The stereochemistry of peptides containing alpha-aminoisobutyric acid.
The stereochemistry of peptides containing alpha-aminoisobutyric acid.
复制标题
含有α-氨基异丁酸的肽的立体化学。
DOI：
10.3109/10409238409108718
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发表时间：
1984
期刊：
影响因子：
--
通讯作者：
Etlore Benedetti
中科院分区：
文献类型：
--
作者：
B. Prasad;P. Balaram;Etlore Benedetti
The introduction of alpha-aminoisobutyric acid (Aib) into peptides dramatically limits the range of accessible backbone conformations. The presence of two geminal methyl groups at C alpha sterically compels Aib residues to largely favor structures in the right- or left-handed 3(10)/alpha-helical regions (phi approximately +/- 60 +/- 20 degrees, psi approximately +/- 30 +/- 20 degrees) of the peptide conformational map. Aib residues occur extensively in microbial peptides which form transmembrane channels. This observation has stimulated considerable interest in the stereochemistry of Aib peptides. This review summarizes theoretical studies on the conformations of Aib residues and examines the available data on solid-state structures, derived from single crystal X-ray diffraction studies. Crystal structures of over three dozen Aib-containing peptides, ranging in length from 2 to 11 residues, have been reported so far which exemplify various types of beta-turns, consecutive beta-turns, and helical structures. Examples of nonhydrogen bonded and cyclic structures are also described. The crystallographic results compare well with structural studies in solution, establishing that Aib peptides can provide rigid structural models for the development of spectroscopic methods of peptide conformational analysis.
脑啡肽的新型类似物：鉴定生物活性所需的官能团。
影响因子：
7.3
作者：
Gorin,FA;Balasubramanian,TM;Cicero,TJ;Schwietzer,J;Marshall,GR
通讯作者：
Marshall,GR
DOI：
10.1111/j.1399-3011.1980.tb02949.x
发表时间：
1980
期刊：
International journal of peptide and protein research
影响因子：
--
作者：
Benedetti,E;Pedone,C;Toniolo,C;Némethy,G;Pottle,MS;Scheraga,HA
通讯作者：
Scheraga,HA