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1. (Article ID: 5845)
Sigida EN, Kargapolova KY, Shashkov AS, Zdorovenko EL, Ponomaryova TS, Meshcheryakova AA, Tkachenko OV, Burygin GL, Knirel YA
Structure, gene cluster of the O antigen and biological activity of the lipopolysaccharide from the rhizospheric bacterium Ochrobactrum cytisi IPA7.2
International Journal of Biological Macromolecules 154 (2020)
1375-1381
Lipopolysaccharide (LPS) of Ochrobactrum cytisi IPA7.2, a bacterium isolated from the roots of Solanum tuberosum L., was extracted from dry bacterial cells and chemically characterized. The O-specific polysaccharide was obtained by mild acid hydrolysis of the LPS and studied by sugar analysis and (1)H and (13)C NMR spectroscopy, including (1)H,(1)H COSY, (1)H,(1)H TOCSY, (1)H,(1)H ROESY, (1)H,(13)C HSQC, and (1)H,(13)C HMBC experiments. The polysaccharide was linear and consisted of trisaccharide repeating units of the following structure: A putative O-antigen gene cluster of O. cytisi IPA7.2 was identified and found to be consistent with the O-specific polysaccharide structure. The LPS of Ochrobactrum cytisi IPA7.2 promoted the growth of potato microplants in vitro.
Lipopolysaccharide, O-Polysaccharide structure, Ochrobactrum cytisi, O-antigen biosynthesis gene cluster, Potato microplants
NCBI PubMed ID: 31730968Publication DOI: 10.1016/j.ijbiomac.2019.11.017Journal NLM ID: 7909578Publisher: Butterworth-Heinemann
Correspondence: si_elena
mail.ru
Institutions: Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Russia, Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Saratov 410049, Russia, Vavilov Saratov State Agrarian University, Saratov 410012, Russia, Chernyshevsky Saratov State University, Saratov 410012, Russia
Methods: 13C NMR, 1H NMR, NMR-2D, SDS-PAGE, GLC, mild acid hydrolysis, GC, de-O-acetylation, composition analysis, GPC, function analysis of gene clusters
The publication contains the following compound(s):
- Compound ID: 14937
Structure type: polymer chemical repeating unit
Compound class: O-polysaccharide
Reference(s) to other database(s): GTC:G32939RD
- Compound ID: 14938
|
-6)-a-D-Glcp-(1-4)-b-D-ManpNAcA-(1-4)-b-D-GlcpNAc3Ac6(50%)Ac-(1- |
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Structure type: polymer chemical repeating unit
Compound class: O-polysaccharide
Reference(s) to other database(s): GTC:G83227MO
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2. (Article ID: 5851)
Szpakowska N, Kowalczyk A, Jafra S, Kaczyński Z
The chemical structure of polysaccharides isolated from the Ochrobactrum rhizosphaerae PR17(T)
Carbohydrate Research 497 (2020)
108136
The bacteria from Ochrobactrum genus are commonly found in the soil and association with the roots of plants. The O-polysaccharide and the glucan were isolated from the Ochrobactrum rhizosphaerae PR17(T) strain. Purified polysaccharides were analysed using chemical methods and NMR spectroscopy. Sugar and absolute configuration assignment combined with NMR data revealed the chemical structure of the repeating unit of the O- [formula: see text].
NMR, structure, O-polysaccharide, glucan, Ochrobactrum rhizosphaerae PR17(T)
NCBI PubMed ID: 32889436Publication DOI: 10.1016/j.carres.2020.108136Journal NLM ID: 0043535Publisher: Elsevier
Correspondence: zbigniew.kaczynski
ug.edu.pl
Institutions: Faculty of Chemistry, University of Gdansk, Gdansk, Poland, Laboratory of Biological Plant Protection, Intercollegiate Faculty of Biotechnology of University of Gdansk and Medical University of Gdansk, University of Gdansk, Gdansk, Poland
Methods: 13C NMR, 1H NMR, NMR-2D, GC-MS, acid hydrolysis, GLC, composition analysis, acetylation, SEC, reduction with NaBH4
The publication contains the following compound(s):
- Compound ID: 431
Structure type: polymer chemical repeating unit
Compound class: O-polysaccharide
Reference(s) to other database(s): GTC:G23685LC, GlycomeDB:
26574
- Compound ID: 14965
|
/Variants 0/-+
|
-3)-b-D-GalpNAc-(1-3)-a-D-Fucp-(1-
/Variants 0/ is:
10%Pyr-(2-6:2-4)-
OR (exclusively)
10%Me-4)- |
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Structure type: polymer chemical repeating unit
Compound class: O-polysaccharide
- Compound ID: 14938
|
-6)-a-D-Glcp-(1-4)-b-D-ManpNAcA-(1-4)-b-D-GlcpNAc3Ac6(50%)Ac-(1- |
Show graphically |
Structure type: polymer chemical repeating unit
Compound class: O-polysaccharide
Reference(s) to other database(s): GTC:G83227MO
- Compound ID: 6655
Structure type: cyclic polymer repeating unit
; n=17-25
Trivial name: cyclosophoran, cyclic β-1,2-glucan, cyclic b-glucan
Compound class: EPS, glucan, cyclic b-glucan
Reference(s) to other database(s): GTC:G21553SY, GlycomeDB:
25048
- Compound ID: 14964
Structure type: polymer chemical repeating unit
Compound class: O-polysaccharide
Reference(s) to other database(s): GTC:G07468HH
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