Ribosomal protein L10 family, P0 and L10e subfamily; composed of eukaryotic 60S ribosomal protein P0 and the archaeal P0 homolog, L10e. P0 or L10e forms a tight complex with multiple copies of the small acidic protein L12(e). This complex forms a stalk structure on the large subunit of the ribosome. The stalk is known to contain the binding site for elongation factors G and Tu (EF-G and EF-Tu, respectively); however, there is disagreement as to whether or not L10 is involved in forming the binding site. The stalk is believed to be associated with GTPase activities in protein synthesis. In a neuroblastoma cell line, L10 has been shown to interact with the SH3 domain of Src and to activate the binding of the Nck1 adaptor protein with skeletal proteins such as the Wiskott-Aldrich Syndrome Protein (WASP) and the WASP-interacting protein (WIP). These eukaryotic and archaeal P0 sequences have an additional C-terminal domain homologous with acidic proteins P1 and P2.
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