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Ubiquitin E1 Enzyme/UBE1L2: Products

Ubiquitin-activating Enzyme 1-like 2 (UBE1L2), also known as Ubiquitin-like Modifier Activating Enzyme 6 (UBA6), is a 1052 amino acid (aa) member of the Ubiquitin-activating (E1) enzyme family with a predicted molecular weight of 118 kDa. The mouse and rat UBE1L2/UBA6 orthologs share 88% aa sequence identity with the human protein. UBE1L2/UBA6 is expressed in vertebrate cells where four isoforms have been identified. UBE1L2/UBA6 is an activating enzyme for both Ubiquitin and FAT10 via a similar molecular mechanism but has a higher affinity for FAT10 than for Ubiquitin. UBE1L2/UBA6 contains an ATP-binding motif and an active site cysteine residue, Cys625 in humans, common to E1 enzymes. It shares 40% aa sequence identity with the related family member Ubiquitin Activating Enzyme/UBE1. Similar to UBE1, UBE1L2/UBA6 can transfer activated Ubiquitin to Ubiquitin-conjugating (E2) enzymes including the UbcH5 isoforms and UbcH7. Unlike UBE1, which can transfer Ubiquitin to the cell cycle-associated E2 enzyme, UbcH3, UBE1L2/UBA6 can transfer Ubiquitin to Use1/UBE2Z, an E2 enzyme that cannot be charged with Ubiquitin by UBE1. UBE1L2/UBA6-initiated covalent linkage of FAT10 to protein targets results in proteasomal degradation. UBE1L2/UBA6 is essential for embryonic development. One isoform, nUBE1L, is highly expressed in human testis and may play a role in spermatogenesis and male fertility.

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Recombinant Human GST-Ubiquitin E1 Enzyme (UBE1L2/UBA6), CF

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