Obtaining a more resolute teleost growth hormone phylogeny by the introduction of gaps in sequence alignment.
Identifieur interne : 000850 ( Ncbi/Merge ); précédent : 000849; suivant : 000851Obtaining a more resolute teleost growth hormone phylogeny by the introduction of gaps in sequence alignment.
Auteurs : D A Rubin [États-Unis] ; R M DoresSource :
- Molecular phylogenetics and evolution [ 1055-7903 ] ; 1995.
English descriptors
- KwdEn :
- MESH :
- chemical , chemistry : Growth Hormone.
- genetics : Fishes, Growth Hormone.
- Amino Acid Sequence, Animals, Molecular Sequence Data, Phylogeny, Sequence Alignment, Sequence Homology, Amino Acid.
Abstract
In order to obtain a more resolute phylogeny of teleosts based on growth hormone (GH) sequences, phylogenetic analyses were performed in which deletions (gaps), which appear to be order specific, were upheld to maintain GH's structural information. Sequences were analyzed at 194 amino acid positions. In addition, the two closest genealogically related groups to the teleosts, Amia calva and Acipenser guldenstadti, were used as outgroups. Modified sequence alignments were also analyzed to determine clade stability. Analyses indicated, in the most parsimonious cladogram, that molecular and morphological relationships for the orders of fishes are congruent. With GH molecular sequence data it was possible to resolve all clades at the familial level. Analyses of the primary sequence data indicate that: (a) the halecomorphean and chondrostean GH sequences are the appropriate outgroups for generating the most parsimonious cladogram for teleosts; (b) proper alignment of teleost GH sequence by the inclusion of gaps is necessary for resolution of the Percomorpha; and (c) removal of sequence information by deleting improperly aligned sequence decreases the phylogenetic signal obtained.
DOI: 10.1006/mpev.1995.1013
PubMed: 7663758
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Sequences were analyzed at 194 amino acid positions. In addition, the two closest genealogically related groups to the teleosts, Amia calva and Acipenser guldenstadti, were used as outgroups. Modified sequence alignments were also analyzed to determine clade stability. Analyses indicated, in the most parsimonious cladogram, that molecular and morphological relationships for the orders of fishes are congruent. With GH molecular sequence data it was possible to resolve all clades at the familial level. Analyses of the primary sequence data indicate that: (a) the halecomorphean and chondrostean GH sequences are the appropriate outgroups for generating the most parsimonious cladogram for teleosts; (b) proper alignment of teleost GH sequence by the inclusion of gaps is necessary for resolution of the Percomorpha; and (c) removal of sequence information by deleting improperly aligned sequence decreases the phylogenetic signal obtained.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">7663758</PMID><DateCreated><Year>1995</Year><Month>10</Month><Day>12</Day></DateCreated><DateCompleted><Year>1995</Year><Month>10</Month><Day>12</Day></DateCompleted><DateRevised><Year>2006</Year><Month>11</Month><Day>15</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">1055-7903</ISSN><JournalIssue CitedMedium="Print"><Volume>4</Volume><Issue>2</Issue><PubDate><Year>1995</Year><Month>Jun</Month></PubDate></JournalIssue><Title>Molecular phylogenetics and evolution</Title><ISOAbbreviation>Mol. 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