rs141601131

Positions:

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2BP4_StrongBP6

The NM_000170.3(GLDC):c.190G>T(p.Ala64Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000266 in 1,594,386 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00035 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00026 ( 1 hom. )

Consequence

GLDC
NM_000170.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:4

Conservation

PhyloP100: 0.758

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.017509818).

BP6

Variant 9-6645310-C-A is Benign according to our data. Variant chr9-6645310-C-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 462861.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=3, Uncertain_significance=1}. Variant chr9-6645310-C-A is described in Lovd as [Likely_benign].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GLDC	NM_000170.3 linkuse as main transcript	c.190G>T	p.Ala64Ser	missense_variant	1/25	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.190G>T	p.Ala64Ser	missense_variant	1/25	1	NM_000170.3	ENSP00000370737.4		P23378

Frequencies

GnomAD3 genomes

AF:

0.000355

AC:

AN:

152124

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000850

Gnomad ASJ

AF:

0.00490

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000279

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.000412

AC:

AN:

213782

Hom.:

AF XY:

0.000412

AC XY:

AN XY:

116528

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000674

Gnomad ASJ exome

AF:

0.00361

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000296

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000232

Gnomad OTH exome

AF:

0.000760

GnomAD4 exome

AF:

0.000257

AC:

370

AN:

1442144

Hom.:

Cov.:

AF XY:

0.000275

AC XY:

197

AN XY:

716382

show subpopulations

Gnomad4 AFR exome

AF:

0.000156

Gnomad4 AMR exome

AF:

0.000678

Gnomad4 ASJ exome

AF:

0.00388

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000300

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000141

Gnomad4 OTH exome

AF:

0.000723

GnomAD4 genome

AF:

0.000355

AC:

AN:

152242

Hom.:

Cov.:

AF XY:

0.000255

AC XY:

AN XY:

74446

show subpopulations

Gnomad4 AFR

AF:

0.0000722

Gnomad4 AMR

AF:

0.000849

Gnomad4 ASJ

AF:

0.00490

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000280

Gnomad4 OTH

AF:

0.000474

Alfa

AF:

0.000651

Hom.:

Bravo

AF:

0.000400

ExAC

AF:

0.000224

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Glycine encephalopathy

Uncertain:1Benign:1

Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 31, 2024	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 12, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 23, 2021

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Jan 21, 2020

- -

GLDC-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Oct 21, 2022

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.076

BayesDel_addAF

Benign

-0.26

BayesDel_noAF

Benign

-0.25

CADD

Benign

DANN

Benign

0.94

DEOGEN2

Benign

0.29

Eigen

Benign

-0.47

Eigen_PC

Benign

-0.27

FATHMM_MKL

Benign

0.58

LIST_S2

Uncertain

0.89

M_CAP

Uncertain

0.28

MetaRNN

Benign

0.018

MetaSVM

Uncertain

0.44

MutationAssessor

Benign

0.0

PrimateAI

Pathogenic

0.80

PROVEAN

Benign

-0.87

REVEL

Uncertain

0.32

Sift

Benign

0.55

Sift4G

Benign

0.55

Polyphen

0.0010

Vest4

0.10

MutPred

0.24

Gain of phosphorylation at A64 (P = 0.0201);

MVP

0.92

MPC

0.044

ClinPred

0.020

GERP RS

2.8

Varity_R

0.20

gMVP

0.50

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

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