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Proteins/UNIPROT:Q6P1J6
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) (By similarity). 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 (By similarity). Hydrolyzes fatty acyl chains of diacylglycerols with preference for the sn-2 position and of triacylglycerols with not positional selectivity (By similarity). May also hydrolyze long chain retinyl esters such as retinyl palmitate (By similarity). May contribute to digestion of dietary phospholipids, glycerolipids and retinoids, facilitating lipid absorption at the brush border (By similarity)..
Function from UniProtKB (Q6P1J6), read 2026-09-23. CC BY 4.0.
Curated compounds routed: 0
58 statements
58 statements · 4 reference databases · Subject: PLB1 · Sources: Hetionet, Human-GEM, Reactome, Rhea
34 reactions
8 names
Resolves to: PLB1
Reaction pageLeft to rightBalance undeterminableEC 3.1.1.4endoplasmic reticulum
Human-GEM MAR00463CC BY 4.0Reference data
water+1,2-diacyl-sn-glycero-3-phosphocholine(1+)1-O-acyl-sn-glycero-3-phosphocholine(1+)+proton+fatty acid
Catalysed by PLA2G10 or PLA2G3 or PLA2G4C or PLA2G4A or PLA2G2D or PLA2G12A or PLA2G5 or PLA2G2F or PLA2G4D or PLB1 or PLA2G4F or PLA2G1B and 6 more alternatives
Reaction pageLeft to rightBalance undeterminableEC 3.1.1.4cytosol
Human-GEM MAR00630CC BY 4.0Reference data
1-O-acyl-sn-glycero-3-phosphocholine(1+)+waterproton+sn-glycerol 3-phosphocholine+fatty acid
Catalysed by LYPLA2 or PNPLA6 or PLA2G15 or PLA2G4A or LYPLA1 or PNPLA7 or PNPLA8 or PLB1 or ASPG or CLCF1
Reaction pageLeft to rightBalance undeterminableEC 3.1.1.5cytosol
Human-GEM MAR00633CC BY 4.0Reference data
water+phosphatidylethanolamineMAM00511c+proton+fatty acid
Catalysed by PLA2G10 or PLA2G3 or PLA2G4C or PLA2G4A or PLA2G2D or PLA2G12A or PLA2G5 or PLA2G2F or PLA2G4D or PLB1 or PLA2G4F or PLA2G1B and 6 more alternatives
Reaction pageLeft to rightBalance undeterminableEC 3.1.1.4cytosol
Human-GEM MAR00643CC BY 4.0Reference data
MAM00511c+waterproton+MAM02913c+fatty acid
Catalysed by LYPLA2 or PNPLA6 or PLA2G15 or PLA2G4A or LYPLA1 or PNPLA7 or PNPLA8 or PLB1 or ASPG or CLCF1
Reaction pageLeft to rightBalance undeterminableEC 3.1.1.5cytosol
Human-GEM MAR00645CC BY 4.0Reference data
water+1,2-diacyl-sn-glycero-3-phosphocholine(1+)1-O-acyl-sn-glycero-3-phosphocholine(1+)+proton+fatty acid
Catalysed by PLA2G10 or PLA2G3 or PLA2G4C or PLA2G4A or PLA2G2D or PLA2G12A or PLA2G5 or PLA2G2F or PLA2G4D or PLB1 or PLA2G4F or PLA2G1B and 6 more alternatives
Reaction pageLeft to rightBalance undeterminableEC 3.1.1.4lysosome
Human-GEM MAR05254CC BY 4.0Reference data
water+1-(alk-1-enyl)-2-acyl-sn-glycero-3-phosphoethanolamine1-(alk-1-enyl)-sn-glycero-3-phosphoethanolamine+proton+fatty acid
Catalysed by PLA2G10 or PLA2G3 or PLA2G4C or PLA2G4A or PLA2G2D or PLA2G12A or PLA2G5 or PLA2G2F or PLA2G4D or PLB1 or PLA2G4F or PLA2G1B and 6 more alternatives
Reaction pageLeft to rightBalance undeterminableEC 3.1.1.4cytosol
Human-GEM MAR07603CC BY 4.0Reference data
a 1-O-alkyl-2-acyl-sn-glycero-3-phosphocholine+waterMAM00549c+proton+fatty acid
Catalysed by PLA2G10 or PLA2G3 or PLA2G4C or PLA2G4A or PLA2G2D or PLA2G12A or PLA2G5 or PLA2G2F or PLA2G4D or PLB1 or PLA2G4F or PLA2G1B and 6 more alternatives
Reaction pageLeft to rightBalance undeterminableEC 3.1.1.4cytosol
Human-GEM MAR07615CC BY 4.0Reference data
a triacylglycerol+watera diacylglycerol+a fatty acid+hydron
Catalysed by DDHD2 or LPL or LIPF or ABHD2 or LIPC or PNLIP or CEL or AADAC or PNPLA4 or PNLIPRP2 or LIPE or PNLIPRP3 and 7 more alternatives
Reaction pageLeft to rightBalance undeterminable
Rhea RHEA:12044CC BY 4.0Reference data
a 1-acyl-sn-glycero-3-phosphocholine+watersn-glycerol 3-phosphocholine+a fatty acid+hydron
Catalysed by PLA2G6 or PLA2G4B or LIPC or PLA2G4A or PLB1 or PNPLA7 or ASPG or PNPLA6 or PLA2G15 or PNPLA8 or PLA2G4C
Reaction pageLeft to rightBalance undeterminable
Rhea RHEA:15177CC BY 4.0Reference data
a 1,2-diacyl-sn-glycero-3-phosphocholine+watera 1-acyl-sn-glycero-3-phosphocholine+a fatty acid+hydron
Catalysed by PLA2G10 or PLA2G6 or PLA2G1B or PLA2G4B or PLA2G2A or PRDX6 or PLA2G5 or PNPLA4 or PLA2G4A or PLAAT3 or PLA2G4E or PLA2G4F and 18 more alternatives
Reaction pageLeft to rightBalance undeterminable
Rhea RHEA:15801CC BY 4.0Reference data
a 1-O-alkyl-2-acyl-sn-glycero-3-phosphocholine+watera 1-O-alkyl-sn-glycero-3-phosphocholine+a fatty acid+hydron
Catalysed by PLA2G6 or PLA2G4A or PLA2G4F or PLB1 or PAFAH2 or PLA2G4C
Reaction pageLeft to rightBalance undeterminable
Rhea RHEA:36231CC BY 4.0Reference data