The crystal structure of palmitoyl protein thioesterase 1 and the molecular basis of infantile neuronal ceroid lipofuscinosis.Bellizzi III, J.J., Widom, J., Kemp, C., Lu, J.Y., Das, A.K., Hofmann, S.L., Clardy, J.
(2000) Proc.Natl.Acad.Sci.USA 97: 4573-4578
- PubMed: 10781062
- DOI: 10.1073/pnas.080508097
- Primary Citation of Related Structures:  1EI9
- PubMed Abstract:
- Purification and Properties of a Palmitoyl Protein Thioesterase that Cleaves Palmitate from H-Ras
Camp, L.A.,Hofmann, S.L.
(1993) J.Biol.Chem. 268: 22566
- Mutations in the Palmitoyl Protein Thioesterase Gene Causing Infantile Neuronal Ceroid Lipofuscinosis
Vesa, J.,Hellsten, E.,Verkruyse, L.A.,Camp, L.A.,Rapola, J.,Santavuori, P.,Hofmann, S.L.,Peltonen, L.
(1995) Nature 376: 584
Mutations in palmitoyl-protein thioesterase 1 (PPT1), a lysosomal enzyme that removes fatty acyl groups from cysteine residues in modified proteins, cause the fatal inherited neurodegenerative disorder infantile neuronal ceroid lipofuscinosis. The ac ...
Mutations in palmitoyl-protein thioesterase 1 (PPT1), a lysosomal enzyme that removes fatty acyl groups from cysteine residues in modified proteins, cause the fatal inherited neurodegenerative disorder infantile neuronal ceroid lipofuscinosis. The accumulation of undigested substrates leads to the formation of neuronal storage bodies that are associated with the clinical symptoms. Less severe forms of PPT1 deficiency have been found recently that are caused by a distinct set of PPT1 mutations, some of which retain a small amount of thioesterase activity. We have determined the crystal structure of PPT1 with and without bound palmitate by using multiwavelength anomalous diffraction phasing. The structure reveals an alpha/beta-hydrolase fold with a catalytic triad composed of Ser115-His289-Asp233 and provides insights into the structural basis for the phenotypes associated with PPT1 mutations.
Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA.