Genetic Variant MCMDC2:p.Val367Val (chr8-66890892-C-A) – ACMG Classification: Benign (-21 pts)

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_173518.5(MCMDC2):c.1101C>A(p.Val367Val) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000838 in 1,611,698 control chromosomes in the GnomAD database, including 18 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.0044 ( 9 hom., cov: 32)

Exomes 𝑓: 0.00046 ( 9 hom. )

Consequence

MCMDC2
NM_173518.5 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: -0.0510

Variant links:

Genes affected

MCMDC2 (HGNC:26368): (minichromosome maintenance domain containing 2) Predicted to enable ATP binding activity and DNA binding activity. Predicted to be involved in double-strand break repair via break-induced replication. Predicted to act upstream of or within gamete generation and meiosis I cell cycle process. [provided by Alliance of Genome Resources, Apr 2022]

MCMDC2 links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.67).

BP6

Variant 8-66890892-C-A is Benign according to our data. Variant chr8-66890892-C-A is described in ClinVar as [Benign]. Clinvar id is 789601.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-0.051 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. gnomad4_exome allele frequency = 0.000463 (676/1459572) while in subpopulation AFR AF= 0.0165 (552/33364). AF 95% confidence interval is 0.0154. There are 9 homozygotes in gnomad4_exome. There are 291 alleles in male gnomad4_exome subpopulation. Median coverage is 31. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 9 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MCMDC2	NM_173518.5 link	c.1101C>A	p.Val367Val	synonymous_variant	Exon 10 of 15	ENST00000422365.7	NP_775789.3	Q4G0Z9-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MCMDC2	ENST00000422365.7 link	c.1101C>A	p.Val367Val	synonymous_variant	Exon 10 of 15	2	NM_173518.5	ENSP00000413632.2		Q4G0Z9-1

Frequencies

GnomAD3 genomes

AF:

0.00438

AC:

666

AN:

152008

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0153

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00210

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:

0.0000147

Gnomad OTH

AF:

0.000956

GnomAD3 exomes

AF:

0.00103

AC:

257

AN:

249116

Hom.:

AF XY:

0.000691

AC XY:

AN XY:

134560

show subpopulations

Gnomad AFR exome

AF:

0.0139

Gnomad AMR exome

AF:

0.000852

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000337

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000494

GnomAD4 exome

AF:

0.000463

AC:

676

AN:

1459572

Hom.:

Cov.:

AF XY:

0.000401

AC XY:

291

AN XY:

725852

show subpopulations

Gnomad4 AFR exome

AF:

0.0165

Gnomad4 AMR exome

AF:

0.00102

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000352

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000450

Gnomad4 OTH exome

AF:

0.00116

GnomAD4 genome

AF:

0.00443

AC:

674

AN:

152126

Hom.:

Cov.:

AF XY:

0.00405

AC XY:

301

AN XY:

74366

show subpopulations

Gnomad4 AFR

AF:

0.0154

Gnomad4 AMR

AF:

0.00209

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.000946

Alfa

AF:

0.000259

Hom.:

Bravo

AF:

0.00515

Asia WGS

AF:

0.00202

AC:

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Dec 31, 2019

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

BayesDel_noAF

Benign

-0.67

CADD

Benign

2.0

DANN

Benign

0.41

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over