Severe early-onset obesity
Gene: MYT1LComment on publications: 26240977 - patient with normal weight at 4.5 years of age;
25232846 - In this study we evaluated a cohort of 22 patients (15 sporadic patients and two families) with a 2p25.3 aberration to further refine the clinical phenotype and to delineate the role of MYT1L in intellectual disability and obesity. Complete MYT1L deletion, intragenic deletion, or duplication was observed in all sporadic patients, in addition to two patients with a de novo point mutation in MYT1L - PMID: 26240977 comments on this article “Although overweight in patients with MYT1L haploinsufficiency was previously described as an early-onset feature, we cannot reject the possibility that our patient will develop obesity in late childhood, as occurs in other patients. On the other hand, taking into account the World Health Organization definition of overweight and obesity based on both weight and body mass index, it is remarkable that of the four patients with alteration affecting exclusively MYT1L who were described by De Rocker et al. (PMID:25232846), only patient 10, with a body mass index > 30 kg/m2, strictly meets these criteria.”;25126114 - 2p25.3 de novo terminal deletion of 1.9 Mb in in a girl of 4.4 years with a distinctive phenotype consisting of early-onset of obesity associated with moderate ID, and hyperkinetic disorder. The deletion disrupted MYT1L and encompassed five other OMIM genes, ACP1, TMEM18, SNTG2, TPO, and PXDN);24129437 - five unrelated patients with 2p25 deletion of paternal origin presenting with early-onset obesity, hyperphagia, intellectual deficiency, and behavioural difficulties. Analysis of the genes encompassed in the deleted region led us to speculate that the ACP1, TMEM18, and/or MYT1L genes might be involved in early-onset obesity;21990140 - we identified deletions of 2p25.3, sized 0.37-3.13 Mb, in three adult siblings and three unrelated patients. All patients had ID, obesity or overweight and/or a square-shaped stature without overt facial dysmorphic features. Combining our data with phenotypic and genotypic data of three patients from the literature we defined the minimal region of overlap which contained one gene, i.e., MYT1L.Created: 16 Mar 2021, 4:55 p.m. | Last Modified: 16 Mar 2021, 4:55 p.m.
Panel Version: 2.23
Variants in this GENE are reported as part of current diagnostic practice
Comment on list classification: Promoted to green due to new evidence and green review, after checking internally with the Clinical team at Genomics England.Created: 13 Aug 2018, 4:05 p.m.
PMID: 28859103 (Aug 2017) - report 9 patients with MYT1L Single Nucleotide Variants (4 loss of function and 5 missense), through the DDD Project and Gene Matcher. The phenotype of SNV carriers overlapped with that of 2p25.3 deletion carriers. All patients had motor delay and speech delay, and 85% were obese/overweight. This gene is a Green gene on the Intellectual Disability panel version 2.85.Created: 1 Jun 2018, 12:50 p.m.
Comment on list classification: Gene added by reviewer and rated green. Literature search carried out - see notes under publications section. Three studies report multiple unrelated patients with deletions which include other genes as well as this gene. PMID:25232846 - does report de novo point mutations in this gene, though PMID:26240977 comments that only one patient would be considered overweight/obese based on WHO criteria. PMID:26240977 - Report a de novo intragenic deletion of MYT1L in a female patient with intellectual disability (she did not have obesity at 4.5 years of age, but they comment she may develop it).Created: 19 Oct 2016, 7:08 a.m.
recent paper multiple unrelated probands with de novo loss of function or missense variants in functional domains. majority were overweight or obese, all had intellectual disability. I have also reviewed a case report of a patient with obesity and intellectual disability and de novo loss of function variant in MYT1L.Created: 16 Apr 2018, 9:16 p.m.
Mode of inheritance
MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Phenotypes
obesity; intellectual disability
Publications
Publications for gene: MYT1L were set to 26240977 - patient with normal weight at 4.5 years of age; 25232846 - In this study we evaluated a cohort of 22 patients (15 sporadic patients and two families) with a 2p25.3 aberration to further refine the clinical phenotype and to delineate the role of MYT1L in intellectual disability and obesity. Complete MYT1L deletion, intragenic deletion, or duplication was observed in all sporadic patients, in addition to two patients with a de novo point mutation in MYT1L - PMID: 26240977 comments on this article “Although overweight in patients with MYT1L haploinsufficiency was previously described as an early-onset feature, we cannot reject the possibility that our patient will develop obesity in late childhood, as occurs in other patients. On the other hand, taking into account the World Health Organization definition of overweight and obesity based on both weight and body mass index, it is remarkable that of the four patients with alteration affecting exclusively MYT1L who were described by De Rocker et al. (PMID:25232846), only patient 10, with a body mass index > 30 kg/m2, strictly meets these criteria.”; 25126114 - 2p25.3 de novo terminal deletion of 1.9 Mb in in a girl of 4.4 years with a distinctive phenotype consisting of early-onset of obesity associated with moderate ID, and hyperkinetic disorder. The deletion disrupted MYT1L and encompassed five other OMIM genes, ACP1, TMEM18, SNTG2, TPO, and PXDN); 24129437 - five unrelated patients with 2p25 deletion of paternal origin presenting with early-onset obesity, hyperphagia, intellectual deficiency, and behavioural difficulties. Analysis of the genes encompassed in the deleted region led us to speculate that the ACP1, TMEM18, and/or MYT1L genes might be involved in early-onset obesity; 21990140 - we identified deletions of 2p25.3, sized 0.37-3.13 Mb, in three adult siblings and three unrelated patients. All patients had ID, obesity or overweight and/or a square-shaped stature without overt facial dysmorphic features. Combining our data with phenotypic and genotypic data of three patients from the literature we defined the minimal region of overlap which contained one gene, i.e., MYT1L.
Phenotypes for gene: MYT1L were changed from obesity; Mental retardation, autosomal dominant 39, 616521; intellectual disability to obesity; Mental retardation, autosomal dominant 39, OMIM:616521
Source Expert list was added to MYT1L. Added phenotypes Mental retardation, autosomal dominant 39, 616521 for gene: MYT1L
Gene: myt1l has been classified as Green List (High Evidence).
25/Oct/2016: Panel revised according to expert review and additional curation with internal discussion. Ready to be promoted to version 1.
This gene has been classified as Amber List (Moderate Evidence).
This gene has been classified as Amber List (Moderate Evidence).
Publications for MYT1L were set to 26240977 - patient with normal weight at 4.5 years of age; 25232846 - In this study we evaluated a cohort of 22 patients (15 sporadic patients and two families) with a 2p25.3 aberration to further refine the clinical phenotype and to delineate the role of MYT1L in intellectual disability and obesity. Complete MYT1L deletion, intragenic deletion, or duplication was observed in all sporadic patients, in addition to two patients with a de novo point mutation in MYT1L - PMID: 26240977 comments on this article “Although overweight in patients with MYT1L haploinsufficiency was previously described as an early-onset feature, we cannot reject the possibility that our patient will develop obesity in late childhood, as occurs in other patients. On the other hand, taking into account the World Health Organization definition of overweight and obesity based on both weight and body mass index, it is remarkable that of the four patients with alteration affecting exclusively MYT1L who were described by De Rocker et al. (PMID:25232846), only patient 10, with a body mass index > 30 kg/m2, strictly meets these criteria.”; 25126114 - 2p25.3 de novo terminal deletion of 1.9 Mb in in a girl of 4.4 years with a distinctive phenotype consisting of early-onset of obesity associated with moderate ID, and hyperkinetic disorder. The deletion disrupted MYT1L and encompassed five other OMIM genes, ACP1, TMEM18, SNTG2, TPO, and PXDN); 24129437 - five unrelated patients with 2p25 deletion of paternal origin presenting with early-onset obesity, hyperphagia, intellectual deficiency, and behavioural difficulties. Analysis of the genes encompassed in the deleted region led us to speculate that the ACP1, TMEM18, and/or MYT1L genes might be involved in early-onset obesity; 21990140 - we identified deletions of 2p25.3, sized 0.37-3.13 Mb, in three adult siblings and three unrelated patients. All patients had ID, obesity or overweight and/or a square-shaped stature without overt facial dysmorphic features. Combining our data with phenotypic and genotypic data of three patients from the literature we defined the minimal region of overlap which contained one gene, i.e., MYT1L.
Publications for MYT1L were set to 26240977 - patient with normal weight at 4.5 years of age; 25232846 - In this study we evaluated a cohort of 22 patients (15 sporadic patients and two families) with a 2p25.3 aberration to further refine the clinical phenotype and to delineate the role of MYT1L in intellectual disability and obesity. Complete MYT1L deletion, intragenic deletion, or duplication was observed in all sporadic patients, in addition to two patients with a de novo point mutation in MYT1L - PMID: 26240977 comments on this article “Although overweight in patients with MYT1L haploinsufficiency was previously described as an early-onset feature,2 we cannot reject the possibility that our patient will develop obesity in late childhood, as occurs in other patients.1 On the other hand, taking into account the World Health Organization definition of overweight and obesity based on both weight and body mass index,3 it is remarkable that of the four patients with alteration affecting exclusively MYT1L who were described by De Rocker et al.,1 only patient 10, with a body mass index > 30 kg/m2, strictly meets these criteria.” ; 25126114 - 2p25.3 de novo terminal deletion of 1.9 Mb in in a girl of 4.4 years with a distinctive phenotype consisting of early-onset of obesity associated with moderate ID, and hyperkinetic disorder. The deletion disrupted MYT1L and encompassed five other OMIM genes, ACP1, TMEM18, SNTG2, TPO, and PXDN); 24129437 - five unrelated patients with 2p25 deletion of paternal origin presenting with early-onset obesity, hyperphagia, intellectual deficiency, and behavioural difficulties. Analysis of the genes encompassed in the deleted region led us to speculate that the ACP1, TMEM18, and/or MYT1L genes might be involved in early-onset obesity; 21990140 - we identified deletions of 2p25.3, sized 0.37-3.13 Mb, in three adult siblings and three unrelated patients. All patients had ID, obesity or overweight and/or a square-shaped stature without overt facial dysmorphic features. Combining our data with phenotypic and genotypic data of three patients from the literature we defined the minimal region of overlap which contained one gene, i.e., MYT1L.
Publications for MYT1L were set to 26240977 - patient with normal weight at 4.5 years of age; 25232846 - In this study we evaluated a cohort of 22 patients (15 sporadic patients and two families) with a 2p25.3 aberration to further refine the clinical phenotype and to delineate the role of MYT1L in intellectual disability and obesity. Complete MYT1L deletion, intragenic deletion, or duplication was observed in all sporadic patients, in addition to two patients with a de novo point mutation in MYT1L; 25126114 - 2p25.3 de novo terminal deletion of 1.9 Mb in in a girl of 4.4 years with a distinctive phenotype consisting of early-onset of obesity associated with moderate ID, and hyperkinetic disorder. The deletion disrupted MYT1L and encompassed five other OMIM genes, ACP1, TMEM18, SNTG2, TPO, and PXDN); 24129437 - five unrelated patients with 2p25 deletion of paternal origin presenting with early-onset obesity, hyperphagia, intellectual deficiency, and behavioural difficulties. Analysis of the genes encompassed in the deleted region led us to speculate that the ACP1, TMEM18, and/or MYT1L genes might be involved in early-onset obesity; 21990140 - we identified deletions of 2p25.3, sized 0.37-3.13 Mb, in three adult siblings and three unrelated patients. All patients had ID, obesity or overweight and/or a square-shaped stature without overt facial dysmorphic features. Combining our data with phenotypic and genotypic data of three patients from the literature we defined the minimal region of overlap which contained one gene, i.e., MYT1L.
Publications for MYT1L were set to 26240977 - patient with normal weight at 4.5 years of age; 25232846; 25126114 - 2p25.3 de novo terminal deletion of 1.9 Mb in in a girl of 4.4 years with a distinctive phenotype consisting of early-onset of obesity associated with moderate ID, and hyperkinetic disorder. The deletion disrupted MYT1L and encompassed five other OMIM genes, ACP1, TMEM18, SNTG2, TPO, and PXDN); 24129437 - five unrelated patients with 2p25 deletion of paternal origin presenting with early-onset obesity, hyperphagia, intellectual deficiency, and behavioural difficulties. Analysis of the genes encompassed in the deleted region led us to speculate that the ACP1, TMEM18, and/or MYT1L genes might be involved in early-onset obesity; 21990140 - we identified deletions of 2p25.3, sized 0.37-3.13 Mb, in three adult siblings and three unrelated patients. All patients had ID, obesity or overweight and/or a square-shaped stature without overt facial dysmorphic features. Combining our data with phenotypic and genotypic data of three patients from the literature we defined the minimal region of overlap which contained one gene, i.e., MYT1L.
Publications for MYT1L were set to 26240977 (patient with normal weight at 4.5 years of age); 25232846; 25126114 (2p25.3 de novo terminal deletion of 1.9 Mb in in a girl of 4.4 years with a distinctive phenotype consisting of early-onset of obesity associated with moderate ID, and hyperkinetic disorder. The deletion disrupted MYT1L and encompassed five other OMIM genes, ACP1, TMEM18, SNTG2, TPO, and PXDN); 24129437; 21990140
Publications for MYT1L were set to 26240977 (patient with normal weight at 4.5 years of age); 25232846; 25126114; 24129437; 21990140
Publications for MYT1L were set to http://www.ncbi.nlm.nih.gov/pubmed/26240977; 25232846; 25126114; 24129437; 21990140
Publications for MYT1L were set to http://www.ncbi.nlm.nih.gov/pubmed/26240977; 25232846; 25126114; 24129437
Publications for MYT1L were set to http://www.ncbi.nlm.nih.gov/pubmed/26240977; 25232846; 25126114
Publications for MYT1L were set to http://www.ncbi.nlm.nih.gov/pubmed/26240977;25232846
MYT1L was created by [email protected]
MYT1L was added to Significant early-onset obesity +/- other endocrine features and short staturepanel. Sources: Literature