Target type: molecularfunction
Catalysis of the reaction: a 1,2-diacyl-sn-glycero-3-phospholipid + H2O = 1-acyl-sn-glycero-3-phospholipid + a fatty acid. This reaction removes the fatty acid attached to the sn2-position. Substrates include phosphatidylcholine, phosphatidylethanolamine, choline plasmalogen and phosphatides. [RHEA:15801]
Phospholipase A2 (PLA2) enzymes catalyze the hydrolysis of the sn-2 ester bond of glycerophospholipids, liberating a free fatty acid and a lysophospholipid. This reaction is essential for a wide range of cellular processes, including:
* **Signal transduction:** PLA2s release arachidonic acid, a precursor for the synthesis of eicosanoids, such as prostaglandins, thromboxanes, leukotrienes, and lipoxins, which play crucial roles in inflammation, pain, fever, and blood clotting.
* **Membrane remodeling:** PLA2s contribute to the dynamic turnover of membrane phospholipids, regulating membrane fluidity, permeability, and the trafficking of membrane proteins.
* **Lipid digestion:** Pancreatic PLA2s are involved in the breakdown of dietary phospholipids in the small intestine, facilitating the absorption of fatty acids.
* **Antibacterial defense:** Some PLA2s have antibacterial activity by disrupting bacterial cell membranes.
* **Cell growth and differentiation:** PLA2s are implicated in cell growth, proliferation, and differentiation through the release of signaling molecules and the modulation of membrane properties.
The activity of PLA2s is highly regulated and influenced by factors such as Ca2+ concentration, pH, membrane composition, and the presence of specific inhibitors or activators. Different PLA2 isoforms exhibit distinct substrate preferences, tissue distributions, and regulatory mechanisms, contributing to the diverse roles of this enzyme family in cellular functions.'
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| Protein | Definition | Taxonomy |
|---|---|---|
| Cytosolic phospholipase A2 | A cytosolic phospholipase A2 that is encoded in the genome of cow. [OMA:A4IFJ5, PRO:DNx] | Bos taurus (cattle) |
| Cytosolic phospholipase A2 beta | A cytosolic phospholipase A2 beta that is encoded in the genome of human. [PRO:DNx, UniProtKB:P0C869] | Homo sapiens (human) |
| Group XIIA secretory phospholipase A2 | A group XIIA secretory phospholipase A2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9BZM1] | Homo sapiens (human) |
| Group IID secretory phospholipase A2 | A group IID secretory phospholipase A2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9UNK4] | Homo sapiens (human) |
| Group IIE secretory phospholipase A2 | A group IIE secretory phospholipase A2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9NZK7] | Homo sapiens (human) |
| Group IIF secretory phospholipase A2 | A group IIF secretory phospholipase A2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9BZM2] | Homo sapiens (human) |
| Group XIIB secretory phospholipase A2-like protein | A group XIIB secretory phospholipase A2-like protein that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q9BX93] | Homo sapiens (human) |
| Patatin-like phospholipase domain-containing protein 2 | A patatin-like phospholipase domain-containing protein 2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q96AD5] | Homo sapiens (human) |
| Cytosolic phospholipase A2 | A cytosolic phospholipase A2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P47712] | Homo sapiens (human) |
| Phospholipase A2, membrane associated | A phospholipase A2, membrane associated that is encoded in the genome of human. [PRO:DNx, UniProtKB:P14555] | Homo sapiens (human) |
| Cytosolic phospholipase A2 beta | A cytosolic phospholipase A2 beta that is encoded in the genome of human. [PRO:DNx, UniProtKB:P0C869] | Homo sapiens (human) |
| Phospholipase A2 | A phospholipase A2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P04054] | Homo sapiens (human) |
| 85/88 kDa calcium-independent phospholipase A2 | An 85/88 kDa calcium-independent phospholipase A2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:O60733] | Homo sapiens (human) |
| Group 10 secretory phospholipase A2 | A group 10 secretory phospholipase A2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:O15496] | Homo sapiens (human) |
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| quinacrine | quinacrine : A member of the class of acridines that is acridine substituted by a chloro group at position 6, a methoxy group at position 2 and a [5-(diethylamino)pentan-2-yl]nitrilo group at position 9. Quinacrine: An acridine derivative formerly widely used as an antimalarial but superseded by chloroquine in recent years. It has also been used as an anthelmintic and in the treatment of giardiasis and malignant effusions. It is used in cell biological experiments as an inhibitor of phospholipase A2. | acridines; aromatic ether; organochlorine compound; tertiary amino compound | antimalarial; EC 1.8.1.12 (trypanothione-disulfide reductase) inhibitor |
| nifedipine | Nifedipine: A potent vasodilator agent with calcium antagonistic action. It is a useful anti-anginal agent that also lowers blood pressure. | C-nitro compound; dihydropyridine; methyl ester | calcium channel blocker; human metabolite; tocolytic agent; vasodilator agent |
| ici 204,219 | zafirlukast: a leukotriene D4 receptor antagonist | carbamate ester; indoles; N-sulfonylcarboxamide | anti-asthmatic agent; leukotriene antagonist |
| 4-bromophenacyl bromide | 4-bromophenacyl bromide: phospholipidase A(2) inhibitor; structure | ||
| oleanolic acid | hydroxy monocarboxylic acid; pentacyclic triterpenoid | plant metabolite | |
| ubenimex | ubenimex: growth inhibitor | ||
| 5-benzyloxytryptophan | |||
| fpl 67047xx | FPL 67047XX: inhibits phospholipase A2; structure in first source | ||
| 3-octylthio-1,1,1-trifluoro-2-propanone | 3-octylthio-1,1,1-trifluoro-2-propanone: a pesticide synergist; inhibits juvenile hormone esterase | ||
| varespladib | aromatic ether; benzenes; dicarboxylic acid monoamide; indoles; monocarboxylic acid; primary carboxamide | anti-inflammatory drug; antidote; EC 3.1.1.4 (phospholipase A2) inhibitor | |
| ly 311727 | LY 311727: a potent & selective inhibitor of human non-pancreatic secretory phospholipase A2; structure given in first source | ||
| cholic acid | cholic acid : A bile acid that is 5beta-cholan-24-oic acid bearing three alpha-hydroxy substituents at position 3, 7 and 12. Cholic Acid: A major primary bile acid produced in the liver and usually conjugated with glycine or taurine. It facilitates fat absorption and cholesterol excretion. | 12alpha-hydroxy steroid; 3alpha-hydroxy steroid; 7alpha-hydroxy steroid; bile acid; C24-steroid; trihydroxy-5beta-cholanic acid | human metabolite; mouse metabolite |
| curcumin | curcumin : A beta-diketone that is methane in which two of the hydrogens are substituted by feruloyl groups. A natural dyestuff found in the root of Curcuma longa. Curcumin: A yellow-orange dye obtained from tumeric, the powdered root of CURCUMA longa. It is used in the preparation of curcuma paper and the detection of boron. Curcumin appears to possess a spectrum of pharmacological properties, due primarily to its inhibitory effects on metabolic enzymes. | aromatic ether; beta-diketone; diarylheptanoid; enone; polyphenol | anti-inflammatory agent; antifungal agent; antineoplastic agent; biological pigment; contraceptive drug; dye; EC 1.1.1.205 (IMP dehydrogenase) inhibitor; EC 1.1.1.21 (aldehyde reductase) inhibitor; EC 1.1.1.25 (shikimate dehydrogenase) inhibitor; EC 1.6.5.2 [NAD(P)H dehydrogenase (quinone)] inhibitor; EC 1.8.1.9 (thioredoxin reductase) inhibitor; EC 2.7.10.2 (non-specific protein-tyrosine kinase) inhibitor; EC 3.5.1.98 (histone deacetylase) inhibitor; flavouring agent; food colouring; geroprotector; hepatoprotective agent; immunomodulator; iron chelator; ligand; lipoxygenase inhibitor; metabolite; neuroprotective agent; nutraceutical; radical scavenger |
| quercetin | 7-hydroxyflavonol; pentahydroxyflavone | antibacterial agent; antineoplastic agent; antioxidant; Aurora kinase inhibitor; chelator; EC 1.10.99.2 [ribosyldihydronicotinamide dehydrogenase (quinone)] inhibitor; geroprotector; phytoestrogen; plant metabolite; protein kinase inhibitor; radical scavenger | |
| arachidonyltrifluoromethane | AACOCF3 : A fatty acid derivative that is arachidonic acid in which the OH part of the carboxy group has been replaced by a trifluoromethyl group arachidonyltrifluoromethane: structure given in first source; inhibits 85-kDa phospholipase A2 | fatty acid derivative; ketone; olefinic compound; organofluorine compound | EC 3.1.1.4 (phospholipase A2) inhibitor |
| amentoflavone | biflavonoid; hydroxyflavone; ring assembly | angiogenesis inhibitor; antiviral agent; cathepsin B inhibitor; P450 inhibitor; plant metabolite | |
| 4-amylcinnamoylanthranilic acid | 4-amylcinnamoylanthranilic acid: phospholipase A2 inhibitor N-(p-amylcinnamoyl)anthranilic acid : An amidobenzoic acid that is anthranilic acid in which one of the anilino hydrogens is replaced by a 4-pentylcinnamoyl group. It is a transient receptor potential (TRP) channel blocker and phospholipase A2 (PLA2) inhibitor. | amidobenzoic acid; cinnamamides; secondary carboxamide | EC 3.1.1.4 (phospholipase A2) inhibitor; TRP channel blocker |
| 3-(4-octadecyl)benzoylacrylic acid | |||
| ochnaflavone | ochnaflavone : A biflavonoid with an ether linkage between the B-rings of the apigenin and luteolin subunits. It has been isolated from several members of the Ochnaceae plant family. ochnaflavone: from Lonicera japonica; structure given in first source | aromatic ether; biflavonoid; hydroxyflavone | anti-inflammatory agent; antiatherogenic agent; antibacterial agent; EC 3.1.1.4 (phospholipase A2) inhibitor; leukotriene antagonist; plant metabolite |
| manoalide | manoalide : A sesterterpenoid isolated from the marine sponge Luffariella variabilis and which has been shown to exhibit inhibitory activity towards phospholipase A2. manoalide: phospholipase A2 inhibitor; sesterterpene from marine sponge L. variabilis; structure given in first source | butenolide; lactol; sesterterpenoid | EC 3.1.1.4 (phospholipase A2) inhibitor; EC 5.99.1.2 (DNA topoisomerase) inhibitor; EC 5.99.1.3 [DNA topoisomerase (ATP-hydrolysing)] inhibitor; metabolite |
| manoalogue | manoalogue: synthetic analog of manoalide; phospholipase A2 antagonist; structure given in first source | ||
| ursodoxicoltaurine | tauroursodeoxycholate : An organosulfonate oxoanion that is the conjugate base of tauroursodeoxycholic acid arising from deprotonation of the sulfonate OH group; major species at pH 7.3. tauroursodeoxycholic acid : A bile acid taurine conjugate derived from ursoodeoxycholic acid. | bile acid taurine conjugate | anti-inflammatory agent; apoptosis inhibitor; bone density conservation agent; cardioprotective agent; human metabolite; neuroprotective agent |
| ym 26734 | YM 26734: inhibits group II phospholipase A2; structure given in first source | ||
| efipladib | efipladib: structure in first source | ||
| indoxam | indoxam: structure in first source | ||
| bolinaquinone | bolinaquinone: a marine sesquiterpenoid from sponge Dysidea sp. with anti-inflammatory activity; structure in first source | ||
| cacospongionolide b | cacospongionolide B: isolated from the sponge Fasciospongia cavernosa; structure in first source | ||
| methyl arachidonylfluorophosphonate | phosphonic ester | ||
| pyrrophenone | pyrrophenone: structure in first source | ||
| atglistatin | atglistatin : A biphenyl that is 1,1'-biphenyl substituted by (dimethylcarbamoyl)amino and dimethylamino groups at positions 3 and 4', respectively. It is a potent inhibitor of adipose triglyceride lipase activity (IC50 = 700nM). atglistatin: inhibits adipose triglyceride lipase; structure in first source |