NDLI: Two different and functional nuclear rDNA genes in the abalone Haliotis tuberculata: tissue differential expression

Content Provider	Springer Nature Link
Author	Wormhoudt, Alain Gaume, Béatrice Bras, Yvan Roussel, Valérie Huchette, Sylvain
Copyright Year	2011
Abstract	Analysis of the 18S rDNA sequences of Haliotis tuberculata tuberculata and H. t. coccinea subtaxa identified two different types of 18S rDNA genes and ITS1 regions. These two different genes were also detected in H. marmorata, H. rugosa and H. diversicolor that are separated from H. tuberculata by 5–65 mya. The mean divergence value between type I and type II sequences ranged from 7.25% for 18S to 80% for ITS1. ITS1 type II is homologous with the ITS1 consensus sequences published for many abalone species, whereas ITS1 type I presented only minor homology with a unique database entry for H. iris ITS1. A phylogenetic analysis makes a clear separation between type I and type II ITS1 sequences and supports grouping H. t. tuberculata, H. t. coccinea and H. marmorata together. The two subtaxa do not show any significant differences between the homologous 18S rDNA sequences. A general structure of the ITS1 transcript was proposed, with four major helices for the two types. The two genes were expressed and, for the first time, a putative differential expression of ITS1 type I was detected in the gills, digestive gland and gonads whereas ITS1 type II was expressed in all tissues.
Starting Page	1217
Ending Page	1227
Page Count	11
File Format	PDF
ISSN	00166707
Journal	Genetica
Volume Number	139
Issue Number	10
e-ISSN	15736857
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-12-31
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Abalone Haliotis Two different rDNA genes Differential expression Plant Genetics & Genomics Human Genetics Life Sciences Animal Genetics and Genomics Microbial Genetics and Genomics
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Medicine Animal Science and Zoology Insect Science

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