Description

  • Product name

    Recombinant Human Bub1 protein
  • Purity

    > 80 % Densitometry.

  • Expression system

    Baculovirus infected Sf9 cells
  • Accession

  • Protein length

    Protein fragment
  • Animal free

    No
  • Nature

    Recombinant
    • Species

      Human
    • Predicted molecular weight

      63 kDa including tags
    • Amino acids

      756 to 1085
    • Tags

      GST tag N-Terminus

Specifications

Our Abpromise guarantee covers the use of ab127642 in the following tested applications.

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

  • Applications

    Western blot

    SDS-PAGE

  • Form

    Liquid
  • Concentration information loading...

Preparation and Storage

  • Stability and Storage

    Shipped on dry ice. Upon delivery aliquot and store at -80ºC. Avoid freeze / thaw cycles.

    pH: 7.50
    Constituents: 0.31% Glutathione, 0.002% PMSF, 0.004% DTT, 0.79% Tris HCl, 0.003% EDTA, 25% Glycerol, 0.29% Sodium chloride

General Info

  • Alternative names

    • Bub1
    • BUB1 budding uninhibited by benzimidazoles 1 homolog
    • BUB1 budding uninhibited by benzimidazoles 1 homolog (yeast)
    • BUB1 mitotic checkpoint serine/threonine kinase
    • BUB1, S. cerevisiae, homolog of
    • BUB1_HUMAN
    • BUB1A
    • BUB1L
    • Budding uninhibited by benzimidazoles 1 (yeast homolog)
    • Budding uninhibited by benzimidazoles 1 homolog
    • Budding uninhibited by benzimidazoles 1, S. cerevisiae, homolog of
    • hBUB1
    • Homolog of mitotic checkpoint gene BUB1
    • Mitotic checkpoint gene BUB1
    • Mitotic checkpoint serine/threonine protein kinase BUB1
    • Mitotic checkpoint serine/threonine-protein kinase BUB1
    • Mitotic spindle checkpoint kinase
    • Putative serine/threonine protein kinase
    see all
  • Function

    Serine/threonine-protein kinase that performs 2 crucial functions during mitosis: it is essential for spindle-assembly checkpoint signaling and for correct chromosome alignment. Has a key role in the assembly of checkpoint proteins at the kinetochore, being required for the subsequent localization of CENPF, BUB1B, CENPE and MAD2L1. Required for the kinetochore localization of PLK1. Plays an important role in defining SGOL1 localization and thereby affects sister chromatid cohesion. Acts as a substrate for anaphase-promoting complex or cyclosome (APC/C) in complex with its activator CDH1 (APC/C-Cdh1). Necessary for ensuring proper chromosome segregation and binding to BUB3 is essential for this function. Can regulate chromosome segregation in a kinetochore-independent manner. Can phosphorylate BUB3. The BUB1-BUB3 complex plays a role in the inhibition of APC/C when spindle-assembly checkpoint is activated and inhibits the ubiquitin ligase activity of APC/C by phosphorylating its activator CDC20. This complex can also phosphorylate MAD1L1. Kinase activity is essential for inhibition of APC/CCDC20 and for chromosome alignment but does not play a major role in the spindle-assembly checkpoint activity. Mediates cell death in response to chromosome missegregation and acts to suppress spontaneous tumorigenesis.
  • Tissue specificity

    High expression in testis and thymus, less in colon, spleen, lung and small intestine. Expressed in fetal thymus, bone marrow, heart, liver, spleen and thymus. Expression is associated with cells/tissues with a high mitotic index.
  • Sequence similarities

    Belongs to the protein kinase superfamily. Ser/Thr protein kinase family. BUB1 subfamily.
    Contains 1 BUB1 N-terminal domain.
    Contains 1 protein kinase domain.
  • Domain

    The KEN box is required for its ubiquitination and degradation.
    BUB1 N-terminal domain directs kinetochore localization and binding to BUB3.
  • Post-translational
    modifications

    Phosphorylated upon DNA damage, probably by ATM or ATR. Upon spindle-assembly checkpoint activation it is hyperphosphorylated and its kinase activity toward CDC20 is stimulated. Phosphorylation at Thr-609 is required for interaction with PLK1, phosphorylation at this site probably creates a binding site for the POLO-box domain of PLK1, thus enhancing the PLK1-BUB1 interaction.
    Ubiquitinated and degraded during mitotic exit by APC/C-Cdh1.
  • Cellular localization

    Nucleus. Chromosome > centromere > kinetochore. Nuclear in interphase cells. Accumulates gradually during G1 and S phase of the cell cycle, peaks at G2/M, and drops dramatically after mitosis. Localizes to the outer kinetochore. Kinetochore localization is required for normal mitotic timing and checkpoint response to spindle damage and occurs very early in prophase. AURKB, CASC5 and INCENP are required for kinetochore localization.
  • Information by UniProt

Images

  • SDS-PAGE analysis of ab127642. Approx. MW = 63kDa

References

ab127642 has not yet been referenced specifically in any publications.

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