14-3-3 domain

A homodimer is shown with a short oligopeptide ligand bound to each monomer (red and blue). The two peptides (yellow and cyan) have a phospho-serine, shown in magenta. This is the basis of recognition. Heterodimers with other 14-3-3 proteins can occur also.


A structural basis for 14-3-3 sigma functional specificity.
Wilker EW, Grant RA, Artim SC, Yaffe MB.
J Biol Chem. 2005 May 13;280(19):18891-8. Epub 2005 Feb 24.

(PubMed)

1ywt (PDB)

 

14-3-3 Proteins: diverse functions in cell proliferation and cancer progression.
Freeman AK, Morrison DK.
Semin Cell Dev Biol. 2011 Sep;22(7):681-7. doi: 10.1016/j.semcdb.2011.08.009. Epub 2011 Aug 22. Review.
PMID: 21884813 Free PMC Article

Abstract
The 14-3-3 proteins were the first phosphoserine/phosphothreonine-binding proteins to be discovered, a finding that provided the foundation for their prominent role in cell signaling. 14-3-3 family members interact with a wide spectrum of proteins including transcription factors, biosynthetic enzymes, cytoskeletal proteins, signaling molecules, apoptosis factors, and tumor suppressors. The interaction with 14-3-3 can have a profound effect on a target protein, altering its localization, stability, conformation, phosphorylation state, activity, and/or molecular interactions. Thus, by modulating the function of a diverse array of binding partners, 14-3-3 proteins have become key regulatory components in many vital cellular processes - processes that are crucial for normal growth and development and that often become dysregulated in human cancer. This review will examine the recent advances that further elucidate the role of 14-3-3 proteins in normal growth and cancer signaling with a particular emphasis on the signaling pathways that impact cell proliferation, cell migration, and epithelial-to-mesenchymal transition.

The 14-3-3 proteins: integrators of diverse signaling cues that impact cell fate and cancer development.
Morrison DK.
Trends Cell Biol. 2009 Jan;19(1):16-23. doi: 10.1016/j.tcb.2008.10.003. Epub 2008 Nov 20. Review.
PMID: 19027299 Free PMC Article

Abstract
The highly conserved 14-3-3 protein family has risen to a position of importance in cell biology owing to its involvement in vital cellular processes, such as metabolism, protein trafficking, signal transduction, apoptosis and cell-cycle regulation. The 14-3-3 proteins are phospho-serine/phospho-threonine binding proteins that interact with a diverse array of binding partners. Because many 14-3-3 interactions are phosphorylation-dependent, 14-3-3 has been tightly integrated into the core phospho-regulatory pathways that are crucial for normal growth and development and that often become dysregulated in human disease states such as cancer. This review examines the recent advances that further elucidate the role of 14-3-3 proteins as integrators of diverse signaling cues that influence cell fate decisions and tumorigenesis.