rs898043081

chr19-12891929-C-Gchr19-12891929-C-T

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1 PM2 PM5

The NM_000159.4(GCDH):c.226C>G(p.Gln76Glu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,882 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. Q76P) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: GCDH NM_000159.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.44

Genes affected

GCDH (HGNC:4189): (glutaryl-CoA dehydrogenase) The protein encoded by this gene belongs to the acyl-CoA dehydrogenase family. It catalyzes the oxidative decarboxylation of glutaryl-CoA to crotonyl-CoA and CO(2) in the degradative pathway of L-lysine, L-hydroxylysine, and L-tryptophan metabolism. It uses electron transfer flavoprotein as its electron acceptor. The enzyme exists in the mitochondrial matrix as a homotetramer of 45-kD subunits. Mutations in this gene result in the metabolic disorder glutaric aciduria type 1, which is also known as glutaric acidemia type I. Alternative splicing of this gene results in multiple transcript variants. A related pseudogene has been identified on chromosome 12. [provided by RefSeq, Mar 2013]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 8 uncertain in NM_000159.4
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr19-12891930-A-C is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GCDH	NM_000159.4	c.226C>G	p.Gln76Glu	missense_variant	4/12	ENST00000222214.10
GCDH	NM_013976.5	c.226C>G	p.Gln76Glu	missense_variant	4/12
GCDH	NR_102316.1	n.334C>G		non_coding_transcript_exon_variant	4/12
GCDH	NR_102317.1	n.642C>G		non_coding_transcript_exon_variant	3/11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GCDH	ENST00000222214.10	c.226C>G	p.Gln76Glu	missense_variant	4/12	1	NM_000159.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251416 Hom.: 0 AF XY: 0.00000736 AC XY: 1 AN XY: 135894

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: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461882 Hom.: 0 Cov.: 33 AF XY: 0.00000138 AC XY: 1 AN XY: 727242

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: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.092
BayesDel_addAF	Uncertain	0.14	D
BayesDel_noAF	Uncertain	0.050
Cadd	Uncertain	24
Dann	Uncertain	0.99
DEOGEN2	Pathogenic	0.91	D;.;D;D;D
Eigen	Benign	0.086
Eigen_PC	Uncertain	0.27
FATHMM_MKL	Uncertain	0.93	D
M_CAP	Uncertain	0.25	D
MetaRNN	Uncertain	0.45	T;T;T;T;T
MetaSVM	Pathogenic	0.99	D
MutationAssessor	Benign	0.91	L;.;L;.;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Uncertain	0.49	T
PROVEAN	Uncertain	-2.4	N;.;.;.;.
REVEL	Uncertain	0.52
Sift	Benign	0.040	D;.;.;.;.
Sift4G	Benign	0.24	T;T;T;T;T
Polyphen		0.0020	B;.;B;.;.
Vest4		0.50
MutPred		0.42		Gain of phosphorylation at T73 (P = 0.1242);Gain of phosphorylation at T73 (P = 0.1242);Gain of phosphorylation at T73 (P = 0.1242);.;Gain of phosphorylation at T73 (P = 0.1242);
MVP		0.94
MPC		0.41
ClinPred		0.56	D
GERP RS		5.2
Varity_R		0.74
gMVP		0.68

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

LitVar

Other links and lift over

dbSNP: rs898043081; hg19: chr19-13002743;