A comparison of group II introns of plastid tRNA Lys UUW genes encoding maturase protein

• Autorzy: Jankowiak K , Lesicka J. , Pacak A. , Rybarczyk A. , Szweykowska-Kulinska Z.
• Języki publikacji: EN

Abstrakty

EN

All higher plant plastid genomes have six classes of tRNA genes containing introns. One of those is the tRNALys UUU gene, which encodes maturase protein. In the case of liverwort species from the genus Porella and mosses from the genus Plagiomnium, the maturase coding gene (matK) represents a truncated form of other plant matK genes: several subdomains of the reverse transcriptase-like domain and so-called domain X are not present in these ORFs. These ORFs probably represent pseudogenes of the matK gene. The analysis of codon usage within the matK gene revealed the presence of strong A/T pressure. The use of codons with the third letter being U or A varies from 71-93%. The comparison of maturase amino acid sequences at the family level shows a high identity between species. However, when liverwort and angiosperm maturase sequences are compared, the percentage of identity drops dramatically. The calculated values of the number of nucleotide substitutions vary considerably, even when liverwort species are compared pairwise. The phenetic tree of relationships between plant species on the basis of tRNALys UUU intron sequences concur with the generally accepted plant phylogeny.

Słowa kluczowe

EN

matK gene; Plagiomnium; tRNA gene; plant phylogenesis; gene encoding; maturase protein; Porella; plastid tRNA; higher plant

• Wydawca: -
• Czasopismo: Cellular and Molecular Biology Letters
• Rocznik: 2004
• Tom: 09
• Numer: 2
• Opis fizyczny: p.239-251,fig.,ref.

Twórcy

autor

Jankowiak K

• Adam Mickiewicz University, Miedzychodzka 5, 60-371 Poznan, Poland

autor

Lesicka J.

autor

Pacak A.

autor

Rybarczyk A.

autor

Szweykowska-Kulinska Z.

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