- Synthesis and biological evaluation of phosphatidylinositol phosphate affinity probes
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The synthesis of the complete family of phosphatidylinositol phosphate analogues (PIPs) from five key core intermediates A-E is described. These core compounds were obtained from myo-inositol orthoformate 1 via regioselective DIBAL-H and trimethylaluminium-mediated cleavages and a resolution-protection process using camphor acetals 10. Coupling of cores A-E with phosphoramidites 34 and 38, derived from the requisite protected lipid side chains, afforded the fully-protected PIPs. Removal of the remaining protecting groups was achieved via hydrogenolysis using palladium black or palladium hydroxide on carbon in the presence of sodium bicarbonate to afford the complete family of dipalmitoyl- and amino-PIP analogues 42, 45, 50, 51, 58, 59, 67, 68, 76, 77, 82, 83, 92, 93, 99 and 100. Investigations using affinity probes incorporating these compounds have identified novel proteins involved in the PI3K intracellular signalling network and have allowed a comprehensive proteomic analysis of phosphoinositide interacting proteins. The Royal Society of Chemistry 2010.
- Conway, Stuart J.,Gardiner, James,Grove, Simon J. A.,Johns, Melloney K.,Lim, Ze-Yi,Painter, Gavin F.,Robinson, Diane E. J. E.,Schieber, Christine,Thuring, Jan W.,Wong, Leon S.-M.,Yin, Meng-Xin,Burgess, Antony W.,Catimel, Bruno,Hawkins, Phillip T.,Ktistakis, Nicholas T.,Stephens, Leonard R.,Holmes, Andrew B.
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scheme or table
p. 66 - 76
(2010/04/29)
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- A versatile approach to PI(3,4)P2, PI(4,5)P2, and PI(3,4,5)P3 from L-(-)-Quebrachitol
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(matrix presented) PI(3,4)P2 R1 = R2 = PO3H2, R3 = H ; L-(-)-quebrachitol PI(4,5)P2 R1 = H, R2 = R3 = PO3H2 ; PI(3,4,5)Psu
- Qiao, Lixin,Hu, Youhong,Nan, Fajun,Powis, Garth,Kozikowski, Alan P.
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p. 115 - 117
(2007/10/03)
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- General synthesis of 3-phosphorylated mj'o-inositol phospholipids and derivatives
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The D-3-phosphorylated wyo-inositol phospholipids PtdIns(3)P, PtdIns(3,4)P2, PtdIns(3,4,5)P3 and PtdIns(3,5)P2 were synthesised from /yo-inositol orthoformate 8. Key transformations included the regioselective DIBAL- and trimethylaluminium-mediated cleavages of wiyo-inositol orthoformate intermediates and a resolution-protection protocol using the camphor acetals 17. The final reductive debenzylation was effected with Pearlman's catalyst [Pd(OH)J in the presence of sodium hydrogen carbonate. The biological properties of the phospholipids were evaluated against various protein kinases (PKB and PDK-1) in which they played an important activation role.
- Painter, Gavin F.,Grove, Simon J. A.,Gilbert, Lan H.,Holmes, Andrew B.,Raithby, Paul R.,Hill, Malcolm L.,Hawking, Phillip T.,Stephens, Leonard R.
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p. 923 - 935
(2007/10/03)
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- Synthesis of dipalmitoyl phosphatidylinositol 3,4-bis(phosphate) and 3,4,5-tris(phosphate) and their enantiomers
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The dipalmitoyl derivatives 4 and 5 of 3-phosphorylated myo-inositol phospholipids 2 and 3 and their enantiomers are synthesised from homochiral myo-inositol precursors 6 and 11; they serve as biological probes for cell signal transduction.
- Grove, Simon J. A.,Holmes, Andrew B.,Painter, Gavin F.,Hawkins, Phillip T.,Stephens, Leonard R.
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p. 1635 - 1636
(2007/10/03)
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