Ribosomal protein L21-like (IPR028909)

Short name: L21p-like

Overlapping homologous superfamilies

Family relationships


This entry represents large ribosomal subunit protein L21 and mitochondrial ribosomal subunit from yeast L49 (Mrpl49). In S. pombe, the putative mitochondrial ribosomal protein bL21 (Mrpl49) is fused to aconitase [PMID: 25724335]. L21 has a small beta-barrel-like domain that is connected to an extended loop [PMID: 11733066].

In Escherichia coli, L21 is known to bind to the 23S rRNA in the presence of L20. It belongs to a family of ribosomal proteins which, on the basis of sequence similarities, groups:

  • Bacterial L21.
  • Marchantia polymorpha chloroplast L21.
  • Cyanelle L21.
  • Plant chloroplast L21 (nuclear-encoded).

Bacterial L21 is a protein of about 100 amino-acid residues, the mature form of the spinach chloroplast L21 has 200 residues.

GO terms

Biological Process

No terms assigned in this category.

Molecular Function

No terms assigned in this category.

Cellular Component

GO:0005840 ribosome

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.