Titre :

Novel missense mutations in ptchd1 alter its plasma membrane subcellular localization and cause intellectual disability and autism spectrum disorder

Auteur(s) :

Halewa, Judith [Auteur]
Marouillat, Sylviane [Auteur]
Dixneuf, Manon [Auteur]
Thepault, Rose-Anne [Auteur]
Ung, Devina C. [Auteur]
Chatron, Nicolas [Auteur]
Gerard, Benedicte [Auteur]
Ghoumid, Jamal [Auteur]
Maladies Rares du Développement : Génétique, Régulation et Protéomique (RADEME) - ULR 7364
Maladies RAres du DÉveloppement embryonnaire et du Métabolisme : du phénotype au génotype et à la Fonction (RADEME) - ULR 7364
Lesca, Gaetan [Auteur]
Till, Marianne [Auteur]
Smol, Thomas [Auteur]
Couque, Nathalie [Auteur]
Ruaud, Lyse [Auteur]
Chune, Valerie [Auteur]
Grotto, Sarah [Auteur]
Verloes, Alain [Auteur]
Vuillaume, Marie-Laure [Auteur]
Toutain, Annick [Auteur]
Raynaud, Martine [Auteur]
Laumonnier, Frederic [Auteur]

Titre de la revue :

Human mutation

Nom court de la revue :

Hum Mutat

Date de publication :

2021-04-15

ISSN :

1098-1004

Mot(s)-clé(s) :

in vitro cellular models
intellectual disability
missense variants
subcellular localization
PTCHD1 (patched domain containing 1) gene
autism spectrum disorder
functional analyses

Discipline(s) HAL :

Sciences du Vivant [q-bio]

Résumé en anglais : [en]

The X-linked PTCHD1 gene, encoding a synaptic membrane protein, has been involved in neurodevelopmental disorders with the description of deleterious genomic microdeletions or truncating coding mutations. Missense variants ...
Lire la suite >The X-linked PTCHD1 gene, encoding a synaptic membrane protein, has been involved in neurodevelopmental disorders with the description of deleterious genomic microdeletions or truncating coding mutations. Missense variants were also identified, however, without any functional evidence supporting their pathogenicity level. We investigated 13 missense variants of PTCHD1, including eight previously described (c.152G>A,p.(Ser51Asn); c.217C>T,p.(Leu73Phe); c.517A>G,p.(Ile173Val); c.542A>C,p.(Lys181Thr); c.583G>A,p.(Val195Ile); c.1076A>G,p.(His359Arg); c.1409C>A,p.(Ala470Asp); c.1436A>G,p.(Glu479Gly)), and five novel ones (c.95C>T,p.(Pro32Leu); c.95C>G,p.(Pro32Arg); c.638A>G,p.(Tyr213Cys); c.898G>C,p.(Gly300Arg); c.928G>C,p.(Ala310Pro)) identified in male patients with intellectual disability (ID) and/or autism spectrum disorder (ASD). Interestingly, several of these variants involve amino acids localized in structural domains such as transmembrane segments. To evaluate their potentially deleterious impact on PTCHD1 protein function, we performed in vitro overexpression experiments of the wild-type and mutated forms of PTCHD1-GFP in HEK 293T and in Neuro-2a cell lines as well as in mouse hippocampal primary neuronal cultures. We found that six variants impaired the expression level of the PTCHD1 protein, and were retained in the endoplasmic reticulum suggesting abnormal protein folding. Our functional analyses thus provided evidence of the pathogenic impact of missense variants in PTCHD1, which reinforces the involvement of the PTCHD1 gene in ID and in ASD.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille

Collections :

• Maladies Rares du Développement : Génétique, Régulation et Protéomique (RADEME) - ULR 7364

Date de dépôt :

2021-09-02T07:02:45Z