Intellectual disability
Gene: FBN1Following discussion with the clinical team, this gene has been demoted from Amber to Red, in accordance with the external review by Zornitza StarkCreated: 17 Aug 2020, 9:32 a.m. | Last Modified: 17 Aug 2020, 9:32 a.m.
Panel Version: 3.251
Of all the phenotypes associated with FBN1, only Weill-Marchesani has ID reported in about 20% of individuals.Created: 2 Feb 2020, 8:42 a.m. | Last Modified: 2 Feb 2020, 8:42 a.m.
Panel Version: 3.0
Comment on list classification: Changed rating of gene from Red to Amber. This gene was rated as Amber in v2.467 and incorrectly automatically demoted to Red in v2.468. This was due to a defect in the automatic PanelApp uploading tool where a reference gene list was added as a new Source (Victorian Clinical Genetics Services), and under certain conditions associated to previous sources listed, resulted in the rating of the gene being automatically changed when it should not have been.Created: 29 Sep 2018, 9:28 p.m.
Variants in this gene cause Marfan syndrome, which does not include intellectual disability. Several cases with variants in this gene have been reported with intellectual disability, although it seems unclear whether other genes are involved that underly the ID phenotype in these patients. This is a confirmed DD gene for Marfan syndrome, MASS syndrome/overlap connective tissue disease, Shprintzen-Goldberg craniosynostosis syndrome, and a possible DD gene for Weill-Marchesani syndrome and isolated ectopia lentis. It is in the list of ID genes in Gilissen et al, 2014 PMID: 24896178.Created: 13 Dec 2017, 9:46 p.m.
Mode of inheritance
MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Phenotypes
Marfan syndrome 154700; MASS syndrome 604308; Weill-Marchesani syndrome 2, dominant 608328; Marfan lipodystrophy syndrome 616914
Publications
Phenotypes
MARFAN SYNDROME (MFS)
This is a pertinent gene from the NIHR BioResource - Rare Diseases Study (NIHRBR-RD) BRIDGE Study : SPEED (Specialist Pathology: Evaluating Exomes in Diagnostics) which covers epilepsies, movement and microcephaly disorders, this gene is on the SPEED_NEURO_20170705 gene list. Evidences used for SPEED NEURO gene list: in_ddg2p_20141118_conf;in_ddg2p_20141118_conf;in_ddg2p_201507;in_ddg2p_201507_conf;in_ddg2p_2_4_2017;in_ddg2p_2_4_2017_conf;in_gilissen_2014_known;in_UKGTN_v12 . Main mutation mechanism : Dominant negative; UncertainCreated: 27 Jul 2017, 5:46 p.m.
Evidences key, gene present in following gene lists and main mutation mechanism : ddg2p_20141118; ddg2p_20141118_conf; ddg2p_201507; ddg2p_201507_conf; gilissen_2014_known; UKGTN_v12; Nijmegen_ID_diagnostic; Nijmegen_ID_candidates; GEL_ID_red_20160217; neuro_20160418_strict; Dominant negative; Uncertain. This is a pertinent gene from the BRIDGE Study : SPEED (Specialist Pathology: Evaluating Exomes in Diagnostics) which covers epilepsies, movement and microcephaly disorders, this gene comes from the SPEED_NEURO_v3.0_20170404 gene list. The following experts from the BRIDGE consortium NIHRBR-RD contributed to this panel: - Professor F. Lucy Raymond, Cambridge Institute for Medical Research, University of Cambridge - Manju Kurian, Paediatric neurologist, Great Ormond Street Hosptial - Keren Carss, NIHR BioResource - Rare Diseases, Cambridge University Hospitals NHS Foundation Trust - Alba Sanchis-Juan, NIHR BioResource - Rare Diseases, Cambridge University Hospitals NHS Foundation Trust - Marie Erwood NIHR BioResource - Rare Diseases, Cambridge University Hospitals NHS Foundation Trust - Louise Daugherty, NIHR BioResource - Rare Diseases, Cambridge University Hospitals NHS Foundation TrustCreated: 19 Jul 2017, 12:26 p.m.
Mode of inheritance
MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications
Mode of pathogenicity
Other - please provide details in the comments
Source Expert Review Red was added to FBN1. Rating Changed from Amber List (moderate evidence) to Red List (low evidence)
Gene: fbn1 has been classified as Amber List (Moderate Evidence).
Source Victorian Clinical Genetics Services was added to FBN1.
12.03.2018: Due to major updates completed (Phase 1, 2 and 3), this panel was promoted to Version 2 in order to reflect the major updates since November 2017 which have resulted in reviews for 836 genes added by Genomics England Curators and the Clinical Team, 130 new Green genes added to the interpretation pipeline (from 751 to 881 Green genes), and the gene total has increased from 1879 to 1927.
Model of inheritance for gene FBN1 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene FBN1 was set to ['23506379', '20478419', ' 16596670', '24896178']
The Gel status was updated for this whole panel
The Gel status was updated for this whole panel
FBN1 was added to Intellectual disabilitypanel. Source: Expert Review Red
FBN1 was added to Intellectual disabilitypanel. Sources: Radboud University Medical Center, Nijmegen