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Toward RNase inhibitors: thermodynamics of 2'-CMP/RNase-A binding in multi-ion buffer. | LitMetric

Toward RNase inhibitors: thermodynamics of 2'-CMP/RNase-A binding in multi-ion buffer.

Biochem Pharmacol

Department of Pharmaceutical Sciences, School of Pharmacy, Temple University, 3307 N. Broad Street, Philadelphia, PA 19140, USA.

Published: June 2002

AI Article Synopsis

Article Abstract

Certain ribonucleases (RNases), such as eosinophil-derived neurotoxin, are associated with pathological conditions (e.g. asthma and inflammatory bowel disease) and can even be overtly cyto(neuro)toxic. It has been proposed that small-molecule inhibitors should have therapeutic utility. We used isothermal titration microcalorimetry to characterize reversible inhibitor cytidine 2'-monophosphate (2'-CMP) binding to RNase-A in a multi-ion buffer at 37 degrees as a representative system. The estimated parameters were: K(d)=13.9 microM; DeltaG degrees =-6.90 kcal/mol; DeltaH degrees =-15.7 kcal/mol; and DeltaS degrees =-0.028 kcal/mol-K ('enthalpy-driven' interaction). These data should assist drug design of small-molecule inhibitors of homologous RNase catalytic domains.

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Source
http://dx.doi.org/10.1016/s0006-2952(02)00977-2DOI Listing

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