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1. (Article ID: 7182)
Bernabé M, Salvachúa D, Jiménez-Barbero J, Leal JA, Prieto A
Structures of wall heterogalactomannans isolated from three genera of entomopathogenic fungi
Fungal Biology 115(9) (2011)
862-870
O-linked heterogalactomannans with similar structural features have been purified from the fungal walls of the entomopathogenic fungi Lecanicillium muscarium, Beauveria bassiana, Beauveria brongniartii, and Cordyceps sphingum. Their composition and structure have been determined using acid hydrolysis, methylation analysis, gas-liquid chromatography-mass spectrometry (GC-MS) and Nuclear magnetic resonance spectroscopy (NMR). All structures have an α-(1→6)-mannose backbone, but one of the two strains of L. muscarium included in this study contained an acidic heterogalactomannan instead of the neutral polysaccharide isolated in the rest of the species analyzed. Sequence analysis of the internal transcribed spacer (ITS) region of this strain indicated that it belongs to the related genus Simplicillium, displaying low identity (83 %) with the closest Lecanicillium species. This is a new demonstration of the structural diversity of fungal wall heteromannans and validates their interest as chemotaxonomic markers. The production of a pullulan-like extracellular polysaccharide in strain CBS 413.70C of L. muscarium is also reported.
cell wall, nuclear magnetic resonance spectroscopy, fungi, galactomannans, entomopathogenic, O-linked polysaccharides
NCBI PubMed ID: 21872183Publication DOI: 10.1016/j.funbio.2011.06.015Journal NLM ID: 101524465Publisher: Amsterdam: Elsevier
Correspondence: aliprieto
cib.csic.es
Institutions: Departamento de Química Orgánica Biológica, Instituto de Química Orgánica, Madrid, Spain, Centro de Investigaciones Biolóogicas, CSIC, Madrid, Spain
Methods: 13C NMR, 1H NMR, GLC-MS, NMR-2D, acid hydrolysis, NMR-1D, methylation analysis, SEC
The publication contains the following compound(s):
- Compound ID: 18355
|
b-D-Manp-(1-4)-a-D-GlcpA-(1-2)-b-D-Galf-(1-6)-b-D-Galf-(1-2)-+ b-D-Galf-(1-6)-b-D-Galf-(1-5)-b-D-Galf-(1-6)-b-D-Galf-(1-2)-+
| |
-6)-{{{-a-D-Manp-(1-6)-}}}/n=11/-a-D-Manp-(1-6)-a-D-Manp-(1-6)-a-D-Manp-(1-6)-{{{-a-D-Manp-(1-6)-}}}/n=6/-a-D-Manp-(1-6)-a-D-Manp-(1-6)-a-D-Manp-(1- |
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Structure type: structural motif or average structure
Compound class: cell wall polysaccharide
- Compound ID: 12430
Structure type: polymer chemical repeating unit
Trivial name: pullulan
Compound class: EPS, O-polysaccharide, cell wall polysaccharide, glucan, polysaccharide
Reference(s) to other database(s): GTC:G71532WE, CCSD:
45938, CBank-STR:4859, GenDB:KY767023; GenDB:KY767024
- Compound ID: 18356
|
b-D-Galf-(1-2)-+ a-D-Galf-(1-2)-b-D-Galf-(1-2)-+ b-D-Galp-(1-4)-+
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-6)-a-D-Manp-(1-6)-a-D-Manp-(1-6)-{{{-a-D-Manp-(1-6)-}}}/n=5/-a-D-Manp-(1-6)-a-D-Manp-(1-6)-a-D-Manp-(1-6)-a-D-Manp-(1-6)-{{{-a-D-Manp-(1-6)-}}}/n=13/-a-D-Manp-(1-6)-a-D-Manp-(1-6)-a-D-Manp-(1-6)-a-D-Manp-(1-6)-{{{-a-D-Manp-(1-6)-}}}/n=20/-a-D-Manp-(1-6)-a-D-Manp-(1- |
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Structure type: structural motif or average structure
Compound class: cell wall polysaccharide, galactomannan
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