Overexpression of an acidic endo-β-1,3-1,4-glucanase in transgenic maize seed for direct utilization in animal feed.
| Autor: | Yuhong Zhang, Xiaolu Xu, Xiaojin Zhou, Rumei Chen, Peilong Yang, Qingchang Meng, Kun Meng, Huiying Luo, Jianhua Yuan, Bin Yao, Wei Zhang |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | PLoS ONE, Vol 8, Iss 12, p e81993 (2013) |
| Druh dokumentu: | article |
| ISSN: | 1932-6203 94539006 |
| DOI: | 10.1371/journal.pone.0081993 |
| Popis: | BackgroundIncorporation of exogenous glucanase into animal feed is common practice to remove glucan, one of the anti-nutritional factors, for efficient nutrition absorption. The acidic endo-β-1,3-1,4-glucanase (Bgl7A) from Bispora sp. MEY-1 has excellent properties and represents a potential enzyme supplement to animal feed.Methodology/principal findingsHere we successfully developed a transgenic maize producing a high level of Bgl7AM (codon modified Bgl7A) by constructing a recombinant vector driven by the embryo-specific promoter ZM-leg1A. Southern and Western blot analysis indicated the stable integration and specific expression of the transgene in maize seeds over four generations. The β-glucanase activity of the transgenic maize seeds reached up to 779,800 U/kg, about 236-fold higher than that of non-transgenic maize. The β-glucanase derived from the transgenic maize seeds had an optimal pH of 4.0 and was stable at pH 1.0-8.0, which is in agreement with the normal environment of digestive tract.Conclusion/significanceOur study offers a transgenic maize line that could be directly used in animal feed without any glucanase production, purification and supplementation, consequently simplifying the feed enzyme processing procedure. |
| Databáze: | Directory of Open Access Journals |
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