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Clinical and functional characterization of two novel ZBTB20 mutations causing Primrose syndrome


Stellacci, Emilia; Steindl, Katharina; Joset, Pascal; Mercurio, Laura; Anselmi, Massimiliano; Cecchetti, Serena; Gogoll, Laura; Zweier, Markus; Hackenberg, Annette; Bocchinfuso, Gianfranco; Stella, Lorenzo; Tartaglia, Marco; Rauch, Anita (2018). Clinical and functional characterization of two novel ZBTB20 mutations causing Primrose syndrome. Human Mutation, 39(7):959-964.

Abstract

Primrose syndrome (PS) is a rare disorder characterized by macrocephaly, tall stature, intellectual disability, autistic traits, and disturbances of glucose metabolism with insulin-resistant diabetes and distal muscle wasting occurring in adulthood. The disorder is caused by functional dysregulation of ZBTB20, a transcriptional repressor controlling energetic metabolism and developmental programs. ZBTB20 maps in a genomic region that is deleted in the 3q13.31 microdeletion syndrome, which explains the clinical overlap between the two disorders. A narrow spectrum of amino acid substitutions in a restricted region of ZBTB20 encompassing the first and second zinc-finger motifs have been reported thus far. Here, we characterize clinically and functionally the first truncating mutation [(c.1024delC; p.(Gln342Serfs*42)] and a missense change affecting the third zinc-finger motif of the protein [(c.1931C > T; p.(Thr644Ile)]. Our data document that both mutations have dominant negative impact on wild-type ZBTB20, providing further evidence of the specific behavior of PS-causing mutations on ZBTB20 function.

Abstract

Primrose syndrome (PS) is a rare disorder characterized by macrocephaly, tall stature, intellectual disability, autistic traits, and disturbances of glucose metabolism with insulin-resistant diabetes and distal muscle wasting occurring in adulthood. The disorder is caused by functional dysregulation of ZBTB20, a transcriptional repressor controlling energetic metabolism and developmental programs. ZBTB20 maps in a genomic region that is deleted in the 3q13.31 microdeletion syndrome, which explains the clinical overlap between the two disorders. A narrow spectrum of amino acid substitutions in a restricted region of ZBTB20 encompassing the first and second zinc-finger motifs have been reported thus far. Here, we characterize clinically and functionally the first truncating mutation [(c.1024delC; p.(Gln342Serfs*42)] and a missense change affecting the third zinc-finger motif of the protein [(c.1931C > T; p.(Thr644Ile)]. Our data document that both mutations have dominant negative impact on wild-type ZBTB20, providing further evidence of the specific behavior of PS-causing mutations on ZBTB20 function.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Children's Hospital Zurich > Medical Clinic
04 Faculty of Medicine > Institute of Medical Genetics
Dewey Decimal Classification:570 Life sciences; biology
610 Medicine & health
Language:English
Date:July 2018
Deposited On:09 Jan 2019 12:56
Last Modified:03 Mar 2019 06:50
Publisher:Wiley-Blackwell Publishing, Inc.
ISSN:1059-7794
OA Status:Closed
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1002/humu.23546
PubMed ID:29737001

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