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Title: Structural Polymorphism of Chitin and Chitosan in Fungal Cell Walls From Solid-State NMR and Principal Component Analysis

Journal Article · · Frontiers in Molecular Biosciences
 [1];  [1];  [2]; ORCiD logo [3]; ORCiD logo [3];  [4];  [5];  [2];  [1]
  1. Louisiana State Univ., Baton Rouge, LA (United States)
  2. Tennessee Technological Univ., Cookeville, TN (United States)
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  4. Inst. Pasteur, Paris (France); Univ. of Crete, Heraklion (Greece)
  5. Louisiana State Univ. Health Sciences Center, New Orleans, LA (United States)

Chitin is a major carbohydrate component of the fungal cell wall and a promising target for novel antifungal agents. However, it is technically challenging to characterize the structure of this polymer in native cell walls. Here, we recorded and compared 13C chemical shifts of chitin using isotopically enriched cells of six Aspergillus, Rhizopus, and Candida strains, with data interpretation assisted by principal component analysis (PCA) and linear discriminant analysis (LDA) methods. The structure of chitin is found to be intrinsically heterogeneous, with peak multiplicity detected in each sample and distinct fingerprints observed across fungal species. Fungal chitin exhibits partial similarity to the model structures of α- and γ-allomorphs; therefore, chitin structure is not significantly affected by interactions with other cell wall components. Addition of antifungal drugs and salts did not significantly perturb the chemical shifts, revealing the structural resistance of chitin to external stress. In addition, the structure of the deacetylated form, chitosan, was found to resemble a relaxed two-fold helix conformation. This study provides high-resolution information on the structure of chitin and chitosan in their cellular contexts. The method is applicable to the analysis of other complex carbohydrates and polymer composites.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1827281
Report Number(s):
PNNL-SA--163339
Journal Information:
Frontiers in Molecular Biosciences, Journal Name: Frontiers in Molecular Biosciences Vol. 8; ISSN 2296-889X
Publisher:
Frontiers Media S.A.Copyright Statement
Country of Publication:
United States
Language:
English

References (66)

DNP‐Supported Solid‐State NMR Spectroscopy of Proteins Inside Mammalian Cells journal July 2019
Two-dimensional magic angle spinning NMR investigation of naturally occurring chitins: Precise1H and13C resonance assignment of ?- and ?-chitin journal January 2004
First evidence of the presence of chitin in skeletons of marine sponges. Part II. Glass sponges (Hexactinellida: Porifera)
  • Ehrlich, Hermann; Krautter, Manfred; Hanke, Thomas
  • Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, Vol. 308B, Issue 4 https://doi.org/10.1002/jez.b.21174
journal January 2007
Hydrogen Bonding Structure and Stability of?-Chitin Studied by13C Solid-State NMR journal February 2005
Substituent effects on1H and13C NMR chemical shifts in ?-monosubstituted ethyl acetates: principal component analysis and1H chemical shift calculations journal January 2002
Physicochemical characterization of ?-chitin, ?-chitin, and ?-chitin separated from natural resources journal January 2004
Whole cell solid-state NMR study of Chlamydomonas reinhardtii microalgae journal January 2018
CCMRD: a solid-state NMR database for complex carbohydrates journal March 2020
Determination of the degree of N-acetylation for chitin and chitosan by various NMR spectroscopy techniques: A review journal March 2010
Biomedical applications of chitin and chitosan based nanomaterials—A short review journal September 2010
On chemistry of γ-chitin journal November 2017
Three D structures of chitosan journal April 2004
Exhaustive crystal structure search and crystal modeling of β-chitin journal March 2007
Can fungi compete with marine sources for chitosan production? journal November 2017
Isolation and identification of chitin from heavy mineralized skeleton of Suberea clavata (Verongida: Demospongiae: Porifera) marine demosponge journal November 2017
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
Chitin-based scaffolds are an integral part of the skeleton of the marine demosponge Ianthella basta journal December 2009
Studying intact bacterial peptidoglycan by proton-detected NMR spectroscopy at 100 kHz MAS frequency journal April 2019
Chitin synthesis and fungal pathogenesis journal August 2010
Chitin and chitosan: Properties and applications journal July 2006
Chitin and chitosan polymers: Chemistry, solubility and fiber formation journal July 2009
Solid-state NMR of plant and fungal cell walls: A critical review journal June 2020
Tailoring NMR experiments for structural characterization of amorphous biological solids: A practical guide journal October 2020
Characterization of the cell wall of a mushroom forming fungus at atomic resolution using solid-state NMR spectroscopy journal December 2020
Structural diversity of chitosan and its complexes journal March 2000
Nature, Strength, and Cooperativity of the Hydrogen-Bonding Network in α-Chitin journal February 2016
Cellulose Structural Polymorphism in Plant Primary Cell Walls Investigated by High-Field 2D Solid-State NMR Spectroscopy and Density Functional Theory Calculations journal May 2016
Conformational Properties Relevant to the Amyloidogenicity of β 2 -Microglobulin Analyzed Using Pressure- and Salt-Dependent Chemical Shift Data journal January 2019
Enzymatic Degradation of Nanosized Chitin Whiskers with Different Degrees of Deacetylation journal August 2019
Measuring the Purity of Chitin with a Clean, Quantitative Solid-State NMR Method journal July 2017
Solid State NMR for Determination of Degree of Acetylation of Chitin and Chitosan journal November 2000
Direct Determination of the Hydrogen Bonding Arrangement in Anhydrous β-Chitin by Neutron Fiber Diffraction journal December 2011
Revisit of α-Chitin Crystal Structure Using High Resolution X-ray Diffraction Data journal May 2009
Characterization of Chitin and Chitosan Molecular Structure in Aqueous Solution journal November 2008
Structural Polymorphism of Alzheimer’s β-Amyloid Fibrils as Controlled by an E22 Switch: A Solid-State NMR Study journal July 2016
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
High-resolution solid-state carbon-13 nuclear magnetic resonance study of chitin journal July 1990
Cellulose stacks up journal December 2003
Structural variation in amyloid-β fibrils from Alzheimer's disease clinical subtypes journal January 2017
Amphotericin forms an extramembranous and fungicidal sterol sponge journal March 2014
Interactions of fungal pathogens with phagocytes journal February 2016
Molecular architecture of fungal cell walls revealed by solid-state NMR journal July 2018
Lignin-polysaccharide interactions in plant secondary cell walls revealed by solid-state NMR journal January 2019
Solid-state NMR spectroscopy journal January 2021
Principal component analysis of the pH-dependent conformational transitions of bovine beta-lactoglobulin monitored by heteronuclear NMR journal September 2007
Melanin deposition in two Cryptococcus species depends on cell-wall composition and flexibility journal February 2020
Review of Newer Antifungal and Immunomodulatory Strategies for Invasive Aspergillosis journal October 2003
Deciphering the uniqueness of Mucoromycotina cell walls by combining biochemical and phylogenomic approaches: The unique features of Mucoromycotina cell walls journal September 2014
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
The cell wall: a carbohydrate armour for the fungal cell journal October 2007
Individual chitin synthase enzymes synthesize microfibrils of differing structure at specific locations in the Candida albicans cell wall journal December 2007
Hidden Killers: Human Fungal Infections journal December 2012
The Paradoxical Effect of Echinocandins in Aspergillus fumigatus Relies on Recovery of the β-1,3-Glucan Synthase Fks1 journal February 2017
Aspergillus fumigatus and Aspergillosis in 2019 journal November 2019
Pharmacokinetics of Nikkomycin Z after Single Rising Oral Doses journal June 2009
The Fungal Cell Wall: Structure, Biosynthesis, and Function journal June 2017
The Cell Wall of the Human Fungal Pathogen Aspergillus fumigatus : Biosynthesis, Organization, Immune Response, and Virulence journal September 2017
Cell wall stress induces alternative fungal cytokinesis and septation strategies journal January 2013
Genomic Analysis of the Basal Lineage Fungus Rhizopus oryzae Reveals a Whole-Genome Duplication journal July 2009
Water in Crystalline Fibers of Dihydrate β-Chitin Results in Unexpected Absence of Intramolecular Hydrogen Bonding journal June 2012
What Are the Functions of Chitin Deacetylases in Aspergillus fumigatus? journal February 2020
Polysaccharides Cell Wall Architecture of Mucorales journal March 2019
Stress Reshapes the Physiological Response of Halophile Fungi to Salinity journal February 2020
Unambiguous Ex Situ and in Cell 2D 13C Solid-State NMR Characterization of Starch and Its Constituents journal November 2018
Unconventional Constituents and Shared Molecular Architecture of the Melanized Cell Wall of C. neoformans and Spore Wall of S. cerevisiae journal December 2020
Preparation of Fungal and Plant Materials for Structural Elucidation Using Dynamic Nuclear Polarization Solid-State NMR
  • Kirui, Alex; Dickwella Widanage, Malitha C.; Mentink-Vigier, Frederic
  • Journal of Visualized Experiments, Issue 144 https://doi.org/10.3791/59152
journal January 2019