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Identification of PSD-95 palmitoylating enzymes.

Authors: Fukata, M  Fukata, Y  Adesnik, H  Nicoll, RA  Bredt, DS 
Citation: Fukata M, etal., Neuron 2004 Dec 16;44(6):987-96.
Pubmed: (View Article at PubMed) PMID:15603741
DOI: Full-text: DOI:10.1016/j.neuron.2004.12.005

Palmitoylation is a lipid modification that plays a critical role in protein trafficking and function throughout the nervous system. Palmitoylation of PSD-95 is essential for its regulation of AMPA receptors and synaptic plasticity. The enzymes that mediate palmitoyl acyl transfer to PSD-95 have not yet been identified; however, proteins containing a DHHC cysteine-rich domain mediate palmitoyl acyl transferase activity in yeast. Here, we isolated 23 mammalian DHHC proteins and found that a subset specifically palmitoylated PSD-95 in vitro and in vivo. These PSD-95 palmitoyl transferases (P-PATs) showed substrate specificity, as they did not all enhance palmitoylation of Lck, SNAP-25b, Galpha(s), or H-Ras in cultured cells. Inhibition of P-PAT activity in neurons reduced palmitoylation and synaptic clustering of PSD-95 and diminished AMPA receptor-mediated neurotransmission. This study suggests that P-PATs regulate synaptic function through PSD-95 palmitoylation.


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CRRD Object Information
CRRD ID: 1359058
Created: 2005-07-24
Species: All species
Last Modified: 2005-07-24
Status: ACTIVE


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