Translated title: Modified Substrates in β-N-Acetylhexosaminidase-Catalyzed Synthesis
Authors: Bojarová, Pavla ; Křen, Vladimír (advisor) ; Moravcová, Jitka (referee) ; Walterová, Daniela (referee)
Document type: Doctoral theses
Year: 2006
Language: eng
Abstract: 4 Conclrrsion 4 CoNcrusroN This Ph. D. thesis is a systematic study of the substrate specificity and the synthetic potential of B-N-acetylhexosaminidases (EC 3.2.1.52) with structurally modified substrates. It comprises four publications in intemational journals, one review and 17 oral and poster contributions. The following parts of the substrate molecule were modified: 2-acetamido moiety, the C-6 hydroxyl (oxidations, introduction of a cyano group) and the aglycon part (glycosyl azides - C-N bond hydrolysis). Thirteen modified substrates were synthesized, seven of them were described for the first time. They were tested for hydrolysis and transglycosylation by over thirty fungal $-N-acetylhexosaminidases (culture collections at Charles University and at the Institute of Microbiology, Academy of Sciences of the Czech Republic) and the results were discussed in relation to the conclusions of molecular modeling (B-N-acetylhexosaminidase from Aspergillus oryzae CCF 1066). Eight oligosaccharidic structures (six of them novel) were prepared by semi- preparative transglycosylation reactions (tens of miligrams), isolated (mostly 16_377a yields, even 787o yie\ď) and fully characterized. Noteworthy properties like immunoactivity (binding to natural killer cell activation receptors) and inhibitory potential were...

Institution: Charles University Faculties (theses) (web)
Document availability information: Available in the Charles University Digital Repository.
Original record: http://hdl.handle.net/20.500.11956/95723

Permalink: http://www.nusl.cz/ntk/nusl-374295


The record appears in these collections:
Universities and colleges > Public universities > Charles University > Charles University Faculties (theses)
Academic theses (ETDs) > Doctoral theses
 Record created 2018-04-18, last modified 2022-03-04


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