NM_004830.4:c.235C>T

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 1P and 1B. PP2BS1_Supporting

The NM_004830.4(MED23):c.235C>T(p.Leu79Phe) variant causes a missense change. The variant allele was found at a frequency of 0.000216 in 1,613,828 control chromosomes in the GnomAD database, including 1 homozygotes. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00023 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00021 ( 1 hom. )

Consequence

MED23
NM_004830.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 6.86

Publications

2 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, G2P, Labcorp Genetics (formerly Invitae)
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: Uncertain_significance. The variant received 0 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.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.00023 (35/152234) while in subpopulation NFE AF = 0.000426 (29/68004). AF 95% confidence interval is 0.000304. There are 0 homozygotes in GnomAd4. There are 19 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

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.235C>T	p.Leu79Phe	missense	Exon 4 of 29	NP_004821.2
MED23	NM_001376517.1		c.235C>T	p.Leu79Phe	missense	Exon 4 of 30	NP_001363446.1
MED23	NM_015979.4		c.235C>T	p.Leu79Phe	missense	Exon 4 of 31	NP_057063.2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
MED23	ENST00000368068.8	TSL:1 MANE Select	c.235C>T	p.Leu79Phe	missense	Exon 4 of 29	ENSP00000357047.3	Q9ULK4-1
MED23	ENST00000354577.8	TSL:1	c.235C>T	p.Leu79Phe	missense	Exon 4 of 31	ENSP00000346588.4	Q9ULK4-3
MED23	ENST00000368060.7	TSL:1	c.235C>T	p.Leu79Phe	missense	Exon 4 of 30	ENSP00000357039.3	Q9ULK4-5

Frequencies

GnomAD3 genomes

AF:

0.000230

AC:

AN:

152116

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000197

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000426

Gnomad OTH

AF:

0.000478

GnomAD2 exomes

AF:

0.000263

AC:

AN:

251242

AF XY:

0.000353

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000116

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000325

Gnomad OTH exome

AF:

0.00114

GnomAD4 exome

AF:

0.000214

AC:

313

AN:

1461594

Hom.:

Cov.:

AF XY:

0.000235

AC XY:

171

AN XY:

727096

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.0000894

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39670

South Asian (SAS)

AF:

0.000487

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.0000375

AC:

AN:

53268

Middle Eastern (MID)

AF:

0.00607

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.000189

AC:

210

AN:

1111910

Other (OTH)

AF:

0.000331

AC:

AN:

60388

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.474

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

<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:

0.000230

AC:

AN:

152234

Hom.:

Cov.:

AF XY:

0.000255

AC XY:

AN XY:

74438

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41550

American (AMR)

AF:

0.000196

AC:

AN:

15286

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5176

South Asian (SAS)

AF:

0.000207

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10592

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000426

AC:

AN:

68004

Other (OTH)

AF:

0.000473

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.491

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:

0.000246

Hom.:

Bravo

AF:

0.000166

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000581

AC:

ExAC

AF:

0.000346

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000654

EpiControl

AF:

0.000652

ClinVar

ClinVar submissions

Significance:Uncertain significance

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (2)

Intellectual disability, autosomal recessive 18 (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.78

BayesDel_addAF

Uncertain

0.079

BayesDel_noAF

Pathogenic

0.23

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.26

Eigen

Uncertain

0.43

Eigen_PC

Uncertain

0.55

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.97

M_CAP

Benign

0.078

MetaRNN

Uncertain

0.48

MetaSVM

Uncertain

-0.076

MutationAssessor

Benign

0.97

PhyloP100

6.9

PrimateAI

Pathogenic

0.89

PROVEAN

Benign

-1.6

REVEL

Uncertain

0.44

Sift

Benign

0.057

Sift4G

Benign

0.17

Polyphen

0.15

Vest4

0.80

MVP

0.90

MPC

0.65

ClinPred

0.25

GERP RS

5.9

Varity_R

0.50

gMVP

0.82

Mutation Taster

=9/91

disease causing

(source)

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

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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