Characterization of the str operon genes from Spirulina platensis and their evolutionary relationship to those of other prokaryotes

Autor: Buttarelli, F. R., Calogero, R. A., Tiboni, O., Gualerzi, C. O., Pon, C. L.
Zdroj: Molecular and General Genetics MGG; May 1989, Vol. 217 Issue: 1 p97-104, 8p
Abstrakt: A 5.3 kb DNA segment containing the str operon (ca. 4.5 kb) of the cyanobacterium Spirulina platensis has been sequenced. The str operon includes the structural genes rpsL (ribosomal protein S12), rpsG (ribosomal protein S7), fus (translation elngation factor EF-G) and tuf (translation elongation factor EF-Tu). From the nucleotide sequence of this operon, the primary structures of the four gene products have been derived and compared with the available corresponding structures from eubacteria, archaebacteria and chloroplasts. Extensive homologies were found in almost all cases and in the order S12>EF-Tu>EF-G>S7; the largest homologies were generally found between the cyanobacterial proteins and the corresponding chloroplast gene products. Overall codon usage in S. platensis was found to be rather unbiased.
Databáze: Supplemental Index
Externí odkaz: