40S ribosomal protein S23
Function
Component of the ribosome, a large ribonucleoprotein complex responsible for the synthesis of proteins in the cell (PubMed:23636399, PubMed:25901680, PubMed:25957688, PubMed:28257692). The small ribosomal subunit (SSU) binds messenger RNAs (mRNAs) and translates the encoded message by selecting cognate aminoacyl-transfer RNA (tRNA) molecules (PubMed:23636399, PubMed:25901680, PubMed:25957688). The large subunit (LSU) contains the ribosomal catalytic site termed the peptidyl transferase center (PTC), which catalyzes the formation of peptide bonds, thereby polymerizing the amino acids delivered by tRNAs into a polypeptide chain (PubMed:23636399, PubMed:25901680, PubMed:25957688). The nascent polypeptides leave the ribosome through a tunnel in the LSU and interact with protein factors that function in enzymatic processing, targeting, and the membrane insertion of nascent chains at the exit of the ribosomal tunnel (PubMed:23636399, PubMed:25901680, PubMed:25957688). Plays an important role in translational accuracy (PubMed:28257692). Part of the small subunit (SSU) processome, first precursor of the small eukaryotic ribosomal subunit. During the assembly of the SSU processome in the nucleolus, many ribosome biogenesis factors, an RNA chaperone and ribosomal proteins associate with the nascent pre-rRNA and work in concert to generate RNA folding, modifications, rearrangements and cleavage as well as targeted degradation of pre-ribosomal RNA by the RNA exosome (PubMed:34516797).
Involvement in disease
Brachycephaly, trichomegaly, and developmental delay
BTDD
An autosomal dominant developmental disorder characterized by brachycephaly, ciliary trichomegaly, dysmorphic features of the face and hands, hearing loss, and developmental delay with short stature. Intellectual disability and autism spectrum disorder may be present in some patients.
None
The disease is caused by variants affecting the gene represented in this entry.
Post-translational modifications
Hydroxylation at Pro-62 affects translation termination efficiency.
Sequence Similarities
Belongs to the universal ribosomal protein uS12 family.
Cellular localization
- Cytoplasm
- Cytosol
- Cytoplasm
- Rough endoplasmic reticulum
- Nucleus
- Nucleolus
- Detected on cytosolic polysomes (PubMed:25957688). Detected in ribosomes that are associated with the rough endoplasmic reticulum (By similarity).
Alternative names
Small ribosomal subunit protein uS12, 40S ribosomal protein S23, RPS23