Genetic Variant MED12:p.Thr344Ala (chrX-71121745-A-G) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_005120.3(MED12):c.1030A>G(p.Thr344Ala) variant causes a missense change. The variant allele was found at a frequency of 0.000000911 in 1,097,791 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T344N) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 23)

Exomes 𝑓: 9.1e-7 ( 0 hom. 0 hem. )

Consequence

MED12
NM_005120.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 5.81

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

FG syndrome 1
Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Orphanet
MED12-related intellectual disability syndrome
Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
X-linked intellectual disability with marfanoid habitus
Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Orphanet
blepharophimosis - intellectual disability syndrome, MKB type
Inheritance: XL Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet
cholestasis-pigmentary retinopathy-cleft palate syndrome
Inheritance: XL Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)

MED12 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.11052197).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MED12	NM_005120.3 link	c.1030A>G	p.Thr344Ala	missense_variant	Exon 7 of 45	ENST00000374080.8	NP_005111.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MED12	ENST00000374080.8 link	c.1030A>G	p.Thr344Ala	missense_variant	Exon 7 of 45	1	NM_005120.3	ENSP00000363193.3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

9.11e-7

AC:

AN:

1097791

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

363169

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26401

American (AMR)

AF:

0.00

AC:

AN:

35194

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19331

East Asian (EAS)

AF:

0.00

AC:

AN:

30198

South Asian (SAS)

AF:

0.00

AC:

AN:

54087

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40498

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4130

European-Non Finnish (NFE)

AF:

0.00000119

AC:

AN:

841877

Other (OTH)

AF:

0.00

AC:

AN:

46075

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.078

BayesDel_addAF

Benign

-0.22

BayesDel_noAF

Benign

-0.55

CADD

Benign

(source)

DANN

Benign

0.92

DEOGEN2

Benign

0.033

T;.;T

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Benign

0.75

T;T;T

M_CAP

Benign

0.028

MetaRNN

Benign

0.11

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.0

.;L;L

PhyloP100

5.8

PrimateAI

Uncertain

0.49

PROVEAN

Benign

-1.6

N;N;N

REVEL

Benign

0.065

Sift

Benign

0.28

T;T;T

Sift4G

Benign

0.35

T;T;T

Polyphen

0.0080

B;B;B

Vest4

0.18

MutPred

0.18

.;Loss of glycosylation at T344 (P = 0.0041);Loss of glycosylation at T344 (P = 0.0041);

MVP

0.59

MPC

1.1

ClinPred

0.70

GERP RS

5.6

Varity_R

0.17

gMVP

0.43

Mutation Taster

=91/9

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over