rs574703435

Positions:

• chr19-49832166-C-T

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 2P and 16B. PM2 BP4_Strong BP6_Very_Strong BS1

The NM_030973.4(MED25):​c.1374+9C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000141 in 1,611,638 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.00083 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000069 (0 hom.)
• Consequence: MED25 NM_030973.4 intron
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -4.65

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 Benign. Variant got -14 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).
• BP6: Variant 19-49832166-C-T is Benign according to our data. Variant chr19-49832166-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 543262.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000834 (127/152294) while in subpopulation AFR AF= 0.00298 (124/41556). AF 95% confidence interval is 0.00256. There are 0 homozygotes in gnomad4. There are 51 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MED25	NM_030973.4	c.1374+9C>T		intron_variant		ENST00000312865.10
MED25	NM_001378355.1	c.1374+9C>T		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MED25	ENST00000312865.10	c.1374+9C>T		intron_variant		1	NM_030973.4

Frequencies

GnomAD3 genomes AF: 0.000821 AC: 125 AN: 152176 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00294

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

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: 0.00

Gnomad OTH AF: 0.000478

GnomAD3 exomes AF: 0.000215 AC: 53 AN: 246936 Hom.: 0 AF XY: 0.000149 AC XY: 20 AN XY: 134250

Gnomad AFR exome AF: 0.00319

Gnomad AMR exome AF: 0.0000581

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000328

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000685 AC: 100 AN: 1459344 Hom.: 0 Cov.: 35 AF XY: 0.0000606 AC XY: 44 AN XY: 725928

Gnomad4 AFR exome AF: 0.00251

Gnomad4 AMR exome AF: 0.0000448

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000232

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000360

Gnomad4 OTH exome AF: 0.000133

GnomAD4 genome AF: 0.000834 AC: 127 AN: 152294 Hom.: 0 Cov.: 32 AF XY: 0.000685 AC XY: 51 AN XY: 74468

Gnomad4 AFR AF: 0.00298

Gnomad4 AMR AF: 0.000131

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.000473

Alfa AF: 0.000814 Hom.: 0

Bravo AF: 0.000933

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Charcot-Marie-Tooth disease Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Molecular Genetics Laboratory, London Health Sciences Centre

-

- -

Charcot-Marie-Tooth disease type 2 Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Dec 29, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
CADD	Benign	0.22
DANN	Benign	0.62
RBP_binding_hub_radar		0.77
RBP_regulation_power_radar		1.9

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

LitVar

Other links and lift over

dbSNP: rs574703435; hg19: chr19-50335423;