X-71140797-ACAG-ACAGCAGCAG

Variant names:

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP3BP6BS1BS2

The NM_005120.3(MED12):c.6223_6228dupCAGCAG(p.Gln2075_Gln2076dup) variant causes a conservative inframe insertion change. The variant allele was found at a frequency of 0.000182 in 109,909 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 3 hemizygotes in GnomAD. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00018 ( 0 hom., 3 hem., cov: 22)

Exomes 𝑓: 0.00030 ( 0 hom. 57 hem. )

Failed GnomAD Quality Control

Consequence

MED12
NM_005120.3 conservative_inframe_insertion

Scores

Not classified

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:4

Conservation

PhyloP100: 4.36

Publications

4 publications found

Variant links:

COSMIC-nc: COSV105882314

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:

ENSG00000228427 (HGNC:):

ENSG00000228427 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -10 ACMG points.

BP3

Nonframeshift variant in repetitive region in NM_005120.3

BP6

Variant X-71140797-A-ACAGCAG is Benign according to our data. Variant chrX-71140797-A-ACAGCAG is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 213619.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.000182 (20/109909) while in subpopulation NFE AF = 0.000343 (18/52464). AF 95% confidence interval is 0.000222. There are 0 homozygotes in GnomAd4. There are 3 alleles in the male GnomAd4 subpopulation. Median coverage is 22. This position passed quality control check.

BS2

High Hemizygotes in GnomAd4 at 3 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MED12	NM_005120.3 link	c.6223_6228dupCAGCAG	p.Gln2075_Gln2076dup	conservative_inframe_insertion	Exon 42 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.6223_6228dupCAGCAG	p.Gln2075_Gln2076dup	conservative_inframe_insertion	Exon 42 of 45	1	NM_005120.3	ENSP00000363193.3

Frequencies

GnomAD3 genomes

AF:

0.000182

AC:

AN:

109909

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000662

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:

0.000343

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000190

AC:

AN:

168423

AF XY:

0.000101

show subpopulations

Gnomad AFR exome

AF:

0.0000853

Gnomad AMR exome

AF:

0.0000762

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000773

Gnomad FIN exome

AF:

0.0000740

Gnomad NFE exome

AF:

0.000335

Gnomad OTH exome

AF:

0.000473

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.000305

AC:

333

AN:

1091813

Hom.:

Cov.:

AF XY:

0.000159

AC XY:

AN XY:

359025

show subpopulations

African (AFR)

AF:

0.000152

AC:

AN:

26292

American (AMR)

AF:

0.0000570

AC:

AN:

35090

Ashkenazi Jewish (ASJ)

AF:

0.0000519

AC:

AN:

19274

East Asian (EAS)

AF:

0.0000664

AC:

AN:

30106

South Asian (SAS)

AF:

0.00

AC:

AN:

53834

European-Finnish (FIN)

AF:

0.0000509

AC:

AN:

39297

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4117

European-Non Finnish (NFE)

AF:

0.000376

AC:

315

AN:

837965

Other (OTH)

AF:

0.000153

AC:

AN:

45838

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.454

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000182

AC:

AN:

109909

Hom.:

Cov.:

AF XY:

0.0000923

AC XY:

AN XY:

32501

show subpopulations

African (AFR)

AF:

0.0000662

AC:

AN:

30218

American (AMR)

AF:

0.00

AC:

AN:

10275

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2618

East Asian (EAS)

AF:

0.00

AC:

AN:

3492

South Asian (SAS)

AF:

0.00

AC:

AN:

2585

European-Finnish (FIN)

AF:

0.00

AC:

AN:

5889

Middle Eastern (MID)

AF:

0.00

AC:

AN:

225

European-Non Finnish (NFE)

AF:

0.000343

AC:

AN:

52464

Other (OTH)

AF:

0.00

AC:

AN:

1465

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.540

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1Benign:1

Jul 28, 2016

Eurofins Ntd Llc (ga)

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Apr 03, 2025

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: MED12 c.6223_6228dupCAGCAG (p.Gln2075_Gln2076dup) results in an in-frame duplication that is predicted to duplicate *** amino acids into the encoded protein. The variant allele was found at a frequency of 0.00019 in 168423 control chromosomes. This frequency is not significantly higher than estimated for a pathogenic variant in MED12 causing MED12-Related Disorders, allowing no conclusion about variant significance. To our knowledge, no occurrence of c.6223_6228dupCAGCAG in individuals affected with MED12-Related Disorders and no experimental evidence demonstrating its impact on protein function have been reported. ClinVar contains an entry for this variant (Variation ID: 213619). Based on the evidence outlined above, the variant was classified as uncertain significance. -

History of neurodevelopmental disorder

Uncertain:1

Dec 16, 2010

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Familial thoracic aortic aneurysm and aortic dissection

Benign:1

Apr 28, 2017

Ambry Genetics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

not provided

Benign:1

May 12, 2022

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

See Variant Classification Assertion Criteria. -

FG syndrome

Benign:1

Jan 27, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

4.4

Mutation Taster

=82/18

polymorphism

(source)

Splicing

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

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over