volume 83, issue 11, P2091-2099 2015
DOI: 10.1002/prot.24927
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Abstract: Interpretation of the experiments showing that the Ras-GAP protein complex maintains activity in guanosine triphosphate (GTP) hydrolysis upon replacement of Glu61 in Ras with its unnatural nitro analog, NGln, is an important issue for understanding details of chemical transformations at the enzyme active site. By using molecular modeling we demonstrate that both glutamine and its nitro analog in the aci-nitro form participate in the reaction of GTP hydrolysis at the stages of proton transfer and formation of i…

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