PROSITE documentation PDOC00901
Ribosomal protein L21e signature


A number of eukaryotic and archaebacterial ribosomal proteins can be grouped on the basis of sequence similarities. One of these families consists of:

  • Mammalian L21 [1].
  • Entamoeba histolytica L21 [2].
  • Caenorhabditis elegans L21 (C14B9.7).
  • Yeast L21E (URP1) [3].
  • Halobacterium marismortui HL31 [4].

These proteins have 160 (eukaryotes) or 95 (archebacteria) amino-acid residues. As a signature pattern, we selected a conserved region in the central part of these proteins.

Last update:

April 2006 / Pattern revised.


Technical section

PROSITE method (with tools and information) covered by this documentation:

RIBOSOMAL_L21E, PS01171; Ribosomal protein L21e signature  (PATTERN)


1AuthorsDevi K.R.G. Chan Y.-L. Wool I.G.
TitleThe primary structure of rat ribosomal protein L21.
SourceBiochem. Biophys. Res. Commun. 162:364-370(1989).
PubMed ID2751657

2AuthorsPetter R. Rozenblatt S. Nuchamowitz Y. Mirelman D.
TitleLinkage between actin and ribosomal protein L21 genes in Entamoeba histolytica.
SourceMol. Biochem. Parasitol. 56:329-333(1992).
PubMed ID1484554

3AuthorsJank B. Waldherr M. Schweyen R.J.
TitleYeast single copy gene URP1 is a homolog of rat ribosomal protein gene L21.
SourceCurr. Genet. 23:15-18(1993).
PubMed ID8428379

4AuthorsHatakeyama T. Kimura M.
TitleComplete amino acid sequences of the ribosomal proteins L25, L29 and L31 from the archaebacterium Halobacterium marismortui.
SourceEur. J. Biochem. 172:703-711(1988).
PubMed ID3350019

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