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Overview

Uniprot IDQ15166
Protein NameSerum paraoxonase/lactonase 3
Gene NamePON3
OrganismHomo sapiens

Kla Sites from experimental identification

Position Flanking peptide
159 LVYLKTIKHELLKSV
313 IQNVLSEKPRVSTVY

Function

Has low activity towards the organophosphate paraxon and aromatic carboxylic acid esters. Rapidly hydrolyzes lactones such as statin prodrugs (e.g. lovastatin). Hydrolyzes aromatic lactones and 5- or 6-member ring lactones with aliphatic substituents but not simple lactones or those with polar substituents

Protein Sequence

10 MGKLVALVLL 20 GVGLSLVGEM 30 FLAFRERVNA 40 SREVEPVEPE 50 NCHLIEELES 60 GSEDIDILPS 70 GLAFISSGLK 80 YPGMPNFAPD 90 EPGKIFLMDL 100 NEQNPRAQAL 110 EISGGFDKEL 120 FNPHGISIFI 130 DKDNTVYLYV 140 VNHPHMKSTV 150 EIFKFEEQQR 160 SLVYLKTIKH 170 ELLKSVNDIV 180 VLGPEQFYAT 190 RDHYFTNSLL 200 SFFEMILDLR 210 WTYVLFYSPR 220 EVKVVAKGFC 230 SANGITVSAD 240 QKYVYVADVA 250 AKNIHIMEKH 260 DNWDLTQLKV 270 IQLGTLVDNL 280 TVDPATGDIL 290 AGCHPNPMKL 300 LNYNPEDPPG 310 SEVLRIQNVL 320 SEKPRVSTVY 330 ANNGSVLQGT 340 SVASVYHGKI 350 LIGTVFHKTL YCEL

Gene Ontology

Classification GO ID Description
Cellular Component GO:0005789 endoplasmic reticulum membrane
Cellular Component GO:0070062 extracellular exosome
Cellular Component GO:0005576 extracellular region
Cellular Component GO:0005615 extracellular space
Molecular Function GO:0102007 acyl-L-homoserine-lactone lactonohydrolase activity
Molecular Function GO:0004063 aryldialkylphosphatase activity
Molecular Function GO:0004064 arylesterase activity
Molecular Function GO:0046872 metal ion binding
Molecular Function GO:0042803 protein homodimerization activity
Biological Process GO:0046395 carboxylic acid catabolic process
Biological Process GO:1901335 lactone catabolic process
Biological Process GO:0032929 negative regulation of superoxide anion generation
Biological Process GO:2001038 regulation of cellular response to drug
Biological Process GO:0009636 response to toxic substance

Reference

[1] Yang Z, Yan C, Ma J, Peng P, Ren X et al.. Lactylome analysis suggests lactylation-dependent mechanisms of metabolic adaptation in hepatocellular carcinoma.. Nat Metab 5(1):61-79. 2023 Jan. PMID: 36593272.