chr6-43450804-C-T

Variant names:

• chr6-43450804-C-T
• rs200707852
• NM_023932.4:c.887G>A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_023932.4(DLK2):​c.887G>A​(p.Arg296Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000861 in 1,614,088 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R296W) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.000072 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000088 (1 hom.)
• Consequence: DLK2 NM_023932.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.39

Genes affected

DLK2 (HGNC:21113): (delta like non-canonical Notch ligand 2) Predicted to enable Notch binding activity. Involved in negative regulation of Notch signaling pathway. Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

ABCC10 (HGNC:52): (ATP binding cassette subfamily C member 10) The protein encoded by this gene is a member of the superfamily of ATP-binding cassette (ABC) transporters. ABC proteins transport various molecules across extra- and intra-cellular membranes. ABC genes are divided into seven distinct subfamilies (ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, and White). This ABC full-transporter is a member of the MRP subfamily which is involved in multi-drug resistance. Multiple transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Nov 2010]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.037432015).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DLK2	NM_023932.4	c.887G>A	p.Arg296Gln	missense_variant	Exon 6 of 6	ENST00000372488.8	NP_076421.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DLK2	ENST00000372488.8	c.887G>A	p.Arg296Gln	missense_variant	Exon 6 of 6	1	NM_023932.4	ENSP00000361566.3
DLK2	ENST00000357338.3	c.887G>A	p.Arg296Gln	missense_variant	Exon 6 of 6	2		ENSP00000349893.3
DLK2	ENST00000372485.5	c.869G>A	p.Arg290Gln	missense_variant	Exon 6 of 6	5		ENSP00000361563.1
DLK2	ENST00000430324.5	c.602G>A	p.Arg201Gln	missense_variant	Exon 3 of 3	2		ENSP00000399829.1

Frequencies

GnomAD3 genomes AF: 0.0000723 AC: 11 AN: 152218 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000654

Gnomad ASJ AF: 0.000865

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000588

Gnomad OTH AF: 0.000478

GnomAD3 exomes AF: 0.000152 AC: 38 AN: 250806 Hom.: 1 AF XY: 0.000140 AC XY: 19 AN XY: 135600

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00139

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000294

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000106

Gnomad OTH exome AF: 0.000326

GnomAD4 exome AF: 0.0000876 AC: 128 AN: 1461870 Hom.: 1 Cov.: 31 AF XY: 0.000100 AC XY: 73 AN XY: 727236

Gnomad4 AFR exome AF: 0.0000299

Gnomad4 AMR exome AF: 0.0000224

Gnomad4 ASJ exome AF: 0.00107

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000197

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000558

Gnomad4 OTH exome AF: 0.000265

GnomAD4 genome AF: 0.0000723 AC: 11 AN: 152218 Hom.: 0 Cov.: 32 AF XY: 0.0000538 AC XY: 4 AN XY: 74352

Gnomad4 AFR AF: 0.0000241

Gnomad4 AMR AF: 0.0000654

Gnomad4 ASJ AF: 0.000865

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000588

Gnomad4 OTH AF: 0.000478

Alfa AF: 0.000203 Hom.: 0

Bravo AF: 0.0000907

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000116 AC: 1

ExAC AF: 0.000123 AC: 15

EpiCase AF: 0.0000545

EpiControl AF: 0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Nov 27, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.887G>A (p.R296Q) alteration is located in exon 6 (coding exon 5) of the DLK2 gene. This alteration results from a G to A substitution at nucleotide position 887, causing the arginine (R) at amino acid position 296 to be replaced by a glutamine (Q). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.089
BayesDel_addAF	Benign	-0.21	T
BayesDel_noAF	Benign	-0.24
CADD	Benign	23
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.0088	T;T;T
Eigen	Benign	0.088
Eigen_PC	Benign	0.18
FATHMM_MKL	Uncertain	0.83	D
LIST_S2	Uncertain	0.95	D;.;D
M_CAP	Benign	0.062	D
MetaRNN	Benign	0.037	T;T;T
MetaSVM	Benign	-0.69	T
MutationAssessor	Benign	0.97	.;L;L
PrimateAI	Uncertain	0.67	T
PROVEAN	Benign	-0.19	N;N;N
REVEL	Benign	0.24
Sift	Benign	0.36	T;T;T
Sift4G	Benign	0.42	T;T;T
Polyphen		0.96	.;D;D
Vest4		0.13
MVP		0.52
MPC		0.70
ClinPred		0.087	T
GERP RS		5.1
Varity_R		0.10
gMVP		0.43

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

Other links and lift over

dbSNP: rs200707852; hg19: chr6-43418542;