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Molecular Modeling Studies of the Conserved B12-Binding Motif and Its Variants from Clostridium tetanomorphum Glutamate Mutase

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Abstract:

The coupling of an aspartate residue with an active site histidine plays a pivotal role in enzyme catalysis. The His-Asp pair in glutamate mutase and other B12-dependent mutases is not only responsible for coenzyme-binding, but is also involved in fine-tuning the enzymatic activities. Our modeling results show that the His-Asp pair is arranged in a highly organized manner. Except for carboxymethylated Cys or Glu, a less hindered or non-charged amino acid residue is preferred between the conserved histidine and aspartate residue.





Keywords: B12; Glutamate mutase; adenosylcobalamin; cobalamin; modeling

Document Type: Research Article

DOI: https://doi.org/10.2174/092986610791190264

Publication date: 2010-06-01

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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