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HR6A/UBE2A: Products

Homolog of Rad6 A (HR6A), also known as Ubiquitin-conjugating Enzyme E2A (UBE2A), is a ubiquitously expressed member of the Ubiquitin-conjugating (E2) enzyme family that is highly expressed in the brain and heart. HR6A/UBE2A has a predicted molecular weight of 17 kDa. The human protein shares 100% amino acid sequence identity with the mouse and rat orthologs. Like other E2 family members, HR6A/UBE2A has an E2 catalytic core domain that contains an active site cysteine residue required for the formation of a thioester bond with Ubiquitin. HR6A/UBE2A is involved in many cellular processes including protein degradation, transcriptional regulation, and the DNA damage response. HR6A/UBE2A functions with the UBR2 Ubiquitin ligase (E3) to mediate ubiquitination of target substrates degraded through the N-end rule proteolytic pathway. HR6A/UBE2A also interacts with the human BRE1 E3 to ubiquitinate Histone H2B on Lys120, which promotes transcription via methylation of Histone H3 on Lys4. HR6A/UBE2A is activated via phosphorylation on Ser120 by CDK9 following exposure to UVC irradiation and HR6A/UBE2A-RAD18-dependent ubiquitination of PCNA is required for DNA damage tolerance. HR6A/UBE2A also regulates the mRNA and protein levels of p53. Physiologically, this enzyme is required in female mice for the production of viable offspring. Mutations in human HR6A/UBE2A cause UBE2A deficiency syndrome in males, which is characterized by intellectual disability, seizures, absent speech, and urogenital and skin anomalies.

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Recombinant Human His6-HR6A/UBE2A Protein, CF

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