Structural analysis of ARC-type inhibitor (ARC-1034) binding to protein kinase A catalytic subunit and rational design of bisubstrate analogue inhibitors of basophilic protein kinases.
The crystal structure of a complex of the catalytic subunit (type alpha) of cAMP-dependent protein kinase (PKA C alpha) with ARC-type inhibitor (ARC-1034), the presumed lead scaffold of previously reported adenosine-oligo-arginine conjugate-based (ARC-type) inhibitors, was solved ...
The crystal structure of a complex of the catalytic subunit (type alpha) of cAMP-dependent protein kinase (PKA C alpha) with ARC-type inhibitor (ARC-1034), the presumed lead scaffold of previously reported adenosine-oligo-arginine conjugate-based (ARC-type) inhibitors, was solved. Structural elements important for interaction with the kinase were established with specifically modified derivatives of the lead compound. On the basis of this knowledge, a new generation of inhibitors, conjugates of adenosine-4'-dehydroxymethyl-4'-carboxylic acid moiety and oligo(D-arginine), was developed with inhibitory constants well into the subnanomolar range. The structural determinants of selectivity of the new compounds were established in assays with ROCK-II and PKBgamma.
Related Citations:
Conjugation of Adenosine and Hexa-(D-arginine)Leads to a Nanomolar Bisubstrate-Analog Inhibitor of Basophilic Protein Kinases Enkvist, E., Lavogina, D., Raidaru, G., Vaasa, A., Viil, I., Lust, M., Viht, K., Uri, A. (2006) J Med Chem 49: 7150
Organizational Affiliation:
Institute of Chemistry, 2 Jakobi Street, 51014 Tartu, Estonia.
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