| Record Information |
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| Version | 5.0 |
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| Status | Expected but not Quantified |
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| Creation Date | 2017-09-09 05:39:25 UTC |
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| Update Date | 2022-11-30 19:26:19 UTC |
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| HMDB ID | HMDB0115741 |
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| Secondary Accession Numbers | None |
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| Metabolite Identification |
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| Common Name | PA(a-21:0/i-20:0) |
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| Description | PA(a-21:0/i-20:0) is a phosphatidic acid. It is a glycerophospholipid in which a phosphate moiety occupies a glycerol substitution site. As is the case with diacylglycerols, phosphatidic acids can have many different combinations of fatty acids of varying lengths and saturation attached at the C-1 and C-2 positions. Fatty acids containing 16, 18 and 20 carbons are the most common. PA(a-21:0/i-20:0), in particular, consists of one chain of anteisoheneicosanoic acid at the C-1 position and one chain of isoeicosanoic acid at the C-2 position. Phosphatidic acids are quite rare but are extremely important as intermediates in the biosynthesis of triacylglycerols and phospholipids. |
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| Structure | [H][C@@](COC(=O)CCCCCCCCCCCCCCCCC(C)CC)(COP(O)(O)=O)OC(=O)CCCCCCCCCCCCCCCCC(C)C InChI=1S/C44H87O8P/c1-5-41(4)35-31-27-23-19-15-11-7-9-12-16-20-24-28-32-36-43(45)50-38-42(39-51-53(47,48)49)52-44(46)37-33-29-25-21-17-13-8-6-10-14-18-22-26-30-34-40(2)3/h40-42H,5-39H2,1-4H3,(H2,47,48,49)/t41?,42-/m1/s1 |
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| Synonyms | | Value | Source |
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| 1-Anteisoheneicosanoyl-2-isoeicosanoyl-sn-glycero-3-phosphate | HMDB | | 1-Anteisoheneicosanoyl-2-isoeicosanoyl-sn-phosphatidic acid | HMDB | | PA(41:0) | HMDB | | Phosphatidic acid(a-21:0/i-20:0) | HMDB | | Phosphatidic acid(41:0) | HMDB | | Phosphatidate(A-21:0/I-20:0) | HMDB | | Phosphatidate(41:0) | HMDB | | [(2R)-3-[(18-Methylicosanoyl)oxy]-2-[(18-methylnonadecanoyl)oxy]propoxy]phosphonate | HMDB | | PA(a-21:0/i-20:0) | SMPDB |
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| Chemical Formula | C44H87O8P |
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| Average Molecular Weight | 775.146 |
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| Monoisotopic Molecular Weight | 774.613856759 |
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| IUPAC Name | [(2R)-3-[(18-methylicosanoyl)oxy]-2-[(18-methylnonadecanoyl)oxy]propoxy]phosphonic acid |
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| Traditional Name | (2R)-3-[(18-methylicosanoyl)oxy]-2-[(18-methylnonadecanoyl)oxy]propoxyphosphonic acid |
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| CAS Registry Number | Not Available |
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| SMILES | [H][C@@](COC(=O)CCCCCCCCCCCCCCCCC(C)CC)(COP(O)(O)=O)OC(=O)CCCCCCCCCCCCCCCCC(C)C |
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| InChI Identifier | InChI=1S/C44H87O8P/c1-5-41(4)35-31-27-23-19-15-11-7-9-12-16-20-24-28-32-36-43(45)50-38-42(39-51-53(47,48)49)52-44(46)37-33-29-25-21-17-13-8-6-10-14-18-22-26-30-34-40(2)3/h40-42H,5-39H2,1-4H3,(H2,47,48,49)/t41?,42-/m1/s1 |
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| InChI Key | ARVNPHSSRYPMMT-FBUHDGFBSA-N |
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| Chemical Taxonomy |
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| Description | Belongs to the class of organic compounds known as 1,2-diacylglycerol-3-phosphates. These are glycerol-3-phosphates in which the glycerol moiety is bonded to two aliphatic chains through ester linkages. |
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| Kingdom | Organic compounds |
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| Super Class | Lipids and lipid-like molecules |
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| Class | Glycerophospholipids |
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| Sub Class | Glycerophosphates |
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| Direct Parent | 1,2-diacylglycerol-3-phosphates |
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| Alternative Parents | |
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| Substituents | - 1,2-diacylglycerol-3-phosphate
- Fatty acid ester
- Monoalkyl phosphate
- Dicarboxylic acid or derivatives
- Fatty acyl
- Alkyl phosphate
- Phosphoric acid ester
- Organic phosphoric acid derivative
- Carboxylic acid ester
- Carboxylic acid derivative
- Hydrocarbon derivative
- Organic oxide
- Organic oxygen compound
- Carbonyl group
- Organooxygen compound
- Aliphatic acyclic compound
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| Molecular Framework | Aliphatic acyclic compounds |
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| External Descriptors | Not Available |
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| Ontology |
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| Physiological effect | Not Available |
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| Disposition | |
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| Process | |
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| Role | Not Available |
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| Physical Properties |
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| State | Solid |
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| Experimental Molecular Properties | | Property | Value | Reference |
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| Melting Point | Not Available | Not Available | | Boiling Point | Not Available | Not Available | | Water Solubility | Not Available | Not Available | | LogP | Not Available | Not Available |
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| Experimental Chromatographic Properties | Not Available |
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| Predicted Molecular Properties | |
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| Predicted Chromatographic Properties | Predicted Collision Cross SectionsPredicted Retention Times Underivatized| Chromatographic Method | Retention Time | Reference |
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| Measured using a Waters Acquity ultraperformance liquid chromatography (UPLC) ethylene-bridged hybrid (BEH) C18 column (100 mm × 2.1 mm; 1.7 μmparticle diameter). Predicted by Afia on May 17, 2022. Predicted by Afia on May 17, 2022. | 9.42 minutes | 32390414 | | Predicted by Siyang on May 30, 2022 | 40.8881 minutes | 33406817 | | Predicted by Siyang using ReTip algorithm on June 8, 2022 | 2.27 minutes | 32390414 | | Fem_Long = Waters ACQUITY UPLC HSS T3 C18 with Water:MeOH and 0.1% Formic Acid | 5657.5 seconds | 40023050 | | Fem_Lipids = Ascentis Express C18 with (60:40 water:ACN):(90:10 IPA:ACN) and 10mM NH4COOH + 0.1% Formic Acid | 830.6 seconds | 40023050 | | Life_Old = Waters ACQUITY UPLC BEH C18 with Water:(20:80 acetone:ACN) and 0.1% Formic Acid | 436.0 seconds | 40023050 | | Life_New = RP Waters ACQUITY UPLC HSS T3 C18 with Water:(30:70 MeOH:ACN) and 0.1% Formic Acid | 308.3 seconds | 40023050 | | RIKEN = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid | 1125.4 seconds | 40023050 | | Eawag_XBridgeC18 = XBridge C18 3.5u 2.1x50 mm with Water:MeOH and 0.1% Formic Acid | 2054.9 seconds | 40023050 | | BfG_NTS_RP1 =Agilent Zorbax Eclipse Plus C18 (2.1 mm x 150 mm, 3.5 um) with Water:ACN and 0.1% Formic Acid | 1832.5 seconds | 40023050 | | HILIC_BDD_2 = Merck SeQuant ZIC-HILIC with ACN(0.1% formic acid):water(16 mM ammonium formate) | 148.2 seconds | 40023050 | | UniToyama_Atlantis = RP Waters Atlantis T3 (2.1 x 150 mm, 5 um) with ACN:Water and 0.1% Formic Acid | 3971.2 seconds | 40023050 | | BDD_C18 = Hypersil Gold 1.9µm C18 with Water:ACN and 0.1% Formic Acid | 1233.1 seconds | 40023050 | | UFZ_Phenomenex = Kinetex Core-Shell C18 2.6 um, 3.0 x 100 mm, Phenomenex with Water:MeOH and 0.1% Formic Acid | 3314.0 seconds | 40023050 | | SNU_RIKEN_POS = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid | 1516.9 seconds | 40023050 | | RPMMFDA = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid | 824.0 seconds | 40023050 | | MTBLS87 = Merck SeQuant ZIC-pHILIC column with ACN:Water and :ammonium carbonate | 829.9 seconds | 40023050 | | KI_GIAR_zic_HILIC_pH2_7 = Merck SeQuant ZIC-HILIC with ACN:Water and 0.1% FA | 901.8 seconds | 40023050 | | Meister zic-pHILIC pH9.3 = Merck SeQuant ZIC-pHILIC column with ACN:Water 5mM NH4Ac pH9.3 and 5mM ammonium acetate in water | 10.0 seconds | 40023050 |
Predicted Kovats Retention IndicesUnderivatizedDerivatized| Derivative Name / Structure | SMILES | Kovats RI Value | Column Type | Reference |
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| PA(a-21:0/i-20:0),1TMS,isomer #1 | CCC(C)CCCCCCCCCCCCCCCCC(=O)OC[C@H](COP(=O)(O)O[Si](C)(C)C)OC(=O)CCCCCCCCCCCCCCCCC(C)C | 5358.5 | Semi standard non polar | 33892256 | | PA(a-21:0/i-20:0),1TMS,isomer #1 | CCC(C)CCCCCCCCCCCCCCCCC(=O)OC[C@H](COP(=O)(O)O[Si](C)(C)C)OC(=O)CCCCCCCCCCCCCCCCC(C)C | 4612.1 | Standard non polar | 33892256 | | PA(a-21:0/i-20:0),1TMS,isomer #1 | CCC(C)CCCCCCCCCCCCCCCCC(=O)OC[C@H](COP(=O)(O)O[Si](C)(C)C)OC(=O)CCCCCCCCCCCCCCCCC(C)C | 6172.2 | Standard polar | 33892256 | | PA(a-21:0/i-20:0),1TBDMS,isomer #1 | CCC(C)CCCCCCCCCCCCCCCCC(=O)OC[C@H](COP(=O)(O)O[Si](C)(C)C(C)(C)C)OC(=O)CCCCCCCCCCCCCCCCC(C)C | 5577.4 | Semi standard non polar | 33892256 | | PA(a-21:0/i-20:0),1TBDMS,isomer #1 | CCC(C)CCCCCCCCCCCCCCCCC(=O)OC[C@H](COP(=O)(O)O[Si](C)(C)C(C)(C)C)OC(=O)CCCCCCCCCCCCCCCCC(C)C | 4731.9 | Standard non polar | 33892256 | | PA(a-21:0/i-20:0),1TBDMS,isomer #1 | CCC(C)CCCCCCCCCCCCCCCCC(=O)OC[C@H](COP(=O)(O)O[Si](C)(C)C(C)(C)C)OC(=O)CCCCCCCCCCCCCCCCC(C)C | 6132.4 | Standard polar | 33892256 |
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| GC-MS Spectra| Spectrum Type | Description | Splash Key | Deposition Date | Source | View |
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| Predicted GC-MS | Predicted GC-MS Spectrum - PA(a-21:0/i-20:0) GC-MS (Non-derivatized) - 70eV, Positive | Not Available | 2021-10-13 | Wishart Lab | View Spectrum |
MS/MS Spectra| Spectrum Type | Description | Splash Key | Deposition Date | Source | View |
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| Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - PA(a-21:0/i-20:0) 10V, Positive-QTOF | splash10-06tb-2179802700-007605a3823c19221b90 | 2019-02-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - PA(a-21:0/i-20:0) 20V, Positive-QTOF | splash10-052b-4296301200-c09effe1f0ba9a7dad10 | 2019-02-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - PA(a-21:0/i-20:0) 40V, Positive-QTOF | splash10-0le9-3396002100-6701a98c837f71e43397 | 2019-02-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - PA(a-21:0/i-20:0) 10V, Negative-QTOF | splash10-004i-3009300200-067076ce425a640d4cd2 | 2019-02-23 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - PA(a-21:0/i-20:0) 20V, Negative-QTOF | splash10-004i-9015000000-9737202fdc8b8ec44a0d | 2019-02-23 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - PA(a-21:0/i-20:0) 40V, Negative-QTOF | splash10-004i-9000000000-1336b66d6c8db572bf5e | 2019-02-23 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - PA(a-21:0/i-20:0) 10V, Positive-QTOF | splash10-0a6r-0000000900-9bdd887dca6037bdc403 | 2021-09-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - PA(a-21:0/i-20:0) 20V, Positive-QTOF | splash10-004i-0000005900-4e3066a659b7b8e910ad | 2021-09-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - PA(a-21:0/i-20:0) 40V, Positive-QTOF | splash10-01ta-0000906200-ea825d4385f29decd29a | 2021-09-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - PA(a-21:0/i-20:0) 10V, Positive-QTOF | splash10-0002-0000000900-59b73e7131dd061f227c | 2021-09-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - PA(a-21:0/i-20:0) 20V, Positive-QTOF | splash10-0002-0000009900-101a6d0d1696f8bd7905 | 2021-09-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - PA(a-21:0/i-20:0) 40V, Positive-QTOF | splash10-0072-0000922400-62c4a862ec2f47a018bc | 2021-09-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - PA(a-21:0/i-20:0) 10V, Negative-QTOF | splash10-00di-0000000900-02dc5b3cf396b5aa7b14 | 2021-09-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - PA(a-21:0/i-20:0) 20V, Negative-QTOF | splash10-03mi-0006900400-b819acdc4cbf3c0af9e9 | 2021-09-22 | Wishart Lab | View Spectrum | | Predicted LC-MS/MS | Predicted LC-MS/MS Spectrum - PA(a-21:0/i-20:0) 40V, Negative-QTOF | splash10-01t9-0009300000-d33628a7aad23bece059 | 2021-09-22 | Wishart Lab | View Spectrum |
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