The name of this superfamily has been modified since the most recent official CATH+ release (v4_2_0). At the point of the last release, this superfamily was named:"
Ribosomal protein S18".
S18 is thought to be involved in binding of the aminoacyl-tRNA complex, due to its location within the platform (P) region. S18 is well exposed on the surface of the E. coli ribosome, and is a secondary rRNA binding protein. Along with other ribosomal proteins (S15 and S6), S18 contributes to the formation of the tree-helix junction in the central domain of 16S rRNA (three-helix junction). The S18 protein, unlike S15 and S6, contains a single small element of regular secondary structure, yet it forms a compact structure tightly packed against S6 and the RNA.
|Domain clusters (>95% seq id):||4|
|Domain clusters (>35% seq id):||3|
|Structural Clusters (5A):||1|
|Structural Clusters (9A):||1|