Variant 3-127599531-G-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_004526.4(MCM2):c.220G>A(p.Gly74Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,460,964 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

MCM2
NM_004526.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 9.33

Variant links:

Genes affected

MCM2 (HGNC:6944): (minichromosome maintenance complex component 2) The protein encoded by this gene is one of the highly conserved mini-chromosome maintenance proteins (MCM) that are involved in the initiation of eukaryotic genome replication. The hexameric protein complex formed by MCM proteins is a key component of the pre-replication complex (pre_RC) and may be involved in the formation of replication forks and in the recruitment of other DNA replication related proteins. This protein forms a complex with MCM4, 6, and 7, and has been shown to regulate the helicase activity of the complex. This protein is phosphorylated, and thus regulated by, protein kinases CDC2 and CDC7. Multiple alternatively spliced transcript variants have been found, but the full-length nature of some variants has not been defined. [provided by RefSeq, Oct 2012]

MCM2 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
MCM2	NM_004526.4 linkuse as main transcript	c.220G>A	p.Gly74Arg	missense_variant	2/16	ENST00000265056.12
MCM2	XM_024453531.2 linkuse as main transcript	c.193G>A	p.Gly65Arg	missense_variant	2/16
MCM2	NR_073375.2 linkuse as main transcript	n.276G>A		non_coding_transcript_exon_variant	2/16

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MCM2	ENST00000265056.12 linkuse as main transcript	c.220G>A	p.Gly74Arg	missense_variant	2/16	1	NM_004526.4	P1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1460964

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726682

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

9.00e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 21, 2022

The c.220G>A (p.G74R) alteration is located in exon 2 (coding exon 2) of the MCM2 gene. This alteration results from a G to A substitution at nucleotide position 220, causing the glycine (G) at amino acid position 74 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.51

BayesDel_addAF

Pathogenic

0.25

BayesDel_noAF

Uncertain

0.12

Cadd

Pathogenic

Dann

Uncertain

1.0

DEOGEN2

Benign

0.27

T;.;T

Eigen

Pathogenic

0.78

Eigen_PC

Pathogenic

0.77

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.97

D;D;D

M_CAP

Benign

0.066

MetaRNN

Uncertain

0.68

D;D;D

MetaSVM

Benign

-0.95

MutationAssessor

Uncertain

2.2

M;.;.

MutationTaster

Benign

1.0

PrimateAI

Pathogenic

0.79

PROVEAN

Pathogenic

-6.1

D;D;D

REVEL

Uncertain

0.47

Sift

Benign

0.091

T;D;D

Sift4G

Benign

0.096

T;D;D

Polyphen

1.0

D;.;.

Vest4

0.86

MutPred

0.30

Gain of helix (P = 0.0117);.;.;

MVP

0.75

MPC

1.3

ClinPred

0.99

GERP RS

5.2

Varity_R

0.87

gMVP

0.56

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

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over