Ubiquitin B

Ubiquitin B
PDB rendering based on 1aar.
Available structures PDB Ortholog search: PDBe, RCSB List of PDB id codes 2Y5B, 3ZLZ, 3ZNH, 3ZNZ
Identifiers
Symbols	UBB; RPS27A; UBA52; UBC
External IDs	OMIM: 191339 HomoloGene: 75104 GeneCards: UBB Gene
Gene Ontology Molecular function • protein binding Cellular component • nucleoplasm • cytosol • endosome membrane • endocytic vesicle membrane Biological process • cell cycle checkpoint • G1 phase of mitotic cell cycle • G1/S transition of mitotic cell cycle • S phase of mitotic cell cycle • M phase of mitotic cell cycle • mitotic anaphase • negative regulation of transcription from RNA polymerase II promoter • activation of MAPK activity • protein polyubiquitination • mitotic cell cycle • toll-like receptor signaling pathway • antigen processing and presentation of peptide antigen via MHC class I • antigen processing and presentation of exogenous peptide antigen via MHC class I, TAP-dependent • MyD88-dependent toll-like receptor signaling pathway • MyD88-independent toll-like receptor signaling pathway • DNA repair • transcription, DNA-dependent • transcription initiation from RNA polymerase II promoter • apoptotic process • DNA damage response, signal transduction by p53 class mediator resulting in cell cycle arrest • epidermal growth factor receptor signaling pathway • transforming growth factor beta receptor signaling pathway • Notch signaling pathway • Notch receptor processing • I-kappaB kinase/NF-kappaB cascade • JNK cascade • fibroblast growth factor receptor signaling pathway • gene expression • viral reproduction • cellular membrane organization • RNA metabolic process • mRNA metabolic process • endosomal transport • virion assembly • viral protein processing • cytokine-mediated signaling pathway • viral reproductive process • negative regulation of transforming growth factor beta receptor signaling pathway • anaphase-promoting complex-dependent proteasomal ubiquitin-dependent protein catabolic process • negative regulation of type I interferon production • positive regulation of type I interferon production • cellular response to stress • toll-like receptor 2 signaling pathway • toll-like receptor 3 signaling pathway • toll-like receptor 4 signaling pathway • toll-like receptor 5 signaling pathway • toll-like receptor 9 signaling pathway • toll-like receptor 10 signaling pathway • ion transmembrane transport • TRIF-dependent toll-like receptor signaling pathway • nucleotide-binding domain, leucine rich repeat containing receptor signaling pathway • toll-like receptor TLR1:TLR2 signaling pathway • toll-like receptor TLR6:TLR2 signaling pathway • negative regulation of epidermal growth factor receptor signaling pathway • antigen processing and presentation of exogenous peptide antigen via MHC class I • regulation of apoptotic process • negative regulation of apoptotic process • positive regulation of I-kappaB kinase/NF-kappaB cascade • innate immune response • positive regulation of transcription from RNA polymerase II promoter • egress of virus within host cell • neurotrophin TRK receptor signaling pathway • T cell receptor signaling pathway • positive regulation of NF-kappaB transcription factor activity • stress-activated MAPK cascade • negative regulation of ubiquitin-protein ligase activity involved in mitotic cell cycle • positive regulation of ubiquitin-protein ligase activity involved in mitotic cell cycle • regulation of ubiquitin-protein ligase activity involved in mitotic cell cycle • transmembrane transport • regulation of transcription from RNA polymerase II promoter in response to hypoxia • nucleotide-binding oligomerization domain containing signaling pathway • cellular response to hypoxia • apoptotic signaling pathway Sources: Amigo / QuickGO
RNA expression pattern
More reference expression data
Orthologs
Species	Human	Mouse
Entrez	7314	n/a
Ensembl	ENSG00000170315	n/a
UniProt	P0CG47	n/a
RefSeq (mRNA)	NM_018955	n/a
RefSeq (protein)	NP_061828	n/a
Location (UCSC)	Chr 17: 16.28 – 16.29 Mb	n/a
PubMed search		n/a
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Ubiquitin is a protein that in humans is encoded by the UBB gene.^[1]

Function

Ubiquitin is one of the most conserved proteins known in eukaryotic organisms. Ubiquitin is required for ATP-dependent, non-lysosomal intracellular protein degradation of abnormal proteins and normal proteins with a rapid turnover. Ubiquitin is covalently bound to proteins to be degraded, and presumably labels these proteins for degradation. Ubiquitin also binds to histone H2A in actively transcribed regions but does not cause histone H2A degradation, suggesting that ubiquitin is also involved in regulation of gene expression. This gene consists of three direct repeats of the ubiquitin coding sequence with no spacer sequence. Consequently, the protein is expressed as a polyubiquitin precursor with a final amino acid after the last repeat. Aberrant form of this protein (UBB+1) has been noticed in patients with Alzheimer's disease, Down syndrome, other tauopathies (e.g. Pick's disease) and polyglutamine disease (e.g. Huntington's disease).^[2][3]

References

Further reading

v t e PDB gallery 1aar: STRUCTURE OF A DIUBIQUITIN CONJUGATE AND A MODEL FOR INTERACTION WITH UBIQUITIN CONJUGATING ENZYME (E2)  1cmx: STRUCTURAL BASIS FOR THE SPECIFICITY OF UBIQUITIN C-TERMINAL HYDROLASES  1d3z: UBIQUITIN NMR STRUCTURE  1f9j: STRUCTURE OF A NEW CRYSTAL FORM OF TETRAUBIQUITIN  1fxt: STRUCTURE OF A CONJUGATING ENZYME-UBIQUITIN THIOLESTER COMPLEX  1g6j: STRUCTURE OF RECOMBINANT HUMAN UBIQUITIN IN AOT REVERSE MICELLES  1gjz: SOLUTION STRUCTURE OF A DIMERIC N-TERMINAL FRAGMENT OF HUMAN UBIQUITIN  1nbf: Crystal structure of a UBP-family deubiquitinating enzyme in isolation and in complex with ubiquitin aldehyde  1ogw: SYNTHETIC UBIQUITIN WITH FLUORO-LEU AT 50 AND 67  1otr: Solution Structure of a CUE-Ubiquitin Complex  1p3q: Mechanism of Ubiquitin Recognition by the CUE Domain of VPS9  1q0w: Solution structure of Vps27 amino-terminal UIM-ubiquitin complex  1q5w: Ubiquitin Recognition by Npl4 Zinc-Fingers  1s1q: TSG101(UEV) domain in complex with Ubiquitin  1sif: Crystal structure of a multiple hydrophobic core mutant of ubiquitin  1tbe: STRUCTURE OF TETRAUBIQUITIN SHOWS HOW MULTIUBIQUITIN CHAINS CAN BE FORMED  1ubi: SYNTHETIC STRUCTURAL AND BIOLOGICAL STUDIES OF THE UBIQUITIN SYSTEM. PART 1  1ubq: STRUCTURE OF UBIQUITIN REFINED AT 1.8 ANGSTROMS RESOLUTION  1ud7: SOLUTION STRUCTURE OF THE DESIGNED HYDROPHOBIC CORE MUTANT OF UBIQUITIN, 1D7  1uzx: A COMPLEX OF THE VPS23 UEV WITH UBIQUITIN  1v80: Solution structures of ubiquitin at 30 bar and 3 kbar  1v81: Solution structures of ubiquitin at 30 bar and 3 kbar  1wr1: The complex structure of Dsk2p UBA with ubiquitin  1wr6: Crystal structure of GGA3 GAT domain in complex with ubiquitin  1wrd: Crystal structure of Tom1 GAT domain in complex with ubiquitin  1xd3: Crystal structure of UCHL3-UbVME complex  1xqq: Simultaneous determination of protein structure and dynamics  1yd8: COMPLEX OF HUMAN GGA3 GAT DOMAIN AND UBIQUITIN  1yiw: X-ray Crystal Structure of a Chemically Synthesized Ubiquitin  1yj1: X-ray Crystal Structure of a Chemically Synthesized [D-Gln35]Ubiquitin  1yx5: Solution Structure of S5a UIM-1/Ubiquitin Complex  1yx6: Solution Structure of S5a UIM-2/Ubiquitin Complex  1zgu: Solution structure of the human Mms2-Ubiquitin complex  2ayo: Structure of USP14 bound to ubquitin aldehyde  2bgf: NMR STRUCTURE OF LYS48-LINKED DI-UBIQUITIN USING CHEMICAL SHIFT PERTURBATION DATA TOGETHER WITH RDCS AND 15N-RELAXATION DATA  2c7m: HUMAN RABEX-5 RESIDUES 1-74 IN COMPLEX WITH UBIQUITIN  2c7n: HUMAN RABEX-5 RESIDUES 1-74 IN COMPLEX WITH UBIQUITIN  2d3g: Double sided ubiquitin binding of Hrs-UIM  2den: Solution Structure of the Ubiquitin-Associated Domain of Human BMSC-UbP and its Complex with Ubiquitin  2dx5: The complex structure between the mouse EAP45-GLUE domain and ubiquitin  2fcm: X-ray Crystal Structure of a Chemically Synthesized [D-Gln35]Ubiquitin with a Cubic Space Group  2fcn: X-ray Crystal Structure of a Chemically Synthesized [D-Val35]Ubiquitin with a Cubic Space Group  2fcq: X-ray Crystal Structure of a Chemically Synthesized Ubiquitin with a Cubic Space Group  2fcs: X-ray Crystal Structure of a Chemically Synthesized [L-Gln35]Ubiquitin with a Cubic Space Group  2fid: Crystal Structure of a Bovine Rabex-5 fragment complexed with ubiquitin  2fif: Crystal Structure of a Bovine Rabex-5 fragment complexed with ubiquitin  2fuh: Solution Structure of the UbcH5c/Ub Non-covalent Complex  2g3q: Solution Structure of Ede1 UBA-ubiquitin complex  2g45: Co-crystal structure of znf ubp domain from the deubiquitinating enzyme isopeptidase T (isot) in complex with ubiquitin  2gbj: Crystal Structure of the 9-10 8 Glycine Insertion Mutant of Ubiquitin.  2gbk: Crystal Structure of the 9-10 MoaD Insertion Mutant of Ubiquitin  2gbm: Crystal Structure of the 35-36 8 Glycine Insertion Mutant of Ubiquitin  2gbn: Crystal Structure of the 35-36 8 Glycine Insertion Mutant of Ubiquitin  2gbr: Crystal Structure of the 35-36 MoaD Insertion Mutant of Ubiquitin  2gmi: Mms2/Ubc13~Ubiquitin  2hd5: USP2 in complex with ubiquitin  2hth: Structural basis for ubiquitin recognition by the human EAP45/ESCRT-II GLUE domain  2ibi: Covalent Ubiquitin-USP2 Complex  2j7q: CRYSTAL STRUCTURE OF THE UBIQUITIN-SPECIFIC PROTEASE ENCODED BY MURINE CYTOMEGALOVIRUS TEGUMENT PROTEIN M48 IN COMPLEX WITH A UBQUITIN-BASED SUICIDE SUBSTRATE  2nr2: The MUMO (minimal under-restraining minimal over-restraining) method for the determination of native states ensembles of proteins  2o6v: Crystal structure and solution NMR studies of Lys48-linked tetraubiquitin at neutral pH  2oob: crystal structure of the UBA domain from Cbl-b ubiquitin ligase in complex with ubiquitin