Genetic Variant MCM3:c.400+142T>C (chr6-52282511-A-G) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_002388.6(MCM3):c.400+142T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000115 in 693,614 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000013 ( 0 hom. )

Consequence

MCM3
NM_002388.6 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.793

Publications

3 publications found

Variant links:

Genes affected

MCM3 (HGNC:6945): (minichromosome maintenance complex component 3) 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 is a subunit of the protein complex that consists of MCM2-7. It has been shown to interact directly with MCM5/CDC46. This protein also interacts with and is acetylated by MCM3AP, a chromatin-associated acetyltransferase. The acetylation of this protein inhibits the initiation of DNA replication and cell cycle progression. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2018]

MCM3 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.9).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002388.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
MCM3	NM_002388.6	MANE Select	c.400+142T>C	intron	N/A	NP_002379.4
MCM3	NM_001366369.2		c.400+142T>C	intron	N/A	NP_001353298.1
MCM3	NM_001366370.2		c.400+142T>C	intron	N/A	NP_001353299.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
MCM3	ENST00000596288.7	TSL:1 MANE Select	c.400+142T>C	intron	N/A	ENSP00000472940.2
MCM3	ENST00000616552.4	TSL:1	c.535+142T>C	intron	N/A	ENSP00000480987.1
MCM3	ENST00000229854.12	TSL:1	c.430+142T>C	intron	N/A	ENSP00000229854.6

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

151976

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.00

GnomAD4 exome

AF:

0.0000129

AC:

AN:

541638

Hom.:

AF XY:

0.0000176

AC XY:

AN XY:

284888

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

14700

American (AMR)

AF:

0.00

AC:

AN:

25102

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

15152

East Asian (EAS)

AF:

0.00

AC:

AN:

31790

South Asian (SAS)

AF:

0.00

AC:

AN:

50494

European-Finnish (FIN)

AF:

0.00

AC:

AN:

43488

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2172

European-Non Finnish (NFE)

AF:

0.00000910

AC:

AN:

329656

Other (OTH)

AF:

0.000138

AC:

AN:

29084

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.511

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

AF:

0.00000658

AC:

AN:

151976

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74204

show subpopulations

African (AFR)

AF:

0.0000242

AC:

AN:

41358

American (AMR)

AF:

0.00

AC:

AN:

15266

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5184

South Asian (SAS)

AF:

0.00

AC:

AN:

4816

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10568

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68002

Other (OTH)

AF:

0.00

AC:

AN:

2086

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

3171

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.90

CADD

Benign

0.24

(source)

DANN

Benign

0.54

PhyloP100

-0.79

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

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

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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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over