A Cell Wall-Active Lipopeptide from the Fungus <i>Pochonia bulbillosa</i>
作者:Frank E. Koehn、Donald R. Kirsch、Xidong Feng、Jeffrey Janso、Mairead Young
DOI:10.1021/np800341u
日期:2008.12.26
Bioassay-directed fractionation of a fermentation of Pochonia bulbinosa, culture 386272, led to the isolation of a series of structurally novel, prospective cell wall-active lipopeptides. The main component of this suite is 1, a linear hexapeptide with a delta-hydroxymyristic acid amide substituted N-terminus. The structure was deduced using high-field microsample NMR. Fourier transform mass spectrometry, and microscale chemical degradation. The potent cell wall activity and synthetically accessible structure of 1 make it a potential lead for further investigation.
Optical Rotation of Peptides. II. Glycine and Alanine Tripeptides<sup>1</sup>
作者:Erwin Brand、Bernard F. Erlanger、Howard Sachs、Jerome Polatnick
DOI:10.1021/ja01151a513
日期:1951.7
Generation of Enantiomeric Amino Acids during Acid Hydrolysis of Peptides Detected by the Liquid Chromatography/Tandem Mass Spectroscopy
newly generated D‐amino acids are deuterated at the α‐H‐atom. Both innate D‐amino acids and artificially generated ones are identified by the combination of high‐performance liquidchromatography and liquidchromatography/tandem mass spectrometry equipped with a chiral column. When a peptide containing D‐Phe residues was analyzed by this method, the hydrolysis‐induced conversion to L‐Phe was similarly