NDLI: DIRS and Ngaro Retrotransposons in Fungi

Content Provider	PubMed Central
Author	Anna, Muszewska Kamil, Steczkiewicz Ginalski, Krzysztof
Editor	Corradi, Nicolas
Copyright Year	2013
Abstract	Retrotransposons with a tyrosine recombinase (YR) have been discovered recently and lack thorough annotation in fungi. YR retrotransposons are divided into 3 groups: DIRS, Ngaro and VIPER (known only from kinetoplastida). We used comparative genomics to investigate the evolutionary patterns of retrotransposons in the fungal kingdom. The identification of both functional and remnant elements provides a unique view on both recent and past transposition activity. Our searches covering a wide range of fungal genomes allowed us to identify 2241 YR retrotransposons. Based on CLANS clustering of concatenated sequences of the reverse transcriptase (RT), RNase H (RH), DNA N-6-adenine-methyltransferase (MT) and YR protein domains we propose a revised classification of YR elements expanded by two new categories of Ngaro elements. A phylogenetic analysis of 477 representatives supports this observation and additionally demonstrates that DIRS and Ngaro abundance changed independently in Basidiomycota and Blastocladiomycota/Mucoromycotina/Kixellomycotina. Interestingly, a single remnant Ngaro element could be identified in an Ascomycota genome. Our analysis revealed also that 3 Pucciniomycotina taxa, known for their overall mobile element abundance and big genome size, encode an elevated number of Ngaro retrotransposons. Considering the presence of DIRS elements in all analyzed Mucoromycotina, Kickxellomycotina and Blastocladiomycota genomes one might assume a common origin of fungal DIRS retrotransposons with a loss in Dicarya. Ngaro elements described to date from Opisthokonta, seem to have invaded the common ancestor of Agaricomycotina and Pucciniomycotina after Ustilagomycotina divergence. Yet, most of analyzed genomes are devoid of YR elements and most identified retrotransposons are incomplete.
Related Links	http://dx.doi.org/10.1371/journal.pone.0076319
Starting Page	76319
File Format	PDF
ISSN	19326203
e-ISSN	19326203
Journal	PLoS ONE
Issue Number	9
Volume Number	8
Language	English
Publisher	Public Library of Science
Publisher Date	2013-09-01
Access Restriction	Open
Rights Holder	Public Library of Science
Subject Keyword	Biochemistry, Genetics and Molecular Biology(all) Agricultural and Biological Sciences(all) Medicine(all) Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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