PPT1 Antibody – Rabbit Polyclonal

The protein encoded by this gene is a small glycoprotein involved in the catabolism of lipid-modified proteins during lysosomal degradation. The encoded enzyme removes thioester-linked fatty acyl groups such as palmitate from cysteine residues. Defects in this gene are a cause of infantile neuronal ceroid lipofuscinosis 1 (CLN1, or INCL) and neuronal ceroid lipofuscinosis 4 (CLN4). Two transcript variants encoding different isoforms have been found for this gene.

PPT1: Removes thioester-linked fatty acyl groups such as palmitate from modified cysteine residues in proteins or peptides during lysosomal degradation. Prefers acyl chain lengths of 14 to 18 carbons. Defects in PPT1 are the cause of neuronal ceroid lipofuscinosis type 1 (CLN1). A form of neuronal ceroid lipofuscinosis with variable age at onset. Infantile, late- infantile, juvenile, and adult onset have been reported. Neuronal ceroid lipofuscinoses are progressive neurodegenerative, lysosomal storage diseases characterized by intracellular accumulation of autofluorescent liposomal material, and clinically by seizures, dementia, visual loss, and/or cerebral atrophy. The lipopigment pattern seen most often in CLN1 is referred to as granular osmiophilic deposits (GROD). Belongs to the palmitoyl-protein thioesterase family. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Hydrolase; Lipid Metabolism - fatty acid elongation in mitochondria; EC 3.1.2.22

Chromosomal Location of Human Ortholog: 1p32

Cellular Component: Golgi apparatus; extracellular space; synaptic vesicle; membrane; cell soma; lysosome; axon; dendrite; extracellular region; nucleus; cytosol; lipid raft

Molecular Function: palmitoyl-(protein) hydrolase activity; palmitoyl-CoA hydrolase activity

Biological Process: pinocytosis; adult locomotory behavior; neurotransmitter secretion; positive regulation of receptor-mediated endocytosis; protein transport; visual perception; protein catabolic process; cofactor transport; negative regulation of neuron apoptosis; associative learning; grooming behavior; receptor-mediated endocytosis; nervous system development; regulation of phospholipase A2 activity; response to stimulus; positive regulation of pinocytosis; sphingolipid catabolic process; cellular protein catabolic process; regulation of synapse structure and activity; lysosomal lumen acidification; cofactor metabolic process; neuron development; brain development; negative regulation of cell growth; lipid raft organization and biogenesis; lipid catabolic process; negative regulation of apoptosis; protein depalmitoylation

Disease: Ceroid Lipofuscinosis, Neuronal, 1