Predicting the Chemical Composition and Structure of Aspergillus nidulans Hyphal Wall Surface by Atomic Force Microscopy

Hyun-uk Lee; Jong Bae Park; Haeseong Lee; Keon-Sang Chae; Dong-Min Han; Kwang-Yeop Jahng

doi:10.1007/s12275-010-8094-4

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Research Support, Non-U.S. Gov't
Predicting the Chemical Composition and Structure of Aspergillus nidulans Hyphal Wall Surface by Atomic Force Microscopy: Hyun-uk Lee ^1,2, Jong Bae Park ², Haeseong Lee ², Keon-Sang Chae ^1,3, Dong-Min Han ⁴, Kwang-Yeop Jahng ^1,2,3; Journal of Microbiology 2010;48(2):243-248.
DOI: https://doi.org/10.1007/s12275-010-8094-4
Published online: May 1, 2010

¹Division of Biological Sciences, Chonbuk National University, Jeonju 561-756, Republic of Korea, ²Jeonju Center of Korea Basic Science Institute, Jeonju 561-756, Republic of Korea, ³Institute for Basic Sciences, Institute for Molecular Biology and Genetic Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea, ⁴Department of Biosciences, Wonkwang University, Iksan 570-749, Republic of Korea

Corresponding author: Kwang-Yeop Jahng , Tel: +82-63-270-3358,

Received: 17 April 2008 • Accepted: 25 September 2009

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Abstract

In fungi, cell wall plays an important role in growth and development. Major macromolecular constituents of the aspergilli cell wall are glucan, chitin, and protein. We examined the chemical composition and structure of the Aspergillus nidulans hyphal wall surface by an atomic force microscope (AFM). To determine the composition of the cell wall surface, the adhesion forces of commercially available β-glucan, chitin, and various proteins were compared to those of corresponding fractions prepared from the hyphal wall. In both setups, the adhesion forces of β-glucan, chitin, and protein were 25-50, 1000-3000, and 125-300 nN, respectively. Adhesion force analysis demonstrated that the cell surface of the apical tip region might contain primarily chitin and β-glucan and relatively a little protein. This analysis also showed the chemical composition of the hyphal surface of the mid-region would be different from that of the apical region. Morphological images obtained by the tapping mode of AFM revealed that the hyphal tip surface has moderate roughness.

Keywords: A. nidulans;atomic force microscopy;hyphal wall;adhesion force

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Predicting the Chemical Composition and Structure of Aspergillus nidulans Hyphal Wall Surface by Atomic Force Microscopy

J. Microbiol. 2010;48(2):243-248. Published online May 1, 2010

DOI: https://doi.org/10.1007/s12275-010-8094-4

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