1qxl

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{{STRUCTURE_1qxl| PDB=1qxl | SCENE= }}
{{STRUCTURE_1qxl| PDB=1qxl | SCENE= }}
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'''Crystal structure of Adenosine deaminase complexed with FR235380'''
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===Crystal structure of Adenosine deaminase complexed with FR235380===
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==Overview==
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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.
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(as it appears on PubMed at http://www.pubmed.gov), where 15239652 is the PubMed ID number.
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{{ABSTRACT_PUBMED_15239652}}
==About this Structure==
==About this Structure==
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[[Category: Beta barrel]]
[[Category: Beta barrel]]
[[Category: Zinc ion]]
[[Category: Zinc ion]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 06:49:25 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Jul 27 20:25:21 2008''

Revision as of 17:25, 27 July 2008

Image:1qxl.png

Template:STRUCTURE 1qxl

Crystal structure of Adenosine deaminase complexed with FR235380

Template:ABSTRACT PUBMED 15239652

About this Structure

1QXL is a Single protein structure of sequence from Bos taurus. 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

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