rs752300879

Positions:

chrX-71121754-A-G

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 1P and 7B. PP2BP4_ModerateBP6BS2

The NM_005120.3(MED12):c.1039A>G(p.Ser347Gly) variant causes a missense change. The variant allele was found at a frequency of 0.000201 in 1,209,512 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 73 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0000090 ( 0 hom., 0 hem., cov: 23)

Exomes 𝑓: 0.00022 ( 0 hom. 73 hem. )

Consequence

MED12
NM_005120.3 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 6.90

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 Likely_benign. Variant got -6 ACMG points.

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), MED12. . Gene score misZ 6.5797 (greater than the threshold 3.09). GenCC has associacion of gene with 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=0.091215074).

BP6

Variant X-71121754-A-G is Benign according to our data. Variant chrX-71121754-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 213631.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Benign=1, Uncertain_significance=2}. Variant chrX-71121754-A-G is described in Lovd as [Likely_benign].

BS2

High Hemizygotes in GnomAdExome4 at 73 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MED12	NM_005120.3 linkuse as main transcript	c.1039A>G	p.Ser347Gly	missense_variant	7/45	ENST00000374080.8	NP_005111.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MED12	ENST00000374080.8 linkuse as main transcript	c.1039A>G	p.Ser347Gly	missense_variant	7/45	1	NM_005120.3	ENSP00000363193	P4	Q93074-1

Frequencies

GnomAD3 genomes

AF:

0.00000897

AC:

AN:

111465

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

33703

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000189

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000166

AC:

AN:

180568

Hom.:

AF XY:

0.0000300

AC XY:

AN XY:

66666

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:

0.0000372

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000220

AC:

242

AN:

1098047

Hom.:

Cov.:

AF XY:

0.000201

AC XY:

AN XY:

363409

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:

0.000283

Gnomad4 OTH exome

AF:

0.0000868

GnomAD4 genome

AF:

0.00000897

AC:

AN:

111465

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

33703

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000189

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000416

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Familial thoracic aortic aneurysm and aortic dissection

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 30, 2021

The c.1039A>G (p.S347G) alteration is located in exon 7 (coding exon 7) of the MED12 gene. This alteration results from a A to G substitution at nucleotide position 1039, causing the serine (S) at amino acid position 347 to be replaced by a glycine (G). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

X-linked intellectual disability with marfanoid habitus;C3698541:Blepharophimosis - intellectual disability syndrome, MKB type;C5399762:FG syndrome 1

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Oct 31, 2018

- -

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Apr 21, 2021

- -

FG syndrome

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 09, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.090

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.75

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.053

T;.;T

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Benign

0.80

T;T;T

M_CAP

Benign

0.027

MetaRNN

Benign

0.091

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.4

.;L;L

MutationTaster

Benign

0.99

D;D;D

PrimateAI

Uncertain

0.55

PROVEAN

Benign

-1.8

.;N;N

REVEL

Benign

0.038

Sift

Benign

0.11

.;T;T

Sift4G

Uncertain

0.053

T;T;T

Polyphen

0.0

B;B;B

Vest4

0.19

MutPred

0.18

.;Loss of glycosylation at S347 (P = 0.0113);Loss of glycosylation at S347 (P = 0.0113);

MVP

0.56

MPC

0.85

ClinPred

0.28

GERP RS

4.5

Varity_R

0.43

gMVP

0.43

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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