9-6556307-G-C

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_000170.3(GLDC):​c.2053-5C>G variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00404 in 1,611,998 control chromosomes in the GnomAD database, including 19 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0028 ( 1 hom., cov: 32)
Exomes 𝑓: 0.0042 ( 18 hom. )

Consequence

GLDC
NM_000170.3 splice_region, intron

Scores

2
Splicing: ADA: 0.00005783
2

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:8

Conservation

PhyloP100: -0.111
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]

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -13 ACMG points.

BP4
Computational evidence support a benign effect (BayesDel_noAF=-0.82).
BP6
Variant 9-6556307-G-C is Benign according to our data. Variant chr9-6556307-G-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 235561.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=3, Benign=3, Uncertain_significance=1}. Variant chr9-6556307-G-C is described in Lovd as [Benign]. Variant chr9-6556307-G-C is described in Lovd as [Likely_benign].
BS1
Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00278 (424/152264) while in subpopulation NFE AF= 0.00506 (344/68010). AF 95% confidence interval is 0.00462. There are 1 homozygotes in gnomad4. There are 195 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
BS2
High Homozygotes in GnomAdExome4 at 18 AR gene

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
GLDCNM_000170.3 linkc.2053-5C>G splice_region_variant, intron_variant Intron 17 of 24 ENST00000321612.8 NP_000161.2 P23378

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
GLDCENST00000321612.8 linkc.2053-5C>G splice_region_variant, intron_variant Intron 17 of 24 1 NM_000170.3 ENSP00000370737.4 P23378

Frequencies

GnomAD3 genomes
AF:
0.00279
AC:
424
AN:
152146
Hom.:
1
Cov.:
32
show subpopulations
Gnomad AFR
AF:
0.000869
Gnomad AMI
AF:
0.00
Gnomad AMR
AF:
0.00105
Gnomad ASJ
AF:
0.00
Gnomad EAS
AF:
0.00
Gnomad SAS
AF:
0.00228
Gnomad FIN
AF:
0.00132
Gnomad MID
AF:
0.00
Gnomad NFE
AF:
0.00506
Gnomad OTH
AF:
0.00144
GnomAD3 exomes
AF:
0.00220
AC:
554
AN:
251430
Hom.:
2
AF XY:
0.00227
AC XY:
309
AN XY:
135880
show subpopulations
Gnomad AFR exome
AF:
0.000677
Gnomad AMR exome
AF:
0.00202
Gnomad ASJ exome
AF:
0.00
Gnomad EAS exome
AF:
0.00
Gnomad SAS exome
AF:
0.000523
Gnomad FIN exome
AF:
0.00115
Gnomad NFE exome
AF:
0.00368
Gnomad OTH exome
AF:
0.00228
GnomAD4 exome
AF:
0.00417
AC:
6086
AN:
1459734
Hom.:
18
Cov.:
31
AF XY:
0.00415
AC XY:
3013
AN XY:
726378
show subpopulations
Gnomad4 AFR exome
AF:
0.000419
Gnomad4 AMR exome
AF:
0.00195
Gnomad4 ASJ exome
AF:
0.00
Gnomad4 EAS exome
AF:
0.00
Gnomad4 SAS exome
AF:
0.00101
Gnomad4 FIN exome
AF:
0.000861
Gnomad4 NFE exome
AF:
0.00512
Gnomad4 OTH exome
AF:
0.00284
GnomAD4 genome
AF:
0.00278
AC:
424
AN:
152264
Hom.:
1
Cov.:
32
AF XY:
0.00262
AC XY:
195
AN XY:
74458
show subpopulations
Gnomad4 AFR
AF:
0.000866
Gnomad4 AMR
AF:
0.00105
Gnomad4 ASJ
AF:
0.00
Gnomad4 EAS
AF:
0.00
Gnomad4 SAS
AF:
0.00228
Gnomad4 FIN
AF:
0.00132
Gnomad4 NFE
AF:
0.00506
Gnomad4 OTH
AF:
0.00142
Alfa
AF:
0.00387
Hom.:
2
Bravo
AF:
0.00264
Asia WGS
AF:
0.000866
AC:
3
AN:
3478
EpiCase
AF:
0.00463
EpiControl
AF:
0.00314

ClinVar

Significance: Conflicting classifications of pathogenicity
Submissions summary: Uncertain:1Benign:8
Revision: criteria provided, conflicting classifications
LINK: link

Submissions by phenotype

not provided Uncertain:1Benign:3
Aug 21, 2020
GeneDx
Significance: Likely benign
Review Status: criteria provided, single submitter
Collection Method: clinical testing

This variant is associated with the following publications: (PMID: 28244183) -

Feb 01, 2025
CeGaT Center for Human Genetics Tuebingen
Significance: Likely benign
Review Status: criteria provided, single submitter
Collection Method: clinical testing

GLDC: BP4, BS2 -

-
Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center
Significance: Likely benign
Review Status: no assertion criteria provided
Collection Method: clinical testing

- -

Mar 22, 2016
Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics
Significance: Uncertain significance
Review Status: criteria provided, single submitter
Collection Method: clinical testing

- -

Glycine encephalopathy Benign:3
May 16, 2018
Counsyl
Significance: Likely benign
Review Status: criteria provided, single submitter
Collection Method: clinical testing

- -

Jan 27, 2025
Labcorp Genetics (formerly Invitae), Labcorp
Significance: Benign
Review Status: criteria provided, single submitter
Collection Method: clinical testing

- -

Apr 27, 2017
Illumina Laboratory Services, Illumina
Significance: 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 was too high to be consistent with this variant causing disease. Therefore, this variant is classified as benign. -

not specified Benign:2
Sep 17, 2024
Athena Diagnostics
Significance: Benign
Review Status: criteria provided, single submitter
Collection Method: clinical testing

- -

-
Genome Diagnostics Laboratory, University Medical Center Utrecht
Significance: Benign
Review Status: no assertion criteria provided
Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
BayesDel_noAF
Benign
-0.82
CADD
Benign
5.7
DANN
Benign
0.53

Splicing

Name
Calibrated prediction
Score
Prediction
dbscSNV1_ADA
Benign
0.000058
dbscSNV1_RF
Benign
0.026
SpliceAI score (max)
0.050
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.

Other links and lift over

dbSNP: rs140877566; hg19: chr9-6556307; API