Home

Unusual compact rDNA gene arrangements within some members of the Ascomycota: evidence for molecular co-evolution between ITS1 and ITS2

Show simple item record

dc.contributor.author Hausner, G
dc.contributor.author Wang, X
dc.date.accessioned 2007-09-07T17:50:12Z
dc.date.available 2007-09-07T17:50:12Z
dc.date.issued 2005-08-06T17:50:12Z
dc.identifier.citation 0831-2796; GENOME, AUG 2005, vol. 48, no. 4, p.648 to 660 en
dc.identifier.uri http://hdl.handle.net/1993/2779
dc.description.abstract The internal transcribed spacers of the ribosomal DNA tandem repeat were examined in members of the ascomycetous genus Sphaeronaemella. Species of Sphaeronaemella and its mitotic counterpart Gabarnaudia, have a compact rDNA gene arrangement due to unusually short internal transcribed spacer (ITS) regions. Examination of these regions from phylogenetically related taxa, Cornuvesica, Gondwanamyces, and Ceratocystis, showed that their ITS1 and ITS2 regions could be folded into central hairpin-like structures with the size reduction in species of Sphaeronaemella being due to length reduction of the main-hairpin and the loss of smaller hairpin-like structures that emanate from the main hairpin. A databank compilation, combined with newly obtained sequences, provided an ITS data set that includes sequences of 600 species belonging to the Ascomycota. Correlation analysis revealed that the sizes of ITS1 and ITS2 show a strong positive correlation, suggesting that the 2 rDNA regions have co-evolved. This supports biochemical evidence indicating that the ITS1 and ITS2 segments interact to facilitate the maturation of the rRNA precursor. en
dc.format.extent 1538841 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.rights No part of the NRC Research Press electronic journals may be reproduced, stored, or transmitted in any form or by any means, without the written permission of the publisher, except as stated below. Under the Canadian Copyright Act, individuals may download or print single copies of articles for personal research or study. Any person may reproduce short excerpts from articles in the journals for any purpose that respects the moral rights of authors, provided that the source is fully acknowledged. As a courtesy, the consent of authors of such material should be obtained directly from the author. Authorization to reproduce items for other than personal research or study, as stated above, may be obtained via Access © upon payment of the copyright fee of $10.00 per copy. NRC Research Press also extends certain additional rights to authors. The above rights do not extend to copying or reproduction for general distribution, for advertising or promotional purposes, for creating new collective works, or for resale. For such copying or reproduction, arrangements must be made with NRC Research Press. en
dc.subject rDNA en
dc.subject ITS1 and ITS2 en
dc.subject Ascomycota en
dc.subject co-evolution en
dc.subject INTERNAL TRANSCRIBED SPACER en
dc.subject PRE-RIBOSOMAL-RNA en
dc.subject SCHIZOSACCHAROMYCES-POMBE en
dc.subject SPHAERONAEMELLA-FIMICOLA en
dc.subject SACCHAROMYCES-CEREVISIAE en
dc.subject CONCERTED EVOLUTION en
dc.subject SECONDARY STRUCTURE en
dc.subject FUNCTIONAL-ANALYSIS en
dc.subject DNA en
dc.subject SEQUENCE en
dc.title Unusual compact rDNA gene arrangements within some members of the Ascomycota: evidence for molecular co-evolution between ITS1 and ITS2 en
dc.status Peer reviewed en
dc.identifier.doi http://dx.doi.org/10.1139/g05-037


Files in this item

This item appears in the following Collection(s)

Show simple item record

View Statistics