rs77959215

Positions:

chr8-6445071-A-C

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The ENST00000344683.10(MCPH1):c.1349A>C(p.Lys450Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000308 in 1,614,274 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0015 ( 1 hom., cov: 33)

Exomes 𝑓: 0.00018 ( 2 hom. )

Consequence

MCPH1
ENST00000344683.10 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:4

Conservation

PhyloP100: -0.135

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0028072).

BP6

Variant 8-6445071-A-C is Benign according to our data. Variant chr8-6445071-A-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 499746.We mark this variant Likely_benign, oryginal submissions are: {Benign=1, Likely_benign=2, Uncertain_significance=2}. Variant chr8-6445071-A-C is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00152 (231/152386) while in subpopulation AFR AF= 0.00519 (216/41598). AF 95% confidence interval is 0.00463. There are 1 homozygotes in gnomad4. There are 107 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MCPH1	NM_024596.5 linkuse as main transcript	c.1349A>C	p.Lys450Thr	missense_variant	8/14	ENST00000344683.10	NP_078872.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MCPH1	ENST00000344683.10 linkuse as main transcript	c.1349A>C	p.Lys450Thr	missense_variant	8/14	1	NM_024596.5	ENSP00000342924	P1	Q8NEM0-1

Frequencies

GnomAD3 genomes

AF:

0.00151

AC:

230

AN:

152268

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00518

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000941

Gnomad MID

AF:

0.0158

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000293

AC:

AN:

249500

Hom.:

AF XY:

0.000177

AC XY:

AN XY:

135378

show subpopulations

Gnomad AFR exome

AF:

0.00375

Gnomad AMR exome

AF:

0.000203

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000464

Gnomad NFE exome

AF:

0.0000530

Gnomad OTH exome

AF:

0.000165

GnomAD4 exome

AF:

0.000183

AC:

267

AN:

1461888

Hom.:

Cov.:

AF XY:

0.000143

AC XY:

104

AN XY:

727246

show subpopulations

Gnomad4 AFR exome

AF:

0.00502

Gnomad4 AMR exome

AF:

0.000201

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.0000495

Gnomad4 OTH exome

AF:

0.000430

GnomAD4 genome

AF:

0.00152

AC:

231

AN:

152386

Hom.:

Cov.:

AF XY:

0.00144

AC XY:

107

AN XY:

74526

show subpopulations

Gnomad4 AFR

AF:

0.00519

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000941

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000320

Hom.:

Bravo

AF:

0.00170

ESP6500AA

AF:

0.00504

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000405

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.000119

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:2

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 24, 2024	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jan 26, 2017	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	May 01, 2023	MCPH1: BP4 -

Microcephaly 1, primary, autosomal recessive

Uncertain:1Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Oct 31, 2018	- -
Likely benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Apr 28, 2017	This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

MCPH1-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Sep 07, 2022

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.087

BayesDel_addAF

Benign

-0.66

BayesDel_noAF

Benign

-0.72

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.090

T;.;.

Eigen

Benign

-0.91

Eigen_PC

Benign

-0.94

FATHMM_MKL

Benign

0.050

M_CAP

Benign

0.0054

MetaRNN

Benign

0.0028

T;T;T

MetaSVM

Benign

-0.95

MutationAssessor

Benign

1.1

L;L;.

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Benign

0.23

PROVEAN

Benign

-1.2

N;N;N

REVEL

Benign

0.034

Sift

Benign

0.19

T;T;T

Sift4G

Benign

0.25

T;T;T

Polyphen

0.020

B;.;.

Vest4

0.091

MVP

0.25

ClinPred

0.012

GERP RS

-2.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.039

gMVP

0.21

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