PU.1 is a member of the Ets family of transcription factors and activates target genes through the purine-rich PU-box.
PU.1 plays a pivotal role in the differentiation of myeloid cells and lymphocytes and is expressed in several hematopoietic cells including B lymphocytes, macrophages, neutrophils, mast cells, early erythroid cells, and megakaryocytes.
The concentration of PU.1 is critical for both the determination of hematopoietic cell lineage and the regulation of differentiation versus stem cell proliferation.
In addition, PU.1 activity is influenced by phosphorylation and interactions with other hematopoietic transcription factors.
Phosphorylation of PU.1 at Ser146 by Casein Kinase II (CKII) promotes binding to IRF4 and synergistic activation through the immunoglobulin k 3' enhancer.
Treatment of pro-B cells with IL-3 leads to phosphorylation of PU.1 at Ser140, resulting in increased PU.1 activity and activation of the anti-apoptotic gene MCL-1.
GATA1 binding blocks PU.1 activity during erythroid cell development.
Overexpression of PU.1 resulting from proviral insertion during Friend virus infection can induce erythroleukemia, while reduced expression has been associated with acute myeloid leukemia.
Applications:Suitable for use in ELISA, Immunofluorescence, Flow Cytometry, Western Blot, Immunoprecipitation, Immunohistochemistry and Immunocytochemistry.
Other applications not tested.
Recommended Dilutions:Western Blot: 1:1000.
Incubate membrane with diluted antibody in 5% BSA, 1X TBS, 0.1% Tween-20 at 4°C with gentle shaking, overnight
Specificity：Recognizes endogenous levels of total human PU.1 protein at ~42kD. Does not cross react with other Ets family members. Species Crossreactivity: mouse
Isotype：IgG
Calc Applications Abbrev：ChIP E FC IC IF IHC IP WB
Calc Crossreactivity：Hu Mo
Immunogen：Synthetic peptide corresponding to amino acids at the N-terminus of human PU.1. Species Sequence Homology: monkey and porcine
