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

  1. ↑ "Escherichia coli 16S ribosomal RNA". 13 June 2017.
  2. ↑ "Halobacterium salinarum 16S ribosomal RNA". 7 August 1991.
  3. ↑ "Homo sapiens 18S ribosomal RNA (nuclear)". 2 May 1986.
  4. ↑ Homo sapiens mitochondrion, complete genome. "Revised Cambridge Reference Sequence (rCRS): accession NC_012920", National Center for Biotechnology Information. Retrieved on 20 February 2017.
  5. ↑ Anderson S, Bankier AT, Barrell BG, de Bruijn MH, Coulson AR, Drouin J, et al. (April 1981). "Sequence and organization of the human mitochondrial genome". Nature. 290 (5806): 457–465. Bibcode:1981Natur.290..457A. doi:10.1038/290457a0. PMID 7219534. S2CID 4355527.
  6. ↑ "Arabidopsis thaliana 16S ribosomal RNA (chloroplast)". 26 September 2019.
  7. ↑ Woese CR, Kandler O, Wheelis ML (June 1990). "Towards a natural system of organisms: proposal for the domains Archaea, Bacteria, and Eucarya". Proceedings of the National Academy of Sciences of the United States of America. 87 (12): 4576–4579. Bibcode:1990PNAS...87.4576W. doi:10.1073/pnas.87.12.4576. PMC 54159. PMID 2112744.
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