17-10419016-C-G

Position:

chr17-10419016-C-G

Variant summary

Our verdict is Benign. Variant got -15 ACMG points: 1P and 16B. PP2BP4_StrongBP6_Very_StrongBS2

The NM_002472.3(MYH8):c.225G>C(p.Arg75Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000388 in 1,613,998 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.0019 ( 2 hom., cov: 32)

Exomes 𝑓: 0.00023 ( 1 hom. )

Consequence

MYH8
NM_002472.3 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: 0.387

Variant links:

Genes affected

MYH8 (HGNC:7578): (myosin heavy chain 8) Myosins are actin-based motor proteins that function in the generation of mechanical force in eukaryotic cells. Muscle myosins are heterohexamers composed of 2 myosin heavy chains and 2 pairs of nonidentical myosin light chains. This gene encodes a member of the class II or conventional myosin heavy chains, and functions in skeletal muscle contraction. This gene is predominantly expressed in fetal skeletal muscle. This gene is found in a cluster of myosin heavy chain genes on chromosome 17. A mutation in this gene results in trismus-pseudocamptodactyly syndrome. [provided by RefSeq, Sep 2009]

MYH8 links:

(HGNC:):

links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -15 ACMG points.

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), MYH8. . Gene score misZ 0.34953 (greater than the threshold 3.09). Trascript score misZ 3.2125 (greater than threshold 3.09). GenCC has associacion of gene with trismus-pseudocamptodactyly syndrome, Carney complex - trismus - pseudocamptodactyly syndrome.

BP4

Computational evidence support a benign effect (MetaRNN=0.006001532).

BP6

Variant 17-10419016-C-G is Benign according to our data. Variant chr17-10419016-C-G is described in ClinVar as [Benign]. Clinvar id is 258716.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS2

High AC in GnomAd4 at 294 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MYH8	NM_002472.3 linkuse as main transcript	c.225G>C	p.Arg75Ser	missense_variant	4/40	ENST00000403437.2	NP_002463.2
MYHAS	NR_125367.1 linkuse as main transcript	n.167+12778C>G		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris
MYH8	ENST00000403437.2 linkuse as main transcript	c.225G>C	p.Arg75Ser	missense_variant	4/40	5	NM_002472.3	ENSP00000384330	P1
	ENST00000399342.6 linkuse as main transcript	n.206+12739C>G		intron_variant, non_coding_transcript_variant		3
	ENST00000581304.1 linkuse as main transcript	n.143+12778C>G		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes

AF:

0.00192

AC:

292

AN:

151994

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00660

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000917

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:

0.0000294

Gnomad OTH

AF:

0.00143

GnomAD3 exomes

AF:

0.000545

AC:

137

AN:

251356

Hom.:

AF XY:

0.000398

AC XY:

AN XY:

135846

show subpopulations

Gnomad AFR exome

AF:

0.00726

Gnomad AMR exome

AF:

0.000549

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000228

AC:

333

AN:

1461886

Hom.:

Cov.:

AF XY:

0.000188

AC XY:

137

AN XY:

727244

show subpopulations

Gnomad4 AFR exome

AF:

0.00783

Gnomad4 AMR exome

AF:

0.000559

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000450

Gnomad4 OTH exome

AF:

0.000613

GnomAD4 genome

AF:

0.00193

AC:

294

AN:

152112

Hom.:

Cov.:

AF XY:

0.00186

AC XY:

138

AN XY:

74368

show subpopulations

Gnomad4 AFR

AF:

0.00663

Gnomad4 AMR

AF:

0.000916

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00142

Alfa

AF:

0.000354

Hom.:

Bravo

AF:

0.00208

ESP6500AA

AF:

0.00908

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000593

AC:

ClinVar

Significance: Benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Aug 16, 2018	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Nov 18, 2020	- -

MYH8-related disorder

Benign:1

Benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jul 28, 2021

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

Hecht syndrome

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 27, 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 was too high to be consistent with this variant causing disease. Therefore, this variant is classified as benign. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.27

BayesDel_addAF

Benign

-0.42

BayesDel_noAF

Benign

-0.37

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.33

Eigen

Benign

-0.70

Eigen_PC

Benign

-0.65

FATHMM_MKL

Uncertain

0.94

LIST_S2

Benign

0.76

M_CAP

Benign

0.073

MetaRNN

Benign

0.0060

MetaSVM

Benign

-0.70

MutationAssessor

Benign

1.4

MutationTaster

Benign

0.68

PrimateAI

Benign

0.40

PROVEAN

Benign

-1.7

REVEL

Benign

0.20

Sift

Uncertain

0.0010

Sift4G

Benign

0.095

Polyphen

0.0050

Vest4

0.28

MutPred

0.46

Gain of disorder (P = 0.061);

MVP

0.53

MPC

0.20

ClinPred

0.036

GERP RS

-0.097

Varity_R

0.27

gMVP

0.27

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