Small subunit rRNA gene sequence

Small subunit rRNA gene sequences have been determined for a large number of nematode taxa distributed across the phylum (Ellis et al., 1986 Zarlenga et al, 1994a,b Fitch et al., 1995 Fitch and Thomas, 1997 Aleshin et al, 1998 Blaxter et al., 1998 Kampfer et al, 1998 Dorris et al., 1999). These can thus be used to examine the relationships of the different nematode orders. The pattern of nematode evolution that emerges is... 

Mallatt, J. and Winchell, C.J. (2002) Testing the new animal phylogeny first use of combined large-subunit and small-subunit rRNA gene sequences to classify the protostomes. Molecular Biology and Evolution 19, 289-301. 

Cai J, Roberts IN, Collins MD Phylogenetic relationships among members of the ascomycetous yeast genera Brettanomyces, Debaryomyces, Dekkera, and Kluyveromyces deduced by small-subunit rRNA gene sequences. Int J Syst Bacteriol 1996 46 542-549. 

Haase G, Sonntag L, van der Peer Y, Uijthof JMJ, Podbielski A, Melzer Krick B Phylogenetic analysis of ten black yeast species using nuclear small subunit rRNA gene sequences. Antonie Van Leeuwenhoek 1995 68 19-33. 

Dolezal D, Jrrku M, Maslov DA, Lukes J. Phylogeny of the bodonid flagellates (Kinetoplastida) based on small-subunit rRNA gene sequences. Int J System Evol Microbiol. 2000 50 1943-51. 

One of the largest collections of published environmental small subunit rRNA gene clones from any source is that from marine prokaryotic plankton [20]. This dataset currently includes more than 600 identified bacterial clones. A comprehensive analysis of these sequences has shown that identical sequences falling into similar clades are recovered from geographically and ecologically... 

Omer Ali, P.O., Simpson, A.J., Allen, R., Waters, A.P., Humphries, C.J., Johnston, D.A. and Rollinson, D. (1991) Sequence of a small subunit rRNA gene of Schistosoma mansoni and its use in phylogenetic analysis. Molecular and Biochemical Parasitology 46, 201 -208. 

Martinez-Murcia, A.J., Harland, N.M., and Collins, M.D. 1993. Phylogenetic analysis of some leuconostocs and related organisms as determined from large-subunit rRNA gene sequences assessment of congruence of small- and large-subunit rRNA derived trees. J. Appl. Bacteriol. 74, 532-541. 

Picon, M., Gutell, R.R., Ehrlich, R. and Zaha, A. (1996) Characterisation of a flatworm ribosomal RNA-encod-ing gene promoter sequence and small subunit rRNA secondary structure. Genetics 1 71, 215-220. 

Fig. 1.1. The phylogenetic structure of the Nematoda revealed by small subunit ribosomal RNA analysis. (A) Neighbour-joining (NJ) analysis of aligned ssu rRNA genes from nematodes. The alignment is based on that of Blaxter etal. (1998), with the addition of sequences from Aleshin etal. (1998), Nadler (1998)...

Throughout the 2003 mesocosm study, water (50-500 ml) was collected every third day onto 0.8 gm Supor membrane filters (Pall corp.) and stored at -80°C until analysis. Following enumeration of Phaeocystis sp. single cells and colonies, two samples were chosen for molecular determination of the composition of the Phaeocystis sp. community. Gene sequence analysis of Phaeocystis sp. small subunit ribosomal RNA (rRNA) genes from samples collected from a fertilized enclosure early in the experiment when only single cells were present (5 March 2003 single cells 15 ml"1,... 

Table 3.2. Divergence (%) in 12 mitochondrial protein-coding genes (nucleotide sequence (above diagonal) and amino acid sequence (below diagonal)) and in nucleotide sequences of the mitochondrial large (rrnL) (above diagonal) and small (rrnS) (below diagonal) ribosomal RNA (rRNA) subunits between the sheep-dog (EgG1) and horse-dog (EgG4) strains of Echinococcus granulosus, E. multilocularis (Em) and Taenia crassiceps (Tc). (After Le ef a/., 2002.)...

RNA polymerase III transcribes the small genes for the many different tRNAs and the 5 S rRNA of the large ribosomal subunit. The primary tRNA transcripts in eukaryotes are transformed into mature tRNAs by endonuclease removal of a 5 -leader sequence, and replacement of a 3 -terminal UU by CCA. 

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