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Comparative Molecular Evolution of Trichoderma Chitinases in Response to Mycoparasitic Interactions

Journal Article · · Evolutionary Bioinformatics
DOI:https://doi.org/10.4137/ebo.s4198· OSTI ID:1629680
 [1];  [2];  [3];  [4];  [2];  [2]
  1. Swedish Univ. of Agricultural Sciences, Uppsala (Sweden). Dept. of Forest Mycology and Pathology; DOE/OSTI
  2. Swedish Univ. of Agricultural Sciences, Uppsala (Sweden). Dept. of Forest Mycology and Pathology
  3. Swedish Univ. of Agricultural Sciences, Uppsala (Sweden). Dept. of Molecular Biology. Biomedical Center; Lund Univ. (Sweden). MAX-lab; Univ. of Copenhagen (Denmark). Inst. of Medicinal Chemistry
  4. Swedish Univ. of Agricultural Sciences, Uppsala (Sweden). Dept. of Microbiology

Certain species of the fungal genus Trichoderma are potent mycoparasites and are used for biological control of fungal diseases on agricultural crops. In Trichoderma, whole-genome sequencing reveal between 20 and 36 different genes encoding chitinases, hydrolytic enzymes that are involved in the mycoparasitic attack. Sequences of Trichoderma chitinase genes chi18-5, chi18-13, chi18-15 and chi18-17, which all exhibit specific expression during mycoparasitism-related conditions, were determined from up to 13 different taxa and studied with regard to their evolutionary patterns. Two of them, chi18-13 and chi18-17, are members of the B1/B2 chitinase subgroup that have expanded significantly in paralog number in mycoparasitic Hypocrea atroviridis and H. virens. Chi18-13 contains two codons that evolve under positive selection and seven groups of co-evolving sites. Chi18-15 displays a unique codon-usage and contains five codons that evolve under positive selection and three groups of co-evolving sites. Regions of high amino acid variability are preferentially localized to substrate- or product side of the catalytic clefts. Differences in amino acid diversity/conservation patterns between different Trichoderma clades are observed. These observations show that Trichoderma chitinases chi18-13 and chi18-15 evolve in a manner consistent with rapid co-evolutionary interactions and identifies putative target regions involved in determining substrate-specificity

Research Organization:
Swedish University of Agricultural Sciences, Uppsala (Sweden); USDOE Joint Genome Institute (JGI), Walnut Creek, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division; Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning
OSTI ID:
1629680
Journal Information:
Evolutionary Bioinformatics, Journal Name: Evolutionary Bioinformatics Vol. 6; ISSN 1176-9343
Publisher:
SAGECopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (11)

Comparative Genomics Provide Insights into Evolution of Trichoderma Nutrition Style journal January 2014
Insights on the Evolution of Mycoparasitism from the Genome of Clonostachys rosea journal January 2015
Genome Sequence, Comparative Analysis, and Evolutionary Insights into Chitinases of Entomopathogenic Fungus Hirsutella thompsonii journal February 2015
Bacterial and fungal chitinase chiJ orthologs evolve under different selective constraints following horizontal gene transfer journal October 2012
Disruption of the Eng18B ENGase Gene in the Fungal Biocontrol Agent Trichoderma atroviride Affects Growth, Conidiation and Antagonistic Ability journal May 2012
Encapsulation of Trichoderma harzianum Preserves Enzymatic Activity and Enhances the Potential for Biological Control journal March 2020
Integrated Translatome and Proteome: Approach for Accurate Portraying of Widespread Multifunctional Aspects of Trichoderma journal August 2017
Trichoderma: the genomics of opportunistic success journal September 2011
Identifying glycoside hydrolase family 18 genes in the mycoparasitic fungal species Clonostachys rosea journal July 2015
Chitinolytic assay of indigenous Trichoderma isolates collected from different geographical locations of Chhattisgarh in Central India journal December 2012
Paleozoic diversification of terrestrial chitin-degrading bacterial lineages journal January 2019

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