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Protein

Apolipoprotein E

Gene

APOE

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

Functioni

Mediates the binding, internalization, and catabolism of lipoprotein particles. It can serve as a ligand for the LDL (apo B/E) receptor and for the specific apo-E receptor (chylomicron remnant) of hepatic tissues.By similarity

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionHeparin-binding
Biological processLipid transport, Transport

Names & Taxonomyi

Protein namesi
Recommended name:
Apolipoprotein E
Short name:
Apo-E
Gene namesi
Name:APOE
OrganismiBos taurus (Bovine)
Taxonomic identifieri9913 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaLaurasiatheriaCetartiodactylaRuminantiaPecoraBovidaeBovinaeBos
Proteomesi
  • UP000009136 Componenti: Unplaced

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

Chylomicron, HDL, Secreted, VLDL

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Signal peptidei1 – 18By similarityAdd BLAST18
ChainiPRO_000000198419 – 316Apolipoprotein EAdd BLAST298

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Glycosylationi32O-linked (GalNAc...) threonine1 Publication1
Modified residuei142Methionine sulfoxideBy similarity1
Modified residuei146PhosphoserineBy similarity1
Glycosylationi211O-linked (GalNAc...) threonine1 Publication1
Glycosylationi309O-linked (GalNAc...) threonine1 Publication1
Glycosylationi310O-linked (GalNAc...) serine1 Publication1

Post-translational modificationi

Phosphorylated by FAM20C in the extracellular medium.By similarity

Keywords - PTMi

Glycoprotein, Oxidation, Phosphoprotein

Proteomic databases

PaxDbiQ03247.
PeptideAtlasiQ03247.
PRIDEiQ03247.

PTM databases

iPTMnetiQ03247.
UniCarbKBiQ03247.

Expressioni

Tissue specificityi

Secreted in plasma.

Interactioni

GO - Molecular functioni

Protein-protein interaction databases

STRINGi9913.ENSBTAP00000013354.

Structurei

3D structure databases

ProteinModelPortaliQ03247.
SMRiQ03247.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Repeati79 – 1001Add BLAST22
Repeati101 – 1222Add BLAST22
Repeati123 – 1443Add BLAST22
Repeati145 – 1664Add BLAST22
Repeati167 – 1885Add BLAST22
Repeati189 – 2106Add BLAST22
Repeati211 – 2327Add BLAST22
Repeati233 – 2548Add BLAST22

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni79 – 2548 X 22 AA approximate tandem repeatsAdd BLAST176
Regioni157 – 167LDL receptor bindingBy similarityAdd BLAST11
Regioni161 – 164Heparin-bindingBy similarity4
Regioni228 – 235Heparin-bindingBy similarity8

Sequence similaritiesi

Belongs to the apolipoprotein A1/A4/E family.Curated

Keywords - Domaini

Repeat, Signal

Phylogenomic databases

eggNOGiENOG410IVK0. Eukaryota.
ENOG4111MYC. LUCA.
HOGENOMiHOG000034006.
HOVERGENiHBG010582.
InParanoidiQ03247.
KOiK04524.
TreeFamiTF334458.

Family and domain databases

InterProiView protein in InterPro
IPR000074. ApoA_E.
PfamiView protein in Pfam
PF01442. Apolipoprotein. 1 hit.

Sequencei

Sequence statusi: Complete.

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

Q03247-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MKVLWVAVVV ALLAGCQADM EGELGPEEPL TTQQPRGKDS QPWEQALGRF
60 70 80 90 100
WDYLRWVQTL SDQVQEELLN TQVIQELTAL MEETMKEVKA YKEELEGQLG
110 120 130 140 150
PMAQETQARV SKELQAAQAR LGSDMEDLRN RLAQYRSEVQ AMLGQSTEEL
160 170 180 190 200
RARMASHLRK LPKRLLRDAD DLKKRLAVYQ AGASEGAERS LSAIRERFGP
210 220 230 240 250
LVEQGQSRAA TLSTLAGQPL LERAEAWRQK LHGRLEEVGV RAQDRLDKIR
260 270 280 290 300
QQLEEVHAKV EEQGNQMRLQ AEAFQARLRS WFEPLVEDMQ RQWAGLVEKV
310
QLALRPSPTS PPSENH
Length:316
Mass (Da):35,980
Last modified:October 1, 1993 - v1
Checksum:i1231292FC8DA9F1E
GO

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sequence conflicti129 – 130RN → CG in CAA43479 (PubMed:1908018).Curated2
Sequence conflicti162P → R in AAX09070 (PubMed:16305752).Curated1
Sequence conflicti162P → R in AAI02621 (Ref. 4) Curated1

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
X64839 mRNA. Translation: CAA46051.1.
X61171 mRNA. Translation: CAA43479.1.
BT021053 mRNA. Translation: AAX09070.1.
BC102620 mRNA. Translation: AAI02621.1.
PIRiI45996.
S26478.
RefSeqiNP_776416.1. NM_173991.2.
UniGeneiBt.34980.

Genome annotation databases

GeneIDi281004.
KEGGibta:281004.

Similar proteinsi

Entry informationi

Entry nameiAPOE_BOVIN
AccessioniPrimary (citable) accession number: Q03247
Secondary accession number(s): Q3T006, Q5E967
Entry historyiIntegrated into UniProtKB/Swiss-Prot: October 1, 1993
Last sequence update: October 1, 1993
Last modified: October 25, 2017
This is version 126 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, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families