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dc.contributor.authorHigashi, Kyohei
dc.contributor.authorLy, Mellisa
dc.contributor.authorWang, Zhenyu
dc.contributor.authorMasuko, Sayaka
dc.contributor.authorBhaskar, Ujjwal
dc.contributor.authorSterner, Eric
dc.contributor.authorZhang, Fuming
dc.contributor.authorToida, Toshihiko
dc.contributor.authorDordick, Jonathan S.
dc.contributor.authorLinhardt, Robert J.
dc.date2011
dc.date.accessioned2022-06-23T04:11:27Z
dc.date.available2022-06-23T04:11:27Z
dc.date.issued2011-08-30
dc.identifier.citationControlled Photochemical Depolymerization of K5 Heparosan, a Bioengineered Heparin Precursor, K. Higashi, M. Ly, Z. Wang, S. Masuko, U. Bhaskar, E. Sterner, F. Zhang, T. Toida, J. S. Dordick, R. J. Linhardt, Carbohydrate Polymers, 86, 1365– 1370, 2011.
dc.identifier.issn1448617
dc.identifier.urihttps://hdl.handle.net/20.500.13015/5283
dc.identifier.urihttps://doi.org/10.1016/j.carbpol.2011.06.042
dc.descriptionCarbohydrate Polymers, 86, 1365– 1370
dc.descriptionNote : if this item contains full text it may be a preprint, author manuscript, or a Gold OA copy that permits redistribution with a license such as CC BY. The final version is available through the publisher’s platform.
dc.description.abstractHeparosan is a polysaccharide, which serves as the critical precursor in heparin biosynthesis and chemoenzymatic synthesis of bioengineered heparin. Because the molecular weight of microbial heparosan is considerably larger than heparin, the controlled depolymerization of microbial heparosan is necessary prior to its conversion to bioengineered heparin. We have previously reported that other acidic polysaccharides could be partially depolymerized with maintenance of their internal structure using a titanium dioxide-catalyzed photochemical reaction. This photolytic process is characterized by the generation of reactive oxygen species that oxidize individual saccharide residues within the polysaccharide chain. Using a similar approach, a microbial heparosan from Escherichia coli K5 of molecular weight >15,000 was depolymerized to a heparosan of molecular weight 8,000. The 1H-NMR spectra obtained showed that the photolyzed heparosan maintained the same structure as the starting heparosan. The polysaccharide chains of the photochemically depolymerized heparosan were also characterized by electrospray ionization-Fourier-transform mass spectrometry. While the chain of K5 heparosan starting material contained primarily an even number of saccharide residues, as a result of coliphage K5 lyase processing, both odd and even chain numbers were detected in the photochemically-depolymerized heparosan. These results suggest that the photochemical depolymerization of heparosan was a random process that can take place at either the glucuronic acid or the N-acetylglucosamine residue within the heparosan polysaccharide.
dc.description.sponsorshipNational Institutes of Health
dc.languageen_US
dc.language.isoENG
dc.publisherElsevier
dc.relation.ispartofThe Linhardt Research Labs Online Collection
dc.relation.ispartofRensselaer Polytechnic Institute, Troy, NY
dc.relation.ispartofCarbohydrate Polymers
dc.relation.urihttps://harc.rpi.edu/
dc.subjectBiology
dc.subjectChemistry and chemical biology
dc.subjectChemical and biological engineering
dc.subjectBiomedical engineering
dc.titleControlled Photochemical Depolymerization of K5 Heparosan, a Bioengineered Heparin Precursor
dc.typeArticle
dcterms.accessRightsA full text version is available in DSpace@RPI
dcterms.isPartOfJournal
dcterms.isVersionOfhttps://doi.org/10.1016/j.carbpol.2011.06.042
dc.rights.holderIn Copyright : this Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). https://rightsstatements.org/page/InC/1.0/
dc.creator.identifierhttps://orcid.org/0000-0003-2219-5833
dc.relation.departmentThe Linhardt Research Labs.
dc.relation.departmentThe Shirley Ann Jackson, Ph.D. Center for Biotechnology and Interdisciplinary Studies (CBIS)
rpi.description.pages1365-1370
rpi.description.volume86


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