1qxl
From Proteopedia
(New page: 200px<br /><applet load="1qxl" size="450" color="white" frame="true" align="right" spinBox="true" caption="1qxl, resolution 2.25Å" /> '''Crystal structure of...) |
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| - | [[Image:1qxl.jpg|left|200px]]<br /><applet load="1qxl" size=" | + | [[Image:1qxl.jpg|left|200px]]<br /><applet load="1qxl" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1qxl, resolution 2.25Å" /> | caption="1qxl, resolution 2.25Å" /> | ||
'''Crystal structure of Adenosine deaminase complexed with FR235380'''<br /> | '''Crystal structure of Adenosine deaminase complexed with FR235380'''<br /> | ||
==Overview== | ==Overview== | ||
| - | We disclose herein optimization efforts around the novel, highly potent | + | We disclose herein optimization efforts around the novel, highly potent non-nucleoside adenosine deaminase (ADA) inhibitor, 1-[(R)-1-hydroxy-4-(6-(3-(1-methylbenzimidazol-2-yl)propionylamino)indol-1 -yl)-2-butyl]imidazole-4-carboxamide 1 (K(i)= 7.7 nM), which we recently reported. Structure-based drug design (SBDD) utilizing the crystal structure of the 1/ADA complex was performed in order to obtain structure-activity relationships (SAR) for this type of compound rationally and effectively. To utilize the newly formed hydrophobic space (F2), replacement of the benzimidazole ring of 1 with a n-propyl chain (4b) or a simple phenyl ring (4c) was tolerated in terms of binding activity, and the length of the methylene-spacer was shown to be optimal at two or three. Replacement of an amide with an ether as a linker was also well tolerated in terms of binding activity and moreover improved the oral absorption (6a and 6b). Finally, transformation of indol-1-yl to indol-3-yl resulted in discovery of a novel highly potent and orally bioavailable ADA inhibitor, 1-[(R)-4-(5-(3-(4-chlorophenyl)propoxy)-1-methylindol-3-yl)-1-hydroxy-2-bu tyl]imidazole-4-carboxamide 8c. |
==About this Structure== | ==About this Structure== | ||
| - | 1QXL is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus] with ZN and FR8 as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Adenosine_deaminase Adenosine deaminase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.5.4.4 3.5.4.4] Full crystallographic information is available from [http:// | + | 1QXL is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus] with <scene name='pdbligand=ZN:'>ZN</scene> and <scene name='pdbligand=FR8:'>FR8</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Active as [http://en.wikipedia.org/wiki/Adenosine_deaminase Adenosine deaminase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.5.4.4 3.5.4.4] Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QXL OCA]. |
==Reference== | ==Reference== | ||
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[[Category: zinc ion]] | [[Category: zinc ion]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 14:44:57 2008'' |
Revision as of 12:45, 21 February 2008
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Crystal structure of Adenosine deaminase complexed with FR235380
Overview
We disclose herein optimization efforts around the novel, highly potent non-nucleoside adenosine deaminase (ADA) inhibitor, 1-[(R)-1-hydroxy-4-(6-(3-(1-methylbenzimidazol-2-yl)propionylamino)indol-1 -yl)-2-butyl]imidazole-4-carboxamide 1 (K(i)= 7.7 nM), which we recently reported. Structure-based drug design (SBDD) utilizing the crystal structure of the 1/ADA complex was performed in order to obtain structure-activity relationships (SAR) for this type of compound rationally and effectively. To utilize the newly formed hydrophobic space (F2), replacement of the benzimidazole ring of 1 with a n-propyl chain (4b) or a simple phenyl ring (4c) was tolerated in terms of binding activity, and the length of the methylene-spacer was shown to be optimal at two or three. Replacement of an amide with an ether as a linker was also well tolerated in terms of binding activity and moreover improved the oral absorption (6a and 6b). Finally, transformation of indol-1-yl to indol-3-yl resulted in discovery of a novel highly potent and orally bioavailable ADA inhibitor, 1-[(R)-4-(5-(3-(4-chlorophenyl)propoxy)-1-methylindol-3-yl)-1-hydroxy-2-bu tyl]imidazole-4-carboxamide 8c.
About this Structure
1QXL is a Single protein structure of sequence from Bos taurus with and as ligands. Active as Adenosine deaminase, with EC number 3.5.4.4 Full crystallographic information is available from OCA.
Reference
Structure-based design, synthesis, and structure-activity relationship studies of novel non-nucleoside adenosine deaminase inhibitors., Terasaka T, Kinoshita T, Kuno M, Seki N, Tanaka K, Nakanishi I, J Med Chem. 2004 Jul 15;47(15):3730-43. PMID:15239652
Page seeded by OCA on Thu Feb 21 14:44:57 2008
Categories: Adenosine deaminase | Bos taurus | Single protein | Kinoshita, T. | FR8 | ZN | Beta barrel | Zinc ion
