EsturgeonV1, PubMed, Checkpoint, bibRecord, 000673

Rainbow trout mitochondrial DNA: sequence and structural characteristics of the non-coding control region and flanking tRNA genes.

Identifieur interne : 000673 ( PubMed/Checkpoint ); précédent : 000672; suivant : 000674

Rainbow trout mitochondrial DNA: sequence and structural characteristics of the non-coding control region and flanking tRNA genes.

Auteurs : T J Digby [Canada] ; M W Gray ; C B Lazier

Source :

Gene [ 0378-1119 ] ; 1992.

RBID : pubmed:1511893

English descriptors

KwdEn :
- Animals, Base Sequence, DNA, Mitochondrial (genetics), Molecular Sequence Data, Nucleic Acid Conformation, RNA, Transfer (genetics), Regulatory Sequences, Nucleic Acid (genetics), Repetitive Sequences, Nucleic Acid (genetics), Sequence Alignment, Trout (genetics).
MESH :
- chemical , genetics : DNA, Mitochondrial, RNA, Transfer.
- genetics : Regulatory Sequences, Nucleic Acid, Repetitive Sequences, Nucleic Acid, Trout.
- Animals, Base Sequence, Molecular Sequence Data, Nucleic Acid Conformation, Sequence Alignment.

Abstract

We have determined the sequence of the 1003-bp control region (also referred to as the 'displacement-loop region') and flanking tRNA genes in the mitochondrial DNA (mtDNA) of the rainbow trout, Oncorhynchus mykiss. This region has the same overall structure (i.e., trnT-trnP-control region-trnF) as in mammalian and amphibian (Xenopus laevis) mitochondrial (mt)DNAs. The trout control region contains apparent homologues of the conserved sequence blocks (CSB) and termination-associated sequences identified in all other vertebrate mtDNA control regions; however, it is distinguished by having an imperfect direct repeat (68/73 bp; 77% positional identity) in the right domain (proximal to the phenylalanine tRNA gene), downstream from CSB-3 in the direction of heavy-strand transcription. Within the control region, rainbow trout mtDNA shares considerable sequence similarity with the mtDNAs of Atlantic cod, Gadus morhua (Johansen et al., Nucleic Acids Res. 18 (1990) 411-419] and white sturgeon, Acipenser transmontanus (Buroker et al., Genetics 124 (1990) 157-163). The highest level of identity in pairwise comparisons is 60-70% over about 80 bp in the right domain (encompassing CSB-2 and CSB-3). About 270 bp comprising the central domain of the control region (encompassing a polypyrimidine tract) are more moderately conserved (55-60% identity in pairwise comparisons), while the left domain is highly divergent. Comparison of five trout mitochondrial tRNA sequences with their human and X. laevis homologues emphasizes the strong A+T substitution bias shown by the human sequences.

PubMed: 1511893

Affiliations:

Canada

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Le document en format XML

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<author><name sortKey="Digby, T J" sort="Digby, T J" uniqKey="Digby T" first="T J" last="Digby">T J Digby</name>
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<wicri:regionArea>Department of Biochemistry, Dalhousie University, Halifax, Nova Scotia</wicri:regionArea>
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<author><name sortKey="Gray, M W" sort="Gray, M W" uniqKey="Gray M" first="M W" last="Gray">M W Gray</name>
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<term>Molecular Sequence Data</term>
<term>Nucleic Acid Conformation</term>
<term>RNA, Transfer (genetics)</term>
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<term>Repetitive Sequences, Nucleic Acid (genetics)</term>
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<front><div type="abstract" xml:lang="en">We have determined the sequence of the 1003-bp control region (also referred to as the 'displacement-loop region') and flanking tRNA genes in the mitochondrial DNA (mtDNA) of the rainbow trout, Oncorhynchus mykiss. This region has the same overall structure (i.e., trnT-trnP-control region-trnF) as in mammalian and amphibian (Xenopus laevis) mitochondrial (mt)DNAs. The trout control region contains apparent homologues of the conserved sequence blocks (CSB) and termination-associated sequences identified in all other vertebrate mtDNA control regions; however, it is distinguished by having an imperfect direct repeat (68/73 bp; 77% positional identity) in the right domain (proximal to the phenylalanine tRNA gene), downstream from CSB-3 in the direction of heavy-strand transcription. Within the control region, rainbow trout mtDNA shares considerable sequence similarity with the mtDNAs of Atlantic cod, Gadus morhua (Johansen et al., Nucleic Acids Res. 18 (1990) 411-419] and white sturgeon, Acipenser transmontanus (Buroker et al., Genetics 124 (1990) 157-163). The highest level of identity in pairwise comparisons is 60-70% over about 80 bp in the right domain (encompassing CSB-2 and CSB-3). About 270 bp comprising the central domain of the control region (encompassing a polypyrimidine tract) are more moderately conserved (55-60% identity in pairwise comparisons), while the left domain is highly divergent. Comparison of five trout mitochondrial tRNA sequences with their human and X. laevis homologues emphasizes the strong A+T substitution bias shown by the human sequences.</div>
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<Abstract><AbstractText>We have determined the sequence of the 1003-bp control region (also referred to as the 'displacement-loop region') and flanking tRNA genes in the mitochondrial DNA (mtDNA) of the rainbow trout, Oncorhynchus mykiss. This region has the same overall structure (i.e., trnT-trnP-control region-trnF) as in mammalian and amphibian (Xenopus laevis) mitochondrial (mt)DNAs. The trout control region contains apparent homologues of the conserved sequence blocks (CSB) and termination-associated sequences identified in all other vertebrate mtDNA control regions; however, it is distinguished by having an imperfect direct repeat (68/73 bp; 77% positional identity) in the right domain (proximal to the phenylalanine tRNA gene), downstream from CSB-3 in the direction of heavy-strand transcription. Within the control region, rainbow trout mtDNA shares considerable sequence similarity with the mtDNAs of Atlantic cod, Gadus morhua (Johansen et al., Nucleic Acids Res. 18 (1990) 411-419] and white sturgeon, Acipenser transmontanus (Buroker et al., Genetics 124 (1990) 157-163). The highest level of identity in pairwise comparisons is 60-70% over about 80 bp in the right domain (encompassing CSB-2 and CSB-3). About 270 bp comprising the central domain of the control region (encompassing a polypyrimidine tract) are more moderately conserved (55-60% identity in pairwise comparisons), while the left domain is highly divergent. Comparison of five trout mitochondrial tRNA sequences with their human and X. laevis homologues emphasizes the strong A+T substitution bias shown by the human sequences.</AbstractText>
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Rainbow trout mitochondrial DNA: sequence and structural characteristics of the non-coding control region and flanking tRNA genes.

Rainbow trout mitochondrial DNA: sequence and structural characteristics of the non-coding control region and flanking tRNA genes.

Source :

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

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Pour générer des pages wiki