Anti-Transcription factor Sp1 SP1 Antibody Picoband® Fluoro647 Conjugated

Transcription factor Sp1, also known as specificity protein 1* is a protein that in humans is encoded by the SP1 gene. The protein encoded by this gene is a zinc finger transcription factor that binds to GC-rich motifs of many promoters. The encoded protein is involved in many cellular processes, including cell differentiation, cell growth, apoptosis, immune responses, response to DNA damage, and chromatin remodeling. Post-translational modifications such as phosphorylation, acetylation, glycosylation, and proteolytic processing significantly affect the activity of this protein, which can be an activator or a repressor. Three transcript variants encoding different isoforms have been found for this gene.

Transcription factor that can activate or repress transcription in response to physiological and pathological stimuli. Binds with high affinity to GC-rich motifs and regulates the expression of a large number of genes involved in a variety of processes such as cell growth, apoptosis, differentiation and immune responses. Highly regulated by post-translational modifications (phosphorylations, sumoylation, proteolytic cleavage, glycosylation and acetylation) . Binds also the PDGFR- alpha G-box promoter. May have a role in modulating the cellular response to DNA damage. Implicated in chromatin remodeling. Plays a role in the recruitment of SMARCA4/BRG1 on the c-FOS promoter. Plays an essential role in the regulation of FE65 gene expression. In complex with ATF7IP, maintains telomerase activity in cancer cells by inducing TERT and TERC gene expression. Isoform 3 is a stronger activator of transcription than isoform 1. Positively regulates the transcription of the core clock component ARNTL/BMAL1. .

1. Gaynor, R. B., Shieh, B.-H., Klisak, I., Sparkes, R. S., Lusis, A. J.Localization of the transcription factor SP1 gene to human chromosome 12q12-q13.2.Cytogenet. Cell Genet. 64: 210-212, 1993. 2. Matera, A. G., Ward, D. C.Localization of the human Sp1 transcription factor gene to 12q13 by fluorescence in situ hybridization.Genomics 17: 793-794, 1993. 3. Wimmer, E. A., Jackle, H., Pfeifle, C., Cohen, S. M.A Drosophila homologue of human Sp1 is a head-specific segmentation gene.Nature 366: 690-694, 1993.Wimmer, E. A., Jackle, H., Pfeifle, C., Cohen, S. M.A Drosophila homologue of human Sp1 is a head-specific segmentation gene.Nature 366: 690-694, 1993.

Nucleus. Cytoplasm. Nuclear location is governed by glycosylated/phosphorylated states. Insulin promotes nuclear location, while glucagon favors cytoplasmic location.