P0CH32 (UBQ4_ARATH) Reviewed, UniProtKB/Swiss-Prot

Names and origin

Protein names

Recommended name:
Polyubiquitin 4

Cleaved into the following chain:

1. Ubiquitin

Gene names

Name:	UBQ4
Ordered Locus Names:	At5g20620
ORF Names:	T1M15.20

Organism

Arabidopsis thaliana (Mouse-ear cress) [Reference proteome]

Taxonomic identifier

3702 [NCBI]

Taxonomic lineage

cellular organisms › Eukaryota › Viridiplantae › Streptophyta › Streptophytina › Embryophyta › Tracheophyta › Euphyllophyta › Spermatophyta › Magnoliophyta › eudicotyledons › core eudicotyledons › rosids › malvids › Brassicales › Brassicaceae › Camelineae › Arabidopsis

Protein attributes

Sequence length	382 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is further processed into a mature form.
Protein existence	Evidence at protein level

General annotation (Comments)

Function	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 By similarity.
Subcellular location	Cytoplasm By similarity. Nucleus By similarity.
Miscellaneous	Ubiquitin is encoded by 16 different genes. Ubiquitin is generally synthesized as a polyubiquitin precursor with tandem head to tail repeats. Often, there is one to three additional amino-acids after the last repeat, removed in the mature protein. Alternatively, ubiquitin extension protein is synthesized as a single copy of ubiquitin fused to a ribosomal protein (either L40 or S27A) or to an ubiquitin-related protein (either RUB1 or RUB2). Following translation, extension protein is cleaved from ubiquitin. For the sake of clarity sequence features are annotated only for the first chain, and are not repeated for each of the following chains.
Sequence similarities	Belongs to the ubiquitin family. Contains 5 ubiquitin-like domains.

Ontologies

Keywords
Biological process	Ubl conjugation pathway
Cellular component	Cytoplasm Nucleus
Domain	Repeat
PTM	Isopeptide bond Ubl conjugation
Technical term	Complete proteome Reference proteome
Gene Ontology (GO)
Biological_process	ubiquitin-dependent protein catabolic process Traceable author statement Ref.2. Source: TAIR
Cellular_component	cytoplasm Inferred from electronic annotation. Source: UniProtKB-SubCell nucleus Inferred from electronic annotation. Source: UniProtKB-SubCell
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 76	76	Ubiquitin		PRO_0000396882
	Chain	77 – 152	76	Ubiquitin		PRO_0000396883
	Chain	153 – 228	76	Ubiquitin		PRO_0000396884
	Chain	229 – 304	76	Ubiquitin		PRO_0000396885
	Chain	305 – 380	76	Ubiquitin		PRO_0000396886
	Propeptide	381 – 382	2	Probable		PRO_0000396887
Regions
	Domain	1 – 76	76	Ubiquitin-like 1
	Domain	77 – 152	76	Ubiquitin-like 2
	Domain	153 – 228	76	Ubiquitin-like 3
	Domain	229 – 304	76	Ubiquitin-like 4
	Domain	305 – 380	76	Ubiquitin-like 5
Amino acid modifications
	Cross-link	11		Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin) Ref.5
	Cross-link	29		Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin) Ref.5
	Cross-link	33		Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin) Ref.5
	Cross-link	48		Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin) Ref.5
	Cross-link	63		Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin) Ref.5
	Cross-link	76		Glycyl lysine isopeptide (Gly-Lys) (interchain with K-? in acceptor proteins) By similarity

Sequences

	Sequence		Length	Mass (Da)
	P0CH32 [UniParc]. Last modified August 10, 2010. Version 1. Checksum: 13C8C4CB1176707C	FASTA	382	42,786
	10 20 30 40 50 60 MQIFVKTLTG KTITLEVESS DTIDNVKAKI QDKEGIPPDQ QRLIFAGKQL EDGRTLADYN 70 80 90 100 110 120 IQKESTLHLV LRLRGGMQIF VKTLTGKTIT LEVESSDTID NVKAKIQDKE GIPPDQQRLI 130 140 150 160 170 180 FAGKQLEDGR TLADYNIQKE STLHLVLRLR GGMQIFVKTL TGKTITLEVE SSDTIDNVKA 190 200 210 220 230 240 KIQDKEGIPP DQQRLIFAGK QLEDGRTLAD YNIQKESTLH LVLRLRGGMQ IFVKTLTGKT 250 260 270 280 290 300 ITLEVESSDT IDNVKAKIQD KEGIPPDQQR LIFAGKQLED GRTLADYNIQ KESTLHLVLR 310 320 330 340 350 360 LRGGMQIFVK TLTGKTITLE VESSDTIDNV KAKIQDKEGI PPDQQRLIFA GKQLEDGRTL 370 380 ADYNIQKEST LHLVLRLRGG SF

References

	« Hide 'large scale' referencesShow 'large scale' references »
[1]	"Characterization of a polyubiquitin gene from Arabidopsis thaliana." Burke T.J., Callis J., Vierstra R.D. Mol. Gen. Genet. 213:435-443(1988) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].
[2]	"Structure and evolution of genes encoding polyubiquitin and ubiquitin-like proteins in Arabidopsis thaliana ecotype Columbia." Callis J., Carpenter T., Sun C.W., Vierstra R.D. Genetics 139:921-939(1995) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA]. Strain: cv. Columbia.
[3]	"Sequence and analysis of chromosome 5 of the plant Arabidopsis thaliana." Tabata S., Kaneko T., Nakamura Y., Kotani H., Kato T., Asamizu E., Miyajima N., Sasamoto S., Kimura T., Hosouchi T., Kawashima K., Kohara M., Matsumoto M., Matsuno A., Muraki A., Nakayama S., Nakazaki N., Naruo K. , Okumura S., Shinpo S., Takeuchi C., Wada T., Watanabe A., Yamada M., Yasuda M., Sato S., de la Bastide M., Huang E., Spiegel L., Gnoj L., O'Shaughnessy A., Preston R., Habermann K., Murray J., Johnson D., Rohlfing T., Nelson J., Stoneking T., Pepin K., Spieth J., Sekhon M., Armstrong J., Becker M., Belter E., Cordum H., Cordes M., Courtney L., Courtney W., Dante M., Du H., Edwards J., Fryman J., Haakensen B., Lamar E., Latreille P., Leonard S., Meyer R., Mulvaney E., Ozersky P., Riley A., Strowmatt C., Wagner-McPherson C., Wollam A., Yoakum M., Bell M., Dedhia N., Parnell L., Shah R., Rodriguez M., Hoon See L., Vil D., Baker J., Kirchoff K., Toth K., King L., Bahret A., Miller B., Marra M.A., Martienssen R., McCombie W.R., Wilson R.K., Murphy G., Bancroft I., Volckaert G., Wambutt R., Duesterhoeft A., Stiekema W., Pohl T., Entian K.-D., Terryn N., Hartley N., Bent E., Johnson S., Langham S.-A., McCullagh B., Robben J., Grymonprez B., Zimmermann W., Ramsperger U., Wedler H., Balke K., Wedler E., Peters S., van Staveren M., Dirkse W., Mooijman P., Klein Lankhorst R., Weitzenegger T., Bothe G., Rose M., Hauf J., Berneiser S., Hempel S., Feldpausch M., Lamberth S., Villarroel R., Gielen J., Ardiles W., Bents O., Lemcke K., Kolesov G., Mayer K.F.X., Rudd S., Schoof H., Schueller C., Zaccaria P., Mewes H.-W., Bevan M., Fransz P.F. Nature 408:823-826(2000) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: cv. Columbia.
[4]	The Arabidopsis Information Resource (TAIR) Submitted (APR-2011) to the EMBL/GenBank/DDBJ databases Cited for: GENOME REANNOTATION. Strain: cv. Columbia.
[5]	"Multidimensional protein identification technology (MudPIT) analysis of ubiquitinated proteins in plants." Maor R., Jones A., Nuehse T.S., Studholme D.J., Peck S.C., Shirasu K. Mol. Cell. Proteomics 6:601-610(2007) [PubMed] [Europe PMC] [Abstract] Cited for: UBIQUITINATION [LARGE SCALE ANALYSIS] AT LYS-11; LYS-29; LYS-33; LYS-48 AND LYS-63, MASS SPECTROMETRY. Strain: cv. Landsberg erecta.

Cross-references

Sequence databases
EMBL GenBank DDBJ	X12853 Genomic DNA. Translation: CAA31331.1. U33014 Genomic DNA. Translation: AAB53929.1. AF296832 Genomic DNA. No translation available. CP002688 Genomic DNA. Translation: AED92867.1.
IPI	IPI00535543.
PIR	UQMUM. S01425.
RefSeq	NP_568397.1. NM_122069.3.
UniGene	At.26012. At.71604.
3D structure databases
ProteinModelPortal	P0CH32.
SMR	P0CH32. Positions 1-380.
ModBase	Search...
Proteomic databases
PRIDE	P0CH32.
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
EnsemblPlants	AT5G20620.1; AT5G20620.1; AT5G20620.
GeneID	832184.
KEGG	ath:AT5G20620.
Organism-specific databases
TAIR	At5g20620.
Phylogenomic databases
KO	K08770.
OMA	CSDNIEN.
Gene expression databases
ArrayExpress	P0CH32.
Family and domain databases
InterPro	IPR000626. Ubiquitin. IPR019954. Ubiquitin_CS. IPR019956. Ubiquitin_subgr. IPR019955. Ubiquitin_supergroup. [Graphical view]
Pfam	PF00240. ubiquitin. 5 hits. [Graphical view]
PRINTS	PR00348. UBIQUITIN.
SMART	SM00213. UBQ. 5 hits. [Graphical view]
PROSITE	PS00299. UBIQUITIN_1. 5 hits. PS50053. UBIQUITIN_2. 5 hits. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

UBQ4_ARATH

Accession

Primary (citable) accession number: P0CH32
Secondary accession number(s): O80715 , P59263, Q38875, Q9LDJ2, Q9LYW1, Q9M0W3, Q9M1P9, Q9S7X3

Entry history

Integrated into UniProtKB/Swiss-Prot:	August 10, 2010
Last sequence update:	August 10, 2010
Last modified:	May 1, 2013
This is version 20 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Plant Protein Annotation Program