rs863223966

chr1-241504057-T-C

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PM1 PM2 PM5 PP3_Strong PP5_Very_Strong

The NM_000143.4(FH):c.1093A>G(p.Ser365Gly) variant causes a missense change. The variant allele was found at a frequency of 0.00000186 in 1,614,014 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S365N) has been classified as Likely pathogenic.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: FH NM_000143.4 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:6
• Conservation: PhyloP100: 5.63

Genes affected

FH (HGNC:3700): (fumarate hydratase) The protein encoded by this gene is an enzymatic component of the tricarboxylic acid (TCA) cycle, or Krebs cycle, and catalyzes the formation of L-malate from fumarate. It exists in both a cytosolic form and an N-terminal extended form, differing only in the translation start site used. The N-terminal extended form is targeted to the mitochondrion, where the removal of the extension generates the same form as in the cytoplasm. It is similar to some thermostable class II fumarases and functions as a homotetramer. Mutations in this gene can cause fumarase deficiency and lead to progressive encephalopathy. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Pathogenic. Variant got 18 ACMG points.

• PM1: In a hotspot region, there are 8 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 6 uncertain in NM_000143.4
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr1-241504056-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 429174.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.942
• PP5: Variant 1-241504057-T-C is Pathogenic according to our data. Variant chr1-241504057-T-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 214374.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FH	NM_000143.4	c.1093A>G	p.Ser365Gly	missense_variant	7/10	ENST00000366560.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FH	ENST00000366560.4	c.1093A>G	p.Ser365Gly	missense_variant	7/10	1	NM_000143.4	P1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152246 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461768 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727170

Gnomad4 AFR exome AF: 0.0000597

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152246 Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1 AN XY: 74382

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00

Bravo AF: 0.00000378

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:6

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Hereditary leiomyomatosis and renal cell cancer Pathogenic:3

Pathogenic, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Aug 01, 2023	Variant summary: FH c.1093A>G (p.Ser365Gly) results in a non-conservative amino acid change located in the Fumarate lyase, N-terminal domain (IPR022761) of the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant was absent in 251080 control chromosomes (gnomAD). c.1093A>G has been reported in the literature in multiple individuals affected with Hereditary Leiomyomatosis And Renal Cell Cancer (examples: Toro_2003, Wei_2006, Mitchum_2012, Arora_2012, Muller_2017, Abou_2021). These data indicate that the variant is very likely to be associated with disease. The following publications have been ascertained in the context of this evaluation (PMID: 33789101, 22565324, 12772087, 15937070, 28300276, 22243733 ). Different variant affecting the same codon has been classified pathogenic in ClinVar (c.1094G>A /p.Ser365Asn, CV ID 429174 ). Four submitters have cited clinical-significance assessments for this variant to ClinVar after 2014. All submitters classified the variant as pathogenic. Based on the evidence outlined above, the variant was classified as pathogenic. -
Pathogenic, criteria provided, single submitter	clinical testing	Genomic Diagnostic Laboratory, Division of Genomic Diagnostics, Children's Hospital of Philadelphia	Jan 17, 2017	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Myriad Genetics, Inc.	Jan 17, 2024	This variant is considered likely pathogenic. This variant has been reported in multiple individuals with clinical features of gene-specific disease [PMID: 22565324, 12772087, 15937070, 28300276, 33789101]. This variant is expected to disrupt protein structure [Myriad internal data]. -

not provided Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Dec 13, 2022	In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 18366737, 27784735, 21445611, 16597677, 16237213, 15937070, 22565324, 22243733, 12772087, 28300276) -
Pathogenic, criteria provided, single submitter	clinical testing	Invitae	Oct 07, 2023	This sequence change replaces serine, which is neutral and polar, with glycine, which is neutral and non-polar, at codon 365 of the FH protein (p.Ser365Gly). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individuals with hereditary leiomyomatosis and renal cell carcinoma (HLRCC) (PMID: 12772087, 22243733, 22565324; Invitae). This variant is also known as A964G (S322G). ClinVar contains an entry for this variant (Variation ID: 214374). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt FH protein function. For these reasons, this variant has been classified as Pathogenic. -

Hereditary cancer-predisposing syndrome Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 30, 2023

The p.S365G pathogenic mutation (also known as c.1093A>G), located in coding exon 7 of the FH gene, results from an A to G substitution at nucleotide position 1093. The serine at codon 365 is replaced by glycine, an amino acid with similar properties. This alteration (referred to as p.S322G) has been reported in multiple individuals diagnosed with hereditary leiomyomatosis and renal cell carcinoma (HLRCC) (Toro J et al. Am J Hum Genet. 2003 Jul;73(1):95-106; Wei M et al. J Med Genet. 2006 Jan;43(1):18-27). In addition, this variant is located within the gene active site, a region where mutations have been known to cluster and are predicted to affect the activity of the FH protein (Picaud S et al. J Inherit Metab Dis. 2011 Jun;34(3):671-6; Pithukpakorn M et al. J Med Genet. 2006 Sep;43(9):755-62). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Based on internal structural analysis, this variant disrupts a specific protein-ligand interaction involved with fumarate-binding and protein function (Ambry internal data; Pereira de Pádua RA et al. Acta Crystallogr F Struct Biol Commun. 2014 Jan;70:120-2; Mechaly AE et al. FEBS Lett. 2012 Jun;586:1606-11). Based on the supporting evidence, this alteration is interpreted as a disease-causing mutation. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.56	D
BayesDel_noAF	Pathogenic	0.57
Cadd	Pathogenic	30
Dann	Uncertain	1.0
DEOGEN2	Pathogenic	1.0	D
Eigen	Pathogenic	1.0
Eigen_PC	Pathogenic	0.91
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Pathogenic	0.75	D
MetaRNN	Pathogenic	0.94	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	5.1	H
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.75	T
PROVEAN	Uncertain	-4.0	D
REVEL	Pathogenic	0.85
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.95
MutPred		0.61		Loss of phosphorylation at S365 (P = 0.0335);
MVP		0.98
MPC		0.66
ClinPred		1.0	D
GERP RS		5.7
Varity_R		0.95
gMVP		0.98

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

Other links and lift over

dbSNP: rs863223966; hg19: chr1-241667357;