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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Ligand and loop variations at type 1 copper sites:influence on structure and reactivity
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Ligand and loop variations at type 1 copper sites:influence on structure and reactivity

机译:1型铜位点的配体和环的变化:对结构和反应性的影响

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Type 1 (T1) copper sites promote biological electron transfer and are found in the cupredoxins and a number of copper-containing enzymes including the multi-copper ox-idases.A Tl copper site usually has a distorted tetrahedral geometry with strong ligands provided by the thiolate sulfur of a Cys and the imidazole nitrogens of two His residues.The active site structure is typically completed by a weak axial Met ligand (a second weak axial interaction is found in azurin resulting in a trigonal bipyramidal geometry).The axial Met is not conserved and Gln,Phe,Leu and Val are also found in this position.Three of the four ligands at a T1 copper site are situated on a single C-terminal loop whose length and structure varies.Studies are discussed which investigate both the influence of physiologically relevant axial ligand alterations,and also of mutations to the length and structure of the ligand-containing loop,on the properties of T1 copper sites.
机译:1型(T1)铜位点促进生物电子转移,存在于铜氧还蛋白和许多含铜的酶中,包括多铜氧化酶.T1铜位点通常具有扭曲的四面体几何形状,并且由Cys的硫醇盐硫和两个His残基的咪唑氮,活性位点结构通常由弱的轴向Met配体完成(在天青蛋白中发现第二弱的轴向相互作用,导致三角双锥体几何结构)。在一个位置上也发现了Gln,Phe,Leu和Val.T1铜位点的四个配体中的三个位于一个C末端环上,其长度和结构各不相同。生理相关的轴向配体变化,以及含T1铜位点性质的含配体环的长度和结构突变。

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