A Practical Synthesis of Gramicidin S and Sugar Amino Acid Containing Analogues
作者:Gijsbert M. Grotenbreg、Martijn Kronemeijer、Mattie S. M. Timmer、Farid El Oualid、Renate M. van Well、Martijn Verdoes、Emile Spalburg、Peter A. V. van Hooft、Albert J. de Neeling、Daan Noort、Jacques H. van Boom、Gijsbert A. van der Marel、Herman S. Overkleeft、Mark Overhand
DOI:10.1021/jo0487449
日期:2004.11.1
practical gram-scale and high-yielding synthesis of the antimicrobial peptide gramicidin S is presented. An Fmoc-based solid-phase peptide synthesis protocol is employed for the generation of the linear decapeptide precursor, which is cyclized in solution to afford the target compound. The versatility of our method is demonstrated by the construction of eight gramicidin S analogues (15a−h) having nonproteinogenic
An Unusual Reverse Turn Structure Adopted by a Furanoid Sugar Amino Acid Incorporated in Gramicidin S
作者:Gijsbert M. Grotenbreg、Mattie S. M. Timmer、Antonio L. Llamas-Saiz、Martijn Verdoes、Gijsbert A. van der Marel、Mark J. van Raaij、Herman S. Overkleeft、Mark Overhand
DOI:10.1021/ja0397254
日期:2004.3.1
A new reverse turn, replacing one of the native type II' beta-turns in the cyclic peptide antibiotic gramicidin S, induced by a furanoid sugar amino acid is revealed. The C3-hydroxyl function plays a pivotal role by acting as a H-bond acceptor, consequently flipping the amide bond between residues i and i + 1, as was established by NMR and X-ray crystallographic analysis.
揭示了一种新的反向转向,取代了环肽抗生素短杆菌肽 S 中的天然 II 型β-转向之一,由呋喃糖氨基酸诱导。C3-羟基官能团通过作为 H 键受体发挥关键作用,因此翻转残基 i 和 i + 1 之间的酰胺键,如 NMR 和 X 射线晶体学分析所证实的那样。