Weller K, Schütz H, Petri I
Akademie der Wissenschaften der DDR, Zentralinstitut für Mikrobiologie und Experimentelle Therapie. DDR-69 Jena, G.D.R.
Biophys Chem. 1984 Jun;19(4):299-310. doi: 10.1016/0301-4622(84)87013-1.
This paper describes the model used to estimate the parameters of caffeine-poly(riboadenylate) (poly(A)) interactions from corresponding 1H-NMR measurements. The model of insertion and aggregate binding describes the non-cooperative insertion of a molecule C into an interspace between two monomers of a homopolymer in competition with aggregate binding. It contains two binding constants, K1 for insertion and K2 for the interaction of monomeric A units of the polymer with C molecules in bound aggregates, and two cooperativity parameters, Kcc for stacking of C molecules within aggregates and tau which is thought to be due to conformational adaptation of the polymer to those bound aggregates which cover more than one A unit. In contrast to other models, the size of a binding site (within the aggregates) is less than one monomeric unit, with n denoting the maximum number of C molecules per A unit in bound aggregates. The model is developed for general n by means of the method of sequence-generating functions. For n = 2 and n = 3, the correctness of the model treatment was checked by the matrix method. The model is applicable to the binding of aggregates to homopolymers, which are flexible enough to fit their structure to the aggregates.
本文描述了用于从相应的¹H-NMR测量中估计咖啡因-聚（核糖腺苷酸）（聚（A））相互作用参数的模型。插入和聚集体结合模型描述了分子C在与聚集体结合竞争时非协同插入均聚物两个单体之间的间隙中。它包含两个结合常数，K1用于插入，K2用于聚合物单体A单元与结合聚集体中的C分子的相互作用，以及两个协同参数，Kcc用于聚集体内C分子的堆积，tau被认为是由于聚合物对覆盖多个A单元的结合聚集体的构象适应。与其他模型不同，（聚集体内）结合位点的大小小于一个单体单元，n表示结合聚集体中每个A单元的C分子的最大数量。该模型通过序列生成函数方法针对一般的n进行了开发。对于n = 2和n = 3，通过矩阵法检查了模型处理的正确性。该模型适用于聚集体与均聚物的结合，这些均聚物足够灵活以使其结构适应聚集体。
