10-133373329-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 6P and 1B. PM1 PM2 PM5 BP4

The NM_004092.4(ECHS1):c.5C>G(p.Ala2Gly) variant causes a missense change. The variant allele was found at a frequency of 0.00000148 in 1,350,542 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 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. A2V) has been classified as Pathogenic.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000015 (0 hom.)
• Consequence: ECHS1 NM_004092.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.12

Genes affected

ECHS1 (HGNC:3151): (enoyl-CoA hydratase, short chain 1) The protein encoded by this gene functions in the second step of the mitochondrial fatty acid beta-oxidation pathway. It catalyzes the hydration of 2-trans-enoyl-coenzyme A (CoA) intermediates to L-3-hydroxyacyl-CoAs. The gene product is a member of the hydratase/isomerase superfamily. It localizes to the mitochondrial matrix. Transcript variants utilizing alternative transcription initiation sites have been described in the literature. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 5 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 3 uncertain in NM_004092.4
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr10-133373329-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 156434.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP4: Computational evidence support a benign effect (MetaRNN=0.38316017).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ECHS1	NM_004092.4	c.5C>G	p.Ala2Gly	missense_variant	1/8	ENST00000368547.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ECHS1	ENST00000368547.4	c.5C>G	p.Ala2Gly	missense_variant	1/8	1	NM_004092.4	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000148 AC: 2 AN: 1350542 Hom.: 0 Cov.: 34 AF XY: 0.00000150 AC XY: 1 AN XY: 666302

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: 0.0000261

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

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	0.12
BayesDel_addAF	Benign	-0.045	T
BayesDel_noAF	Benign	-0.30
Cadd	Benign	23
Dann	Benign	0.93
DEOGEN2	Benign	0.030	T
Eigen	Benign	-0.63
Eigen_PC	Benign	-0.61
FATHMM_MKL	Benign	0.68	D
LIST_S2	Benign	0.41	T
M_CAP	Pathogenic	0.30	D
MetaRNN	Benign	0.38	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.55	N
MutationTaster	Benign	1.0	N
PrimateAI	Pathogenic	0.85	D
PROVEAN	Benign	-1.7	N
REVEL	Benign	0.28
Sift	Uncertain	0.016	D
Sift4G	Uncertain	0.043	D
Polyphen		0.61	P
Vest4		0.46
MutPred		0.28		Gain of disorder (P = 0.1635);
MVP		0.77
MPC		0.54
ClinPred		0.28	T
GERP RS		2.8
Varity_R		0.25
gMVP		0.76

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: rs587776498; hg19: chr10-135186833; COSMIC: COSV100881892; COSMIC: COSV100881892;