1veb

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{{STRUCTURE_1veb| PDB=1veb | SCENE= }}
{{STRUCTURE_1veb| PDB=1veb | SCENE= }}
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'''Crystal Structure of Protein Kinase A in Complex with Azepane Derivative 5'''
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===Crystal Structure of Protein Kinase A in Complex with Azepane Derivative 5===
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==Overview==
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Novel azepane derivatives were prepared and evaluated for protein kinase B (PKB-alpha) and protein kinase A (PKA) inhibition. The original (-)-balanol-derived lead structure (4R)-4-(2-fluoro-6-hydroxy-3-methoxy-benzoyl)-benzoic acid (3R)-3-[(pyridine-4-carbonyl)amino]-azepan-4-yl ester (1) (IC(50) (PKB-alpha) = 5 nM) which contains an ester moiety was found to be plasma unstable and therefore unsuitable as a drug. Based upon molecular modeling studies using the crystal structure of the complex between PKA and 1, the five compounds N-[(3R,4R)-4-[4-(2-fluoro-6-hydroxy-3-methoxy-benzoyl)-benzoylamino]-azepa n-3-yl]-isonicotinamide (4), (3R,4R)-N-[4-[4-(2-fluoro-6-hydroxy-3-methoxy-benzoyl)-benzyloxy]-azepan-3 -yl]-isonicotinamide (5), N-[(3R,4S)-4-[4-(2-fluoro-6-hydroxy-3-methoxy-benzoyl)-phenylamino]-methyl ]-azepan-3-yl)-isonicotinamide (6), N-[(3R,4R)-4-[4-(2-fluoro-6-hydroxy-3-methoxy-benzoyl)-benzylamino]-azepan -3-yl]-isonicotinamide (7), and N-[(3R,4S)-4-(4-[trans-2-[4-(2-fluoro-6-hydroxy-3-methoxy-benzoyl)-phenyl] -vinyl]-azepan-3-yl)-isonicotinamide (8) with linkers isosteric to the ester were designed, synthesized, and tested for in vitro inhibitory activity against PKA and PKB-alpha and for plasma stability in mouse plasma.(1) Compound 4 was found to be plasma stable and highly active (IC(50) (PKB-alpha) = 4 nM). Cocrystals with PKA were obtained for 4, 5, and 8 and analyzed for binding interactions and conformational changes in the ligands and protein in order to rationalize the different activities of the molecules.
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{{ABSTRACT_PUBMED_14998327}}
==About this Structure==
==About this Structure==
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[[Category: Kinase-inhibitor-complex]]
[[Category: Kinase-inhibitor-complex]]
[[Category: Serine/threonine-protein kinase]]
[[Category: Serine/threonine-protein kinase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 17:07:09 2008''

Revision as of 14:07, 28 July 2008

Image:1veb.png

Template:STRUCTURE 1veb

Crystal Structure of Protein Kinase A in Complex with Azepane Derivative 5

Template:ABSTRACT PUBMED 14998327

About this Structure

1VEB is a Protein complex structure of sequences from Bos taurus. Full crystallographic information is available from OCA.

Reference

Structure-based optimization of novel azepane derivatives as PKB inhibitors., Breitenlechner CB, Wegge T, Berillon L, Graul K, Marzenell K, Friebe WG, Thomas U, Schumacher R, Huber R, Engh RA, Masjost B, J Med Chem. 2004 Mar 11;47(6):1375-90. PMID:14998327

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