Accurate determination of the molecular weight of the major surface layer protein isolated from Clostridium thermosaccharolyticum by time-of-flight mass spectrometry.

Accurate determination of the molecular weight of the major surface layer protein isolated from Clostridium thermosaccharolyticum by time-of-flight mass spectrometry. Research Abstract Details 

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Accurate determination of the molecular weight of the major surface layer protein isolated from Clostridium thermosaccharolyticum by time-of-flight mass spectrometry. Abstract Text:

Matrix-assisted laser desorption with concomitant ionization, in combination with a linear time-of-flight mass spectrometer, was used to analyze underivatized and hard-to-solubilize surface layer proteins and glycoproteins by depositing them on top of a microcrystalline layer of the matrix alpha-cyano-4-hydroxycinnamic acid. Use of this special sample preparation technique allowed the first successful desorption-ionization of intact surface layer proteins and accurate determination of their molecular weights by mass spectrometry. The molecular mass of the monomeric subunit of the major surface layer protein isolated from Clostridium thermosaccharolyticum E207-71 was determined to be 75,621 +/- 81 Da. The obtainable mass accuracy of the technique is conservatively considered to be within +/- 0.2%. This result deviates from that given by sodium dodecyl sulfate-polyacrylamide gel electrophoresis by approximately 7.4 kDa because this method is strongly affected and biased by the three-dimensional structure of this type of surface protein. With the apparent advantages of unsurpassed mass accuracy, low dependence on the physicochemical properties of the surface layer proteins, and high sensitivity, it can be concluded that a linear time-of-flight instrument combined with UV matrix-assisted laser desorption with concomitant ionization is better suited for molecular weight determination than is gel electrophoresis.

Accurate determination of the molecular weight of the major surface layer protein isolated from Clostridium thermosaccharolyticum by time-of-flight mass spectrometry. Publishing Authors By Initials

For similar natural sciences: chemistry: chemistry, physical: molecular weight research abstracts see: natural sciences: chemistry: chemistry, physical: molecular weight research

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Accurate determination of the molecular weight of the major surface layer protein isolated from Clostridium thermosaccharolyticum by time-of-flight mass spectrometry. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Journal of bacteriology

VOLUME: 177

Page Numbers: 1402-4

Journal Abbreviation: J. Bacteriol.

ISSN: 0021-9193

DAY: 24

MONTH: Mar

YEAR: 1995

Accurate determination of the molecular weight of the major surface layer protein isolated from Clostridium thermosaccharolyticum by time-of-flight mass spectrometry. Information

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LANGUAGE: eng

NlmUniqueID: 2985120

Accurate determination of the molecular weight of the major surface layer protein isolated from Clostridium thermosaccharolyticum by time-of-flight mass spectrometry. Keywords Mesh Terms:

KEYWORDS: Molecular Weight

MESH TERMS: methods

Chemical & Substance for Abstract: Accurate determination of the molecular weight of the major surface layer protein isolated from Clostridium thermosaccharolyticum by time-of-flight mass spectrometry. Information

Substance Name: S-layer proteins

Registry Number: 0

Grant and Affiliation Information for Accurate determination of the molecular weight of the major surface layer protein isolated from Clostridium thermosaccharolyticum by time-of-flight mass spectrometry.

AFFILIATION: Institute for Analytical Chemistry, University of Vienna, Austria.

Country: UNITED STATES

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MEDLINETA: J Bacteriol

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