| IED ID | IndEnz0005000816 |
| Enzyme Type ID | lipase000816 |
| Protein Name |
Phospholipase B1, membrane-associated Phospholipase B Lysophospholipase EC 3.1.1.5 Phospholipase A2 EC 3.1.1.4 Phospholipase AdRab-B Phospholipase B/lipase PLB/LIP Triacylglycerol lipase EC 3.1.1.3 |
| Gene Name | PLB1 |
| Organism | Oryctolagus cuniculus (Rabbit) |
| Taxonomic Lineage | cellular organisms Eukaryota Opisthokonta Metazoa Eumetazoa Bilateria Deuterostomia Chordata Craniata Vertebrata Gnathostomata (jawed vertebrates) Teleostomi Euteleostomi Sarcopterygii Dipnotetrapodomorpha Tetrapoda Amniota Mammalia Theria Eutheria Boreoeutheria Euarchontoglires Glires (Rodents and rabbits) Lagomorpha Leporidae (rabbits and hares) Oryctolagus Oryctolagus cuniculus (Rabbit) |
| Enzyme Sequence | MALWPSVFLLGLLPLLGRGADQIQTSSGKNTLEGQLWPESLKTFPFPCDPKTLAESVPSESVHSLRPSDIKFVAAIGNVETAPDSGADDLEEQDGTEKRPEQACMGVVTVLSDIIGRFSPSALMPLCPETRLVPRGGAEDLWMQATELVRSMRENPQLDFEHDWKLINVFFSNTSQCFPCPSAQQKGLVLGGMDKLTRTLDYLQQEVPKAFVNLVDLSELAAFSRWRQGAQLSPAAEPCRCLRETSQLTKVLTQWSYLEAWDSLLASSKYNTQESFAVVFQPFFYESSLSALLAEPPLQDPTTLALSLWNRMMEPIGRKEEPFSEKERKPLRCPTQESPYLFTYRNSGQLTRVSQPQGKLEVREGTEIRCPDKDPSDSVPTSVHRLKPADIKVIGAMGDSLTAGNGAGSQPGNILDVLTQYRGLSWSVGGDQNISTVTTLANILREFNPSLQGFSVGTGRETTSQAFFNQAVAGARADGLIPQAQRLVALMKNDTRINFQEDWKIITVFIGGNDLCDFCNDPVRYSPQNFTDNIGTALDILHAEIPRAFVNLVKVLEISKLRELYQETKVSCPRMILRSLCPCVLKFDDNSTEIASLIETIKEYQERTQQLIDSGRYDTRDDFTVVLQPFFEKVNMPKTQDGLPDNSFFAPDCFHFSSKAHAHAASALWNNMLEPVGQKTTHNDFEGAVNITCPNQVWPFLSTYKNSVQGFGTWLPCRDRSPSASPPTSVHALRPADIQVVAALGDSLTAGIGIGSKPNDLSDGTTQYRGLSYSSGGDGSLDNVTTLPNILRQFNSNLMGFAVGTGDASGTNAFFNQAVPGAKARDLMSQVQTLVQRMKDDHRVNFQEDWKVITVQIGASDLCDYCTDSNLYSAANFYDHLRDALDALHREVPRALVNLVDFMNPSVTRQVFLGNPDKCPVQQASALCNCVLSPRENSYELARLEALAQAYQSSLRELVESGRYDTREDFSVVLQPFFHSIQLPVLQDGRLDTSFFAPDCVHPNQKFHSQLSRALWRNMLEPLGGKTDALDLTAAITLTCPTQNEPFLRTFRNSDYTYPSRPAVENWGSDFLCTAWNASRGVPNSVHELQPGDIKVVAALGDSLTLAMGARPSNSSDPPMFWRGLSWSIGGDGALETHTTLPNILKKFNPSILGFSTGTLEGTMGLNVAVQGARAQDMPAQARDLVERMRNSPEIDLEKDWKLVTLFVGGNDLCHFCENPEGSSEGEYVQHIQQALDVLYEELPRTFVNVVEVMELAGLHQDQGGRCATLLAAQSHCTCFKYSQSSVEMQELKKVNWNLQSGLSRLSYSHQYVQREDFAVVVQPFFQNTLVPLNGRGDTDLTFFSDDCFHFSERGHAEMAIALWNNMLEPVGHKTTSNNFTYSRTKLKCPSPDSPYLYTLRNSRLLPDQAEADPTVLYWAVPVAAGAGLLIGILAMVAGRGMRCRPREDPPLSLSTGL |
| Enzyme Length | 1458 |
| Uniprot Accession Number | Q05017 |
| Absorption | |
| Active Site | ACT_SITE 400; /evidence=ECO:0000250|UniProtKB:O54728; ACT_SITE 514; /evidence=ECO:0000250|UniProtKB:O54728; ACT_SITE 655; /evidence=ECO:0000250|UniProtKB:O54728 |
| Activity Regulation | |
| Binding Site | |
| Calcium Binding | |
| catalytic Activity | CATALYTIC ACTIVITY: Reaction=a 1,2-diacyl-sn-glycero-3-phosphocholine + H2O = a 1-acyl-sn-glycero-3-phosphocholine + a fatty acid + H(+); Xref=Rhea:RHEA:15801, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:28868, ChEBI:CHEBI:57643, ChEBI:CHEBI:58168; EC=3.1.1.4; Evidence={ECO:0000269|PubMed:8509424};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:15802; Evidence={ECO:0000305|PubMed:8509424}; CATALYTIC ACTIVITY: Reaction=a 1-acyl-sn-glycero-3-phosphocholine + H2O = a fatty acid + H(+) + sn-glycerol 3-phosphocholine; Xref=Rhea:RHEA:15177, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:16870, ChEBI:CHEBI:28868, ChEBI:CHEBI:58168; EC=3.1.1.5; Evidence={ECO:0000250|UniProtKB:O54728};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:15178; Evidence={ECO:0000250|UniProtKB:O54728}; CATALYTIC ACTIVITY: Reaction=a triacylglycerol + H2O = a diacylglycerol + a fatty acid + H(+); Xref=Rhea:RHEA:12044, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:17855, ChEBI:CHEBI:18035, ChEBI:CHEBI:28868; EC=3.1.1.3; Evidence={ECO:0000250|UniProtKB:O54728};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:12045; Evidence={ECO:0000250|UniProtKB:O54728}; CATALYTIC ACTIVITY: Reaction=1,2-dihexadecanoyl-sn-glycero-3-phosphocholine + H2O = 1-hexadecanoyl-sn-glycero-3-phosphocholine + H(+) + hexadecanoate; Xref=Rhea:RHEA:41223, ChEBI:CHEBI:7896, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:72998, ChEBI:CHEBI:72999; Evidence={ECO:0000250|UniProtKB:O54728};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:41224; Evidence={ECO:0000250|UniProtKB:O54728}; CATALYTIC ACTIVITY: Reaction=1-hexadecanoyl-2-(9Z-octadecenoyl)-sn-glycero-3-phosphocholine + H2O = (9Z)-octadecenoate + 1-hexadecanoyl-sn-glycero-3-phosphocholine + H(+); Xref=Rhea:RHEA:38779, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:30823, ChEBI:CHEBI:72998, ChEBI:CHEBI:73001; Evidence={ECO:0000250|UniProtKB:O54728};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:38780; Evidence={ECO:0000250|UniProtKB:O54728}; CATALYTIC ACTIVITY: Reaction=1,2-di-(9Z-octadecenoyl)-sn-glycero-3-phosphocholine + H2O = (9Z)-octadecenoate + 1-(9Z-octadecenoyl)-sn-glycero-3-phosphocholine + H(+); Xref=Rhea:RHEA:40923, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:28610, ChEBI:CHEBI:30823, ChEBI:CHEBI:74669; Evidence={ECO:0000250|UniProtKB:O54728};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:40924; Evidence={ECO:0000250|UniProtKB:O54728}; CATALYTIC ACTIVITY: Reaction=1-hexadecanoyl-2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phosphocholine + H2O = (9Z,12Z)-octadecadienoate + 1-hexadecanoyl-sn-glycero-3-phosphocholine + H(+); Xref=Rhea:RHEA:40811, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:30245, ChEBI:CHEBI:72998, ChEBI:CHEBI:73002; Evidence={ECO:0000269|PubMed:8509424};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:40812; Evidence={ECO:0000305|PubMed:8509424}; CATALYTIC ACTIVITY: Reaction=1-hexadecanoyl-2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phosphocholine + H2O = 2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phosphocholine + H(+) + hexadecanoate; Xref=Rhea:RHEA:40971, ChEBI:CHEBI:7896, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:73002, ChEBI:CHEBI:76084; Evidence={ECO:0000269|PubMed:8509424};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:40972; Evidence={ECO:0000305|PubMed:8509424}; CATALYTIC ACTIVITY: Reaction=1-hexadecanoyl-2-(9Z-octadecenoyl)-sn-glycero-3-phosphoethanolamine + H2O = (9Z)-octadecenoate + 1-hexadecanoyl-sn-glycero-3-phosphoethanolamine + H(+); Xref=Rhea:RHEA:40911, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:30823, ChEBI:CHEBI:73004, ChEBI:CHEBI:73007; Evidence={ECO:0000250|UniProtKB:O54728};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:40912; Evidence={ECO:0000250|UniProtKB:O54728}; CATALYTIC ACTIVITY: Reaction=1-hexadecanoyl-2-(9Z-octadecenoyl)-sn-glycero-3-phospho-(1'-sn-glycerol) + H2O = (9Z)-octadecenoate + 1-hexadecanoyl-sn-glycero-3-phospho-(1'-sn-glycerol) + H(+); Xref=Rhea:RHEA:40919, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:30823, ChEBI:CHEBI:72841, ChEBI:CHEBI:75158; Evidence={ECO:0000250|UniProtKB:O54728};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:40920; Evidence={ECO:0000250|UniProtKB:O54728}; CATALYTIC ACTIVITY: Reaction=1,2-dihexadecanoyl-sn-glycero-3-phosphocholine + 2 H2O = 2 H(+) + 2 hexadecanoate + sn-glycerol 3-phosphocholine; Xref=Rhea:RHEA:40975, ChEBI:CHEBI:7896, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:16870, ChEBI:CHEBI:72999; Evidence={ECO:0000269|PubMed:8509424};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:40976; Evidence={ECO:0000305|PubMed:8509424}; CATALYTIC ACTIVITY: Reaction=1-O-hexadecyl-2-(9Z)-octadecenoyl-sn-glycero-3-phosphocholine + H2O = (9Z)-octadecenoate + 1-O-hexadecyl-sn-glycero-3-phosphocholine + H(+); Xref=Rhea:RHEA:40915, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:30823, ChEBI:CHEBI:34112, ChEBI:CHEBI:64496; Evidence={ECO:0000250|UniProtKB:O54728};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:40916; Evidence={ECO:0000250|UniProtKB:O54728}; CATALYTIC ACTIVITY: Reaction=1-hexadecanoyl-sn-glycero-3-phosphocholine + H2O = H(+) + hexadecanoate + sn-glycerol 3-phosphocholine; Xref=Rhea:RHEA:40435, ChEBI:CHEBI:7896, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:16870, ChEBI:CHEBI:72998; Evidence={ECO:0000250|UniProtKB:O54728};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:40436; Evidence={ECO:0000250|UniProtKB:O54728}; CATALYTIC ACTIVITY: Reaction=1,2,3-tri-(9Z-octadecenoyl)-glycerol + H2O = (9Z)-octadecenoate + di-(9Z)-octadecenoylglycerol + H(+); Xref=Rhea:RHEA:38575, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:30823, ChEBI:CHEBI:53753, ChEBI:CHEBI:75945; Evidence={ECO:0000250|UniProtKB:O54728};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:38576; Evidence={ECO:0000250|UniProtKB:O54728}; CATALYTIC ACTIVITY: Reaction=1-hexadecanoyl-2-(9Z)-octadecenoyl-3-octadecanoyl-sn-glycerol + H2O = 1-hexadecanoyl-2-(9Z-octadecenoyl)-sn-glycerol + H(+) + octadecanoate; Xref=Rhea:RHEA:41111, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:25629, ChEBI:CHEBI:75466, ChEBI:CHEBI:77623; Evidence={ECO:0000250|UniProtKB:O54728};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:41112; Evidence={ECO:0000250|UniProtKB:O54728}; CATALYTIC ACTIVITY: Reaction=1,3-dihexadecanoyl-2-(9Z-octadecenoyl)glycerol + H2O = (9Z)-octadecenoate + 1,3-dihexadecanoylglycerol + H(+); Xref=Rhea:RHEA:40983, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:30823, ChEBI:CHEBI:75688, ChEBI:CHEBI:77619; Evidence={ECO:0000250|UniProtKB:O54728};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:40984; Evidence={ECO:0000250|UniProtKB:O54728}; CATALYTIC ACTIVITY: Reaction=1,3-dihexadecanoyl-2-(9Z-octadecenoyl)glycerol + H2O = 1-hexadecanoyl-2-(9Z-octadecenoyl)glycerol + H(+) + hexadecanoate; Xref=Rhea:RHEA:40979, ChEBI:CHEBI:7896, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:75585, ChEBI:CHEBI:75688; Evidence={ECO:0000250|UniProtKB:O54728};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:40980; Evidence={ECO:0000250|UniProtKB:O54728}; CATALYTIC ACTIVITY: Reaction=1-hexadecanoyl-2-(9Z)-octadecenoyl-3-octadecanoyl-sn-glycerol + H2O = (9Z)-octadecenoate + 1-hexadecanoyl-3-octadecanoyl-sn-glycerol + H(+); Xref=Rhea:RHEA:41103, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:30823, ChEBI:CHEBI:77623, ChEBI:CHEBI:77624; Evidence={ECO:0000250|UniProtKB:O54728};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:41104; Evidence={ECO:0000250|UniProtKB:O54728}; CATALYTIC ACTIVITY: Reaction=1-hexadecanoyl-2-(9Z)-octadecenoyl-3-octadecanoyl-sn-glycerol + H2O = 2-(9Z-octadecenoyl)-3-octadecanoyl-sn-glycerol + H(+) + hexadecanoate; Xref=Rhea:RHEA:41107, ChEBI:CHEBI:7896, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:75558, ChEBI:CHEBI:77623; Evidence={ECO:0000250|UniProtKB:O54728};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:41108; Evidence={ECO:0000250|UniProtKB:O54728}; CATALYTIC ACTIVITY: Reaction=1-octadecanoyl-2-(9Z,12Z)-octadecadienoyl-sn-glycerol + H2O = (9Z,12Z)-octadecadienoate + 1-octadecanoyl-sn-glycerol + H(+); Xref=Rhea:RHEA:40927, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:30245, ChEBI:CHEBI:75550, ChEBI:CHEBI:77097; Evidence={ECO:0000250|UniProtKB:O54728};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:40928; Evidence={ECO:0000250|UniProtKB:O54728}; CATALYTIC ACTIVITY: Reaction=1,2-di-(9Z-octadecenoyl)-glycerol + H2O = (9Z)-octadecenoate + 1-(9Z-octadecenoyl)-glycerol + H(+); Xref=Rhea:RHEA:40967, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:30823, ChEBI:CHEBI:52323, ChEBI:CHEBI:75342; Evidence={ECO:0000269|PubMed:8509424};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:40968; Evidence={ECO:0000305|PubMed:8509424}; CATALYTIC ACTIVITY: Reaction=2,3-di-(9Z)-octadecenoyl-sn-glycerol + H2O = (9Z)-octadecenoate + 3-(9Z-octadecenoyl)-sn-glycerol + H(+); Xref=Rhea:RHEA:42604, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:30823, ChEBI:CHEBI:75824, ChEBI:CHEBI:75938; Evidence={ECO:0000250|UniProtKB:O54728};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:42605; Evidence={ECO:0000250|UniProtKB:O54728}; CATALYTIC ACTIVITY: Reaction=1,3-di-(9Z-octadecenoyl)-glycerol + H2O = (9Z)-octadecenoate + (9Z-octadecenoyl)-glycerol + H(+); Xref=Rhea:RHEA:39939, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:30823, ChEBI:CHEBI:75735, ChEBI:CHEBI:75937; Evidence={ECO:0000269|PubMed:8509424};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:39940; Evidence={ECO:0000305|PubMed:8509424}; CATALYTIC ACTIVITY: Reaction=1-(9Z-octadecenoyl)-glycerol + H2O = (9Z)-octadecenoate + glycerol + H(+); Xref=Rhea:RHEA:38487, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:17754, ChEBI:CHEBI:30823, ChEBI:CHEBI:75342; Evidence={ECO:0000269|PubMed:8509424};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:38488; Evidence={ECO:0000305|PubMed:8509424}; CATALYTIC ACTIVITY: Reaction=2-(9Z-octadecenoyl)-glycerol + H2O = (9Z)-octadecenoate + glycerol + H(+); Xref=Rhea:RHEA:38491, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:17754, ChEBI:CHEBI:30823, ChEBI:CHEBI:73990; Evidence={ECO:0000269|PubMed:8509424};PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:38492; Evidence={ECO:0000305|PubMed:8509424}; |
| DNA Binding | |
| EC Number | 3.1.1.5; 3.1.1.4; 3.1.1.3 |
| Enzyme Function | FUNCTION: Calcium-independent membrane-associated phospholipase that catalyzes complete diacylation of phospholipids by hydrolyzing both sn-1 and sn-2 fatty acyl chains attached to the glycerol backbone (phospholipase B activity) (PubMed:8509424). Has dual phospholipase and lysophospholipase activities toward diacylphospholipids. Preferentially cleaves sn-2 ester bonds over sn-1 bonds. Acts as a lipase toward glycerolipid substrates (PubMed:8509424). Hydrolyzes fatty acyl chains of diacylglycerols with preference for the sn-2 position and of triacylglycerols with not positional selectivity (PubMed:8509424). May also hydrolyze long chain retinyl esters such as retinyl palmitate (Probable). May contribute to digestion of dietary phospholipids, glycerolipids and retinoids, facilitating lipid absorption at the brush border (Probable). {ECO:0000269|PubMed:8509424, ECO:0000305|PubMed:8509424}. |
| Temperature Dependency | |
| PH Dependency | |
| Pathway | |
| nucleotide Binding | |
| Features | Active site (3); Chain (1); Glycosylation (10); Region (2); Repeat (4); Signal peptide (1); Topological domain (2); Transmembrane (1) |
| Keywords | Cell membrane;Glycoprotein;Hydrolase;Lipid metabolism;Membrane;Phospholipid metabolism;Reference proteome;Repeat;Signal;Transmembrane;Transmembrane helix |
| Interact With | |
| Induction | |
| Subcellular Location | SUBCELLULAR LOCATION: Apical cell membrane {ECO:0000250|UniProtKB:O54728}; Single-pass type I membrane protein {ECO:0000255}. Note=Present in the intestinal brush border membranes. {ECO:0000250|UniProtKB:O54728}. |
| Modified Residue | |
| Post Translational Modification | PTM: Undergoes proteolytic cleavage in the ileum. {ECO:0000250|UniProtKB:O54728}. |
| Signal Peptide | SIGNAL 1..19; /evidence=ECO:0000255 |
| Structure 3D | |
| Cross Reference PDB | - |
| Mapped Pubmed ID | - |
| Motif | |
| Gene Encoded By | |
| Mass | 161,344 |
| Kinetics | |
| Metal Binding | |
| Rhea ID | RHEA:15801; RHEA:15802; RHEA:15177; RHEA:15178; RHEA:12044; RHEA:12045; RHEA:41223; RHEA:41224; RHEA:38779; RHEA:38780; RHEA:40923; RHEA:40924; RHEA:40811; RHEA:40812; RHEA:40971; RHEA:40972; RHEA:40911; RHEA:40912; RHEA:40919; RHEA:40920; RHEA:40975; RHEA:40976; RHEA:40915; RHEA:40916; RHEA:40435; RHEA:40436; RHEA:38575; RHEA:38576; RHEA:41111; RHEA:41112; RHEA:40983; RHEA:40984; RHEA:40979; RHEA:40980; RHEA:41103; RHEA:41104; RHEA:41107; RHEA:41108; RHEA:40927; RHEA:40928; RHEA:40967; RHEA:40968; RHEA:42604; RHEA:42605; RHEA:39939; RHEA:39940; RHEA:38487; RHEA:38488; RHEA:38491; RHEA:38492 |
| Cross Reference Brenda |