DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Structural adaptation of fungal cell wall in hypersaline environment

Journal Article · · Nature Communications
 [1]; ORCiD logo [2];  [3];  [4]; ORCiD logo [2]; ORCiD logo [5]; ORCiD logo [6];  [7]; ORCiD logo [2]; ORCiD logo [4]
  1. Univ. of Georgia, Athens, GA (United States); Michigan State Univ., East Lansing, MI (United States)
  2. Universidad Autónoma del Estado de Morelos, Cuernavaca (Mexico)
  3. Univ. of Michigan, Ann Arbor, MI (United States); Michigan State Univ., East Lansing, MI (United States)
  4. Michigan State Univ., East Lansing, MI (United States)
  5. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Environmental Molecular Sciences Laboratory (EMSL)
  6. Univ. of Ljubljana (Slovenia)
  7. Univ. of Crete, Heraklion (Greece); University of Angers (France)

Halophilic fungi thrive in hypersaline habitats and face a range of extreme conditions. These fungal species have gained considerable attention due to their potential applications in harsh industrial processes, such as bioremediation and fermentation under unfavorable conditions of hypersalinity, low water activity, and extreme pH. However, the role of the cell wall in surviving these environmental conditions remains unclear. Here we employ solid-state NMR spectroscopy to compare the cell wall architecture of Aspergillus sydowii across salinity gradients. Analyses of intact cells reveal that A. sydowii cell walls contain a rigid core comprising chitin, β-glucan, and chitosan, shielded by a surface shell composed of galactomannan and galactosaminogalactan. When exposed to hypersaline conditions, A. sydowii enhances chitin biosynthesis and incorporates α-glucan to create thick, stiff, and hydrophobic cell walls. Such structural rearrangements enable the fungus to adapt to both hypersaline and salt-deprived conditions, providing a robust mechanism for withstanding external stress. These molecular principles can aid in the optimization of halophilic strains for biotechnology applications.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); National Institutes of Health (NIH); USDOE
Grant/Contract Number:
AC05-76RL01830; AI173270
OSTI ID:
2204730
Alternate ID(s):
OSTI ID: 2328593
Report Number(s):
PNNL-SA-193998
Journal Information:
Nature Communications, Vol. 14, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

References (83)

Hidden motions and motion-induced invisibility: Dynamics-based spectral editing in solid-state NMR journal September 2018
Galactofuranose containing molecules in Aspergillus fumigatus journal January 2009
Galactomannan Produced by Aspergillus fumigatus: An Update on the Structure, Biosynthesis and Biological Functions of an Emblematic Fungal Biomarker journal November 2020
Solid-state NMR spectroscopy journal January 2021
Phylogeny of xerophilic aspergilli (subgenus Aspergillus) and taxonomic revision of section Restricti journal September 2017
Stress Reshapes the Physiological Response of Halophile Fungi to Salinity journal February 2020
Water–Polysaccharide Interactions in the Primary Cell Wall of Arabidopsis thaliana from Polarization Transfer Solid-State NMR journal July 2014
Aspergillus sydowii and Other Potential Fungal Pathogens in Gorgonian Octocorals of the Ecuadorian Pacific journal November 2016
Strategies of adaptation of microorganisms of the three domains of life to high salt concentrations journal February 2018
First demonstration that ascomycetous halophilic fungi (Aspergillus sydowii and Aspergillus destruens) are useful in xenobiotic mycoremediation under high salinity conditions journal May 2019
Morphological Response of the Halophilic Fungal Genus Wallemia to High Salinity journal January 2010
Chitinases and Peptide Mimotopes journal January 2005
Identifying candidate Aspergillus pathogenicity factors by annotation frequency journal November 2020
The Fungal Cell Wall: Structure, Biosynthesis, and Function journal June 2017
Galactosaminogalactan (GAG) and its multiple roles in Aspergillus pathogenesis journal January 2019
Structural Rearrangements of Membrane Proteins Probed by Water-Edited Solid-State NMR Spectroscopy journal January 2009
Structural Polymorphism of Chitin and Chitosan in Fungal Cell Walls From Solid-State NMR and Principal Component Analysis journal August 2021
Molecular Organization of the Alkali-insoluble Fraction ofAspergillus fumigatus Cell Wall journal September 2000
Genome and transcriptome sequencing of the halophilic fungus Wallemia ichthyophaga: haloadaptations present and absent journal January 2013
Integrative Model of Oxidative Stress Adaptation in the Fungal Pathogen Candida albicans journal September 2015
Aspergillus atacamensis and A. salisburgensis: two new halophilic species from hypersaline/arid habitats with a phialosimplex-like morphology journal May 2017
Solid-state NMR of plant and fungal cell walls: A critical review journal June 2020
Solid-state NMR molecular snapshots of Aspergillus fumigatus cell wall architecture during a conidial morphotype transition journal January 2023
Halotolerant and halophilic fungi journal November 2009
Adaptation of Candida albicans to environmental pH induces cell wall remodelling and enhances innate immune recognition journal May 2017
Aspergillus Galactosaminogalactan Mediates Adherence to Host Constituents and Conceals Hyphal β-Glucan from the Immune System journal August 2013
1H-detected characterization of carbon–carbon networks in highly flexible protonated biomolecules using MAS NMR journal June 2023
Extremophiles: Life at the deep end journal October 2016
Haloadaptative Responses of Aspergillus sydowii to Extreme Water Deprivation: Morphology, Compatible Solutes, and Oxidative Stress at NaCl Saturation journal November 2020
Osmolyte Signatures for the Protection of Aspergillus sydowii Cells under Halophilic Conditions and Osmotic Shock journal May 2021
Biotechnological Applications of Halophilic Fungi: Past, Present, and Future book January 2019
Histoplasma capsulatum  -(1,3)-glucan blocks innate immune recognition by the beta-glucan receptor journal January 2007
CCMRD: a solid-state NMR database for complex carbohydrates journal March 2020
Osmoadaptation Strategy of the Most Halophilic Fungus, Wallemia ichthyophaga, Growing Optimally at Salinities above 15% NaCl journal January 2014
Characterization of Lignocellulolytic Activities from a Moderate Halophile Strain of Aspergillus caesiellus Isolated from a Sugarcane Bagasse Fermentation journal August 2014
A molecular vision of fungal cell wall organization by functional genomics and solid-state NMR journal November 2021
Glycosylphosphatidylinositol-anchored Glucanosyltransferases Play an Active Role in the Biosynthesis of the Fungal Cell Wall journal May 2000
Hydrophobins: multifunctional biosurfactants for interface engineering journal January 2019
Extremophiles as a source for novel enzymes journal June 2003
Architecture of the dynamic fungal cell wall journal October 2022
High-resolution solid-state carbon-13 nuclear magnetic resonance study of chitin journal July 1990
The Cell Wall of the Human Fungal Pathogen Aspergillus fumigatus : Biosynthesis, Organization, Immune Response, and Virulence journal September 2017
Modern Biophysics Redefines Our Understanding of Fungal Cell Wall Structure, Complexity, and Dynamics journal June 2022
Investigation of Dipolar-Mediated Water−Protein Interactions in Microcrystalline Crh by Solid-State NMR Spectroscopy journal June 2006
Characterization of the cell wall of a mushroom forming fungus at atomic resolution using solid-state NMR spectroscopy journal December 2020
Genomic adaptations of the halophilic Dead Sea filamentous fungus Eurotium rubrum journal May 2014
Transcriptomic analysis of polyaromatic hydrocarbon degradation by the halophilic fungus Aspergillus sydowii at hypersaline conditions journal August 2020
Characterization of Aspergillus sydowii (Thom et Church), a fungal pathogen of Caribbean sea fan corals journal September 2001
Halophiles and their enzymes: negativity put to good use journal June 2015
Back to the Salt Mines: Genome and Transcriptome Comparisons of the Halophilic Fungus Aspergillus salisburgensis and Its Halotolerant Relative Aspergillus sclerotialis journal May 2019
Mild Heat Stress Affects on the Cell Wall Structure in Candida albicans Biofilm journal January 2019
Life in extreme environments journal February 2001
Molecular architecture of fungal cell walls revealed by solid-state NMR journal July 2018
High-resolution solid-state carbon-13 NMR study of chitosan and its salts with acids: conformational characterization of polymorphs and helical structures as viewed from the conformation-dependent carbon-13 chemical shifts journal October 1987
The Dual Activity Responsible for the Elongation and Branching of β-(1,3)-Glucan in the Fungal Cell Wall journal July 2017
Tailoring NMR experiments for structural characterization of amorphous biological solids: A practical guide journal October 2020
Deletion of the α-(1,3)-Glucan Synthase Genes Induces a Restructuring of the Conidial Cell Wall Responsible for the Avirulence of Aspergillus fumigatus journal November 2013
Hydrophobins—Unique Fungal Proteins journal May 2012
Understanding Aspergillus fumigatus galactosaminogalactan biosynthesis: A few questions remain journal December 2023
What Are the Functions of Chitin Deacetylases in Aspergillus fumigatus? journal February 2020
Galactosaminogalactan activates the inflammasome to provide host protection journal December 2020
Through-Bond Carbon−Carbon Connectivities in Disordered Solids by NMR journal December 1999
Molecular insights into the complex mechanics of plant epidermal cell walls journal May 2021
Solid-state NMR spectroscopy identifies three classes of lipids in Cryptococcus neoformans melanized cell walls and whole fungal cells journal August 2020
Complex archaea that bridge the gap between prokaryotes and eukaryotes journal May 2015
In-Cell Solid-State NMR: An Emerging Technique for the Study of Biological Membranes journal December 2015
Enzymes of UDP-GlcNAc biosynthesis in yeast journal January 2006
Comparative genomics reveals high biological diversity and specific adaptations in the industrially and medically important fungal genus Aspergillus journal February 2017
The cell wall: a carbohydrate armour for the fungal cell journal October 2007
Secondary and Tertiary Structural Effects on Protein NMR Chemical Shifts: an ab Initio Approach journal June 1993
Direct observation of hierarchical protein dynamics journal April 2015
Broadband homonuclear correlation spectroscopy driven by combined R2nv sequences under fast magic angle spinning for NMR structural analysis of organic and biological solids journal July 2013
Osmotic adaptation of the halophilic fungus Hortaea werneckii: role of osmolytes and melanization journal December 2007
Living at the Extremes: Extremophiles and the Limits of Life in a Planetary Context journal April 2019
Recent advances in the understanding of the Aspergillus fumigatus cell wall journal February 2016
Proton to Carbon-13 INEPT in Solid-State NMR Spectroscopy journal December 2005
The Glycosylphosphatidylinositol-Anchored DFG Family Is Essential for the Insertion of Galactomannan into the β-(1,3)-Glucan–Chitin Core of the Cell Wall of Aspergillus fumigatus journal August 2019
Solid-State NMR Investigations of Extracellular Matrixes and Cell Walls of Algae, Bacteria, Fungi, and Plants journal December 2021
Deciphering the role of the chitin synthase families 1 and 2 in the in vivo and in vitro growth of A spergillus fumigatus by multiple gene targeting deletion: Family 1 and 2 chitin synthases in Aspergillus fumigatus journal August 2014
α- and β-1,3-Glucan Synthesis and Remodeling book January 2020
Probing Cell‐Surface Interactions in Fungal Cell Walls by High‐Resolution 1H‐Detected Solid‐State NMR Spectroscopy journal November 2022
Structural Adaptation of Fungal Cell Wall in Hypersaline Environment dataset January 2023
Comparative genomics reveals high biological diversity and specific adaptations in the industrially and medically important fungal genus Aspergillus collection January 2017

Figures / Tables (6)