Chirally directed formation of nanometer-scale proline clusters.
Chirally directed formation of nanometer-scale proline clusters.
复制标题
纳米级脯氨酸簇的手性定向形成。
DOI:
10.1021/ja0622711
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发表时间:
2006
影响因子:
15
通讯作者:
Clemmer,DavidE
中科院分区:
文献类型:
--
作者:
Myung,Sunnie;Fioroni,Marco;Julian,RyanR;Koeniger,StormyL;Baik,Mu-Hyun;Clemmer,DavidE
Ion mobility measurements, combined with molecular mechanics simulations, are used to study enantiopure and racemic proline clusters formed by electrospray ionization. Broad distributions of cluster sizes and charge states are observed, ranging from clusters containing only a few proline units to clusters that contain more than 100 proline units (i.e., protonated clusters of the form [xPro +nH]n+withx= 1 to >100 andn= 1−7). As the sizes of clusters increase, there is direct evidence for nanometer scale, chirally induced organization into specific structures. Forn= 4 and 5, enantiopure clusters of ∼50 to 100 prolines assemble into structures that are more elongated than the most compact structure that is observed from the racemic proline clusters. A molecular analogue,cis-4-hydroxy-proline, displays significantly different behavior, indicating that in addition to the rigidity of the side chain ring, intermolecular interactions are important in the formation of chirally directed clusters. This is the first case in which assemblies of chirally selective elongated structures are observed in this size range of amino acid clusters. Relationships between enantiopurity, cluster shape, and overall energetics are discussed.
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影响因子:
29.4
作者:
D. Y. Graham;M. Estes;L. Gentry
通讯作者:
D. Y. Graham;M. Estes;L. Gentry
影响因子:
9.4
作者:
Patricia A. Byers;H. Dupont
通讯作者:
H. Dupont
DOI:
10.1093/infdis/137.3.355
发表时间:
1978
期刊:
The Journal of Infectious Diseases
影响因子:
--
作者:
James Lee;B. Kean
通讯作者:
B. Kean
影响因子:
2.1
作者:
D. Morgan;Philip C. Johnson;A. West;L. Wood;C. Ericsson;H. Dupont
通讯作者:
H. Dupont
影响因子:
29.4
作者:
H. Dupont;P. Sullivan;L. Pickering;G. Haynes;P. B. Ackerman
通讯作者:
P. B. Ackerman