19-12899473-C-G

Position:

chr19-12899473-C-G

Variant summary

Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PM1PM2PM5PP3PP5_Moderate

The NM_000159.4(GCDH):c.1249C>G(p.His417Asp) variant causes a missense change. The variant allele was found at a frequency of 0.0000041 in 1,461,884 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 Pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. H417Y) has been classified as Likely pathogenic.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 0.0000041 ( 0 hom. )

Consequence

GCDH
NM_000159.4 missense

Scores

Clinical Significance

Pathogenic criteria provided, single submitter P:1

Conservation

PhyloP100: 5.96

Variant links:

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]

GCDH links:

SYCE2 (HGNC:27411): (synaptonemal complex central element protein 2) The protein encoded by this gene is part of the synaptonemal complex formed between homologous chromosomes during meiotic prophase. The encoded protein associates with SYCP1 and SYCE1 and is found only where chromosome cores are synapsed. [provided by RefSeq, Dec 2012]

SYCE2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 9 ACMG points.

PM1

In a hotspot region, there are 6 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 1 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 chr19-12899473-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 2675868.Status of the report is criteria_provided_single_submitter, 1 stars.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.755

PP5

Variant 19-12899473-C-G is Pathogenic according to our data. Variant chr19-12899473-C-G is described in ClinVar as [Pathogenic]. Clinvar id is 529443.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GCDH	NM_000159.4 linkuse as main transcript	c.1249C>G	p.His417Asp	missense_variant	12/12	ENST00000222214.10
SYCE2	NM_001105578.2 linkuse as main transcript	c.613-88G>C		intron_variant		ENST00000293695.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GCDH	ENST00000222214.10 linkuse as main transcript	c.1249C>G	p.His417Asp	missense_variant	12/12	1	NM_000159.4	P1	Q92947-1
SYCE2	ENST00000293695.8 linkuse as main transcript	c.613-88G>C		intron_variant		1	NM_001105578.2	P1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251268

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135840

show subpopulations

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:

0.00000881

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000410

AC:

AN:

1461884

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

727246

show subpopulations

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:

0.00000540

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Glutaric aciduria, type 1

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Apr 14, 2022

This sequence change replaces histidine, which is basic and polar, with aspartic acid, which is acidic and polar, at codon 417 of the GCDH protein (p.His417Asp). This variant is present in population databases (no rsID available, gnomAD 0.0009%). This missense change has been observed in individual(s) with GCDH-related conditions (Invitae). ClinVar contains an entry for this variant (Variation ID: 529443). 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 GCDH protein function. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. This variant disrupts the p.His417 amino acid residue in GCDH. Other variant(s) that disrupt this residue have been observed in individuals with GCDH-related conditions (PMID: 29665094), which suggests that this may be a clinically significant amino acid residue. For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.50

BayesDel_addAF

Pathogenic

0.46

BayesDel_noAF

Pathogenic

0.43

CADD

Pathogenic

DANN

Uncertain

0.99

DEOGEN2

Pathogenic

0.94

D;D

Eigen

Benign

0.10

Eigen_PC

Benign

0.20

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.97

.;D

M_CAP

Uncertain

0.22

MetaRNN

Pathogenic

0.75

D;D

MetaSVM

Uncertain

0.73

MutationAssessor

Benign

2.0

M;M

MutationTaster

Benign

1.0

D;D;D;D;D

PrimateAI

Pathogenic

0.81

PROVEAN

Pathogenic

-8.1

D;.

REVEL

Pathogenic

0.75

Sift

Uncertain

0.013

D;.

Sift4G

Benign

0.15

T;T

Polyphen

0.010

B;B

Vest4

0.69

MutPred

0.49

Gain of relative solvent accessibility (P = 0.1571);Gain of relative solvent accessibility (P = 0.1571);

MVP

0.96

MPC

1.3

ClinPred

0.97

GERP RS

4.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.6

Varity_R

0.90

gMVP

0.99

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.38

Details are displayed if max score is > 0.2

DS_AG_spliceai

0.38

Position offset: 1

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over