Cooperativity in monomeric enzymes with single ligand-binding sites.

Cooperativity in monomeric enzymes with single ligand-binding sites.
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DOI:
10.1016/j.bioorg.2011.11.001
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发表时间:
2012-08
影响因子:
5.1
通讯作者:
Miller BG
Miller BG
中科院分区:
化学1区
文献类型:
--
作者:
Porter CM;Miller BG

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Cooperativity is widespread in biology. It empowers a variety of regulatory mechanisms and impacts both the kinetic and thermodynamic properties of macromolecular systems. Traditionally, cooperativity is viewed as requiring the participation of multiple, spatially distinct binding sites that communicate via ligand-induced structural rearrangements; however, cooperativity requires neither multiple ligand binding events nor multimeric assemblies. An underappreciated manifestation of cooperativity has been observed in the non-Michaelis-Menten kinetic response of certain monomeric enzymes that possess only a single ligand-binding site. In this review, we present an overview of kinetic cooperativity in monomeric enzymes. We discuss the primary mechanisms postulated to give rise to monomeric cooperativity and highlight modern experimental methods that could offer new insights into the nature of this phenomenon. We conclude with an updated list of single subunit enzymes that are suspected of displaying cooperativity, and a discussion of the biological significance of this unique kinetic response.
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