The chitinase C gene PsChiC from Pseudomonas sp. and its synergistic effects on larvicidal activity
Pseudomonas sp. strain TXG6-1, a chitinolytic gram-negative bacterium, was isolated from a vegetable field in Taixing city, Jiangsu Province, China. In this study, a Pseudomonas chitinase C gene (PsChiC) was isolated from the chromosomal DNA of this bacterium using a pair of specific primers. The Ps...
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Sociedade Brasileira de Genética
2015-09-01
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| Series: | Genetics and Molecular Biology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000300366&lng=en&tlng=en |
| _version_ | 1828229722900791296 |
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| author | Wanfang Zhong Shaojun Ding Huifang Guo |
| author_facet | Wanfang Zhong Shaojun Ding Huifang Guo |
| author_sort | Wanfang Zhong |
| collection | DOAJ |
| description | Pseudomonas sp. strain TXG6-1, a chitinolytic gram-negative bacterium, was isolated from a vegetable field in Taixing city, Jiangsu Province, China. In this study, a Pseudomonas chitinase C gene (PsChiC) was isolated from the chromosomal DNA of this bacterium using a pair of specific primers. The PsChiC gene consisted of an open reading frame of 1443 nucleotides and encoded 480 amino acid residues with a calculated molecular mass of 51.66 kDa. The deduced PsChiC amino acid sequence lacked a signal sequence and consisted of a glycoside hydrolase family 18 catalytic domain responsible for chitinase activity, a fibronectin type III-like domain (FLD) and a C-terminal chitin-binding domain (ChBD). The amino acid sequence of PsChiCshowed high sequence homology (> 95%) with chitinase C from Serratia marcescens. SDS-PAGE showed that the molecular mass of chitinase PsChiC was 52 kDa. Chitinase assays revealed that the chitobiosidase and endochitinase activities of PsChiCwere 51.6- and 84.1-fold higher than those of pET30a, respectively. Although PsChiC showed little insecticidal activity towards Spodoptera litura larvae, an insecticidal assay indicated that PsChiC increased the insecticidal toxicity of SpltNPV by 1.78-fold at 192 h and hastened death. These results suggest that PsChiC from Pseudomonas sp. could be useful in improving the pathogenicity of baculoviruses. |
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| institution | Directory Open Access Journal |
| issn | 1678-4685 |
| language | English |
| last_indexed | 2024-04-12T18:37:26Z |
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| spelling | doaj.art-13b43f06e1864f8997fb009d7d0932902022-12-22T03:20:53ZengSociedade Brasileira de GenéticaGenetics and Molecular Biology1678-46852015-09-0138336637210.1590/S1415-475738320140320S1415-47572015000300366The chitinase C gene PsChiC from Pseudomonas sp. and its synergistic effects on larvicidal activityWanfang ZhongShaojun DingHuifang GuoPseudomonas sp. strain TXG6-1, a chitinolytic gram-negative bacterium, was isolated from a vegetable field in Taixing city, Jiangsu Province, China. In this study, a Pseudomonas chitinase C gene (PsChiC) was isolated from the chromosomal DNA of this bacterium using a pair of specific primers. The PsChiC gene consisted of an open reading frame of 1443 nucleotides and encoded 480 amino acid residues with a calculated molecular mass of 51.66 kDa. The deduced PsChiC amino acid sequence lacked a signal sequence and consisted of a glycoside hydrolase family 18 catalytic domain responsible for chitinase activity, a fibronectin type III-like domain (FLD) and a C-terminal chitin-binding domain (ChBD). The amino acid sequence of PsChiCshowed high sequence homology (> 95%) with chitinase C from Serratia marcescens. SDS-PAGE showed that the molecular mass of chitinase PsChiC was 52 kDa. Chitinase assays revealed that the chitobiosidase and endochitinase activities of PsChiCwere 51.6- and 84.1-fold higher than those of pET30a, respectively. Although PsChiC showed little insecticidal activity towards Spodoptera litura larvae, an insecticidal assay indicated that PsChiC increased the insecticidal toxicity of SpltNPV by 1.78-fold at 192 h and hastened death. These results suggest that PsChiC from Pseudomonas sp. could be useful in improving the pathogenicity of baculoviruses.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000300366&lng=en&tlng=encatalytic domainchitin-binding domainfibronectin type-like domaingene cloninginsecticidal activity |
| spellingShingle | Wanfang Zhong Shaojun Ding Huifang Guo The chitinase C gene PsChiC from Pseudomonas sp. and its synergistic effects on larvicidal activity Genetics and Molecular Biology catalytic domain chitin-binding domain fibronectin type-like domain gene cloning insecticidal activity |
| title | The chitinase C gene PsChiC from Pseudomonas sp. and its synergistic effects on larvicidal activity |
| title_full | The chitinase C gene PsChiC from Pseudomonas sp. and its synergistic effects on larvicidal activity |
| title_fullStr | The chitinase C gene PsChiC from Pseudomonas sp. and its synergistic effects on larvicidal activity |
| title_full_unstemmed | The chitinase C gene PsChiC from Pseudomonas sp. and its synergistic effects on larvicidal activity |
| title_short | The chitinase C gene PsChiC from Pseudomonas sp. and its synergistic effects on larvicidal activity |
| title_sort | chitinase c gene pschic from pseudomonas sp and its synergistic effects on larvicidal activity |
| topic | catalytic domain chitin-binding domain fibronectin type-like domain gene cloning insecticidal activity |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000300366&lng=en&tlng=en |
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