NM_000143.4:c.122C>G

Variant names:

• chr1-241519601-G-C
• NM_000143.4:c.122C>G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000143.4(FH):​c.122C>G​(p.Ala41Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000717 in 1,395,268 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A41V) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
• Consequence: FH NM_000143.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.51

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 Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.24025744).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FH	NM_000143.4	c.122C>G	p.Ala41Gly	missense_variant	Exon 1 of 10	ENST00000366560.4	NP_000134.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FH	ENST00000366560.4	c.122C>G	p.Ala41Gly	missense_variant	Exon 1 of 10	1	NM_000143.4	ENSP00000355518.4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 7.17e-7 AC: 1 AN: 1395268 Hom.: 0 Cov.: 31 AF XY: 0.00000145 AC XY: 1 AN XY: 688146

Gnomad4 AFR exome AF: 0.00

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: 9.27e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.080
BayesDel_addAF	Uncertain	0.084	D
BayesDel_noAF	Benign	-0.12
CADD	Benign	18
DANN	Uncertain	0.97
DEOGEN2	Benign	0.27	T
Eigen	Benign	-0.71
Eigen_PC	Benign	-0.60
FATHMM_MKL	Benign	0.35	N
LIST_S2	Benign	0.64	T
M_CAP	Pathogenic	0.84	D
MetaRNN	Benign	0.24	T
MetaSVM	Uncertain	0.75	D
MutationAssessor	Benign	0.0	N
PrimateAI	Benign	0.46	T
PROVEAN	Benign	-0.89	N
REVEL	Uncertain	0.35
Sift	Benign	0.13	T
Sift4G	Benign	0.28	T
Polyphen		0.012	B
Vest4		0.26
MutPred		0.13		Loss of glycosylation at P39 (P = 0.1081);
MVP		0.91
MPC		0.29
ClinPred		0.15	T
GERP RS		3.3
Varity_R		0.067
gMVP		0.37

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: chr1-241682901;