Human SP1 (phospho T453) peptide (ab38350)

製品の概要

製品の詳細

  • 由来
    Synthetic

特性

Our Abpromise guarantee covers the use of ab38350 in the following tested applications.

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

  • アプリケーション

    Blocking - Blocking peptide for Anti-SP1 (phospho T453) antibody (ab37707)

  • 精製度
    70 - 90% by HPLC.

  • 製品の状態
    Liquid
  • 備考

    - First try to dissolve a small amount of peptide in either water or buffer. The more charged residues on a peptide, the more soluble it is in aqueous solutions.
    - If the peptide doesn’t dissolve try an organic solvent e.g. DMSO, then dilute using water or buffer.
    - Consider that any solvent used must be compatible with your assay. If a peptide does not dissolve and you need to recover it, lyophilise to remove the solvent.
    - Gentle warming and sonication can effectively aid peptide solubilisation. If the solution is cloudy or has gelled the peptide may be in suspension rather than solubilised.
    - Peptides containing cysteine are easily oxidised, so should be prepared in solution just prior to use.

  • Concentration information loading...

前処理および保存

  • 保存方法および安定性

    Shipped at 4°C. Upon delivery aliquot and store at -20°C or -80°C. Avoid repeated freeze / thaw cycles.

    Information available upon request.

関連情報

  • 別名
    • SP 1
    • SP1
    • Sp1 transcription factor
    • SP1_HUMAN
    • Specificity protein 1
    • Transcription factor Sp1
    • TSFP 1
    • TSFP1
    see all
  • 機能
    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.
  • 組織特異性
    Up-regulated in adenocarcinomas of the stomach (at protein level).
  • 配列類似性
    Belongs to the Sp1 C2H2-type zinc-finger protein family.
    Contains 3 C2H2-type zinc fingers.
  • 翻訳後修飾
    Phosphorylated on multiple serine and threonine residues. Phosphorylation is coupled to ubiquitination, sumoylation and proteolytic processing. Phosphorylation on Ser-59 enhances proteolytic cleavage. Phosphorylation on Ser-7 enhances ubiquitination and protein degradation. Hyperphosphorylation on Ser-101 in response to DNA damage has no effect on transcriptional activity. MAPK1/MAPK3-mediated phosphorylation on Thr-453 and Thr-739 enhances VEGF transcription but, represses FGF2-triggered PDGFR-alpha transcription. Also implicated in the repression of RECK by ERBB2. Hyperphosphorylated on Thr-278 and Thr-739 during mitosis by MAPK8 shielding SP1 from degradation by the ubiquitin-dependent pathway. Phosphorylated in the zinc-finger domain by calmodulin-activated PKCzeta. Phosphorylation on Ser-641 by PKCzeta is critical for TSA-activated LHR gene expression through release of its repressor, p107. Phosphorylation on Thr-668, Ser-670 and Thr-681 is stimulated by angiotensin II via the AT1 receptor inducing increased binding to the PDGF-D promoter. This phosphorylation is increased in injured artey wall. Ser-59 and Thr-681 can both be dephosphorylated by PP2A during cell-cycle interphase. Dephosphorylation on Ser-59 leads to increased chromatin association during interphase and increases the transcriptional activity. On insulin stimulation, sequentially glycosylated and phosphorylated on several C-terminal serine and threonine residues.
    Acetylated. Acetylation/deacetylation events affect transcriptional activity. Deacetylation leads to an increase in the expression the 12(s)-lipooxygenase gene though recruitment of p300 to the promoter.
    Ubiquitinated. Ubiquitination occurs on the C-terminal proteolytically-cleaved peptide and is triggered by phosphorylation.
    Sumoylated by SUMO1. Sumoylation modulates proteolytic cleavage of the N-terminal repressor domain. Sumoylation levels are attenuated during tumorigenesis. Phosphorylation mediates SP1 desumoylation.
    Proteolytic cleavage in the N-terminal repressor domain is prevented by sumoylation. The C-terminal cleaved product is susceptible to degradation.
    O-glycosylated; contains at least 8 N-acetylglucosamine side chains. Levels are controlled by insulin and the SP1 phosphorylation states. Insulin-mediated O-glycosylation locates SP1 to the nucleus, where it is sequentially deglycosylated and phosphorylated. O-glycosylation affects transcriptional activity through disrupting the interaction with a number of transcription factors including ELF1 and NFYA. Also inhibits interaction with the HIV1 promoter. Inhibited by peroxisomome proliferator receptor gamma (PPARgamma).
  • 細胞内局在
    Nucleus. Cytoplasm. Nuclear location is governed by glycosylated/phosphorylated states. Insulin promotes nuclear location, while glucagon favors cytoplasmic location.
  • Information by UniProt

画像

  • All lanes : Anti-SP1 (phospho T453) antibody (ab37707) at 1 µg/ml

    Lane 1 : HeLa (Human epithelial carcinoma cell line) Whole Cell Lysate
    Lane 2 : Jurkat (Human T cell lymphoblast-like cell line) Whole Cell Lysate
    Lane 3 : HeLa (Human epithelial carcinoma cell line) Whole Cell Lysate with Human SP1 (phospho T453) peptide (ab38350) at 1 µg/ml
    Lane 4 : Jurkat (Human T cell lymphoblast-like cell line) Whole Cell Lysate with Human SP1 (phospho T453) peptide (ab38350) at 1 µg/ml
    Lane 5 : HeLa (Human epithelial carcinoma cell line) Whole Cell Lysate with Human SP1 peptide (ab42654) at 1 µg/ml
    Lane 6 : Jurkat (Human T cell lymphoblast-like cell line) Whole Cell Lysate with Human SP1 peptide (ab42654) at 1 µg/ml

    Lysates/proteins at 10 µg per lane.

    Secondary
    Goat polyclonal to Rabbit IgG - H&L - Pre-Adsorbed (HRP) at 1/3000 dilution
    Developed using the ECL technique

    Performed under reducing conditions.

    Predicted band size : 81 kDa
    Observed band size : 120 kDa (why is the actual band size different from the predicted?)
    Additional bands at : >250 kDa. We are unsure as to the identity of these extra bands.

    Exposure time : 10 minutes

参考文献

ab38350 has not yet been referenced specifically in any publications.

レビューと Q&A

Thank you for contacting us.

The link to the protocol for blocking with the immunogen peptide can be found here:

http://www.abcam.com/index.html?pageconfig=resource&rid=11378

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Please note: All products are "FOR RESEARCH USE ONLY AND ARE NOT INTENDED FOR DIAGNOSTIC OR THERAPEUTIC USE"

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