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SIAH2

siah E3 ubiquitin protein ligase 2

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 (POU2AF1, PML, NCOR1), a cell surface receptor (DCC), an antiapoptotic protein (BAG1), and a protein involved in synaptic vesicle function in neurons (SYP). Mediates ubiquitination and proteasomal degradation of DYRK2 in response to hypoxia. It is thereby involved in apoptosis, tumor suppression, cell cycle, transcription and signaling processes. Has some overlapping function with SIAH1. Triggers the ubiquitin-mediated degradation of TRAF2, whereas SIAH1 can not. Promotes monoubiquitination of SNCA.

Gene Name: siah E3 ubiquitin protein ligase 2
Synonyms: SIAH2, HSiah2, Seven in absentia homolog 2, Siah-2
Target Sequences: NM_005067 NP_005058.3 O43255

Publications (3)

1
Inhibition of RAS-mediated transformation and tumorigenesis by targeting the downstream E3 ubiquitin ligase seven in absentia homologue. Schmidt RL, Park CH, Ahmed AU, Gundelach JH, Reed NR, Cheng S, Knudsen BE, Tang AH. Cancer research. 2007 67:11798-810. (ICC, IHC, WB, Flo) [PubMed:18089810]
2
Effect of disrupting seven-in-absentia homolog 2 function on lung cancer cell growth. Ahmed AU, Schmidt RL, Park CH, Reed NR, Hesse SE, Thomas CF, Molina JR, Deschamps C, Yang P, Aubry MC, Tang AH. Journal of the National Cancer Institute. 2008 100:1606-29. (IHC, WB) [PubMed:19001609] [PMC:PMC2720765]
3
The expression of the ubiquitin ligase SIAH2 (seven in absentia homolog 2) is mediated through gene copy number in breast cancer and is associated with a basal-like phenotype and p53 expression. Chan P, Mller A, Liu MC, Sceneay JE, Wong CS, Waddell N, Huang KT, Dobrovic A, Millar EK, O'Toole SA, McNeil CM, Sutherland RL, Bowtell DD, Fox SB. Breast cancer research : BCR. 2011 13:R19. (IHC; Human) [PubMed:21306611] [PMC:PMC3109588]

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SIAH2 (5)
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SIAH2 Protein - 12.5% SDS-PAGE of human SIAH2 stained with Coomassie Blue
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Wheat Germ Extract
GST
61 kDa
10 µg/$479; 25 µg/$670
SIAH2 Protein - 12.5% SDS-PAGE Stained with Coomassie Blue.
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Wheat Germ Extract
GST, N-terminus
10 µg/$479; 25 µg/$670
SIAH2 Protein - Western validation with an anti-DDK antibody * L: Control HEK293 lysate R: Over-expression lysate
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293T Cells
Myc-DDK (Flag)
34.4 kDa
20 µg/$150
SIAH2 Protein - Purified recombinant protein SIAH2 was analyzed by SDS-PAGE gel and Coomassie Blue Staining
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HEK 293 Cells
Myc-DDK (Flag)
34.4 kDa
20 µg/$1,107
SIAH2 Protein - Western validation with an anti-DDK antibody * L: Control HEK293 lysate R: Over-expression lysate
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HEK 293 Cells
Myc-DDK (Flag)
34.4 kDa
100 µg/$494
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The data on this page has been compiled from LifeSpan internal sources, the National Center for Biotechnology Information (NCBI), and The Universal Protein Resource (UniProt).