders placed online at www.neb.ca
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VIEW COMPANION PRODUCTS HIDE COMPANION PRODUCTS
Application Dilution Species-Reactivity Sensitivity MW (kDa) Isotype
W Human, Monkey Endogenous 15 Rabbit IgG

Species cross-reactivity is determined by western blot.

Applications Key: W=Western Blotting

Protocols

Specificity / Sensitivity

ENSA (D5Z1U) Rabbit mAb recognizes endogenous levels of total ENSA protein.

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues near the carboxy terminus of human ENSA protein.

Western Blotting

Western Blotting

Western blot analysis of extracts from various cell lines using ENSA (D5Z1U) Rabbit mAb.

Background

Mitotic control is important for normal growth, development, and maintenance of all eukaryotic cells. Research studies have demonstrated that inappropriate control of mitosis can lead to genomic instability and cancer (reviewed in 1,2). A regulator of mitosis, Greatwall kinase (Gwl), was first identified in Drosophila melanogaster (3). Subsequent studies showed that, based on sequence homology and function, microtubule-associated serine/threonine kinase-like (MASTL) is the human ortholog of Gwl (4). Regulation of MASTL/Gwl activation has been shown to be critical for the correct timing of mitosis. Research studies have shown that Gwl is activated by hyperphosphorylation (5). The phosphorylation of human Gwl at Thr194 and Thr207 by active cyclin B1-cdc2 leads to possible autophosphorylation at Ser875 (Ser883 in Xenopus), which stabilizes the kinase. Activated Gwl phosphorylates α-Endosulfine (ENSA) and cAMP-regulated phosphoprotein 19 (ARPP19) at Ser67 and Ser62, respectively. Phosphorylated ENSA and ARPP19 inhibit the activity of the B55 subunit-associated form of protein phosphatase 2A (PP2A-B55), allowing for complete phosphorylation of mitotic substrates by cyclin B1-cdc2 and mitotic entry. When Gwl is inactivated, PP2A-B55 reactivates, which leads to dephosphorylation of cyclin B1-cdc2 and mitotic exit (5,6, reviewed in 7).

  1. Eichhorn, P.J. et al. (2009) Biochim Biophys Acta 1795, 1-15.
  2. Norbury, C. and Nurse, P. (1992) Annu Rev Biochem 61, 441-70.
  3. Yu, J. et al. (2004) J Cell Biol 164, 487-92.
  4. Voets, E. and Wolthuis, R.M. (2010) Cell Cycle 9, 3591-601.
  5. Blake-Hodek, K.A. et al. (2012) Mol Cell Biol 32, 1337-53.
  6. Vigneron, S. et al. (2011) Mol Cell Biol 31, 2262-75.
  7. Lorca, T. and Castro, A. (2012) Oncogene 32, 537-543.

Application References

Have you published research involving the use of our products? If so we'd love to hear about it. Please let us know!


 

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