Location, location, location: membrane targeting directed by PX domains.
Phosphoinositide (PI)-binding domains play critical roles in the intracellular localization of a variety of cell-signaling proteins. The 120-amino acid Phox homology (PX) domain targets proteins to organelle membranes through interactions between two conserved basic motifs within the PX domain and specific PIs. The combination of protein-lipid and protein-protein interactions ensures the proper localization and regulation of PX domain-containing proteins. Upon proper localization, PX domain-containing proteins can then bind to additional proteins and execute their functions in a diverse set of biological pathways, including intracellular protein transport, cell growth and survival, cytoskeletal organization, and neutrophil defense.[1]References
- Location, location, location: membrane targeting directed by PX domains. Sato, T.K., Overduin, M., Emr, S.D. Science (2001) [Pubmed]
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