Ubiquitin C
mammalian protein found in Homo sapiens
Polyubiquitin-C is a protein encoded by the UBC gene in humans. Polyubiquitin-C is one of the sources of ubiquitin, along with UBB, UBA52, and RPS27A.
UBC gene is one of the two stress-regulated polyubiquitin genes (UBB and UBC) in mammals. It plays a key role in maintaining cellular ubiquitin levels under stress conditions. Defects of UBC gene could lead to mid-gestation embryonic lethality.
Structure
Gene
UBC gene is located at chromosome 12q24.3, consisting of 2 exons. The promoter of the UBC gene contains putative heat shock elements (HSEs), which mediates UBC induction upon stress. UBC gene differs from UBB gene in the number of Ub coding units they contain. Nine to ten Ub units were in the UBC gene.
Protein
In polyubiquitin-C, the C-terminus of a given ubiquitin molecule is covalently conjugated to either the N-terminal residue or one of seven lysine residues of another ubiquitin molecule. Different linking of ubiquitin chains results in distinct conformations.
The public source identifies “Ubiquitin C” as mammalian protein found in Homo sapiens. This brief keeps that definition visible, then builds a research path around Ubiquitin, mammalian and protein.
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This entry incorporates text from “Ubiquitin C” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.