TITLE

“Pseudoalteromonas januaria” SUT 11 as the Source of Rare Lipodepsipeptides

AUTHOR(S)
Kalinovskaya, Nataliya I.; Dmitrenok, Andrey S.; Kuznetsova, Tatyana A.; Frolova, Galina M.; Christen, Richard; Laatsch, Hartmut; Alexeeva, Yulia V.; Ivanova, Elena P.
PUB. DATE
March 2008
SOURCE
Current Microbiology;Mar2008, Vol. 56 Issue 3, p199
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The marine bacterium “Pseudoalteromonas januaria” SUT 11 isolated from a seawater sample produced the rare cell-bound cyclic lipodepsipeptides A/A′, B/B′, and C/C′. The matrix-assisted laser desorption/ionization mass spectra indicated that one bromine atom presented in the peptides B/B′ and C/C′, whereas the component A/A′ contained no bromine atom. The acyldepsipeptides A/A′–C/C′ have an identical amino acid sequence, Thr-Val-Asn-Asn-Leu/ allo-Ile, but differed in C-terminal amino acid and acyl moieties. Peptides A–C have Leu as a C-terminal amino acid, whereas peptides A′-C′ have allo-Ile. Acyl moieties in peptides A/A′, B/B′, and C/C′ have been found to consist of 11-(4′-hydroxyphenyl)-undeca-2,4,6,8,10-pentaenic acid, 9-(3′-bromo-4′-hydroxyphenyl)-nona-2,4,6,8-tetraenic acid, and 11-(3′-bromo-4′-hydroxyphenyl)-undeca-2,4,6,8,10-pentaenic acid, respectively. The structure of a main pair of peptides B/B′ with molecular masses 843/845 Da has been determined by means of ultraviolet, infrared, and two-dimensional nuclear magnetic resonance spectroscopy. We have demonstrated that tandem nano-electrospray ionization mass spectrometry is a very efficient way for the fast and sensitive investigation of lipopeptides A/A′ and C/C′ with molecular masses 791 and 869/871 Da, respectively, which have been isolated in small amounts.
ACCESSION #
28838559

 

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