Cloning and Characterization of Pectate Lyases Expressed in the Esophageal Gland of the Pine Wood Nematode Bursaphelenchus xylophilus
Autor: | Takuya Aikawa, John T. Jones, Hajime Shibuya, Taisei Kikuchi |
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Rok vydání: | 2006 |
Předmět: |
Signal peptide
Nematoda Physiology Molecular Sequence Data Bursaphelenchus xylophilus Biology Gene Expression Regulation Enzymologic Microbiology Enzyme Stability Animals Amino Acid Sequence Cloning Molecular Peptide sequence Phylogeny Polysaccharide-Lyases chemistry.chemical_classification Genetic transfer General Medicine biology.organism_classification Amino acid Gastrointestinal Tract Nematode Biochemistry chemistry Pectate lyase Agronomy and Crop Science Carbon-Oxygen Lyases |
Zdroj: | Molecular Plant-Microbe Interactions®. 19:280-287 |
ISSN: | 1943-7706 0894-0282 |
Popis: | Two pectate lyase genes (Bx-pel-1 and Bx-pel-2) were cloned from the pine wood nematode, Bursaphelenchus xy-lophilus. The deduced amino acid sequences of these pectate lyases are most similar to polysaccharide lyase family 3 proteins. Recombinant BxPEL1 showed highest activity on polygalacturonic acid and lower activity on more highly methylated pectin. Recombinant BxPEL1 demonstrated full dependency on Ca2+ for activity and optimal activity at 55°C and pH 8 to 10 like other pectate lyases of polysaccharide lyase family 3. The protein sequences have predicted signal peptides at their N-termini and the genes are expressed solely in the esophageal gland cells of the nematode, indicating that the pectate lyases could be secreted into plant tissues to help feeding and migration in the tree. This study suggests that pectate lyases are widely distributed in plant-parasitic nematodes and play an important role in plant-nematode interactions. |
Databáze: | OpenAIRE |
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