Identification of an essential regulator controlling the production of raw-starch-digesting glucoamylase in Penicillium oxalicum
Abstract Background Raw-starch-digesting glucoamylases (RSDGs) from filamentous fungi have great commercial values in starch processing; however, the regulatory mechanisms associated with their production in filamentous fungi remain unknown. Penicillium oxalicum HP7-1 isolated by our laboratory secr...
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Format: | Article |
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BMC
2019-01-01
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Series: | Biotechnology for Biofuels |
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Online Access: | http://link.springer.com/article/10.1186/s13068-018-1345-z |
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Article |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mei-Yuan Zhang Shuai Zhao Yuan-Ni Ning Li-Hao Fu Cheng-Xi Li Qi Wang Ran You Chen-Ying Wang Han-Nan Xu Xue-Mei Luo Jia-Xun Feng |
spellingShingle |
Mei-Yuan Zhang Shuai Zhao Yuan-Ni Ning Li-Hao Fu Cheng-Xi Li Qi Wang Ran You Chen-Ying Wang Han-Nan Xu Xue-Mei Luo Jia-Xun Feng Identification of an essential regulator controlling the production of raw-starch-digesting glucoamylase in Penicillium oxalicum Biotechnology for Biofuels Transcription regulation Penicillium oxalicum Raw-starch-digesting glucoamylase Amylase |
author_facet |
Mei-Yuan Zhang Shuai Zhao Yuan-Ni Ning Li-Hao Fu Cheng-Xi Li Qi Wang Ran You Chen-Ying Wang Han-Nan Xu Xue-Mei Luo Jia-Xun Feng |
author_sort |
Mei-Yuan Zhang |
title |
Identification of an essential regulator controlling the production of raw-starch-digesting glucoamylase in Penicillium oxalicum |
title_short |
Identification of an essential regulator controlling the production of raw-starch-digesting glucoamylase in Penicillium oxalicum |
title_full |
Identification of an essential regulator controlling the production of raw-starch-digesting glucoamylase in Penicillium oxalicum |
title_fullStr |
Identification of an essential regulator controlling the production of raw-starch-digesting glucoamylase in Penicillium oxalicum |
title_full_unstemmed |
Identification of an essential regulator controlling the production of raw-starch-digesting glucoamylase in Penicillium oxalicum |
title_sort |
identification of an essential regulator controlling the production of raw-starch-digesting glucoamylase in penicillium oxalicum |
publisher |
BMC |
series |
Biotechnology for Biofuels |
issn |
1754-6834 |
publishDate |
2019-01-01 |
description |
Abstract Background Raw-starch-digesting glucoamylases (RSDGs) from filamentous fungi have great commercial values in starch processing; however, the regulatory mechanisms associated with their production in filamentous fungi remain unknown. Penicillium oxalicum HP7-1 isolated by our laboratory secretes RSDG with suitable properties but at low production levels. Here, we screened and identified novel regulators of RSDG gene expression in P. oxalicum through transcriptional profiling and genetic analyses. Results Penicillium oxalicum HP7-1 transcriptomes in the presence of glucose and starch, respectively, used as the sole carbon source were comparatively analyzed, resulting in screening of 23 candidate genes regulating the expression of RSDG genes. Following deletion of 15 of the candidate genes in the parental P. oxalicum strain ∆PoxKu70, enzymatic assays revealed five mutants exhibiting significant reduction in the production of raw-starch-digesting enzymes (RSDEs). The deleted genes (POX01907, POX03446, POX06509, POX07078, and POX09752), were the first report to regulate RSDE production of P. oxalicum. Further analysis revealed that ∆POX01907 lost the most RSDE production (83.4%), and that POX01907 regulated the expression of major amylase genes, including the RSDG gene POX01356/PoxGA15A, a glucoamylase gene POX02412, and the α-amylase gene POX09352/Amy13A, during the late-stage growth of P. oxalicum. Conclusion Our results revealed a novel essential regulatory gene POX01907 encoding a transcription factor in controlling the production of RSDE, regulating the expression of an important RSDG gene POX01356/PoxGA15A, in P. oxalicum. These results provide insight into the regulatory mechanism of fungal amylolytic enzyme production. |
topic |
Transcription regulation Penicillium oxalicum Raw-starch-digesting glucoamylase Amylase |
url |
http://link.springer.com/article/10.1186/s13068-018-1345-z |
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doaj-20d12224bc4f404c9c971118fe82d3a82020-11-25T02:14:01ZengBMCBiotechnology for Biofuels1754-68342019-01-0112111310.1186/s13068-018-1345-zIdentification of an essential regulator controlling the production of raw-starch-digesting glucoamylase in Penicillium oxalicumMei-Yuan Zhang0Shuai Zhao1Yuan-Ni Ning2Li-Hao Fu3Cheng-Xi Li4Qi Wang5Ran You6Chen-Ying Wang7Han-Nan Xu8Xue-Mei Luo9Jia-Xun Feng10State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi UniversityState Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi UniversityState Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi UniversityState Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi UniversityState Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi UniversityState Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi UniversityState Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi UniversityState Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi UniversityState Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi UniversityState Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi UniversityState Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi Research Center for Microbial and Enzyme Engineering Technology, College of Life Science and Technology, Guangxi UniversityAbstract Background Raw-starch-digesting glucoamylases (RSDGs) from filamentous fungi have great commercial values in starch processing; however, the regulatory mechanisms associated with their production in filamentous fungi remain unknown. Penicillium oxalicum HP7-1 isolated by our laboratory secretes RSDG with suitable properties but at low production levels. Here, we screened and identified novel regulators of RSDG gene expression in P. oxalicum through transcriptional profiling and genetic analyses. Results Penicillium oxalicum HP7-1 transcriptomes in the presence of glucose and starch, respectively, used as the sole carbon source were comparatively analyzed, resulting in screening of 23 candidate genes regulating the expression of RSDG genes. Following deletion of 15 of the candidate genes in the parental P. oxalicum strain ∆PoxKu70, enzymatic assays revealed five mutants exhibiting significant reduction in the production of raw-starch-digesting enzymes (RSDEs). The deleted genes (POX01907, POX03446, POX06509, POX07078, and POX09752), were the first report to regulate RSDE production of P. oxalicum. Further analysis revealed that ∆POX01907 lost the most RSDE production (83.4%), and that POX01907 regulated the expression of major amylase genes, including the RSDG gene POX01356/PoxGA15A, a glucoamylase gene POX02412, and the α-amylase gene POX09352/Amy13A, during the late-stage growth of P. oxalicum. Conclusion Our results revealed a novel essential regulatory gene POX01907 encoding a transcription factor in controlling the production of RSDE, regulating the expression of an important RSDG gene POX01356/PoxGA15A, in P. oxalicum. These results provide insight into the regulatory mechanism of fungal amylolytic enzyme production.http://link.springer.com/article/10.1186/s13068-018-1345-zTranscription regulationPenicillium oxalicumRaw-starch-digesting glucoamylaseAmylase |