Side chain homologation of alanyl peptide nucleic acids: pairing selectivity and stacking
作者:Ulf Diederichsen、Daniel Weicherding、Nicola Diezemann
DOI:10.1039/b411545g
日期:——
Alanyl peptide nucleic acids (alanyl-PNAs) are oligomers based on a regular peptide backbone with alternating configuration of the amino acids. All side chains are modified by covalently linked nucleobases. Alanyl-PNAs form very rigid, well defined, and linear double strands based on hydrogen bonding of complementary strands, stacking, and solvation. Side chain homology was examined by comparing a
丙氨酰肽核酸(丙氨酰-PNA)是基于规则的肽主链和氨基酸的交替构型的寡聚体。所有侧链均被共价连接的核碱基修饰。基于互补链的氢键键合,堆积和溶剂化,丙氨酰-PNAs形成非常刚性,定义明确且线性的双链。通过比较亚甲基接头(丙氨酰基-PNA)与乙烯接头(同丙氨酰基-PNA),三亚甲基接头(降冰片基-PNA)和PNA序列(核碱基和主链之间的接头长度混合)来检查侧链同源性。侧链同源性与线性双链拓扑结构相结合,对于选择性地选择配对选择性(配对模式)和碱基对堆积非常有价值。