Glycobiology, Vol 9, 407-414, Copyright © 1999 by Oxford University Press
C Schaffer, N Muller, R Christian, M Graninger, T Wugeditsch, A Scheberl and P Messner
Isolate GS4-97 was purified from an extraction juice sample of an Austrian
beet sugar factory and affiliated to the newly described species
Aneurinibacillus thermoaerophilus. It is closely related to the type strain
of this species, A.thermoaerophilus L420-91(T), and possesses a square
surface layer (S-layer) array composed of identical glycoprotein monomers
as its outermost cell envelope component. By sodium dodecyl
sulfate-polyacrylamide gel electrophoresis, the purified S-layer showed an
apparent molecular mass of approximately 109,000. After thorough
proteolytic degradation of this material by pronase E and purification of
the reaction mixture by gel permeation, chromatofocusing, and
reversed-phase chromatography, a homogeneous glycopeptide fraction was
obtained which was subjected to one- and two- dimensional nuclear magnetic
resonance spectroscopy. The combined chemical and spectroscopic evidence,
together with N-terminal sequencing, suggest the following structure of the
O-glycosidically linked S-layer glycan chain of the glycopeptide: This is
the first description of a beta-d-GalNAc-Thr linkage in glycoproteins.
ORIGINAL ARTICLES
Complete glycan structure of the S-layer glycoprotein of Aneurinibacillus thermoaerophilus GS4-97
Zentrum fur Ultrastrukturforschung und Ludwig Boltzmann-Institut fur Molekulare Nanotechnologie, Universitat fur Bodenkultur, A-1180 Wien, Austria.
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