Nucleotide differences in the mbf1 gene of the lichenized fungus Umbilicaria decussata collected in polar and non-polar regions

WANG Yanyan; LIU Rundong; WANG Weicheng; WEI Xinli; WEI Jiangchun

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Nucleotide differences in the mbf1 gene of the lichenized fungus Umbilicaria decussata collected in polar and non-polar regions

机译：极性和非极性区域收集的地衣真菌脐带菌mbf1基因的核苷酸差异

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Multiprotein bridging factor 1 (MBF1) is a transcriptional co-activator related to stress tolerance in various organisms. We investigated the nucleotide differences in the mbf1 gene in the lichen-forming fungus Umbilicaria decussata collected from polar (i.e., Antarctica and the Arctic) and non-polar (i.e., Armenia) regions. The 552-bp Udmbf1 genes isolated from eight samples contained numerous sequence variations, including single nucleotide polymorphisms as well as insertions and deletions. The frequency of nucleotide changes was higher in the intron than in the coding sequence. The nucleotide polymorphism levels (π=0.01792, θ=0.01792) and haplotype diversity (Hd=1) in the Udmbf1 gene from Antarctic samples were relatively high. Additionally, of the 19 detected nucleotide sequence variation sites, 15 were observed only in Antarctic samples. The resulting amino acid changes occurred in the N-terminal, whose function remains unknown. Although these DNA polymorphisms and amino acid changes have been verified in Antarctic samples of U. decussata, there is still little evidence indicating that different environmental conditions affected the functional evolution of Udmbf1. Additional studies involving more U. decussata samples from representative ecotypes will be necessary to uncover the relationships among DNA polymorphisms, functional gene evolution, and lichen habitats.

机译：多蛋白桥联因子1（MBF1）是一种转录共激活因子，与多种生物体的胁迫耐受性有关。我们调查了从极性（即南极和北极）和非极性（即亚美尼亚）地区收集的地衣形成真菌Umbilicaria decussata中mbf1基因的核苷酸差异。从八个样本中分离出的552 bp Udmbf1基因包含许多序列变异，包括单核苷酸多态性以及插入和缺失。内含子中核苷酸改变的频率高于编码序列中的核苷酸。来自南极样品的Udmbf1基因的核苷酸多态性水平（π= 0.01792，θ= 0.01792）和单倍型多样性（Hd = 1）相对较高。此外，在检测到的19个核苷酸序列变异位点中，仅在南极样品中观察到15个。产生的氨基酸变化发生在N末端，其功能仍然未知。虽然这些DNA多态性和氨基酸变化已在U. decussata的南极样品中得到验证，但仍然很少有证据表明不同的环境条件会影响Udmbf1的功能进化。为了揭示DNA多态性，功能基因进化和地衣生境之间的关系，有必要进行更多的研究，这些研究涉及来自代表性生态型的更多U. decussata样品。

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《极地科学进展(英文版)》 |2017年第1期|43-49|共7页
作者
WANG Yanyan; LIU Rundong; WANG Weicheng; WEI Xinli; WEI Jiangchun;
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State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China;

State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China;

University of Chinese Academy of Sciences, Beijing 100049, China;

State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China;

University of Chinese Academy of Sciences, Beijing 100049, China;

State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China;

State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China;

University of Chinese Academy of Sciences, Beijing 100049, China;

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Nucleotide differences in the mbf1 gene of the lichenized fungus Umbilicaria decussata collected in polar and non-polar regions

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