Involvement of a helix-loop-helix transcription factor CHC-1 in CO2-mediated conidiation suppression in Neurospora crassa
文献类型：期刊论文
| 作者 | Sun, Xianyun1; Zhang, Hanxing1; Zhang, Zhenying1; Wang, Yong2 ; Li, Shaojie1
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| 刊名 | FUNGAL GENETICS AND BIOLOGY
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| 出版日期 | 2011-12-01 |
| 卷号 | 48期号:12页码:1077-1086 |
| 关键词 | Conidiation chc-1 fluffy Neurospora crassa |
| ISSN号 | 1087-1845 |
| DOI | 10.1016/j.fgb.2011.09.003 |
| 英文摘要 | The morphological switch from vegetative growth to conidiation in filamentous fungi is highly regulated, but the understanding of the regulatory mechanisms is limited. In this study, by screening a set of knockout mutants corresponding to 103 transcription factor encoding genes in Neurospora crassa, a mutant was found to produce abundant conidia in race tubes in which conidiation in the wild-type strain was suppressed. The corresponding gene NCU00749 encodes a protein containing a helix-loop-helix DNA binding region. Unlike enhanced conidiation in ras-1 and sod-1 mutants, which was completely suppressed by antioxidant N-acetyl cysteine, enhanced conidiation in the NCU00749 mutant was only slightly affected by N-acetyl cysteine. When grown on slants, the NCU00749 deletion mutant exhibited earlier conidial formation than the wild-type strain, and this was more evident at a higher (5%) CO2 concentration. Therefore, we named NCU00749 as conidiation at high carbon dioxide-1 (chc-1). Genes that are highly expressed during conidial development, eas, con-6, con-8 and con-10, were transcribed at a higher rate in the chc-1 deletion mutant than the wild-type strain in response to conidiation induction. To determine the mechanisms by which CHC-1 regulates conidiation, we conducted a RNA sequencing analysis and found that 404 genes exhibited >= 2 fold changes in transcription in response to chc-1 deletion. Among them, fluffy and ada-6, two transcription factor genes that positively regulate conidiation in N. crassa, and rca-1, whose homolog flbD in Aspergillus nidulans is essential for conidiation, were upregulated in the chc-1 deletion mutant. Results of RNA sequencing also suggest that signal transduction via the cAMP and the MAK-2 mediated signal pathways, and ROS generation and removal, mechanisms known to regulate conidiation, are not involved in chc-1 mediated control of conidiation. In addition, chc-1 also influences expression of genes involved in other important biological processes besides conidiation such as carbon metabolism, sphingolipid synthesis, cell wall synthesis, and calcium signaling. (C) 2011 Elsevier Inc. All rights reserved. |
| 资助项目 | National Natural Science Foundation of China[30970127] ; National Natural Science Foundation of China[31000551] ; Chinese Academy of Sciences |
| WOS研究方向 | Genetics & Heredity ; Mycology |
| 语种 | 英语 |
| WOS记录号 | WOS:000297899600001 |
| 出版者 | ACADEMIC PRESS INC ELSEVIER SCIENCE |
| 源URL | [http://ir.amss.ac.cn/handle/2S8OKBNM/12575]  |
| 专题 | 应用数学研究所 |
| 通讯作者 | Li, Shaojie |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Systemat Mycol & Lichenol, Inst Microbiol, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Acad Math & Syst Sci, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Xianyun,Zhang, Hanxing,Zhang, Zhenying,et al. Involvement of a helix-loop-helix transcription factor CHC-1 in CO2-mediated conidiation suppression in Neurospora crassa[J]. FUNGAL GENETICS AND BIOLOGY,2011,48(12):1077-1086. |
| APA | Sun, Xianyun,Zhang, Hanxing,Zhang, Zhenying,Wang, Yong,&Li, Shaojie.(2011).Involvement of a helix-loop-helix transcription factor CHC-1 in CO2-mediated conidiation suppression in Neurospora crassa.FUNGAL GENETICS AND BIOLOGY,48(12),1077-1086. |
| MLA | Sun, Xianyun,et al."Involvement of a helix-loop-helix transcription factor CHC-1 in CO2-mediated conidiation suppression in Neurospora crassa".FUNGAL GENETICS AND BIOLOGY 48.12(2011):1077-1086. |
入库方式： OAI收割
来源：数学与系统科学研究院
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