Product nameAnti-PLK1 (phospho S137) antibody
See all PLK1 primary antibodies
DescriptionRabbit polyclonal to PLK1 (phospho S137)
Tested applicationsSuitable for: IP, ICC/IF, IHC-P, ELISA, WBmore details
Species reactivityReacts with: Human
Predicted to work with: Mouse, Rat, Chicken, Xenopus laevis
Synthetic peptide corresponding to Human PLK1 aa 100-200 conjugated to keyhole limpet haemocyanin.
(Peptide available as
- This antibody gave a positive signal in Human normal colon FFPE section. IF/ICC: MCF7 cell line.
Storage instructionsShipped at 4°C. Store at +4°C short term (1-2 weeks). Upon delivery aliquot. Store at -20°C or -80°C. Avoid freeze / thaw cycle.
Storage bufferPreservative: 0.02% Sodium Azide
Constituents: 1% BSA, PBS, pH 7.4
Concentration information loading...
PurityImmunogen affinity purified
Immunizing Peptide (Blocking)
Our Abpromise guarantee covers the use of ab21738 in the following tested applications.
The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.
|IP||Use at an assay dependent concentration.|
|ICC/IF||Use a concentration of 5 µg/ml.
|IHC-P||Use a concentration of 1 µg/ml. Perform heat mediated antigen retrieval before commencing with IHC staining protocol.|
|ELISA||Use at an assay dependent concentration.|
|WB||Use at an assay dependent concentration.|
FunctionSerine/threonine-protein kinase that performs several important functions throughout M phase of the cell cycle, including the regulation of centrosome maturation and spindle assembly, the removal of cohesins from chromosome arms, the inactivation of APC/C inhibitors, and the regulation of mitotic exit and cytokinesis. Required for recovery after DNA damage checkpoint and entry into mitosis. Required for kinetochore localization of BUB1B. Phosphorylates SGOL1. Required for spindle pole localization of isoform 3 of SGOL1 and plays a role in regulating its centriole cohesion function. Phosphorylates BORA, and thereby promotes the degradation of BORA. Contributes to the regulation of AURKA function. Regulates TP53 stability through phosphorylation of TOPORS.
Tissue specificityPlacenta and colon.
Sequence similaritiesBelongs to the protein kinase superfamily. Ser/Thr protein kinase family. CDC5/Polo subfamily.
Contains 2 POLO box domains.
Contains 1 protein kinase domain.
Developmental stageAccumulates to a maximum during the G2 and M phases, declines to a nearly undetectable level following mitosis and throughout G1 phase, and then begins to accumulate again during S phase.
modificationsCatalytic activity is enhanced by phosphorylation of Thr-210. Phosphorylation at Thr-210 is first detected on centrosomes in the G2 phase of the cell cycle, peaks in prometaphase and gradually disappears from centrosomes during anaphase.
Autophosphorylation and phosphorylation of Ser-137 may not be significant for the activation of PLK1 during mitosis, but may enhance catalytic activity during recovery after DNA damage checkpoint.
Ubiquitinated by the anaphase promoting complex/cyclosome (APC/C) in anaphase and following DNA damage, leading to its degradation by the proteasome. Ubiquitination is mediated via its interaction with FZR1/CDH1. Ubiquitination and subsequent degradation prevents entry into mitosis and is essential to maintain an efficient G2 DNA damage checkpoint.
Cellular localizationNucleus. Chromosome > centromere > kinetochore. Cytoplasm > cytoskeleton > centrosome. During early stages of mitosis, the phosphorylated form is detected on centrosomes and kinetochores. Localizes to the outer kinetochore. Presence of SGOL1 and interaction with the phosphorylated form of BUB1 is required for the kinetochore localization.
- Information by UniProt
- Cell cycle regulated protein kinase antibody
- PLK 1 antibody
- PLK antibody
ICC/IF image of ab21738 stained MCF7 cells. The cells were 100% Methanol fixed (5 min) and then incubated in 1%BSA / 10% normal Goat serum / 0.3M glycine in 0.1% PBS-Tween for 1h to permeabilise the cells and block non-specific protein-protein interactions. The cells were then incubated with the antibody (ab21738, 5µg/ml) overnight at +4°C. The secondary antibody (green) was ab96899, DyLight® 488 Goat anti-Rabit IgG (H+L) used at a 1/250 dilution for 1h. Alexa Fluor® 594 WGA was used to label plasma membranes (red) at a 1/200 dilution for 1h. DAPI was used to stain the cell nuclei (blue) at a concentration of 1.43µM.
IHC image of PLK1 (phospho S137) staining in human normal colon FFPE section, performed on a BondTM 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 ab21738, 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
PLK1 (phospho S137) immunoprecipitation from Human HeLa cells using ab21738. 200 µg of cell lysate was incubated with primary antibody (15 µg/mg cell lysate) and matrix (Protein G) and incubated for 2 hour 4°C.
Lane 1: Control beads
Lane 2: Anti-PLK1 (phospho S137) IP
Immunoprecipitation was confirmed by western blot with an HRP-conjugated Mouse monoclonal antibody against pan-PLK1 (1/5000)
This product has been referenced in:
- Watts E et al. Designing Dual Inhibitors of Anaplastic Lymphoma Kinase (ALK) and Bromodomain-4 (BRD4) by Tuning Kinase Selectivity. J Med Chem 62:2618-2637 (2019). Read more (PubMed: 30789735) »
- Martínez-León E et al. Protein kinase D1 inhibition interferes with mitosis progression. J Cell Physiol N/A:N/A (2019). Read more (PubMed: 30997696) »