THE CYANELLE STR OPERON FROM CYANOPHORA-PARADOXA - SEQUENCE-ANALYSIS AND PHYLOGENETIC IMPLICATIONS

被引：33

作者：

KRAUS, M

GOTZ, M

LOFFELHARDT, W

机构：

[1] INST ALLGEMEINE BIOCHEM,WAHRINGERSTR 38,A-1090 VIENNA,AUSTRIA

[2] LUDWIG BOLTZMANN FORSCHUNG BIOCHEM,A-1090 VIENNA,AUSTRIA

来源：

PLANT MOLECULAR BIOLOGY | 1990年 / 15卷 / 04期

关键词：

cyanelle; Cyanophora paradoxa; phylogenetic analysis; plastid evolution; str operon;

D O I：

10.1007/BF00017831

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The str operon containing the genes for the ribosomal proteins S12 (rps12) and S7 (rps7) and for the elongation factors G (fus) and Tu (tufA) has been characterized for some cyanobacteria and chloroplasts from algae and higher plants. In the case of plastids a stepwise reduction. by one and two genes, respectively, has been observed due to gene transfer to the nuclear genome. The nucleotide sequence of the str operon on the cyanelle genome from Cyanophora paradoxa was determined as a first example for a chlorophyll b-less plastid. It comprises rps12, rps7 and tufA which are closely linked and not interrupted by introns. Transcript analysis revealed cotranscription of the two ribosomal protein genes whereas tufA gave rise to a monocistronic mRNA. Phylogenetic studies using these three different traits allowed an assessment of the position of Cyanophora paradoxa among oxygenic photoautotrophs. © 1990 Kluwer Academic Publishers.

引用

页码：561 / 573

页数：13

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