50S ribosomal protein L4 and 50S ribosomal protein L32 (L4, L32)

The 50S ribosomal subunit is the larger component of the prokaryotic 70S ribosome and functions as the site of peptide bond formation during translation. **50S ribosomal protein L4** is a highly conserved protein located near the peptidyl transferase center and the exit tunnel; it interacts with rRNA and is involved in both ribosome assembly and the catalysis of peptide bond formation. L4 also has secondary roles in feedback regulation of ribosomal protein operon expression, and its structure features distinctive RNA-binding domains and protein–protein interaction sites[1][6]. **50S ribosomal protein L32** is a small, basic protein component of the 50S subunit that helps stabilize ribosomal structure by binding rRNA, although it does not have a direct functional role in catalysis. Both L4 and L32 are essential for correct ribosome assembly and function. Mutations in L4, in particular, are associated with antibiotic resistance, as this region of the ribosome is a major target for several clinically important antibiotics[1]. The combined targeting of these proteins is not standard, as they are distinct structural entities within the ribosome.

Other names

L4: Ribosomal protein L4rplD (gene symbol in bacteria)L32: Ribosomal protein L32rplF (gene symbol in bacteria)

Inhibition of protein synthesis by binding to the 50S subunit, often at or near the peptidyl transferase center or the nascent peptide exit tunnel (L4 contribution) Disruption of ribosomal assembly and mRNA translation