9-6606634-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1

The NM_000170.3(GLDC):c.671G>A(p.Arg224His) variant causes a missense change. The variant allele was found at a frequency of 0.00491 in 1,608,656 control chromosomes in the GnomAD database, including 221 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R224C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.021 ( 105 hom., cov: 32)

Exomes 𝑓: 0.0032 ( 116 hom. )

Consequence

GLDC
NM_000170.3 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:7

Conservation

PhyloP100: 5.48

Publications

5 publications found

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 Gene-Disease associations (from GenCC):

glycine encephalopathy
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Myriad Women’s Health, Labcorp Genetics (formerly Invitae), ClinGen
glycine encephalopathy 1
Inheritance: AR Classification: DEFINITIVE Submitted by: G2P
infantile glycine encephalopathy
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
neonatal glycine encephalopathy
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
atypical glycine encephalopathy
Inheritance: Unknown Classification: SUPPORTIVE Submitted by: Orphanet

GLDC links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.006960869).

BP6

Variant 9-6606634-C-T is Benign according to our data. Variant chr9-6606634-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 367200.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0683 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GLDC	NM_000170.3 link	c.671G>A	p.Arg224His	missense_variant	Exon 5 of 25	ENST00000321612.8	NP_000161.2	P23378

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GLDC	ENST00000321612.8 link	c.671G>A	p.Arg224His	missense_variant	Exon 5 of 25	1	NM_000170.3	ENSP00000370737.4		P23378

Frequencies

GnomAD3 genomes

AF:

0.0212

AC:

3217

AN:

152086

Hom.:

104

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0703

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00897

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00384

Gnomad SAS

AF:

0.0213

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000250

Gnomad OTH

AF:

0.0139

GnomAD2 exomes

AF:

0.00841

AC:

2115

AN:

251466

AF XY:

0.00798

show subpopulations

Gnomad AFR exome

AF:

0.0723

Gnomad AMR exome

AF:

0.00318

Gnomad ASJ exome

AF:

0.0000992

Gnomad EAS exome

AF:

0.00304

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000237

Gnomad OTH exome

AF:

0.00489

GnomAD4 exome

AF:

0.00320

AC:

4656

AN:

1456452

Hom.:

116

Cov.:

AF XY:

0.00347

AC XY:

2519

AN XY:

725016

show subpopulations

African (AFR)

AF:

0.0661

AC:

2173

AN:

32898

American (AMR)

AF:

0.00398

AC:

178

AN:

44714

Ashkenazi Jewish (ASJ)

AF:

0.0000383

AC:

AN:

26100

East Asian (EAS)

AF:

0.00108

AC:

AN:

39666

South Asian (SAS)

AF:

0.0187

AC:

1608

AN:

86064

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00278

AC:

AN:

5758

European-Non Finnish (NFE)

AF:

0.000208

AC:

230

AN:

1107630

Other (OTH)

AF:

0.00676

AC:

407

AN:

60202

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.424

Heterozygous variant carriers

225

450

676

901

1126

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

180

270

360

450

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0213

AC:

3237

AN:

152204

Hom.:

105

Cov.:

AF XY:

0.0213

AC XY:

1585

AN XY:

74420

show subpopulations

African (AFR)

AF:

0.0704

AC:

2923

AN:

41508

American (AMR)

AF:

0.00896

AC:

137

AN:

15294

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00385

AC:

AN:

5190

South Asian (SAS)

AF:

0.0207

AC:

100

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10580

Middle Eastern (MID)

AF:

0.00340

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000250

AC:

AN:

68014

Other (OTH)

AF:

0.0184

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

156

312

468

624

780

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

114

152

190

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0174

Hom.:

Bravo

AF:

0.0236

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.0681

AC:

300

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.00986

AC:

1197

Asia WGS

AF:

0.0440

AC:

152

AN:

3478

EpiCase

AF:

0.000545

EpiControl

AF:

0.000296

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Glycine encephalopathy

Benign:3

Sep 16, 2020

Natera, Inc.

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Apr 28, 2017

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:2

Jul 26, 2018

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

not specified

Benign:1

Jun 29, 2017

Athena Diagnostics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

GLDC-related disorder

Benign:1

Feb 28, 2019

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as 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

0.16

BayesDel_addAF

Benign

-0.25

BayesDel_noAF

Uncertain

-0.080

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.50

D;.

Eigen

Uncertain

0.45

Eigen_PC

Uncertain

0.46

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Pathogenic

0.99

D;D

MetaRNN

Benign

0.0070

T;T

MetaSVM

Uncertain

-0.15

MutationAssessor

Benign

0.82

L;.

PhyloP100

5.5

PrimateAI

Uncertain

0.50

PROVEAN

Benign

-1.5

N;.

REVEL

Pathogenic

0.66

Sift

Benign

0.14

T;.

Sift4G

Benign

0.19

T;.

Polyphen

0.99

D;.

Vest4

0.52

MVP

0.99

MPC

0.062

ClinPred

0.019

GERP RS

4.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.25

gMVP

0.80

Mutation Taster

=92/8

polymorphism (auto)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over