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PU.1 Binds to the PU-box, a purine-rich DNA sequence (5'- GAGGAA-3') that can act as a lymphoid-specific enhancer. This protein is a transcriptional activator that may be specifically involved in the differentiation or activation of macrophages or B- cells. Also binds RNA and may modulate pre-mRNA splicing. Binds DNA as a monomer. Interacts with CEBPD and NONO. Interacts with RUNX1 and SPIB. Interacts with GFI1; the interaction represses SPI1 transcriptional activity. Highly expressed in both FV-P and FV-A-induced erythro- leukemia cell lines that have undergone rearrangements of the Spi- 1 gene due to the insertion of SFFV. Belongs to the ETS family. 2 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Protein type: DNA-binding; Oncoprotein; Transcription factor
Chromosomal Location of Human Ortholog: 11p11.2
Cellular Component: nuclear chromatin; nucleoplasm
Molecular Function: NFAT protein binding; protein binding; RNA polymerase II transcription factor activity, enhancer binding; transcription factor activity
Biological Process: negative regulation of gene expression, epigenetic; negative regulation of transcription, DNA-dependent; positive regulation of transcription from RNA polymerase II promoter; positive regulation of transcription, DNA-dependent; regulation of erythrocyte differentiation; regulation of transcription from RNA polymerase II promoter
Reference #:  P17947 (UniProtKB)
Alt. Names/Synonyms: 31 kDa transforming protein; 31 kDa-transforming protein; hematopoietic transcription factor PU.1; OF; PU.1; SFPI1; SPI-1; SPI-1 proto-oncogene; SPI-A; SPI1; spleen focus forming virus (SFFV) proviral integration oncogene spi1; Transcription factor PU.1
Gene Symbols: SPI1
Molecular weight: 31,083 Da
Basal Isoelectric point: 6.31  Predict pI for various phosphorylation states
Protein-Specific Antibodies or siRNAs from Cell Signaling Technology® Total Proteins
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