X-ray Studies on Crystalline Complexes Involving Amino Acids and Peptides. XXVIII. Recurrence of Characteristic Aggregation and Interaction Patterns in the Crystal Structures of DL- and L-Lysine Formate

Stephen Suresh; M. Vijayan

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X-ray Studies on Crystalline Complexes Involving Amino Acids and Peptides. XXVIII. Recurrence of Characteristic Aggregation and Interaction Patterns in the Crystal Structures of DL- and L-Lysine Formate

机译：涉及氨基酸和多肽的晶体复合物的X射线研究。二十八。 DL-和L-赖氨酸的晶体结构中特征聚集和相互作用模式的重复出现

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The crystal structures of L-lysine formate [P21, a = 5.431(1), b = 7.546(1), c = 12.095 (2) A, β = 93.42 (1)°, Z = 2] and DL-lysine formate [P21/c, a =10.205 (2), b =11.152 (2), c = 8.491(1) A, β = 97.51(1)°, Z = 4] have been determined and refined to R = 0.039 and 0.054 for 1060 and 1689 observed reflections, respectively. Both the structures consist of alternating layers of unlike molecules. The aggregation pattern in the lysine layer in the L-lysine complex, with a straight and a zigzag head-to-tail sequence interconnecting the molecules, is almost the same as that observed in L-lysine acetate, L-lysine L-aspartate and L-lysine D-aspartate. In the DL-lysine complex, hydrogen-bonded dimers of lysine are interconnected by head-to-tail sequences, as in DL-lysine hydrochloride. The structures thus demonstrate the relative invariance of certain aggregation and interaction patterns involving lysine. The relative invariance also extends to interactions between the side-chain amino group and the formate ions.

机译：L-赖氨酸甲酸酯的晶体结构[P21，a = 5.431（1），b = 7.546（1），c = 12.095（2）A，β= 93.42（1）°，Z = 2]和DL-赖氨酸甲酸酯已确定[P21 / c，a = 10.205（2），b = 11.152（2），c = 8.491（1）A，β= 97.51（1）°，Z = 4]，并将其细化为R = 0.039和0.054分别观察到1060和1689的反射。两种结构均由不同分子的交替层组成。 L-赖氨酸复合物中赖氨酸层中的聚集模式具有直的和锯齿状的头尾序列将分子互连，几乎与在乙酸L-赖氨酸，L-赖氨酸L-天冬氨酸和L-赖氨酸中观察到的聚集模式相同。 L-赖氨酸D-天门冬氨酸。在DL-赖氨酸络合物中，赖氨酸的氢键结合的二聚体如DL-赖氨酸盐酸盐中那样由头到尾的序列相互连接。因此，这些结构证明了涉及赖氨酸的某些聚集和相互作用模式的相对不变性。相对不变性还扩展到侧链氨基和甲酸酯离子之间的相互作用。

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《Acta Crystallographica, Section B. Structural Science》 |1995年第3期|共6页
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Stephen Suresh; M. Vijayan;
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X-ray Studies on Crystalline Complexes Involving Amino Acids and Peptides. XXVIII. Recurrence of Characteristic Aggregation and Interaction Patterns in the Crystal Structures of DL- and L-Lysine Formate

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