Mental retardation, autosomal recessive 42 MRT42

Alternative name(s) :

Gene_locus : human-PGAP1

Mutation : 9 mutations L197del_human-PGAP1 IVS9-2A>G_human-PGAP1 P92del_human-PGAP1 K308NfsX25_human-PGAP1 Y524X_human-PGAP1 Q466X_human-PGAP1 IVS13+1G>T E113Rfs_human-PGAP1 IVS10+1G>C

OMIM : 615802 , 611655

Comment

(from OMIM) In 2 sibs, born of consanguineous Syrian parents, with MRT42, Murakami et al. (2014) identified a homozygous mutation in the PGAP1 gene. Both had neonatal hypotonia and severely delayed psychomotor development (IQ below 35) with some stereotypic movements. One had both major and absence epilepsy. Brain CT scan of 1 patient showed pronounced brain atrophy. Lymphoblastoid cells derived from the patients showed normal expression of glycosylphosphatidylinositol (GPI)-anchored proteins, but these proteins were resistant to cleavage by PI-specific phospholipase C. These results indicated abnormal GPI structure due to a loss of PGAP1 enzyme activity early in the remodeling process of GPI-anchored proteins. Hereditary spastic paraplegias (HSPs) SPG67

References (6)

Title : Compound heterozygous variants in PGAP1 causing severe psychomotor retardation, brain atrophy, recurrent apneas and delayed myelination: a case report and literature review - Kettwig_2016_BMC.Neurol_16_74
Author(s) : Kettwig M , Elpeleg O , Wegener E , Dreha-Kulaczewski S , Henneke M , Gartner J , Huppke P
Ref : BMC Neurol , 16 :74 , 2016
Abstract : Kettwig_2016_BMC.Neurol_16_74
ESTHER : Kettwig_2016_BMC.Neurol_16_74
PubMedSearch : Kettwig_2016_BMC.Neurol_16_74
PubMedID: 27206732

Title : Cerebral visual impairment and intellectual disability caused by PGAP1 variants - Bosch_2015_Eur.J.Hum.Genet_23_1689
Author(s) : Bosch DG , Boonstra FN , Kinoshita T , Jhangiani S , de Ligt J , Cremers FP , Lupski JR , Murakami Y , de Vries BB
Ref : Eur J Hum Genet , 23 :1689 , 2015
Abstract : Bosch_2015_Eur.J.Hum.Genet_23_1689
ESTHER : Bosch_2015_Eur.J.Hum.Genet_23_1689
PubMedSearch : Bosch_2015_Eur.J.Hum.Genet_23_1689
PubMedID: 25804403

Title : Loss of function of PGAP1 as a cause of severe encephalopathy identified by Whole Exome Sequencing: Lessons of the bioinformatics pipeline - Granzow_2015_Mol.Cell.Probes_29_323
Author(s) : Granzow M , Paramasivam N , Hinderhofer K , Fischer C , Chotewutmontri S , Kaufmann L , Evers C , Kotzaeridou U , Rohrschneider K , Schlesner M , Sturm M , Pinkert S , Eils R , Bartram CR , Bauer P , Moog U
Ref : Mol Cell Probes , 29 :323 , 2015
Abstract : Granzow_2015_Mol.Cell.Probes_29_323
ESTHER : Granzow_2015_Mol.Cell.Probes_29_323
PubMedSearch : Granzow_2015_Mol.Cell.Probes_29_323
PubMedID: 26050939

Title : Additional evidence that PGAP1 loss of function causes autosomal recessive global developmental delay and encephalopathy -
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Ref : Clin Genet , 88 :597 , 2015
PubMedID: 25823418

Title : Exome sequencing links corticospinal motor neuron disease to common neurodegenerative disorders - Novarino_2014_Science_343_506
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Ref : Science , 343 :506 , 2014
Abstract : Novarino_2014_Science_343_506
ESTHER : Novarino_2014_Science_343_506
PubMedSearch : Novarino_2014_Science_343_506
PubMedID: 24482476

Title : Null mutation in PGAP1 impairing Gpi-anchor maturation in patients with intellectual disability and encephalopathy - Murakami_2014_PLoS.Genet_10_e1004320
Author(s) : Murakami Y , Tawamie H , Maeda Y , Buttner C , Buchert R , Radwan F , Schaffer S , Sticht H , Aigner M , Reis A , Kinoshita T , Jamra RA
Ref : PLoS Genet , 10 :e1004320 , 2014
Abstract : Murakami_2014_PLoS.Genet_10_e1004320
ESTHER : Murakami_2014_PLoS.Genet_10_e1004320
PubMedSearch : Murakami_2014_PLoS.Genet_10_e1004320
PubMedID: 24784135
Gene_locus related to this paper: human-PGAP1