title: Structural analysis of new syringopeptins by tandem mass spectrometry.
abstract: New syringopeptins SP(SC)-1 and -2 were isolated from culture filtrates of phytopathogenic bacterium strain SC1 of Pseudomonas syringae pv. syringae. These syringopeptins were composed of a beta-hydroxy fatty acid, a long sequence of aliphatic amino acids. and a lactone moiety of eight amino acids. The amino acid sequences were deduced from a comparison of their tandem mass sepctra with those of known syringopeptins SP-22a and SP-25a. SP(SC)-1 and SP(SC)-2 resembled SP-22a, but differed from the latter by 3 amino acids.
authors.affiliation: Graduate School of Biological Sciences, Nara Institute of Science and Technology, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Isogai
authors.forename: H
authors.initials: H
authors.lastname: Iguchi
authors.forename: J
authors.initials: J
authors.lastname: Nakayama
authors.forename: A
authors.initials: A
authors.lastname: Kusai
authors.forename: J Y
authors.initials: JY
authors.lastname: Takemoto
authors.forename: A
authors.initials: A
authors.lastname: Suzuki
mesh_terms: D000595:Amino Acid Sequence; D003470:Culture Media; D013058:Mass Spectrometry; D008969:Molecular Sequence Data; D010456:Peptides, Cyclic / Q000096:biosynthesis / Q000737:chemistry*; D011549:Pseudomonas / Q000737:chemistry / Q000378:metabolism*
chemical_list: D003470:Culture Media; D010456:Peptides, Cyclic; C095647:syringopeptin SP(SC)-1