rs17076894

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_024596.5(MCPH1):c.1738A>G(p.Ser580Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00147 in 1,614,242 control chromosomes in the GnomAD database, including 41 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0077 ( 18 hom., cov: 33)

Exomes 𝑓: 0.00082 ( 23 hom. )

Consequence

MCPH1
NM_024596.5 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:6

Conservation

PhyloP100: -0.304

Publications

11 publications found

Variant links:

Genes affected

MCPH1 (HGNC:6954): (microcephalin 1) This gene encodes a DNA damage response protein. The encoded protein may play a role in G2/M checkpoint arrest via maintenance of inhibitory phosphorylation of cyclin-dependent kinase 1. Mutations in this gene have been associated with primary autosomal recessive microcephaly 1 and premature chromosome condensation syndrome. Alternatively spliced transcript variants have been described. [provided by RefSeq, Feb 2010]

MCPH1 Gene-Disease associations (from GenCC):

microcephaly 1, primary, autosomal recessive
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
microcephaly with intellectual disability
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
autosomal recessive primary microcephaly
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
hereditary breast carcinoma
Inheritance: AD Classification: LIMITED Submitted by: ClinGen
familial ovarian cancer
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

MCPH1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0032406151).

BP6

Variant 8-6445460-A-G is Benign according to our data. Variant chr8-6445460-A-G is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 138185.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 = 0.00774 (1179/152388) while in subpopulation AFR AF = 0.0265 (1101/41588). AF 95% confidence interval is 0.0252. There are 18 homozygotes in GnomAd4. There are 553 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 18 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MCPH1	NM_024596.5 link	c.1738A>G	p.Ser580Gly	missense_variant	Exon 8 of 14	ENST00000344683.10	NP_078872.3	Q8NEM0-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MCPH1	ENST00000344683.10 link	c.1738A>G	p.Ser580Gly	missense_variant	Exon 8 of 14	1	NM_024596.5	ENSP00000342924.5		Q8NEM0-1

Frequencies

GnomAD3 genomes

AF:

0.00774

AC:

1178

AN:

152270

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0265

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00366

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.00813

GnomAD2 exomes

AF:

0.00223

AC:

555

AN:

249006

AF XY:

0.00168

show subpopulations

Gnomad AFR exome

AF:

0.0309

Gnomad AMR exome

AF:

0.00203

Gnomad ASJ exome

AF:

0.0000995

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000177

Gnomad OTH exome

AF:

0.000828

GnomAD4 exome

AF:

0.000819

AC:

1197

AN:

1461854

Hom.:

Cov.:

AF XY:

0.000668

AC XY:

486

AN XY:

727226

show subpopulations

African (AFR)

AF:

0.0284

AC:

951

AN:

33474

American (AMR)

AF:

0.00195

AC:

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.0000383

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000580

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53394

Middle Eastern (MID)

AF:

0.00104

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000216

AC:

AN:

1112008

Other (OTH)

AF:

0.00204

AC:

123

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.488

Heterozygous variant carriers

142

214

285

356

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

102

136

170

<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:

0.00774

AC:

1179

AN:

152388

Hom.:

Cov.:

AF XY:

0.00742

AC XY:

553

AN XY:

74520

show subpopulations

African (AFR)

AF:

0.0265

AC:

1101

AN:

41588

American (AMR)

AF:

0.00366

AC:

AN:

15312

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5192

South Asian (SAS)

AF:

0.000207

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10632

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000588

AC:

AN:

68044

Other (OTH)

AF:

0.00804

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.506

Heterozygous variant carriers

114

171

228

285

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00353

Hom.:

Bravo

AF:

0.00984

ESP6500AA

AF:

0.0245

AC:

ESP6500EA

AF:

0.000122

AC:

ExAC

AF:

0.00274

AC:

331

Asia WGS

AF:

0.00173

AC:

AN:

3478

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:3

Oct 21, 2024

Athena Diagnostics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Apr 28, 2014

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Mar 04, 2013

Genetic Services Laboratory, University of Chicago

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:2

Jan 27, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Apr 27, 2017

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Microcephaly 1, primary, autosomal recessive

Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.067

BayesDel_addAF

Benign

-0.67

BayesDel_noAF

Benign

-0.72

CADD

Benign

5.2

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.11

T;.;.

Eigen

Benign

-0.53

Eigen_PC

Benign

-0.76

FATHMM_MKL

Benign

0.030

MetaRNN

Benign

0.0032

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

2.0

M;M;.

PhyloP100

-0.30

PrimateAI

Benign

0.24

PROVEAN

Benign

-1.4

N;N;N

REVEL

Benign

0.048

Sift

Uncertain

0.012

D;T;T

Sift4G

Benign

0.12

T;T;T

Polyphen

0.91

P;.;.

Vest4

0.10

MVP

0.46

ClinPred

0.0085

GERP RS

-2.1

Varity_R

0.030

gMVP

0.072

Mutation Taster

=98/2

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over