rs144892223

Positions:

• chr19-49829898-T-A
• chr19-49829898-T-C
• chr19-49829898-T-G

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_030973.4(MED25):​c.638T>A​(p.Val213Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic 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. V213A) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MED25 NM_030973.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.94

Genes affected

MED25 (HGNC:28845): (mediator complex subunit 25) This gene encodes a component of the transcriptional coactivator complex termed the Mediator complex. This complex is required for transcription of most RNA polymerase II-dependent genes. The encoded protein plays a role in chromatin modification and in preinitiation complex assembly. Mutations in this gene are associated with Charcot-Marie-Tooth disease type 2B2. [provided by RefSeq, Apr 2010]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: BayesDel_addAF computational evidence supports a deleterious effect, 0.461

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MED25	NM_030973.4	c.638T>A	p.Val213Glu	missense_variant	6/18	ENST00000312865.10
MED25	NM_001378355.1	c.638T>A	p.Val213Glu	missense_variant	6/18

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MED25	ENST00000312865.10	c.638T>A	p.Val213Glu	missense_variant	6/18	1	NM_030973.4
MED25	ENST00000595185.5	c.638T>A	p.Val213Glu	missense_variant	6/7	1
MED25	ENST00000538643.5	c.181-613T>A		intron_variant		1
MED25	ENST00000593767.3	c.638T>A	p.Val213Glu	missense_variant	6/18	3		P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.62
BayesDel_addAF	Pathogenic	0.46	D
BayesDel_noAF	Benign	-0.15
CADD	Uncertain	24
DANN	Uncertain	0.99
Eigen	Uncertain	0.31
Eigen_PC	Uncertain	0.39
FATHMM_MKL	Benign	0.70	D
M_CAP	Uncertain	0.25	D
MutationTaster	Benign	0.97	D;D
Vest4		0.72
ClinPred		0.80	D
GERP RS		5.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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

Other links and lift over

dbSNP: rs144892223; hg19: chr19-50333155;