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1. (Article ID: 4962)
 
Streshinskaia GM, Shashkov AS, Tul'skaya EM, Senchenkova SN, Dmitrenok AS, Piskunkova NF, Bueva OV, Evtushenko LI
Cell wall glycopolymers of type strains from three species of the genus Actinoplanes
Biochemistry (Moscow) 81(9) (2016) 999-1012
 

The structures of cell wall glycopolymers from the type strains of three Actinoplanes species were investigated using chemical methods, NMR spectroscopy, and mass spectrometry. Actinoplanes digitatis VKM Ac-649(T) contains two phosphate-containing glycopolymers: poly(diglycosyl-1-phosphate) →6)-α-D-GlcpNAc-(1-P-6)-α-D-GlcpN-(1→ and teichoic acid →1)-sn-Gro-(3-P-3)-β-[β-D-GlcpNAc-(1→2]-D-Galp-(1→. Two glycopolymers were identified in A. auranticolor VKM Ac-648(T) and A. cyaneus VKM Ac-1095(T): minor polymer - unsubstituted 2,3-poly(glycerol phosphate), widely abundant in actinobacteria (Ac-648(T)), and mannan with trisaccharide repeating unit →2)-α-D-Manp-(1→2)-α-D-Manp-(1→6)-α-D-Manp-(1→ (Ac-1095(T)). In addition, both microorganisms contain a teichuronic acid of unique structure containing a pentasaccharide repeating unit with two residues of glucopyranose and three residues of diaminouronic acids in D-manno- and/or D-gluco-configuration. Each of the strains demonstrates peculiarities in the structure of teichuronic acid with respect to the ratio of diaminouronic acids and availability and location of O-methyl groups in glucopyranose residues. All investigated strains contain a unique set of glycopolymers in their cell walls with structures not described earlier for prokaryotes.

NMR spectroscopy, cell wall, teichoic acid, mannan, teichuronic acid, Actinoplanes, glycosyl-1-phosphate polymers

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