Supergiant ampholytic sugar chains with imbalanced charge ratio form saline ultra-absorbent hydrogels

Maiko K. Okajima, Takeshi Bamba, Yasuhiro Kaneso, Kazumasa Hirata, Eiichiro Fukusaki, Shin'Ichiro Kajiyama, Tatsuo Kaneko

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

A novel sugar chain (SC) with an ultrahigh molecular weight and an imbalanced charge ratio was extracted from the jellylike extracellular matrix (ECM) of a freshwater unicellular cyanobacterium, Aphanothece Sacrum. Fourier transform ion cyclotron resonance mass spectroscopy (FT-ICR-MS) analyses of the extracted SC demonstrated the presence sulfated muramic acid as a chain constituent, which indicates that the SC, was novel. These sugar chains, named sacran, was observed to be an extremely high molecular weight polysaccharide composed of a high content of anionic sugars with a low content of cationic sugars. Sacran were soluble in hot water to give a homogeneous solution regardless of pH and formed a physical hydrogel after cooling. Atomic force microscopy of sacran revealed that the sacran gels formed network structures containing nanolooped chains which exhibited a salt-induced transformation into extended rodlike chains.

Original languageEnglish
Pages (from-to)4061-4064
Number of pages4
JournalMacromolecules
Volume41
Issue number12
DOIs
Publication statusPublished - Jun 24 2008

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Hydrogels
Sugars
Muramic Acids
Molecular weight
Cyclotron resonance
Hydrogel
Polysaccharides
Atomic force microscopy
Fourier transforms
Gels
Salts
Spectroscopy
Ions
Cooling
Acids
sacran
Water

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Okajima, M. K., Bamba, T., Kaneso, Y., Hirata, K., Fukusaki, E., Kajiyama, SI., & Kaneko, T. (2008). Supergiant ampholytic sugar chains with imbalanced charge ratio form saline ultra-absorbent hydrogels. Macromolecules, 41(12), 4061-4064. https://doi.org/10.1021/ma800307w

Supergiant ampholytic sugar chains with imbalanced charge ratio form saline ultra-absorbent hydrogels. / Okajima, Maiko K.; Bamba, Takeshi; Kaneso, Yasuhiro; Hirata, Kazumasa; Fukusaki, Eiichiro; Kajiyama, Shin'Ichiro; Kaneko, Tatsuo.

In: Macromolecules, Vol. 41, No. 12, 24.06.2008, p. 4061-4064.

Research output: Contribution to journalArticle

Okajima, MK, Bamba, T, Kaneso, Y, Hirata, K, Fukusaki, E, Kajiyama, SI & Kaneko, T 2008, 'Supergiant ampholytic sugar chains with imbalanced charge ratio form saline ultra-absorbent hydrogels', Macromolecules, vol. 41, no. 12, pp. 4061-4064. https://doi.org/10.1021/ma800307w
Okajima, Maiko K. ; Bamba, Takeshi ; Kaneso, Yasuhiro ; Hirata, Kazumasa ; Fukusaki, Eiichiro ; Kajiyama, Shin'Ichiro ; Kaneko, Tatsuo. / Supergiant ampholytic sugar chains with imbalanced charge ratio form saline ultra-absorbent hydrogels. In: Macromolecules. 2008 ; Vol. 41, No. 12. pp. 4061-4064.
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