2h55
From Proteopedia
(New page: 200px<br /> <applet load="2h55" size="450" color="white" frame="true" align="right" spinBox="true" caption="2h55, resolution 2.00Å" /> '''Structure of human ...) |
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| - | [[Image:2h55.gif|left|200px]]<br /> | + | [[Image:2h55.gif|left|200px]]<br /><applet load="2h55" size="350" color="white" frame="true" align="right" spinBox="true" |
| - | <applet load="2h55" size=" | + | |
caption="2h55, resolution 2.00Å" /> | caption="2h55, resolution 2.00Å" /> | ||
'''Structure of human Hsp90-alpha bound to the potent water soluble inhibitor PU-DZ8'''<br /> | '''Structure of human Hsp90-alpha bound to the potent water soluble inhibitor PU-DZ8'''<br /> | ||
==Overview== | ==Overview== | ||
| - | Hsp90 chaperones play a critical role in modulating the activity of many | + | Hsp90 chaperones play a critical role in modulating the activity of many cell signaling proteins and are an attractive target for anti-cancer therapeutics. We report here the structures of the water soluble 8-aryl-sulfanyl adenine class Hsp90 inhibitors, 1 (PU-H71) and 2 (PU-H64), in complex with the N-terminal domain of human Hsp90alpha. The conformation of 1 when bound to Hsp90 differs from previously reported 8-aryl adenine Hsp90 inhibitors including 3 (PU24FCl). While the binding mode for 3 places the 2'-halide of the 8-aryl group on top of the adenine ring, for 1 and 2, we show that the 2'-halide is rotated approximately 180 degrees away. This difference explains the opposing trends in Hsp90 inhibitory activity for the 2'-halo derivatives of the 3',4',5'-trimethoxy series where Cl > Br > I compared to the 4',5'-methylenedioxy series where I > Br > Cl. We also present quantum chemical calculations of 2 and its analogues that illuminate their basis for Hsp90 inhibition. The calculated conformation of 2 agreed well with the crystallographically observed conformations of 1 and 2. The predictive nature of the calculations has allowed the exploration of additional derivatives based on the 8-aryl adenine scaffold. |
==About this Structure== | ==About this Structure== | ||
| - | 2H55 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with DZ8 as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http:// | + | 2H55 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] with <scene name='pdbligand=DZ8:'>DZ8</scene> as [http://en.wikipedia.org/wiki/ligand ligand]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2H55 OCA]. |
==Reference== | ==Reference== | ||
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[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
| - | [[Category: Gewirth, D | + | [[Category: Gewirth, D T.]] |
| - | [[Category: Immormino, R | + | [[Category: Immormino, R M.]] |
[[Category: DZ8]] | [[Category: DZ8]] | ||
[[Category: chaperone]] | [[Category: chaperone]] | ||
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[[Category: purine]] | [[Category: purine]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 17:38:18 2008'' |
Revision as of 15:38, 21 February 2008
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Structure of human Hsp90-alpha bound to the potent water soluble inhibitor PU-DZ8
Overview
Hsp90 chaperones play a critical role in modulating the activity of many cell signaling proteins and are an attractive target for anti-cancer therapeutics. We report here the structures of the water soluble 8-aryl-sulfanyl adenine class Hsp90 inhibitors, 1 (PU-H71) and 2 (PU-H64), in complex with the N-terminal domain of human Hsp90alpha. The conformation of 1 when bound to Hsp90 differs from previously reported 8-aryl adenine Hsp90 inhibitors including 3 (PU24FCl). While the binding mode for 3 places the 2'-halide of the 8-aryl group on top of the adenine ring, for 1 and 2, we show that the 2'-halide is rotated approximately 180 degrees away. This difference explains the opposing trends in Hsp90 inhibitory activity for the 2'-halo derivatives of the 3',4',5'-trimethoxy series where Cl > Br > I compared to the 4',5'-methylenedioxy series where I > Br > Cl. We also present quantum chemical calculations of 2 and its analogues that illuminate their basis for Hsp90 inhibition. The calculated conformation of 2 agreed well with the crystallographically observed conformations of 1 and 2. The predictive nature of the calculations has allowed the exploration of additional derivatives based on the 8-aryl adenine scaffold.
About this Structure
2H55 is a Single protein structure of sequence from Homo sapiens with as ligand. Full crystallographic information is available from OCA.
Reference
Structural and quantum chemical studies of 8-aryl-sulfanyl adenine class Hsp90 inhibitors., Immormino RM, Kang Y, Chiosis G, Gewirth DT, J Med Chem. 2006 Aug 10;49(16):4953-60. PMID:16884307
Page seeded by OCA on Thu Feb 21 17:38:18 2008
Categories: Homo sapiens | Single protein | Gewirth, D T. | Immormino, R M. | DZ8 | Chaperone | Dz8 | Grp94 | H64 | H71 | Hsp90 | Pu3 | Purine
