Thymine quintets and their higher order assemblies studied by   electrospray ionization mass spectrometry and theoretical calculation

doi:10.1002/jms.1928

CORC > 北京大学 > 化学与分子工程学院

	Thymine quintets and their higher order assemblies studied by electrospray ionization mass spectrometry and theoretical calculation
	Qiu, Bo ; Qin, Zhen ; Liu, Jia ; Luo, Hai
刊名	journal of mass spectrometry
	2011
关键词	nucleobases cluster ions mass spectrometry density functional calculations chirality 5&apos G-QUADRUPLEXES TELOMERIC DNA ALKALI-METAL G-QUARTETS ISOGUANOSINE PENTAMERS NONCOVALENT COMPLEXES GAS-PHASE ION-TRAP GUANINE -GUANOSINE MONOPHOSPHATE DIANION
DOI	10.1002/jms.1928
英文摘要	We previously reported that thymine molecules can specifically form a pentameric magic number cluster named as thymine quintet in the presence of K(+), Rb(+) and Cs(+). Actually, thymine decamer and doubly charged thymine 15-mer metaclusters can be observed along with thymine quintet in the ESI mass spectra of thymine with the addition of K(+), Rb(+) and Cs(+). The product ion spectra of these metaclusters, especially the 15-mer with hetero central ions, indicate that they are higher order assemblies of thymine quintets. The collision-induced dissociation experiments show that the gas-phase stabilities of these metaclusters depend on the size of the central ions, following the order Cs(+) > Rb(+) > K(+), while K(+) leads to the highest dissociation energy of a thymine quintet. The optimized structures of thymine quintet and decamer were provided by density functional theory calculations, which showed that thymine quintet is bowl-shaped and its tilting angle increases with the size of the central ion. Furthermore, the chirality of thymine quintet was defined for the first time and the resulting different diastereoisomers of thymine decamers were also revealed by the calculation study. Copyright (C) 2011 John Wiley & Sons, Ltd.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000291404500009&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Biochemical Research Methods; Chemistry, Analytical; Spectroscopy; SCI(E); EI; PubMed; 13; ARTICLE; 6; 587-594; 46
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/149964]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Qiu, Bo,Qin, Zhen,Liu, Jia,et al. Thymine quintets and their higher order assemblies studied by electrospray ionization mass spectrometry and theoretical calculation[J]. journal of mass spectrometry,2011.
APA	Qiu, Bo,Qin, Zhen,Liu, Jia,&Luo, Hai.(2011).Thymine quintets and their higher order assemblies studied by electrospray ionization mass spectrometry and theoretical calculation.journal of mass spectrometry.
MLA	Qiu, Bo,et al."Thymine quintets and their higher order assemblies studied by electrospray ionization mass spectrometry and theoretical calculation".journal of mass spectrometry (2011).