rs386833524

Positions:

chr9-6592870-C-T

Variant summary

Our verdict is Pathogenic. Variant got 16 ACMG points: 16P and 0B. PM2PM5PP3_StrongPP5_Very_Strong

The NM_000170.3(GLDC):c.1382G>A(p.Arg461Gln) variant causes a missense change. The variant allele was found at a frequency of 0.00000806 in 1,613,528 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 (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R461W) has been classified as Pathogenic.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000082 ( 0 hom. )

Consequence

GLDC
NM_000170.3 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:6

Conservation

PhyloP100: 6.77

Variant links:

Genes affected

GLDC (HGNC:4313): (glycine decarboxylase) Degradation of glycine is brought about by the glycine cleavage system, which is composed of four mitochondrial protein components: P protein (a pyridoxal phosphate-dependent glycine decarboxylase), H protein (a lipoic acid-containing protein), T protein (a tetrahydrofolate-requiring enzyme), and L protein (a lipoamide dehydrogenase). The protein encoded by this gene is the P protein, which binds to glycine and enables the methylamine group from glycine to be transferred to the T protein. Defects in this gene are a cause of nonketotic hyperglycinemia (NKH).[provided by RefSeq, Jan 2010]

GLDC links:

GLDC (HGNC:):

GLDC links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 16 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr9-6592871-G-A is described in Lovd as [Pathogenic].

PP3

MetaRNN computational evidence supports a deleterious effect, 0.97

PP5

Variant 9-6592870-C-T is Pathogenic according to our data. Variant chr9-6592870-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 56043.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr9-6592870-C-T is described in Lovd as [Pathogenic]. Variant chr9-6592870-C-T is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GLDC	NM_000170.3 linkuse as main transcript	c.1382G>A	p.Arg461Gln	missense_variant	10/25	ENST00000321612.8	NP_000161.2	P23378

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GLDC	ENST00000321612.8 linkuse as main transcript	c.1382G>A	p.Arg461Gln	missense_variant	10/25	1	NM_000170.3	ENSP00000370737.4		P23378

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152202

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000795

AC:

AN:

251428

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135886

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:

0.0000653

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000821

AC:

AN:

1461326

Hom.:

Cov.:

AF XY:

0.00000963

AC XY:

AN XY:

726988

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000450

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152202

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74348

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Non-ketotic hyperglycinemia

Pathogenic:5

Pathogenic, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Jul 30, 2019	- -
Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Nov 15, 2023	This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 461 of the GLDC protein (p.Arg461Gln). This variant is present in population databases (rs386833524, gnomAD 0.006%). This missense change has been observed in individual(s) with glycine encephalopathy (PMID: 16601880, 26179960). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 56043). 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 GLDC protein function with a positive predictive value of 80%. Experimental studies have shown that this missense change affects GLDC function (PMID: 26179960). For these reasons, this variant has been classified as Pathogenic. -
Pathogenic, no assertion criteria provided	clinical testing	Natera, Inc.	Jun 11, 2021	- -
Likely pathogenic, no assertion criteria provided	literature only	Juha Muilu Group; Institute for Molecular Medicine Finland (FIMM)	-	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Counsyl	Mar 28, 2018	- -

GLDC-related disorder

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Feb 01, 2023

The GLDC c.1382G>A variant is predicted to result in the amino acid substitution p.Arg461Gln. This variant has been reported in the compound heterozygous state in multiple individuals with non-ketotic hyperglycinemia (Conter et al 2006. PubMed ID: 16601880; Suzuki Y et al 2010. PubMed ID: 20691948; Coughlin CR et al 2016. PubMed ID: 27362913; Farris et al. 2020. PubMed ID: 32421718). Functional studies have shown that this variant has the measurable residual activity of 0.5 to 1% of control (Swanson MA et al 2015. PubMed ID: 26179960). This variant is reported in 0.0065% of alleles in individuals of South Asian descent in gnomAD (http://gnomad.broadinstitute.org/variant/9-6592870-C-T). This variant is interpreted as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.54

BayesDel_addAF

Pathogenic

0.35

BayesDel_noAF

Pathogenic

0.45

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.84

Eigen

Pathogenic

0.93

Eigen_PC

Pathogenic

0.87

FATHMM_MKL

Uncertain

0.97

LIST_S2

Uncertain

0.95

M_CAP

Uncertain

0.24

MetaRNN

Pathogenic

0.97

MetaSVM

Pathogenic

1.1

MutationAssessor

Pathogenic

3.0

PrimateAI

Benign

0.40

PROVEAN

Uncertain

-4.0

REVEL

Pathogenic

0.92

Sift

Uncertain

0.0010

Sift4G

Uncertain

0.0040

Polyphen

1.0

Vest4

0.90

MutPred

0.78

Loss of sheet (P = 0.0357);

MVP

0.99

MPC

0.33

ClinPred

0.98

GERP RS

5.7

Varity_R

0.95

gMVP

0.87

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.10

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

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