chr18-36355545-G-C

Position:

• chr18-36355545-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_001281740.3(FHOD3):​c.172G>C​(p.Asp58His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: FHOD3 NM_001281740.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 10.0

Genes affected

FHOD3 (HGNC:26178): (formin homology 2 domain containing 3) The protein encoded by this gene is a member of the diaphanous-related formins (DRF), and contains multiple domains, including GBD (GTPase-binding domain), DID (diaphanous inhibitory domain), FH1 (formin homology 1), FH2 (formin homology 2), and DAD (diaphanous auto-regulatory domain) domains. This protein is thought to play a role in actin filament polymerization in cardiomyocytes. Mutations in this gene have been associated with dilated cardiomyopathy (DCM), characterized by dilation of the ventricular chamber, leading to impairment of systolic pump function and subsequent heart failure. Increased levels of the protein encoded by this gene have been observed in individuals with hypertrophic cardiomyopathy (HCM). Alternative splicing results in multiple transcript variants encoding different isoforms. A muscle-specific isoform has been shown to possess a casein kinase 2 (CK2) phosphorylation site at the C-terminal end of the FH2 domain. Phosphorylation of this site alters its interaction with sequestosome 1 (SQSTM1), and targets this isoform to myofibrils, while other isoforms form cytoplasmic aggregates. [provided by RefSeq, Aug 2015]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.781

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FHOD3	NM_001281740.3	c.172G>C	p.Asp58His	missense_variant	2/29	ENST00000590592.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FHOD3	ENST00000590592.6	c.172G>C	p.Asp58His	missense_variant	2/29	1	NM_001281740.3	A2
FHOD3	ENST00000257209.8	c.172G>C	p.Asp58His	missense_variant	2/25	1		P4
FHOD3	ENST00000359247.8	c.172G>C	p.Asp58His	missense_variant	2/24	1		A2
FHOD3	ENST00000589114.5	n.291G>C		non_coding_transcript_exon_variant	2/14	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Cardiomyopathy, familial hypertrophic, 28 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory of Medical Genetics, National & Kapodistrian University of Athens

Feb 08, 2022

PM2, PP3, BP1 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.89
BayesDel_addAF	Pathogenic	0.25	D
BayesDel_noAF	Uncertain	0.12
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.34	.;.;T
Eigen	Pathogenic	0.84
Eigen_PC	Pathogenic	0.87
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.96	D;D;D
M_CAP	Benign	0.014	T
MetaRNN	Pathogenic	0.78	D;D;D
MetaSVM	Benign	-0.82	T
MutationAssessor	Uncertain	2.6	M;M;M
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.91	D
PROVEAN	Pathogenic	-5.1	D;.;D
REVEL	Uncertain	0.48
Sift	Uncertain	0.0060	D;.;D
Sift4G	Uncertain	0.037	D;D;D
Polyphen		1.0	D;.;D
Vest4		0.94
MutPred		0.48		Gain of catalytic residue at C59 (P = 0.1006);Gain of catalytic residue at C59 (P = 0.1006);Gain of catalytic residue at C59 (P = 0.1006);
MVP		0.63
MPC		2.8
ClinPred		0.99	D
GERP RS		6.1
Varity_R		0.66
gMVP		0.69

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr18-33935508;