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纤细裸藻中的染色体外环状核rDNA。

Extrachromosomal circular nuclear rDNA in Euglena gracilis.

作者信息

Ravel-Chapuis P, Nicolas P, Nigon V, Neyret O, Freyssinet G

出版信息

Nucleic Acids Res. 1985 Oct 25;13(20):7529-37. doi: 10.1093/nar/13.20.7529.

DOI:10.1093/nar/13.20.7529
PMID:3932973
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC322060/
Abstract

The presence of extrachromosomal nuclear ribosomal DNA (rDNA) in the unicellular alga Euglena gracilis has been established. This rDNA is circular. Each circle is 3.8 micron long and contains one rDNA unit. Oligomers are rare. Extrachromosomal rDNA is present in large amounts during the exponential phase of growth and appears less abundant during the stationary phase. It was found in all wild-type and mutant strains of Euglena examined. Our estimations suggest that rDNA in Euglena is mainly extrachromosomal. Research of extrachromosomal rDNA in spinach and Petunia was negative.

摘要

单细胞藻类纤细裸藻中存在染色体外核核糖体DNA（rDNA）已得到证实。这种rDNA是环状的。每个环长3.8微米，包含一个rDNA单元。寡聚体很少见。染色体外rDNA在生长指数期大量存在，而在稳定期似乎含量较少。在所检测的所有裸藻野生型和突变株中都发现了它。我们的估计表明，裸藻中的rDNA主要存在于染色体外。对菠菜和矮牵牛中染色体外rDNA的研究结果为阴性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e08f/322060/1453a28326c8/nar00314-0364-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e08f/322060/914bbba84273/nar00314-0360-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e08f/322060/eeeca03833e8/nar00314-0363-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e08f/322060/1453a28326c8/nar00314-0364-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e08f/322060/914bbba84273/nar00314-0360-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e08f/322060/eeeca03833e8/nar00314-0363-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e08f/322060/1453a28326c8/nar00314-0364-a.jpg

相似文献

1
Extrachromosomal circular nuclear rDNA in Euglena gracilis.纤细裸藻中的染色体外环状核rDNA。
Nucleic Acids Res. 1985 Oct 25;13(20):7529-37. doi: 10.1093/nar/13.20.7529.
2
Nuclear rDNA in Euglena gracilis: paucity of chromosomal units and replication of extrachromosomal units.纤细裸藻中的核核糖体DNA：染色体单元数量稀少及染色体外单元的复制
Nucleic Acids Res. 1988 Jun 10;16(11):4801-10. doi: 10.1093/nar/16.11.4801.
3
Analysis of intergenic spacer transcripts suggests 'read-around' transcription of the extrachromosomal circular rDNA in Euglena gracilis.基因间间隔转录本分析表明纤细裸藻中染色体外环状rDNA存在“通读”转录。
Nucleic Acids Res. 2001 May 15;29(10):2191-8. doi: 10.1093/nar/29.10.2191.
4
Physical mapping of the Euglena gracilis chloroplast DNA and ribosomal RNA gene region.纤细裸藻叶绿体DNA和核糖体RNA基因区域的物理图谱
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5
Fourteen internal transcribed spacers in the circular ribosomal DNA of Euglena gracilis.纤细裸藻环形核糖体DNA中的14个内转录间隔区。
J Mol Biol. 1990 Sep 5;215(1):85-91. doi: 10.1016/S0022-2836(05)80097-X.
6
Sequencing of 16S--23S spacer in a ribosomal RNA operon of Euglena gracilis chloroplast DNA reveals two tRNA genes.纤细裸藻叶绿体DNA核糖体RNA操纵子中16S - 23S间隔区的测序揭示了两个tRNA基因。
Nature. 1980 Aug 28;286(5776):908-10. doi: 10.1038/286908a0.
7
Circular extrachromosomal DNA in Euglena gracilis under normal and stress conditions.正常和应激条件下眼虫 Euglena gracilis 中的环状染色体外 DNA。
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Transfer RNA genes associated with the 16S and 23S rRNA genes of Euglena chloroplast DNA.与眼虫叶绿体DNA的16S和23S rRNA基因相关的转运RNA基因。
Biochem Biophys Res Commun. 1980 Jul 16;95(1):47-54. doi: 10.1016/0006-291x(80)90702-0.
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Characterization of the nuclear ribosomal DNA of Euglena gracilis.纤细裸藻核糖体DNA的特征分析
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10
Organization and nucleotide sequence of ribosomal RNA genes on a circular 73 kbp DNA from the colourless flagellate Astasia longa.无色鞭毛虫长眼虫环状73千碱基对DNA上核糖体RNA基因的组织与核苷酸序列
Curr Genet. 1990 May;17(5):433-8. doi: 10.1007/BF00334524.

引用本文的文献

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Episomal and chromosomal DNA replication and recombination in .游离型和染色体DNA在……中的复制与重组
Front Mol Biosci. 2023 Jun 8;10:1212082. doi: 10.3389/fmolb.2023.1212082. eCollection 2023.
2
Cryo-EM structure of the highly atypical cytoplasmic ribosome of Euglena gracilis.秀丽隐杆藻细胞质核糖体的高异常性的 cryo-EM 结构。
Nucleic Acids Res. 2020 Nov 18;48(20):11750-11761. doi: 10.1093/nar/gkaa893.
3
U3 snoRNA genes are multi-copy and frequently linked to U5 snRNA genes in Euglena gracilis.U3 snoRNA 基因是多拷贝的，并且在眼虫(Euglena gracilis)中经常与 U5 snRNA 基因相连。

本文引用的文献

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Gene. 1981 Nov;15(2-3):237-47. doi: 10.1016/0378-1119(81)90133-5.
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