UB221: UBE2S




UBE2S (also known as E2-24K or E2-EPF) is an E2 conjugating enzyme that is involved in the ubiquitylation of target substrates along with E1 and E3 enzymes. It has been implicated in the ubiquitylation of anaphase-promoting complex (APC/C), promoting the elongation of K11-linked polyubiquitin chains on this substrate, after initial ubiquitylation by either UBE2C or UBE2D1. This polyubiquitin chain elongation enhances the degradation of APC/C by the proteasome. UBE2S also targets von Hippel-Lindau (VHL) for proteasome degradation, resulting in the stabilization of HIF-1a.


Species Human
Source E. coli
Tag None
Molecular Weight 23,845.7 Da
Quantity 0.8 nmol, 3.0 nmol
Concentration 40 µM
Formulation 20 mM Tris pH 7.4, 150 mM NaCl, 10% glycerol, 10 mM DTT
Storage -80°C, avoid freeze/thaw cycles

Additional information


0.8 nmol, 3 nmol


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  • Identify cognate E2/E3 pairs
  • Characterize upregulation/downregulation of E2 enzymes
  • Build poly-ubiquitin chains
  • Characterize ubiquitin chain specificity of E2 enzymes
  • Analyze expression of E2 enzymes


  • Untagged (native) E2 conjugation enzyme