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SIAH1 recombinant protein :: Siah E3 Ubiquitin Protein Ligase 1 Recombinant Protein

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Catalog # MBS145061
Unit / Price
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  0.002 mg  /  $140 +1 FREE 8GB USB
  0.01 mg  /  $205 +1 FREE 8GB USB
  1 mg  /  $5,015 +6 FREE 8GB USB
SIAH1 recombinant protein
Product Name

Siah E3 Ubiquitin Protein Ligase 1 (SIAH1), Recombinant Protein

Popular Item
Full Product Name

Recombinant Human Siah E3 Ubiquitin Protein Ligase 1

Product Synonym Names
SIAH1 Human; Siah E3 Ubiquitin Protein Ligase 1 Human Recombinant; Siah E3 ubiquitin protein ligase 1; Seven in absentia homolog 1; seven in absentia homolog 1 (Drosophila); E3 ubiquitin-protein ligase SIAH1; HUMSIAH; hSIAH1; Siah-1a; SIAH1A; EC 6.3.2
Research Use Only
For Research Use Only. Not for use in diagnostic procedures.
3D Structure
ModBase 3D Structure for Q8IUQ4
E Coli
Greater than 95% as determined by SDS-PAGE.
The SIAH1 solution (0.25mg/1ml) contains 20mM Tris-HCl buffer (pH 8.0), 100mM NaCl, 1mM DTT and 40% glycerol.
Sterile Filtered colorless solution.
Other Notes
Small volumes of SIAH1 recombinant protein vial(s) may occasionally become entrapped in the seal of the product vial during shipment and storage. If necessary, briefly centrifuge the vial on a tabletop centrifuge to dislodge any liquid in the container`s cap. Certain products may require to ship with dry ice and additional dry ice fee may apply.
Related Product Information for
SIAH1 recombinant protein
Description: SIAH1 Human Recombinant produced in E Coli is a single polypeptide chain containing 216 amino acids (90-282) and having a molecular mass of 24.1 kDa.SIAH1 is fused to a 23 amino acid His-tag at N-terminus & purified by proprietary chromatographic techniques.

Introduction: E3 ubiquitin-protein ligase SIAH1 (SIAH1) belongs to the SIAH (seven in absentia homolog) family. SIAH1 is a tumor suppressor protein, which is expressed in intestinal epithelium and activated during apoptosis. SIAH1 is involved in ubiquitination and proteasome-mediated degradation of specific proteins. SIAH1 is comprised of an N-terminal RING-finger domain (required for proteolysis) and a cystein-rich C-terminal domain (which regulates oligomerization and SIAH binding to target proteins). SIAH1 causes indirect degradation of beta-catenin by way of creation of a complex with Siah-interacting protein (SIP), Skp1 and Ebi.
Product Categories/Family for SIAH1 recombinant protein
NCBI/Uniprot data below describe general gene information for SIAH1. It may not necessarily be applicable to this product.
NCBI Accession #
NCBI GenBank Nucleotide #
UniProt Primary Accession #
UniProt Secondary Accession #
UniProt Related Accession #
Molecular Weight
21,215 Da
NCBI Official Full Name
E3 ubiquitin-protein ligase SIAH1 isoform b
NCBI Official Synonym Full Names
siah E3 ubiquitin protein ligase 1
NCBI Official Symbol
SIAH1  [Similar Products]
NCBI Official Synonym Symbols
  [Similar Products]
NCBI Protein Information
E3 ubiquitin-protein ligase SIAH1; seven in absentia homolog 1; siah-1a
UniProt Protein Name
E3 ubiquitin-protein ligase SIAH1
UniProt Synonym Protein Names
Seven in absentia homolog 1; Siah-1; Siah-1a
UniProt Gene Name
SIAH1  [Similar Products]
UniProt Synonym Gene Names
HUMSIAH; Siah-1  [Similar Products]
UniProt Entry Name
NCBI Summary for SIAH1
This gene encodes a protein that is a member of the seven in absentia homolog (SIAH) family. The protein is an E3 ligase and is involved in ubiquitination and proteasome-mediated degradation of specific proteins. The activity of this ubiquitin ligase has been implicated in the development of certain forms of Parkinson's disease, the regulation of the cellular response to hypoxia and induction of apoptosis. Alternative splicing results in several additional transcript variants, some encoding different isoforms and others that have not been fully characterized. [provided by RefSeq, Jul 2008]
UniProt Comments for SIAH1
SIAH1: E3 ubiquitin-protein ligase that mediates ubiquitination and subsequent proteasomal degradation of target proteins. E3 ubiquitin ligases accept ubiquitin from an E2 ubiquitin- conjugating enzyme in the form of a thioester and then directly transfers the ubiquitin to targeted substrates. Mediates E3 ubiquitin ligase activity either through direct binding to substrates or by functioning as the essential RING domain subunit of larger E3 complexes. Triggers the ubiquitin-mediated degradation of many substrates, including proteins involved in transcription regulation (MYB, POU2AF1, PML and RBBP8), a cell surface receptor (DCC), the cell-surface receptor-type tyrosine kinase FLT3, the cytoplasmic signal transduction molecules (KLF10/TIEG1 and NUMB), an antiapoptotic protein (BAG1), a microtubule motor protein (KIF22), a protein involved in synaptic vesicle function in neurons (SYP), a structural protein (CTNNB1) and SNCAIP. Confers constitutive instability to HIPK2 through proteasomal degradation. It is thereby involved in many cellular processes such as apoptosis, tumor suppression, cell cycle, axon guidance, transcription regulation, spermatogenesis and TNF-alpha signaling. Has some overlapping function with SIAH2. Induces apoptosis in cooperation with PEG3. Upon nitric oxid (NO) generation that follows apoptotic stimulation, interacts with S- nitrosylated GAPDH, mediating the translocation of GAPDH to the nucleus. GAPDH acts as a stabilizer of SIAH1, facilitating the degradation of nuclear proteins. Homodimer. Interacts with group 1 glutamate receptors GRM1 and GRM5. Interacts with DAB1, which may inhibit its activity. Interacts with UBE2E2. Interacts with PEG3. Interacts with GAPDH; leading to stabilize SIAH1. Component of some large E3 complex composed of UBE2D1, SIAH1, CACYBP/SIP, SKP1, APC and TBL1X. Interacts with UBE2I. Interacts with alpha- tubulin. Interacts with PEG10, which may inhibit its activity. Interacts with KHDRBS3. Interacts with SNCAIP and HIPK2. May be induced by p53/TP53, suggesting that it may be required to modulate p53/TP53 response. The relevance of such activity in vivo is however unclear and may not exist. Widely expressed at a low level. Down- regulated in advanced hepatocellular carcinomas. Inhibited by interaction with SNCAIP (isoform 2, but not isoform 1). May be inhibited by interaction with PEG10. Belongs to the SINA (Seven in absentia) family. 3 isoforms of the human protein are produced by alternative splicing.

Protein type: Cell development/differentiation; EC 6.3.2.-; Ubiquitin conjugating system; Apoptosis; Motility/polarity/chemotaxis; Ligase; EC; Ubiquitin ligase

Chromosomal Location of Human Ortholog: 16q12.1

Cellular Component: early endosome; cytoplasm; plasma membrane; beta-catenin destruction complex; nucleus; cytosol

Molecular Function: protein C-terminus binding; protein binding; zinc ion binding; ubiquitin-protein ligase activity; ligase activity

Biological Process: ubiquitin-dependent protein catabolic process; proteasomal ubiquitin-dependent protein catabolic process; nervous system development; axon guidance; anatomical structure morphogenesis; protein destabilization; apoptosis; positive regulation of apoptosis; protein ubiquitination during ubiquitin-dependent protein catabolic process; cell cycle; neuron apoptosis; protein catabolic process; spermatogenesis
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