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Intellectual disability syndromic and non-syndromic v1.96 MED16 Zornitza Stark Phenotypes for gene: MED16 were changed from complex neurodevelopmental disorder MONDO:0100038 to Neurodevelopmental disorder, MONDO:0700092, MED16-related
Intellectual disability syndromic and non-syndromic v1.95 MED16 Zornitza Stark Publications for gene: MED16 were set to
Intellectual disability syndromic and non-syndromic v1.94 MED16 Zornitza Stark reviewed gene: MED16: Rating: GREEN; Mode of pathogenicity: None; Publications: 40081376; Phenotypes: Neurodevelopmental disorder, MONDO:0700092, MED16-related; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Intellectual disability syndromic and non-syndromic v0.6634 MED16 Zornitza Stark Marked gene: MED16 as ready
Intellectual disability syndromic and non-syndromic v0.6634 MED16 Zornitza Stark Gene: med16 has been classified as Green List (High Evidence).
Intellectual disability syndromic and non-syndromic v0.6189 MED16 Bryony Thompson Classified gene: MED16 as Green List (high evidence)
Intellectual disability syndromic and non-syndromic v0.6189 MED16 Bryony Thompson Gene: med16 has been classified as Green List (High Evidence).
Intellectual disability syndromic and non-syndromic v0.6188 MED16 Mark Cleghorn gene: MED16 was added
gene: MED16 was added to Intellectual disability syndromic and non-syndromic. Sources: Other
Mode of inheritance for gene: MED16 was set to BIALLELIC, autosomal or pseudoautosomal
Phenotypes for gene: MED16 were set to complex neurodevelopmental disorder MONDO:0100038
Penetrance for gene: MED16 were set to unknown
Review for gene: MED16 was set to GREEN
Added comment: MED16
Charlotte Guillouet, Imagine institute Paris
ESHG presentation 4/6/24, unpublished

MED16 is part of tail of ‘mediator complex’
Plays a role in enhancer/promotor regions

Disruptive variants in other genes encoding proteins within this mediator complex (MED11/12/12/17/20, CDK8) are assoc w neurodevelopmental/neurodegenerative disorders

Cases
index family
Sibs (M/F) to consanguineous parents w NDD/mod ID, tetralogy of Fallot or VSD, bilat deafness, micrognathia, malar hypoplasia, dental AbN, pre auricular tags, hypoplastic nails, brachydactly
WES: biallelic MED16 p.Asp217Asn

Via genematcher
16 families total, 22 individuals, homozygous or compound het rare MED16 variants
Mixture of pLoF and missense variants

Motor delay in 16/17
DD or ID in 17/17
Speech delay in 15/15
6/19 ToF
7/19 other septal/aortic defects
6/18 deafness
11/18 microretognathia
6/17 cleft palate
8/19 preauricular tags
9/20 puffy eyelids
12/20 nasal dysplasia (most commonly short columella w bulbous nasal tip)
7/20 corpus callosum anomalies

Not clear that functional work recapitulated phenotype as yet?
Immunofluroescence on HeLa cells transfected with variants observed ?conclusion
MED16 knockout mouse > growth delay, pre weaning lethality
MED16 knockout zebrafish > reduced body length, early death, no obvious craniofacial phenotype
Sources: Other