9-6645460-G-T

Position:

chr9-6645460-G-T

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4_StrongBP6

The NM_000170.3(GLDC):c.40C>A(p.Arg14Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000396 in 1,247,936 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/20 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 0.0019 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00019 ( 1 hom. )

Consequence

GLDC
NM_000170.3 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: -0.00300

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 -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.005253941).

BP6

Variant 9-6645460-G-T is Benign according to our data. Variant chr9-6645460-G-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 462885.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GLDC	NM_000170.3 linkuse as main transcript	c.40C>A	p.Arg14Ser	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.40C>A	p.Arg14Ser	missense_variant	1/25	1	NM_000170.3	ENSP00000370737.4		P23378

Frequencies

GnomAD3 genomes

AF:

0.00191

AC:

288

AN:

150496

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00684

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000330

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:

0.0000148

Gnomad OTH

AF:

0.000974

GnomAD3 exomes

AF:

0.000222

AC:

AN:

4496

Hom.:

AF XY:

0.00

AC XY:

AN XY:

2748

show subpopulations

Gnomad AFR exome

AF:

0.0143

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000188

AC:

206

AN:

1097328

Hom.:

Cov.:

AF XY:

0.000161

AC XY:

AN XY:

526686

show subpopulations

Gnomad4 AFR exome

AF:

0.00724

Gnomad4 AMR exome

AF:

0.000507

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000411

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000321

Gnomad4 OTH exome

AF:

0.000849

GnomAD4 genome

AF:

0.00191

AC:

288

AN:

150608

Hom.:

Cov.:

AF XY:

0.00201

AC XY:

148

AN XY:

73608

show subpopulations

Gnomad4 AFR

AF:

0.00684

Gnomad4 AMR

AF:

0.000264

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000148

Gnomad4 OTH

AF:

0.000963

Bravo

AF:

0.00215

ExAC

AF:

0.000202

AC:

Asia WGS

AF:

0.00117

AC:

AN:

3446

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Glycine encephalopathy

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 31, 2024	- -
Likely benign, no assertion criteria provided	clinical testing	Natera, Inc.	Sep 16, 2020	- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 28, 2024

The c.40C>A (p.R14S) alteration is located in exon 1 (coding exon 1) of the GLDC gene. This alteration results from a C to A substitution at nucleotide position 40, causing the arginine (R) at amino acid position 14 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Apr 20, 2021

- -

GLDC-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Apr 02, 2024

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

0.14

BayesDel_addAF

Benign

-0.29

BayesDel_noAF

Benign

-0.19

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.24

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.055

LIST_S2

Benign

0.39

MetaRNN

Benign

0.0053

MetaSVM

Uncertain

0.050

MutationAssessor

Benign

0.0

PrimateAI

Uncertain

0.75

PROVEAN

Benign

-0.040

REVEL

Uncertain

0.34

Sift

Benign

0.12

Sift4G

Uncertain

0.024

Polyphen

0.0

Vest4

0.18

MVP

0.81

MPC

0.050

ClinPred

0.043

GERP RS

-0.066

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.089

gMVP

0.45

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