rs797045697

Variant names:

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 1P and 13B. PP2BP4_StrongBP6BS1BS2

The NM_005120.3(MED12):c.2128G>A(p.Val710Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000237 in 1,097,993 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 10 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: not found (cov: 21)

Exomes 𝑓: 0.000024 ( 0 hom. 10 hem. )

Consequence

MED12
NM_005120.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:1

Conservation

PhyloP100: 2.00

Variant links:

Genes affected

MED12 (HGNC:11957): (mediator complex subunit 12) The initiation of transcription is controlled in part by a large protein assembly known as the preinitiation complex. A component of this preinitiation complex is a 1.2 MDa protein aggregate called Mediator. This Mediator component binds with a CDK8 subcomplex which contains the protein encoded by this gene, mediator complex subunit 12 (MED12), along with MED13, CDK8 kinase, and cyclin C. The CDK8 subcomplex modulates Mediator-polymerase II interactions and thereby regulates transcription initiation and reinitation rates. The MED12 protein is essential for activating CDK8 kinase. Defects in this gene cause X-linked Opitz-Kaveggia syndrome, also known as FG syndrome, and Lujan-Fryns syndrome. [provided by RefSeq, Aug 2009]

MED12 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -12 ACMG points.

PP2

Missense variant in the MED12 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 37 curated pathogenic missense variants (we use a threshold of 10). The gene has 108 curated benign missense variants. Gene score misZ: 6.5797 (above the threshold of 3.09). GenCC associations: The gene is linked to MED12-related intellectual disability syndrome, X-linked intellectual disability with marfanoid habitus, blepharophimosis - intellectual disability syndrome, MKB type, FG syndrome 1, cholestasis-pigmentary retinopathy-cleft palate syndrome.

BP4

Computational evidence support a benign effect (MetaRNN=0.066464216).

BP6

Variant X-71125048-G-A is Benign according to our data. Variant chrX-71125048-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 211471.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=2}.

BS1

Variant frequency is greater than expected in population nfe. gnomad4_exome allele frequency = 0.0000237 (26/1097993) while in subpopulation NFE AF= 0.0000309 (26/841911). AF 95% confidence interval is 0.0000215. There are 0 homozygotes in gnomad4_exome. There are 10 alleles in male gnomad4_exome subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High Hemizygotes in GnomAdExome4 at 10 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MED12	NM_005120.3 link	c.2128G>A	p.Val710Met	missense_variant	Exon 15 of 45	ENST00000374080.8	NP_005111.2	Q93074-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MED12	ENST00000374080.8 link	c.2128G>A	p.Val710Met	missense_variant	Exon 15 of 45	1	NM_005120.3	ENSP00000363193.3		Q93074-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000110

AC:

AN:

181772

Hom.:

AF XY:

0.0000148

AC XY:

AN XY:

67608

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000245

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000237

AC:

AN:

1097993

Hom.:

Cov.:

AF XY:

0.0000275

AC XY:

AN XY:

363347

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000309

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 13, 2014

Genetic Services Laboratory, University of Chicago

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Familial thoracic aortic aneurysm and aortic dissection

Uncertain:1

Jan 18, 2018

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.V710M variant (also known as c.2128G>A), located in coding exon 15 of the MED12 gene, results from a G to A substitution at nucleotide position 2128. The valine at codon 710 is replaced by methionine, an amino acid with highly similar properties. This amino acid position is not well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

not provided

Benign:1

Jun 24, 2021

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Not observed at significant frequency in large population cohorts (Lek et al., 2016); In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge; This variant is associated with the following publications: (PMID: 27535533) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.081

BayesDel_addAF

Benign

-0.44

BayesDel_noAF

Benign

-0.82

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.032

T;.;T

FATHMM_MKL

Uncertain

0.87

LIST_S2

Benign

0.79

T;T;T

M_CAP

Benign

0.011

MetaRNN

Benign

0.066

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.34

.;N;N

PrimateAI

Benign

0.42

PROVEAN

Benign

-0.22

.;N;N

REVEL

Benign

0.043

Sift

Benign

0.095

.;T;T

Sift4G

Benign

0.063

T;D;D

Polyphen

0.0020

B;B;B

Vest4

0.16

MutPred

0.12

.;Loss of methylation at K711 (P = 0.0513);Loss of methylation at K711 (P = 0.0513);

MVP

0.32

MPC

0.94

ClinPred

0.14

GERP RS

4.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.12

gMVP

0.14

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over