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3AXC

Crystal structure of linear diubiquitin

Functional Information from GO Data
ChainGOidnamespacecontents
A0002181biological_processcytoplasmic translation
A0003723molecular_functionRNA binding
A0003735molecular_functionstructural constituent of ribosome
A0005515molecular_functionprotein binding
A0005615cellular_componentextracellular space
A0005634cellular_componentnucleus
A0005654cellular_componentnucleoplasm
A0005730cellular_componentnucleolus
A0005737cellular_componentcytoplasm
A0005741cellular_componentmitochondrial outer membrane
A0005783cellular_componentendoplasmic reticulum
A0005789cellular_componentendoplasmic reticulum membrane
A0005829cellular_componentcytosol
A0005840cellular_componentribosome
A0005886cellular_componentplasma membrane
A0006412biological_processtranslation
A0008270molecular_functionzinc ion binding
A0010008cellular_componentendosome membrane
A0016020cellular_componentmembrane
A0016567biological_processprotein ubiquitination
A0019941biological_processmodification-dependent protein catabolic process
A0022626cellular_componentcytosolic ribosome
A0022627cellular_componentcytosolic small ribosomal subunit
A0030666cellular_componentendocytic vesicle membrane
A0031386molecular_functionprotein tag activity
A0031625molecular_functionubiquitin protein ligase binding
A0031982cellular_componentvesicle
A0032040cellular_componentsmall-subunit processome
A0045202cellular_componentsynapse
A0046872molecular_functionmetal ion binding
A0070062cellular_componentextracellular exosome
A1990904cellular_componentribonucleoprotein complex
Functional Information from PDB Data
site_idAC1
Number of Residues9
DetailsBINDING SITE FOR RESIDUE GOL A 153
ChainResidue
AGLU16
AVAL17
AASP21
AASN25
ALYS29
AGLU94
AASP97
ALYS105
AHOH171

Functional Information from PROSITE/UniProt
site_idPS00299
Number of Residues26
DetailsUBIQUITIN_1 Ubiquitin domain signature. KakIqDkegIPpdqQrLIFaGkqleD
ChainResidueDetails
ALYS27-ASP52
ALYS103-ASP128

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues75
DetailsDomain: {"description":"Ubiquitin-like","evidences":[{"source":"PROSITE-ProRule","id":"PRU00214","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues2
DetailsSite: {"description":"Interacts with activating enzyme"}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues1
DetailsSite: {"description":"Essential for function"}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues1
DetailsModified residue: {"description":"Phosphoserine; by PINK1","evidences":[{"source":"PubMed","id":"24660806","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"24751536","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"24784582","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"25527291","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI5
Number of Residues1
DetailsModified residue: {"description":"(Microbial infection) ADP-ribosylthreonine","evidences":[{"source":"PubMed","id":"32330457","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI6
Number of Residues1
DetailsModified residue: {"description":"ADP-ribosylglycine","evidences":[{"source":"PubMed","id":"28525742","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI7
Number of Residues1
DetailsCross-link: {"description":"Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)","evidences":[{"source":"PubMed","id":"16443603","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI8
Number of Residues2
DetailsCross-link: {"description":"Glycyl lysine isopeptide (Gly-Lys) (interchain with K-? in acceptor proteins)"}
ChainResidueDetails

site_idSWS_FT_FI9
Number of Residues2
DetailsCross-link: {"description":"Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)","evidences":[{"source":"PubMed","id":"16443603","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"16543144","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI10
Number of Residues1
DetailsCross-link: {"description":"Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)","evidences":[{"source":"PubMed","id":"15466860","evidenceCode":"ECO:0000305"}]}
ChainResidueDetails

site_idSWS_FT_FI11
Number of Residues1
DetailsCross-link: {"description":"Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)","evidences":[{"source":"PubMed","id":"16543144","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"25752573","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"25752577","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"34239127","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI12
Number of Residues1
DetailsCross-link: {"description":"Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)","evidences":[{"source":"PubMed","id":"25752577","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI13
Number of Residues1
DetailsCross-link: {"description":"Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)","evidences":[{"source":"PubMed","id":"16543144","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"18719106","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

239492

PDB entries from 2025-07-30

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