6-131621924-G-A

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 1P and 6B. PP2BP4_ModerateBS1

The NM_004830.4(MED23):c.452C>T(p.Thr151Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000335 in 1,613,740 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts 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. T151R) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000034 ( 0 hom. )

Consequence

MED23
NM_004830.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 7.80

Publications

4 publications found

Variant links:

Genes affected

MED23 (HGNC:2372): (mediator complex subunit 23) The activation of gene transcription is a multistep process that is triggered by factors that recognize transcriptional enhancer sites in DNA. These factors work with co-activators to direct transcriptional initiation by the RNA polymerase II apparatus. The protein encoded by this gene is a subunit of the CRSP (cofactor required for SP1 activation) complex, which, along with TFIID, is required for efficient activation by SP1. This protein is also a component of other multisubunit complexes e.g. thyroid hormone receptor-(TR-) associated proteins which interact with TR and facilitate TR function on DNA templates in conjunction with initiation factors and cofactors. This protein also acts as a metastasis suppressor. Several alternatively spliced transcript variants encoding different isoforms have been described for this gene. [provided by RefSeq, Jul 2012]

MED23 Gene-Disease associations (from GenCC):

intellectual disability, autosomal recessive 18
Inheritance: AR Classification: STRONG, MODERATE, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
syndromic intellectual disability
Inheritance: AR Classification: MODERATE Submitted by: ClinGen
autosomal recessive non-syndromic intellectual disability
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

MED23 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 9 curated pathogenic missense variants (we use a threshold of 10). The gene has 0 curated benign missense variants. Gene score misZ: 4.7291 (above the threshold of 3.09). Trascript score misZ: 5.9944 (above the threshold of 3.09). GenCC associations: The gene is linked to intellectual disability, autosomal recessive 18, syndromic intellectual disability, autosomal recessive non-syndromic intellectual disability.

BP4

Computational evidence support a benign effect (MetaRNN=0.14974272).

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.0000263 (4/152282) while in subpopulation SAS AF = 0.000829 (4/4824). AF 95% confidence interval is 0.000283. There are 0 homozygotes in GnomAd4. There are 4 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004830.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
MED23	NM_004830.4	MANE Select	c.452C>T	p.Thr151Ile	missense	Exon 6 of 29	NP_004821.2
MED23	NM_001376517.1		c.452C>T	p.Thr151Ile	missense	Exon 6 of 30	NP_001363446.1
MED23	NM_015979.4		c.452C>T	p.Thr151Ile	missense	Exon 6 of 31	NP_057063.2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
MED23	ENST00000368068.8	TSL:1 MANE Select	c.452C>T	p.Thr151Ile	missense	Exon 6 of 29	ENSP00000357047.3
MED23	ENST00000354577.8	TSL:1	c.452C>T	p.Thr151Ile	missense	Exon 6 of 31	ENSP00000346588.4
MED23	ENST00000368060.7	TSL:1	c.452C>T	p.Thr151Ile	missense	Exon 6 of 30	ENSP00000357039.3

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152164

Hom.:

Cov.:

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:

0.000829

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000915

AC:

AN:

251252

AF XY:

0.0000368

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000880

Gnomad OTH exome

AF:

0.000490

GnomAD4 exome

AF:

0.0000342

AC:

AN:

1461458

Hom.:

Cov.:

AF XY:

0.0000344

AC XY:

AN XY:

727048

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33468

American (AMR)

AF:

0.00

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26114

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39662

South Asian (SAS)

AF:

0.000452

AC:

AN:

86226

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53410

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111724

Other (OTH)

AF:

0.000166

AC:

AN:

60372

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.464

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

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

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152282

Hom.:

Cov.:

AF XY:

0.0000537

AC XY:

AN XY:

74462

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41572

American (AMR)

AF:

0.00

AC:

AN:

15298

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5178

South Asian (SAS)

AF:

0.000829

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10600

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68018

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.488

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

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:

0.0000225

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.0000988

AC:

Asia WGS

AF:

0.000866

AC:

AN:

3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.10

BayesDel_noAF

Uncertain

-0.020

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.62

Eigen

Benign

0.036

Eigen_PC

Uncertain

0.28

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.96

M_CAP

Benign

0.033

MetaRNN

Benign

0.15

MetaSVM

Benign

-0.86

MutationAssessor

Benign

-0.34

PhyloP100

7.8

PrimateAI

Pathogenic

0.85

PROVEAN

Uncertain

-2.4

REVEL

Uncertain

0.34

Sift

Benign

0.27

Sift4G

Benign

0.27

Polyphen

0.0050

Vest4

0.59

MutPred

0.23

Loss of helix (P = 0.1299)

MVP

0.71

MPC

0.18

ClinPred

0.11

GERP RS

5.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.23

gMVP

0.42

Mutation Taster

=48/52

disease causing

(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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over