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四种锈菌中高度保守的5S核糖体RNA序列以及胡桃微座孢中不典型的5S rRNA二级结构。

Highly conserved 5S ribosomal RNA sequences in four rust fungi and atypical 5S rRNA secondary structure in Microstroma juglandis.

作者信息

Gottschalk M, Blanz P A

出版信息

Nucleic Acids Res. 1984 May 11;12(9):3951-8. doi: 10.1093/nar/12.9.3951.

DOI:10.1093/nar/12.9.3951
PMID:6728684
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC318802/
Abstract

The 5S ribosomal RNA nucleotide sequences of five basidiomycetous fungi, Coleosporium tussilaginis , Gymnosporangium clavariaeforme , Puccinia poarum , Endophyllum sempervivi and Microstroma juglandis were determined. Despite high differentiation in their host spectra the four rust species are highly conserved with respect to their 5S rRna sequences, which fit with the basidiomycete cluster 5 described by Walker and Doolittle (1). The sequences obtained from the first three rust fungi were proven to be identical while the sequence from Endophyllum sempervivi showed two base substitutions compared with the other rust fungi. The Microstroma juglandis 5S rRNA sequence differs from all other basidiomycete 5S rRNA sequences published so far in respect to its secondary structure which shows an atypical 'CCA' loop in helix D, but it reveals typical basidiomycetous signature nucleotides. Therefore Microstroma juglandis represents a cluster of its own within the Basidiomycetes. A dendrogram was constructed based on Kimura's "Neutral Theory of Molecular Evolution".

摘要

测定了五种担子菌真菌，即款冬鞘锈菌、柱状锈菌、早熟禾柄锈菌、长生草内生锈菌和胡桃小座孢菌的5S核糖体RNA核苷酸序列。尽管这四种锈菌在寄主谱上有很大差异，但它们的5S rRNA序列高度保守，这与Walker和Doolittle（1）描述的担子菌簇5相符。从前三种锈菌获得的序列被证明是相同的，而长生草内生锈菌的序列与其他锈菌相比有两个碱基替换。胡桃小座孢菌的5S rRNA序列在二级结构方面不同于迄今为止公布的所有其他担子菌5S rRNA序列，其在螺旋D中显示出一个非典型的“CCA”环，但它揭示了典型的担子菌特征核苷酸。因此，胡桃小座孢菌在担子菌中代表了一个独立的簇。基于木村的“分子进化中性理论”构建了一个系统树。

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