Analysis of E. coli K5 capsular polysaccharide heparosan

Ly, Mellisa
Wang, Zhenyu
Laremore, Tatiana N.
Zhang, Fuming
Zhong, Weihong
Pu, Dennis
Zagorevski, Dmitri V.
Dordick, Jonathan S.
Linhardt, Robert J.
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Biology , Chemistry and chemical biology , Chemical and biological engineering , Biomedical engineering
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Analysis of E. coli K5 capsular polysaccharide heparosan, M. Ly, Z. Wang, T. N. Laremore, F. Zhang, W. Zhong, D. Pu, D. V. Zagorevski, J. S. Dordick, R. J. Linhardt, Analytical and Bioanalytical Chemistry, 399, 737-745, 2011.
Heparosan is the key precursor for the preparation of bioengineered heparin, a potential replacement for porcine intestinal heparin, an important anticoagulant drug. The molecular weight (MW) distribution of heparosan produced by the fermentation of E. coli K5 was investigated. Large-slab isocratic and mini-slab gradient polyacrylamide gel electrophoresis (PAGE) were used to analyze the MW and polydispersity of heparosan. A preparative method that allowed fractionation by continuous-elution PAGE was used to obtain heparosan MW standards. The MWs of the heparosan standards were determined by electrospray ionization Fourier-transform mass spectrometry (ESI-FT-MS). A ladder of the standards was then used to determine the MW properties of polydisperse heparosan samples. Unbleached and bleached heparosan produced by fermentation of E. coli K5 had similar number-averaged MWs (M(N)), weight-averaged MWs (M(W)), and MW ranges of 3,000 to 150,000 Da.
Analytical and Bioanalytical Chemistry, 399, 737-745
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The Linhardt Research Labs.
The Shirley Ann Jackson, Ph.D. Center for Biotechnology and Interdisciplinary Studies (CBIS)
The Linhardt Research Labs Online Collection
Rensselaer Polytechnic Institute, Troy, NY
Analytical and Bioanalytical Chemistry
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