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This review aims to use the results of an approach combining crystallographic structure analysis with mutational studies as a framework for the various mechanistic proposals advanced in attempts to explain the astonishing acceleration rates displayed by orotidine 5′-monophosphate decarboxylase, the most proficient enzyme known. Special emphasis is placed on the contributions of active site amino acids...
This review aims to use the results of an approach combining crystallographic structure analysis with mutational studies as a framework for the various mechanistic proposals advanced in attempts to explain the astonishing acceleration rates displayed by orotidine 5′-monophosphate decarboxylase, the most proficient enzyme known. Special emphasis is placed on the contributions of active site amino acids...
2F5 is a monoclonal antibody with potent and broadly neutralizing activity against HIV-1. It targets the membrane-proximal external region (MPER) of the gp41 subunit of the envelope glycoprotein and interferes with the process of fusion between viral and host cell membranes. This study presents eight 2F5 F ab ′ crystal structures in complex with various gp41 peptide epitopes. These structures...
Background: The bacterial phosphoenolpyruvate: sugar phosphotransferase system (PTS) is responsible for the binding, transmembrane transport and phosphorylation of numerous sugar substrates. The system is also involved in the regulation of a variety of metabolic and transcriptional processes. The PTS consists of two non-specific energy coupling components, enzyme I and a heat stable phosphocarrier...
Background: D-Lactate dehydrogenases (D-LDHs) and L-lactate dehydrogenases (L-LDHs) catalyze a reaction differing only in the chirality of the product. Both enzymes utilize the same kind of amino acid side chains in substrate binding and catalysis. Models based on D-LDH-related enzymes propose that these side chains assume identical roles in both enzymes with their active sites related by a simple...
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