Nucleic Acids Research, 1980, Vol. 8, No. 21 4911-4917
© 1980
MOLECULAR BIOLOGY |
Nucleotide sequence of Crithidia fasciculata cytosol 5S ribosomal ribonucleic acid
Department of Biochemistry, Faculty of Medicine, Dalhousie University Halifax, Nova Scotia B3H 4H7, Canada
Received August 25, 1980. The complete nucleotide sequence of the cytosol 5S ribosomal ribonucleic acid of the trypanosomatid protozoan Crithidia fasciculata has been determined by a combination of T1-oligonucleotide cataloging and gel sequencing techniques. The sequence is: GAGUACGACCAUACUUGAGUGAAAACACCAUAUCCCGUCCGAUUUGUGAAGUUAAGCACCCACAGGCUUAGUUAGUACUGAGGUCAGUGAUGACUCGGGAACCCUGAGUGCCGUACUCCCOH. This 5S ribosomal RNA is unique in having GAUU in place of the GAAC or GAUC found in all other prokaryotic and eukaryotic 5S RNAs, and thought to be involved in inter actions with tRNAs. Comparisons to other eukaryotic cytosol 5S ribosomal RNA sequences indicate that the four major eukaryotic kingdoms (animals, plants, fungi, and protists) are about equally remote from each other, and that the latter kingdom may be the most internally diverse.