rs75430014

Positions:

• chr19-12891977-G-A

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 0P and 7B. BP4_Moderate BP6 BS2

The NM_000159.4(GCDH):​c.271+3G>A variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000279 in 1,614,224 control chromosomes in the GnomAD database, including 5 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 0.0017 (5 hom., cov: 32)
  • Exomes 𝑓: 0.00013 (0 hom.)
• Consequence: GCDH NM_000159.4 splice_region, intron
• Scores: Splicing: ADA: 0.001554
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:5
• Conservation: PhyloP100: 3.28

Genes affected

GCDH (HGNC:4189): (glutaryl-CoA dehydrogenase) The protein encoded by this gene belongs to the acyl-CoA dehydrogenase family. It catalyzes the oxidative decarboxylation of glutaryl-CoA to crotonyl-CoA and CO(2) in the degradative pathway of L-lysine, L-hydroxylysine, and L-tryptophan metabolism. It uses electron transfer flavoprotein as its electron acceptor. The enzyme exists in the mitochondrial matrix as a homotetramer of 45-kD subunits. Mutations in this gene result in the metabolic disorder glutaric aciduria type 1, which is also known as glutaric acidemia type I. Alternative splicing of this gene results in multiple transcript variants. A related pseudogene has been identified on chromosome 12. [provided by RefSeq, Mar 2013]

GCDH (HGNC:):

ACMG classification

Verdict is Benign. Variant got -7 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.38).
• BP6: Variant 19-12891977-G-A is Benign according to our data. Variant chr19-12891977-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 235597.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=2}. Variant chr19-12891977-G-A is described in Lovd as [Likely_benign]. Variant chr19-12891977-G-A is described in Lovd as [Benign].
• BS2: High Homozygotes in GnomAd4 at 5 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GCDH	NM_000159.4	c.271+3G>A		splice_region_variant, intron_variant		ENST00000222214.10	NP_000150.1
GCDH	NM_013976.5	c.271+3G>A		splice_region_variant, intron_variant			NP_039663.1
GCDH	NR_102316.1	n.379+3G>A		splice_region_variant, intron_variant
GCDH	NR_102317.1	n.687+3G>A		splice_region_variant, intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GCDH	ENST00000222214.10	c.271+3G>A		splice_region_variant, intron_variant		1	NM_000159.4	ENSP00000222214.4

Frequencies

GnomAD3 genomes AF: 0.00157 AC: 239 AN: 152214 Hom.: 1 Cov.: 32

Gnomad AFR AF: 0.00560

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000393

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000358 AC: 90 AN: 251398 Hom.: 0 AF XY: 0.000250 AC XY: 34 AN XY: 135890

Gnomad AFR exome AF: 0.00492

Gnomad AMR exome AF: 0.000145

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.000326

GnomAD4 exome AF: 0.000133 AC: 194 AN: 1461892 Hom.: 0 Cov.: 33 AF XY: 0.0000976 AC XY: 71 AN XY: 727248

Gnomad4 AFR exome AF: 0.00487

Gnomad4 AMR exome AF: 0.000157

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000629

Gnomad4 OTH exome AF: 0.000248

GnomAD4 genome AF: 0.00169 AC: 257 AN: 152332 Hom.: 5 Cov.: 32 AF XY: 0.00183 AC XY: 136 AN XY: 74492

Gnomad4 AFR AF: 0.00604

Gnomad4 AMR AF: 0.000392

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000814 Hom.: 0

Bravo AF: 0.00155

Asia WGS AF: 0.00318 AC: 11 AN: 3478

EpiCase AF: 0.00

EpiControl AF: 0.0000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:5

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Uncertain:2 Benign:2

Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics	Jun 04, 2015	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Aug 14, 2019	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	Apr 11, 2024	BS1 -

Glutaric aciduria, type 1 Benign:2

Likely benign, no assertion criteria provided	clinical testing	Natera, Inc.	May 29, 2020	- -
Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 29, 2024	- -

not specified Benign:1

Benign, no assertion criteria provided

clinical testing

Clinical Genetics, Academic Medical Center

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.38
CADD	Benign	17
DANN	Benign	0.96

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.0016
dbscSNV1_RF	Benign	0.060
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

Other links and lift over

dbSNP: rs75430014; hg19: chr19-13002791;