Abstract
Preliminary taxonomic characterization of isolate L420-91 has revealed that this organism is closely related to the speciesBacillus aneurinolyticus. The bacterium is covered by a squarely arranged crystalline surface layer composed of identical glycoprotein subunits with an apparent molecular mass in the range of 109 kDa. A total carbohydrate content of approximately 3.5% (wt/wt) was determined in the purified surface layer glycoprotein. Glycopeptides were obtained after exhaustive Pronase digestion and purification including gel filtration, ion exchange chromatography and HPLC. From the combined evidence of composition analysis, Smith degradation and nuclear magnetic resonance spectroscopy experiments we propose the following structure for the glycan chain of the surface layer glycoprotein:
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Abbreviations
- S-layer:
-
crystalline surface layer
- SDS-PAGE:
-
sodium dodecyl sulphate polyacrylamide gel electrophoresis
- RP-HPLC:
-
reversed phase high performance liquid chromatography
- HPAEC:
-
high performance anion exchange chromatography
- TFA:
-
trifluoroacetic acid
- NMR:
-
nuclear magnetic resonance spectroscopy
- COSY:
-
correlated spectroscopy
- TOCSY:
-
total correlated spectroscopy
- NOE:
-
nuclear Overhauser enhancement
- dRha:
-
d-rhamnose
- dFuc3NAc:
-
3-acetamido-3-deoxy-d-fucose
- Man:
-
mannose
- Gro:
-
glycerol
- Thr:
-
threonine
- Gly:
-
glycine
- Tyr:
-
tyrosine
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Kosma, P., Neuninger, C., Christian, R. et al. Glycan structure of the S-layer glycoprotein ofBacillus sp. L420-91. Glycoconjugate J 12, 99–107 (1995). https://doi.org/10.1007/BF00731875
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DOI: https://doi.org/10.1007/BF00731875