Literature DB >> 24227602

Mechanism of gas-phase aldose-ketose isomerization: A study using tandem mass spectrometry and theoretical calculations.

Y J Zheng1, A Staempfli, J A Leary.   

Abstract

Fast-atom bombardment tandem mass spectrometry and the semiempirical molecular orbital method were used to investigate the mechanism of gas-phase aldose-ketose isomerization process in lithiated 1,3 linked disaccharide isomers. Both the 1,3 hydrogen shift and hydride transfer mechanisms were investigated. Our experimental and theoretical calculations support the latter. The hydride transfer mechanism in these lithium-coordrnated systems is similar to the xylose isomerase catalyzed aldose-ketose isomerization.

Entities:  

Year:  1993        PMID： 24227602     DOI： 10.1016/1044-0305(93)80020-Y

Source DB:  PubMed          Journal:  J Am Soc Mass Spectrom        ISSN： 1044-0305            Impact factor:   3.109


  4 in total

1.  Oligosaccharide characterization with high-energy collision-induced dissociation mass spectrometry.

Authors:  B L Gillece-Castro; A L Burlingame
Journal:  Methods Enzymol       Date:  1990       Impact factor: 1.600

2.  An intramolecular C-2 leads to C-1 hydrogen transfer during the acid-catalyzed conversion of D-xylose to D-threo-pentulose (D-xylulose).

Authors:  S Ramchander; M S Feather
Journal:  Arch Biochem Biophys       Date:  1977-01-30       Impact factor: 4.013

3.  Crystallographic studies of the mechanism of xylose isomerase.

Authors:  G K Farber; A Glasfeld; G Tiraby; D Ringe; G A Petsko
Journal:  Biochemistry       Date:  1989-09-05       Impact factor: 3.162

4.  Protonated ethanol and its neutral counterparts.

Authors:  C Wesdemiotis; A Fura; F W McLafferty
Journal:  J Am Soc Mass Spectrom       Date:  1991-12       Impact factor: 3.109
  4 in total
  1 in total

1.  Chiral recognition in the gas phase: Mass spectrometric studies of diastereomeric cobalt complexes.

Authors:  T T Dang; S F Pedersen; J A Leary
Journal:  J Am Soc Mass Spectrom       Date:  1994-05       Impact factor: 3.109
  1 in total

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