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Wyświetlanie 1-3 z 3
Tytuł:
Straight and branched (ω-1)-hydroxylated very long chain fatty acids are components of Bradyrhizobium lipid A
Autorzy:
Choma, Adam
Komaniecka, Iwona
Powiązania:
https://bibliotekanauki.pl/articles/1039947.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
symbiosis
fatty acids
LPS
Bradyrhizobium
lipid A
Opis:
Lipopolysaccharides of seven Bradyrhizobium strains and three whole-cell fatty acid preparations from bacteria isolated from nodules of Sarothamnus scoparius (Common Broom) were studied for the presence of very long chain (ω-1)-hydroxy fatty acids. Several such fatty acids were identified. Among them, straight-chain as well as mono- and dimethyl branched acids with chains in the range from 26 to 34 carbon atoms were found. Pyrrolidides and 4,4-dimethyloxazoline derivatives were used to determine the branching position. Carbons at the (ω-10) and/or (ω-11) positions in alkyl chains were points of attachment of methyl groups. These data complete the structure of bradyrhizobial lipid A with important details. The obtained results can be applied in the chemotaxonomy of Bradyrhizobium.
Źródło:
Acta Biochimica Polonica; 2011, 58, 1; 51-58
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterisation of Mesorhizobium huakuii cyclic β-glucan.
Autorzy:
Choma, Adam
Komaniecka, Iwona
Powiązania:
https://bibliotekanauki.pl/articles/1043423.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
OPG
NMR
cyclic β-glucan
Mesorhizobium huakuii
MALDI-TOF
osmoregulation
Opis:
Periplasmic and extracellular glucans of Mesorhizobium huakuii were isolated and characterized by compositional and MALDI-TOF analyses, as well as 1H and 13C NMR spectroscopy. It was shown that M. huakuii produces a cyclic β-glucan composed entirely of nonbranched glucose chains and unmodified by nonsugar substituents. The degree of polymerisation of the cyclic oligosaccharides was estimated to be in the range from 17 to 28. The most abundant glucan molecules contained 22 glucose residues. Glucose residues within the glucan were connected by β-(1,2) glycosidic linkages. The cyclic glucan produced by M. huakuii is quite similar to the periplasmic β-(1,2) glucans synthesized by Agrobacterium and Sinorhizobium genera. The synthesis of β-glucan in M. huakuii is osmoregulated and this glucan could function as an osmoprotectant in free living cells.
Źródło:
Acta Biochimica Polonica; 2003, 50, 4; 1273-1281
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rhizobium strains differ considerably in outer membrane permeability and polymyxin B resistance
Autorzy:
Komaniecka, Iwona
Zamłyńska, Katarzyna
Zan, Radosław
Staszczak, Magdalena
Pawelec, Jarosław
Seta, Irena
Choma, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1038773.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
rhizobium
outer membrane
lipopolysaccharide
N-phenyl-1-naphthylamine
NPN
polymyxin B
Opis:
Six rhizobium (Rhizobium leguminosarum bv. Trifolii TA1, Sinorhizobium meliloti 1021, Mesorhizobium huakuii IFO 15243T, Ochrobactrum lupini LUP 21T, Bradyrhizobium japonicum USDA110 and B. elkanii USDA 76) and two Escherichia coli strains (E. coli ATCC 25922 and E. coli HB 101) were compared in respect to polymyxin B and EDTA resistance, as well as bacterial outer membrane (OM) permeability to a fluorescent hydrophobic agent (N-phenyl-1-naphthylamine - NPN). TEM (Transmission Electron Microscopy) and a microbial test demonstrated that all the rhizobia were much more resistant to polymyxin B in comparison with E. coli strains. EDTA and polymyxin B enhance permeability of B. japonicum and O. lupini OM. Other rhizobia incorporated NPN independently of the presence of membrane-deteriorating agents; however, the level of fluorescence (measured as NPN absorption) was strain dependent.
Źródło:
Acta Biochimica Polonica; 2016, 63, 3; 517-525
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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