Function
PREPL is a serine peptidase with a precise substrate specificity that remains unclear. It does not cleave peptides following arginine or lysine residues. PREPL regulates trans-Golgi network morphology and sorting by controlling the membrane binding of the AP-1 complex. This protein may also play a role in regulating synaptic vesicle exocytosis.
Gene References Into Functions
- We report the first homozygous PREPL point mutation in a girl with typical PREPL deficiency. This syndrome should be considered in the differential diagnosis of hypotonic neonates exhibiting myasthenic symptoms, hyperphagia, and varying degrees of intellectual disability. PMID: 29483676
- Deletion of PREPL is associated with Hypotonia-cystinuria syndrome. PMID: 23794250
- Two novel deletions encompassing the SLC3A1 and PREPL genes have been identified in unrelated hypotonia-cystinuria syndrome patients. PMID: 22796000
- Description of L-leucine transport into bladder carcinoma cells. PMID: 12225859
- A 638-residue variant of PREPL, PREPL A, was identified, expressed in Escherichia coli, and purified. Its secondary structure was similar to that of oligopeptidase B. PMID: 16143824
- Deletion of PREPL, a gene encoding a putative serine oligopeptidase, in patients with hypotonia-cystinuria syndrome. PMID: 16385448
- Deletion of the gene results in hypotonia at birth, failure to thrive, and growth hormone deficiency. PMID: 16913837
- A deletion of PREPL causes atypical hypotonia-cystinuria syndrome. PMID: 18234729
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Involvement In Disease
Hypotonia-cystinuria syndrome (HCS); Myasthenic syndrome, congenital, 22 (CMS22)
Protein Families
Peptidase S9A family
Subcellular Location
Cytoplasm, cytosol. Golgi apparatus, trans-Golgi network. Cytoplasm, cytoskeleton. Golgi apparatus. Nucleus.
Tissue Specificity
Expressed in pyramidal neurons of the temporal cortex and neocortex (at protein level). Widely expressed. Expressed at higher level in brain, skeletal muscle, heart and kidney. Expressed at the endplates in the neuromuscular junction.