A Novel Heterozygous Missense Mutation in GNAT1 Leads to Autosomal Dominant Riggs Type of Congenital Stationary Night Blindness
Joint Authors
Audo, Isabelle
Zeitz, Christina
Méjécase, Cécile
Stévenard, Mathilde
Michiels, Christelle
Marmor, Michael F.
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-04-23
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Autosomal dominant congenital stationary night blindness (adCSNB) is rare and results from altered phototransduction giving a Riggs type of electroretinogram (ERG) with loss of the rod a-wave and small b-waves.
These patients usually have normal vision in light.
Only few mutations in genes coding for proteins of the phototransduction cascade lead to this condition; most of these gene defects cause progressive rod-cone dystrophy.
Mutation analysis of an adCSNB family with a Riggs-type ERG revealed a novel variant (c.155T>A p.Ile52Asn) in GNAT1 coding for the α-subunit of transducin, cosegregating with the phenotype.
Domain predictions and 3D-modelling suggest that the variant does not affect the GTP-binding site as other GNAT1 adCSNB mutations do.
It affects a predicted nuclear localization signal and a part of the first α-helix, which is distant from the GTP-binding site.
The subcellular protein localization of this and other mutant GNAT1 proteins implicated in CSNB are unaltered in mammalian GNAT1 overexpressing cells.
Our findings add a third GNAT1 mutation causing adCSNB and suggest that different pathogenic mechanisms may cause this condition.
American Psychological Association (APA)
Zeitz, Christina& Méjécase, Cécile& Stévenard, Mathilde& Michiels, Christelle& Audo, Isabelle& Marmor, Michael F.. 2018. A Novel Heterozygous Missense Mutation in GNAT1 Leads to Autosomal Dominant Riggs Type of Congenital Stationary Night Blindness. BioMed Research International،Vol. 2018, no. 2018, pp.1-10.
https://search.emarefa.net/detail/BIM-1128685
Modern Language Association (MLA)
Zeitz, Christina…[et al.]. A Novel Heterozygous Missense Mutation in GNAT1 Leads to Autosomal Dominant Riggs Type of Congenital Stationary Night Blindness. BioMed Research International No. 2018 (2018), pp.1-10.
https://search.emarefa.net/detail/BIM-1128685
American Medical Association (AMA)
Zeitz, Christina& Méjécase, Cécile& Stévenard, Mathilde& Michiels, Christelle& Audo, Isabelle& Marmor, Michael F.. A Novel Heterozygous Missense Mutation in GNAT1 Leads to Autosomal Dominant Riggs Type of Congenital Stationary Night Blindness. BioMed Research International. 2018. Vol. 2018, no. 2018, pp.1-10.
https://search.emarefa.net/detail/BIM-1128685
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1128685