In:
Canadian Journal of Microbiology, Canadian Science Publishing, Vol. 35, No. 1 ( 1989-01-01), p. 73-80
Abstract:
Unrooted phylogenetic dendrograms were calculated by two independent methods, parsimony and distance matrix analysis, from an alignment of the derived amino acid sequences of the A and C subunits of the DNA-dependent RNA polymerases of the archaebacteria Sulfolobus acidocaldarius and Halobacterium halobium with 12 corresponding sequences including a further set of archaebacterial A + C subunits, eukaryotic nuclear RNA polymerases, pol I, pol II, and pol III, eubacterial β′ and chloroplast β′ and β″ subunits. They show the archaebacteria as a coherent group in close neighborhood of and sharing a bifurcation with eukaryotic pol II and (or) pol IIIA components. The most probable trees show pol IA branching off from the tree separately at a bifurcation with the eubacterial β′ lineage. The implications of these results, especially for understanding the possibly chimeric origin of the eukaryotic nuclear genome, are discussed.Key words: transcription, evolution, taxonomy, subunits, gene organization.
Type of Medium:
Online Resource
ISSN:
0008-4166
,
1480-3275
Language:
English
Publisher:
Canadian Science Publishing
Publication Date:
1989
detail.hit.zdb_id:
280534-0
detail.hit.zdb_id:
1481972-7
SSG:
12
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