NM_003730.6:c.710dupG

Variant names:

• chr6-166929648-A-AC
• rs763295910
• NM_003730.6:c.710dupG

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PVS1_Moderate PM2 PP5

The NM_003730.6(RNASET2):​c.710dupG​(p.Leu238SerfsTer5) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000409 in 1,613,054 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.000033 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000042 (0 hom.)
• Consequence: RNASET2 NM_003730.6 frameshift
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1 U:1
• Conservation: PhyloP100: 0.181

Genes affected

RNASET2 (HGNC:21686): (ribonuclease T2) This ribonuclease gene is a novel member of the Rh/T2/S-glycoprotein class of extracellular ribonucleases. It is a single copy gene that maps to 6q27, a region associated with human malignancies and chromosomal rearrangement. [provided by RefSeq, Jul 2008]

ENSG00000249141 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 5 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.0791 CDS is truncated, and there are 0 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 6-166929648-A-AC is Pathogenic according to our data. Variant chr6-166929648-A-AC is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 436545.We mark this variant Likely_pathogenic, oryginal submissions are: {Uncertain_significance=1, Likely_pathogenic=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RNASET2	NM_003730.6	c.710dupG	p.Leu238SerfsTer5	frameshift_variant	Exon 9 of 9	ENST00000508775.6	NP_003721.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RNASET2	ENST00000508775.6	c.710dupG	p.Leu238SerfsTer5	frameshift_variant	Exon 9 of 9	1	NM_003730.6	ENSP00000426455.2
ENSG00000249141	ENST00000507747.1	c.432+4442dupG		intron_variant	Intron 7 of 7	5		ENSP00000426906.1

Frequencies

GnomAD3 genomes AF: 0.0000331 AC: 5 AN: 151166 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000738

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000278 AC: 7 AN: 251430 Hom.: 0 AF XY: 0.0000221 AC XY: 3 AN XY: 135906

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000615

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000417 AC: 61 AN: 1461888 Hom.: 0 Cov.: 31 AF XY: 0.0000440 AC XY: 32 AN XY: 727246

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.0000562

Gnomad4 NFE exome AF: 0.0000504

Gnomad4 OTH exome AF: 0.0000331

GnomAD4 genome AF: 0.0000331 AC: 5 AN: 151166 Hom.: 0 Cov.: 33 AF XY: 0.0000136 AC XY: 1 AN XY: 73762

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000738

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000680 Hom.: 0

Bravo AF: 0.0000491

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1 Uncertain:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Cystic leukoencephalopathy without megalencephaly Pathogenic:1

Nov 17, 2016

Genetic Services Laboratory, University of Chicago

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not specified Uncertain:1

May 30, 2024

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: RNASET2 c.710dupG (p.Leu238SerfsX5) results in a premature termination codon, predicted to cause a truncation of the encoded protein. No downstream pathogenic variants have been reported. The variant allele was found at a frequency of 2.8e-05 in 251430 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.710dupG has been reported in the literature in one individual affected with Cystic leukoencephalopathy without megalencephaly (Kuster_2017, Rice_2017). These data do not allow any conclusion about variant significance. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publications have been ascertained in the context of this evaluation (PMID: 28924877, 27943079). ClinVar contains an entry for this variant (Variation ID: 436545). Based on the evidence outlined above, the variant was classified as uncertain significance. -

Computational scores

Source: dbNSFP v4.3

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: rs763295910; hg19: chr6-167343136;