A new chitinase-like xylanase inhibitor protein (XIP) from coffee (Coffea arabica) affects Soybean Asian rust (Phakopsora pachyrhizi) spore germination
| Autor: | Osmundo B. Oliveira-Neto, C. D. S. Seixas, Daniel R. G. Price, Celso G Santana, Edivaldo Ximenes Ferreira Filho, John A. Gatehouse, Elaine Fitches, Maria Fatima Grossi-de-Sa, Angela Mehta, Cláudia Vieira Godoy, Leonora Rios de Souza Moreira, Érico A. R. Vasconcelos, Marilia Santos Silva |
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| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
lcsh:Biotechnology
Molecular Sequence Data Rust (fungus) Germination Ferrugem asiática - soja Coffee Pichia pastoris Microbiology lcsh:TP248.13-248.65 Botany Spore germination Amino Acid Sequence Cloning Molecular Glycoside hydrolase family 18 Plant Proteins Soja - doenças e pragas biology Coffea arabica Basidiomycota Chitinases food and beverages Molecular Sequence Annotation Spores Fungal biology.organism_classification Xylosidases Phakopsora pachyrhizi Chitinase Proteínas Xylanase biology.protein Electrophoresis Polyacrylamide Gel Soybeans Sequence Alignment Biotechnology Research Article |
| Zdroj: | BMC Biotechnology Repositório Institucional da UnB Universidade de Brasília (UnB) instacron:UNB BMC Biotechnology, Vol 11, Iss 1, p 14 (2011) BMC biotechnology, 2011, Vol.11, pp.14 [Peer Reviewed Journal] |
| ISSN: | 1472-6750 |
| Popis: | Background Asian rust (Phakopsora pachyrhizi) is a common disease in Brazilian soybean fields and it is difficult to control. To identify a biochemical candidate with potential to combat this disease, a new chitinase-like xylanase inhibitor protein (XIP) from coffee (Coffea arabica) (CaclXIP) leaves was cloned into the pGAPZα-B vector for expression in Pichia pastoris. Results A cDNA encoding a chitinase-like xylanase inhibitor protein (XIP) from coffee (Coffea arabica) (CaclXIP), was isolated from leaves. The amino acid sequence predicts a (β/α)8 topology common to Class III Chitinases (glycoside hydrolase family 18 proteins; GH18), and shares similarity with other GH18 members, although it lacks the glutamic acid residue essential for catalysis, which is replaced by glutamine. CaclXIP was expressed as a recombinant protein in Pichia pastoris. Enzymatic assay showed that purified recombinant CaclXIP had only residual chitinolytic activity. However, it inhibited xylanases from Acrophialophora nainiana by approx. 60% when present at 12:1 (w/w) enzyme:inhibitor ratio. Additionally, CaclXIP at 1.5 μg/μL inhibited the germination of spores of Phakopsora pachyrhizi by 45%. Conclusions Our data suggests that CaclXIP belongs to a class of naturally inactive chitinases that have evolved to act in plant cell defence as xylanase inhibitors. Its role on inhibiting germination of fungal spores makes it an eligible candidate gene for the control of Asian rust. |
| Databáze: | OpenAIRE |
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