NCBI Accession #
NP_001118922.1
NCBI GenBank Nucleotide #
NM_001125450.2
NCBI Official Full Name
Ubiquitin family protein
NCBI Official Symbol
UBQ14
NCBI Official Synonym Symbols
T5J8.21; T5J8_21
NCBI Protein Information
Ubiquitin family protein
NCBI Summary
Polyubiquitin gene containing 4 ubiquitin repeats.
UniProt Protein Name
Polyubiquitin 10
UniProt Primary Accession #
Q8H159
UniProt Secondary Accession #
O80715; P59263; Q38875; Q9LDJ2; Q9LYW1; Q9M0W3; Q9M1P9; Q9S7X3
UniProt Related Accession #
P0CH33; Q3E7T8; G85036
UniProt Comments
Ubiquitin exists either covalently attached to another protein, or free (unanchored). When covalently bound, it is conjugated to target proteins via an isopeptide bond either as a monomer (monoubiquitin), a polymer linked via different Lys residues of the ubiquitin (polyubiquitin chains) or a linear polymer linked via the initiator Met of the ubiquitin (linear polyubiquitin chains). Polyubiquitin chains, when attached to a target protein, have different functions depending on the Lys residue of the ubiquitin that is linked: Lys-11-linked is involved in ERAD (endoplasmic reticulum-associated degradation) and in cell-cycle regulation; Lys-29-linked is involved in lysosomal degradation; Lys-33-linked is involved in kinase modification; Lys-48-linked is involved in protein degradation via the proteasome; Lys-63-linked is involved in endocytosis, and DNA-damage responses. Linear polymer chains formed via attachment by the initiator Met lead to cell signaling. Ubiquitin is usually conjugated to Lys residues of target proteins, however, in rare cases, conjugation to Cys or Ser residues has been observed. When polyubiquitin is free (unanchored-polyubiquitin), it also has distinct roles, such as in activation of protein kinases, and in signaling .