NM_020207.7:c.7C>G

Variant names:

• chr9-95876045-C-G
• rs776425022
• NM_020207.7:c.7C>G

Variant summary

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

The NM_020207.7(ERCC6L2):​c.7C>G​(p.Pro3Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000696 in 1,436,444 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/18 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.0e-7 (0 hom.)
• Consequence: ERCC6L2 NM_020207.7 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.319

Genes affected

ERCC6L2 (HGNC:26922): (ERCC excision repair 6 like 2) This gene encodes a member of the Snf2 family of helicase-like proteins. The encoded protein may play a role in DNA repair and mitochondrial function. Mutations in this gene have been associated with bone marrow failure syndrome 2. Alternatively spliced transcript variants that encode different protein isoforms have been described. [provided by RefSeq, Apr 2014]

ERCC6L2-AS1 (HGNC:27858): (ERCC6L2 antisense RNA 1)

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=0.02424705).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ERCC6L2	NM_020207.7	c.7C>G	p.Pro3Ala	missense_variant	Exon 1 of 19	ENST00000653738.2	NP_064592.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ERCC6L2	ENST00000653738.2	c.7C>G	p.Pro3Ala	missense_variant	Exon 1 of 19		NM_020207.7	ENSP00000499221.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.96e-7 AC: 1 AN: 1436444 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 712442

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000239

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000835 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Dec 21, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.P3A variant (also known as c.7C>G), located in coding exon 1 of the ERCC6L2 gene, results from a C to G substitution at nucleotide position 7. The proline at codon 3 is replaced by alanine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Based on the available evidence, the clinical significance of this variant remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Uncertain	0.020	T
BayesDel_noAF	Benign	-0.21
CADD	Benign	5.6
DANN	Benign	0.66
Eigen	Benign	-1.4
Eigen_PC	Benign	-1.5
FATHMM_MKL	Benign	0.0021	N
LIST_S2	Benign	0.38	T
M_CAP	Benign	0.018	T
MetaRNN	Benign	0.024	T
MetaSVM	Benign	-0.70	T
PrimateAI	Benign	0.39	T
PROVEAN	Benign	0.070	N
REVEL	Benign	0.26
Sift	Benign	0.51	T
Sift4G	Benign	0.21	T
Vest4		0.13
MutPred		0.064		Loss of glycosylation at P14 (P = 0.064);
MVP		0.22
MPC		0.21
ClinPred		0.11	T
GERP RS		-1.9
gMVP		0.099

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: rs776425022; hg19: chr9-98638327;