10.3389/fgene.2019.00058.s001 Fátima Lopes Fátima Lopes Fátima Torres Fátima Torres Gabriela Soares Gabriela Soares Clara D. van Karnebeek Clara D. van Karnebeek Cecília Martins Cecília Martins Diana Antunes Diana Antunes João Silva João Silva Lauren Muttucomaroe Lauren Muttucomaroe Luís Filipe Botelho Luís Filipe Botelho Susana Sousa Susana Sousa Paula Rendeiro Paula Rendeiro Purificação Tavares Purificação Tavares Hilde Van Esch Hilde Van Esch Evica Rajcan-Separovic Evica Rajcan-Separovic Patrícia Maciel Patrícia Maciel Table_1_The Role of AKT3 Copy Number Changes in Brain Abnormalities and Neurodevelopmental Disorders: Four New Cases and Literature Review.DOCX Frontiers 2019 1q43-q44 CNVs AKT3 microcephaly macrocephaly ZBTB18 SDCCAG8 phenotypic expressivity 2019-02-22 04:10:00 Dataset https://frontiersin.figshare.com/articles/dataset/Table_1_The_Role_of_AKT3_Copy_Number_Changes_in_Brain_Abnormalities_and_Neurodevelopmental_Disorders_Four_New_Cases_and_Literature_Review_DOCX/7755308 <p>Microdeletions at 1q43-q44 have been described as resulting in a clinically recognizable phenotype of intellectual disability (ID), facial dysmorphisms and microcephaly (MIC). In contrast, the reciprocal microduplications of 1q43-q44 region have been less frequently reported and patients showed a variable phenotype, including macrocephaly. Reports of a large number of patients with copy number variations involving this region highlighted the AKT3 gene as a likely key player in head size anomalies. We report four novel patients with copy number variations in the 1q43-q44 region: one with a larger deletion (3.7Mb), two with smaller deletions affecting AKT3 and SDCCAG8 genes (0.16 and 0.18Mb) and one with a quadruplication (1Mb) that affects the entire AKT3 gene. All patients with deletions presented MIC without structural brain abnormalities, whereas the patient with quadruplication had macrocephaly, but his carrier father had normal head circumference. Our report also includes a comparison of phenotypes in cases with 1q43-q44 duplications to assist future genotype-phenotype correlations. Our observations implicate AKT3 as a contributor to ID/development delay (DD) and head size but raise doubts about its straightforward impact on the latter aspect of the phenotype in patients with 1q43-q44 deletion/duplication syndrome.</p>