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Protein

Polyubiquitin-B

Gene

UBB

Organism
Bos taurus (Bovine)
Status
Reviewed-Annotation score: Annotation score: 5 out of 5-Experimental evidence at protein leveli

Functioni

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-6-linked may be involved in DNA repair; 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, DNA-damage responses as well as in signaling processes leading to activation of the transcription factor NF-kappa-B. 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.By similarity

Miscellaneous

Ubiquitin is encoded by 4 different genes. Uba52 and Rps27a genes code for a single copy of ubiquitin fused to the ribosomal proteins L40 and S27a, respectively. UBB and UBC genes code for a polyubiquitin precursor with exact head to tail repeats, the number of repeats differ between species and strains.
For the sake of clarity sequence features are annotated only for the first chain, and are not repeated for each of the following chains.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Binding sitei54Activating enzyme1
Sitei68Essential for function1
Binding sitei72Activating enzyme1

GO - Biological processi

Names & Taxonomyi

Protein namesi
Recommended name:
Polyubiquitin-B
Cleaved into the following chain:
Gene namesi
Name:UBB
OrganismiBos taurus (Bovine)
Taxonomic identifieri9913 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaLaurasiatheriaCetartiodactylaRuminantiaPecoraBovidaeBovinaeBos
Proteomesi
  • UP000009136 Componenti: Chromosome 19

Subcellular locationi

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionGraphics by Christian Stolte; Source: COMPARTMENTS

Keywords - Cellular componenti

Cytoplasm, Nucleus

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00003961401 – 76UbiquitinAdd BLAST76
ChainiPRO_000039614177 – 152UbiquitinAdd BLAST76
ChainiPRO_0000396142153 – 228UbiquitinAdd BLAST76
ChainiPRO_0000396143229 – 304UbiquitinAdd BLAST76
PropeptideiPRO_00003961443051

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Cross-linki48Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)By similarity
Modified residuei65Phosphoserine; by PINK1By similarity1
Cross-linki76Glycyl lysine isopeptide (Gly-Lys) (interchain with K-? in acceptor proteins)
Cross-linki82Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)By similarity
Cross-linki87Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)By similarity
Cross-linki105Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)By similarity
Cross-linki124Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)By similarity
Cross-linki139Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)By similarity
Modified residuei141PhosphoserineBy similarity1

Post-translational modificationi

Ubiquitin: Phosphorylated at Ser-65 by PINK1 during mitophagy. Phosphorylated ubiquitin specifically binds and activates parkin (PRKN), triggering mitophagy. Phosphorylation does not affect E1-mediated E2 charging of ubiquitin but affects discharging of E2 enzymes to form polyubiquitin chains. It also affects deubiquitination by deubiquitinase enzymes such as USP30.By similarity

Keywords - PTMi

Isopeptide bond, Phosphoprotein, Ubl conjugation

Proteomic databases

PaxDbiP0CG53.
PeptideAtlasiP0CG53.
PRIDEiP0CG53.

Expressioni

Gene expression databases

BgeeiENSBTAG00000017246.

Interactioni

Binary interactionsi

Show more details

Protein-protein interaction databases

BioGridi158705. 2 interactors.
IntActiP0CG53. 10 interactors.
MINTiMINT-1486309.
STRINGi9913.ENSBTAP00000022919.

Structurei

3D structure databases

ProteinModelPortaliP0CG53.
SMRiP0CG53.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini1 – 76Ubiquitin-like 1PROSITE-ProRule annotationAdd BLAST76
Domaini77 – 152Ubiquitin-like 2PROSITE-ProRule annotationAdd BLAST76
Domaini153 – 228Ubiquitin-like 3PROSITE-ProRule annotationAdd BLAST76
Domaini229 – 304Ubiquitin-like 4PROSITE-ProRule annotationAdd BLAST76

Sequence similaritiesi

Belongs to the ubiquitin family.Curated

Keywords - Domaini

Repeat

Phylogenomic databases

eggNOGiKOG0001. Eukaryota.
COG5272. LUCA.
GeneTreeiENSGT00810000125435.
InParanoidiP0CG53.
KOiK04551.
OMAiVHENTRR.
OrthoDBiEOG091G178I.
TreeFamiTF300820.

Family and domain databases

InterProiView protein in InterPro
IPR019956. Ubiquitin.
IPR029071. Ubiquitin-rel_dom.
IPR019954. Ubiquitin_CS.
IPR000626. Ubiquitin_dom.
PfamiView protein in Pfam
PF00240. ubiquitin. 4 hits.
PRINTSiPR00348. UBIQUITIN.
SMARTiView protein in SMART
SM00213. UBQ. 4 hits.
SUPFAMiSSF54236. SSF54236. 4 hits.
PROSITEiView protein in PROSITE
PS00299. UBIQUITIN_1. 4 hits.
PS50053. UBIQUITIN_2. 4 hits.

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

P0CG53-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MQIFVKTLTG KTITLEVEPS DTIENVKAKI QDKEGIPPDQ QRLIFAGKQL
60 70 80 90 100
EDGRTLSDYN IQKESTLHLV LRLRGGMQIF VKTLTGKTIT LEVEPSDTIE
110 120 130 140 150
NVKAKIQDKE GIPPDQQRLI FAGKQLEDGR TLSDYNIQKE STLHLVLRLR
160 170 180 190 200
GGMQIFVKTL TGKTITLEVE PSDTIENVKA KIQDKEGIPP DQQRLIFAGK
210 220 230 240 250
QLEDGRTLSD YNIQKESTLH LVLRLRGGMQ IFVKTLTGKT ITLEVEPSDT
260 270 280 290 300
IENVKAKIQD KEGIPPDQQR LIFAGKQLED GRTLSDYNIQ KESTLHLVLR

LRGGC
Length:305
Mass (Da):34,308
Last modified:August 10, 2010 - v1
Checksum:i1E6C7878AE958E68
GO

Sequence cautioni

The sequence BAC56573 differs from that shown. Contaminating sequence. Sequence of unknown origin in the C-terminal part.Curated
The sequence BAC56573 differs from that shown. Reason: Erroneous initiation. Translation N-terminally shortened.Curated

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sequence conflicti133S → F in CAA79146 (PubMed:8382528).Curated1

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
Z18245 mRNA. Translation: CAA79146.1.
AB099044 mRNA. Translation: BAC56534.1.
AB099083 mRNA. Translation: BAC56573.1. Sequence problems.
BC114001 mRNA. Translation: AAI14002.1.
M62429 mRNA. Translation: AAA30720.1.
PIRiI45964.
S29853.
RefSeqiNP_776558.1. NM_174133.2.
UniGeneiBt.111403.
Bt.2878.

Genome annotation databases

EnsembliENSBTAT00000022919; ENSBTAP00000022919; ENSBTAG00000017246.
GeneIDi281370.
KEGGibta:281370.

Similar proteinsi

Entry informationi

Entry nameiUBB_BOVIN
AccessioniPrimary (citable) accession number: P0CG53
Secondary accession number(s): O97577
, P02248, P02249, P02250, P62990, P80169, Q01235, Q24K23, Q28169, Q28170, Q29120, Q3T0V5, Q3ZCE3, Q862C1, Q862F4, Q862M4, Q862T5, Q862X8, Q91887, Q91888
Entry historyiIntegrated into UniProtKB/Swiss-Prot: August 10, 2010
Last sequence update: August 10, 2010
Last modified: September 27, 2017
This is version 64 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Direct protein sequencing, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families