Biology:SSU rRNA

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Short description: One of the two major RNA components of the ribosome

Small subunit ribosomal ribonucleic acid (SSU rRNA) is the smaller of the two major RNA components of the ribosome. Associated with a number of ribosomal proteins, the SSU rRNA forms the small subunit of the ribosome. It is encoded by SSU-rDNA.

SSU rRNA
Identifiers
SymbolSSU
RfamCL00111
Other data
PDB structuresPDBe

Characteristics

Characteristics of the SSU rRNA for exemplary species.
Type SSU rRNA size Species Length Accession Reference
Bacterial (Prokaryotic) 16S Escherichia coli 1,541 nt J01859.1 [1]
Archaeal (Prokaryotic) 16S Halobacterium salinarum 1,473 nt M38280.1 [2]
Eukaryotic 18S Homo sapiens 1,969 nt M10098.1 [3]
Mitochondrial 12S Homo sapiens 954 nt NC_012920.1 [4][5]
Plastid 16S Arabidopsis thaliana 1,491 nt NC_000932.1 [6]

Use in phylogenetics

SSU rRNA sequences are widely used for determining evolutionary relationships among organisms, since they are of ancient origin and are found in all known forms of life.[7]

See also

  • LSU rRNA: the large subunit ribosomal ribonucleic acid.

References