Genetic Variant MCPH1-DT:n.86C>G (chr8-6406495-G-C) – ACMG Classification: Likely_benign (-6 pts)

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 0P and 6B. BP4_StrongBP6_Moderate

The ENST00000500118.5(MCPH1-DT):n.86C>G variant causes a non coding transcript exon change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00107 in 657,694 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.0035 ( 1 hom., cov: 34)

Exomes 𝑓: 0.00035 ( 1 hom. )

Consequence

MCPH1-DT
ENST00000500118.5 non_coding_transcript_exon

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: -1.47

Publications

0 publications found

Variant links:

Genes affected

MCPH1-DT (HGNC:55599): (MCPH1 divergent transcript)

MCPH1-DT links:

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: Likely_benign. The variant received -6 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.78).

BP6

Variant 8-6406495-G-C is Benign according to our data. Variant chr8-6406495-G-C is described in ClinVar as [Likely_benign]. Clinvar id is 1219030.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MCPH1	NM_024596.5 link	c.-173G>C		upstream_gene_variant		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.-173G>C		upstream_gene_variant		1	NM_024596.5	ENSP00000342924.5		Q8NEM0-1

Frequencies

GnomAD3 genomes

AF:

0.00348

AC:

529

AN:

152142

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0124

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000392

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00239

GnomAD4 exome

AF:

0.000350

AC:

177

AN:

505434

Hom.:

Cov.:

AF XY:

0.000297

AC XY:

AN XY:

263002

show subpopulations

African (AFR)

AF:

0.0141

AC:

143

AN:

10174

American (AMR)

AF:

0.000545

AC:

AN:

14666

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

12780

East Asian (EAS)

AF:

0.00

AC:

AN:

27028

South Asian (SAS)

AF:

0.0000694

AC:

AN:

43230

European-Finnish (FIN)

AF:

0.00

AC:

AN:

29760

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2010

European-Non Finnish (NFE)

AF:

0.00000295

AC:

AN:

338634

Other (OTH)

AF:

0.000810

AC:

AN:

27152

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.494

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00348

AC:

530

AN:

152260

Hom.:

Cov.:

AF XY:

0.00324

AC XY:

241

AN XY:

74458

show subpopulations

African (AFR)

AF:

0.0124

AC:

515

AN:

41574

American (AMR)

AF:

0.000392

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5160

South Asian (SAS)

AF:

0.000207

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.0000441

AC:

AN:

67988

Other (OTH)

AF:

0.00237

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.498

Heterozygous variant carriers

118

148

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.000209

Hom.:

Bravo

AF:

0.00380

Asia WGS

AF:

0.000866

AC:

AN:

3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Benign:1

Jul 03, 2018

GeneDx

Significance:Likely 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

-0.78

CADD

Benign

0.23

(source)

DANN

Benign

0.52

PhyloP100

-1.5

PromoterAI

0.10

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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8-6406495-G-C

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