rs387907170

Variant names:

• chr4-158703436-T-C
• rs387907170
• NM_004453.4:c.1130T>C

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PM2 PP3_Strong PP5_Very_Strong

The NM_004453.4(ETFDH):​c.1130T>C​(p.Leu377Pro) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,458,978 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 (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: ETFDH NM_004453.4 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:11
• Conservation: PhyloP100: 8.02

Genes affected

ETFDH (HGNC:3483): (electron transfer flavoprotein dehydrogenase) This gene encodes a component of the electron-transfer system in mitochondria and is essential for electron transfer from a number of mitochondrial flavin-containing dehydrogenases to the main respiratory chain. Mutations in this gene are associated with glutaric acidemia. Alternatively spliced transcript variants that encode distinct isoforms have been observed. [provided by RefSeq, Aug 2013]

ACMG classification

Verdict is Pathogenic. Variant got 14 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.986
• PP5: Variant 4-158703436-T-C is Pathogenic according to our data. Variant chr4-158703436-T-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 31601.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr4-158703436-T-C is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ETFDH	NM_004453.4	c.1130T>C	p.Leu377Pro	missense_variant	Exon 10 of 13	ENST00000511912.6	NP_004444.2
ETFDH	NM_001281737.2	c.989T>C	p.Leu330Pro	missense_variant	Exon 9 of 12		NP_001268666.1
ETFDH	NM_001281738.1	c.947T>C	p.Leu316Pro	missense_variant	Exon 8 of 11		NP_001268667.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ETFDH	ENST00000511912.6	c.1130T>C	p.Leu377Pro	missense_variant	Exon 10 of 13	1	NM_004453.4	ENSP00000426638.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251294 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135822

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

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: 0.00000880

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1458978 Hom.: 0 Cov.: 29 AF XY: 0.00000138 AC XY: 1 AN XY: 726060

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: 9.01e-7

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:11

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Multiple acyl-CoA dehydrogenase deficiency Pathogenic:7

Oct 24, 2017

Institute of Human Genetics Munich, Klinikum Rechts Der Isar, TU München

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dec 19, 2023

Baylor Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jul 22, 2021

Genome-Nilou Lab

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jun 17, 2022

MGZ Medical Genetics Center

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

May 16, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jun 02, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

For these reasons, this variant has been classified as Pathogenic. 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 not expected to disrupt ETFDH protein function. ClinVar contains an entry for this variant (Variation ID: 31601). This missense change has been observed in individual(s) with multiple Acyl-CoA dehydrogenase deficiency (PMID: 17412732, 29339009, 29376578, 31331668). This sequence change replaces leucine, which is neutral and non-polar, with proline, which is neutral and non-polar, at codon 377 of the ETFDH protein (p.Leu377Pro). This variant is present in population databases (rs387907170, gnomAD 0.0009%). -

May 16, 2024

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: ETFDH c.1130T>C (p.Leu377Pro) results in a non-conservative amino acid change in the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 4e-06 in 251294 control chromosomes. c.1130T>C has been reported in the literature in multiple individuals affected with Glutaric Aciduria, Type 2c (e.g., Nilipour_2020). These data indicate that the variant is very likely to be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publication has been ascertained in the context of this evaluation (PMID: 32007756). ClinVar contains an entry for this variant (Variation ID: 31601). Based on the evidence outlined above, the variant was classified as pathogenic. -

Inborn genetic diseases Pathogenic:1

Jul 21, 2014

Ambry Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1130T>C (p.L377P) alteration is located in exon 10 (coding exon 10) of the ETFDH gene. This alteration results from a T to C substitution at nucleotide position 1130, causing the leucine (L) at amino acid position 377 to be replaced by a proline (P). Based on data from the NHLBI Exome Sequencing Project (ESP), the c.1130T>C alteration was not observed among 6,503 individuals tested (0.0%). Allele frequency data for this nucleotide position are not currently available from the 1000 Genomes Project and the alteration is not currently listed in the Database of Single Nucleotide Polymorphisms (dbSNP). Though some variants may appear to be rare due to database-specific ethnic underrepresentation, rare missense alleles commonly exhibit a deleterious effect on protein function (Kryukov, 2007; Tennessen, 2012). REFERENCES: Kryukov GV, et al. (2007) Am J Hum Genet 80:727-739. Tennessen JA, et al. (2012) Science 337(64):64-69. Reported in association with CoQ10 deficiency (Gempel (2007) Brain 130, 2037). This amino acid position is completely conserved in available vertebrate species. This alteration is predicted to be probably damaging and deleterious by PolyPhen and SIFT in silico analyses, respectively. Based on the available evidence, this alteration is classified as pathogenic. -

Glutaric acidemia type 2C Pathogenic:1

Sep 11, 2020

Natera, Inc.

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

not provided Pathogenic:1

Jul 10, 2021

Kariminejad - Najmabadi Pathology & Genetics Center

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Glutaric acidemia iic, late-onset Pathogenic:1

Aug 01, 2007

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.46
BayesDel_addAF	Pathogenic	0.44	D
BayesDel_noAF	Pathogenic	0.40
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.65	D;.
Eigen	Pathogenic	0.83
Eigen_PC	Pathogenic	0.79
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	0.98	D;D
M_CAP	Pathogenic	0.58	D
MetaRNN	Pathogenic	0.99	D;D
MetaSVM	Uncertain	0.76	D
MutationAssessor	Pathogenic	3.1	M;.
PrimateAI	Pathogenic	0.88	D
PROVEAN	Pathogenic	-6.3	D;D
REVEL	Pathogenic	0.92
Sift	Benign	0.048	D;T
Sift4G	Uncertain	0.040	D;D
Polyphen		1.0	D;.
Vest4		0.99
MutPred		0.91		Gain of disorder (P = 0.0178);.;
MVP		0.98
MPC		0.63
ClinPred		0.99	D
GERP RS		5.4
Varity_R		0.92
gMVP		0.99

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: rs387907170; hg19: chr4-159624588;