chr6-166929679-C-G

Position:

• chr6-166929679-C-G

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2 BP4_Strong BS1_Supporting

The NM_003730.6(RNASET2):​c.680G>C​(p.Trp227Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000756 in 1,614,138 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 (★).

• Frequency:
  • Genomes: 𝑓 0.00047 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000035 (0 hom.)
• Consequence: RNASET2 NM_003730.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.134

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]

ACMG classification

Verdict is Likely_benign. Variant got -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.019907206).
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000466 (71/152280) while in subpopulation AFR AF= 0.00152 (63/41564). AF 95% confidence interval is 0.00122. There are 0 homozygotes in gnomad4. There are 38 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RNASET2	NM_003730.6	c.680G>C	p.Trp227Ser	missense_variant	9/9	ENST00000508775.6	NP_003721.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RNASET2	ENST00000508775.6	c.680G>C	p.Trp227Ser	missense_variant	9/9	1	NM_003730.6	ENSP00000426455	P1

Frequencies

GnomAD3 genomes AF: 0.000453 AC: 69 AN: 152162 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00147

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000458

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: 0.0000147

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000119 AC: 30 AN: 251428 Hom.: 0 AF XY: 0.0000736 AC XY: 10 AN XY: 135908

Gnomad AFR exome AF: 0.00154

Gnomad AMR exome AF: 0.0000867

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: 0.0000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000349 AC: 51 AN: 1461858 Hom.: 0 Cov.: 31 AF XY: 0.0000316 AC XY: 23 AN XY: 727228

Gnomad4 AFR exome AF: 0.00114

Gnomad4 AMR exome AF: 0.0000671

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: 0.00000180

Gnomad4 OTH exome AF: 0.000116

GnomAD4 genome AF: 0.000466 AC: 71 AN: 152280 Hom.: 0 Cov.: 33 AF XY: 0.000510 AC XY: 38 AN XY: 74460

Gnomad4 AFR AF: 0.00152

Gnomad4 AMR AF: 0.000458

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000793 Hom.: 0

Bravo AF: 0.000604

ESP6500AA AF: 0.00204 AC: 9

ESP6500EA AF: 0.000116 AC: 1

ExAC AF: 0.000132 AC: 16

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 21, 2023

This sequence change replaces tryptophan, which is neutral and slightly polar, with serine, which is neutral and polar, at codon 227 of the RNASET2 protein (p.Trp227Ser). This variant is present in population databases (rs145013301, gnomAD 0.1%). This variant has not been reported in the literature in individuals affected with RNASET2-related conditions. ClinVar contains an entry for this variant (Variation ID: 1501895). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.077
BayesDel_addAF	Benign	-0.35	T
BayesDel_noAF	Benign	-0.30
CADD	Benign	4.0
DANN	Benign	0.64
DEOGEN2	Benign	0.014	.;T;T;T;T
Eigen	Benign	-1.0
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.062	N
LIST_S2	Benign	0.46	T;.;T;T;T
M_CAP	Benign	0.014	T
MetaRNN	Benign	0.020	T;T;T;T;T
MetaSVM	Benign	-0.94	T
MutationAssessor	Uncertain	2.0	.;M;.;M;.
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Benign	0.26	T
PROVEAN	Uncertain	-2.6	D;N;.;N;N
REVEL	Benign	0.21
Sift	Benign	0.41	T;T;.;T;T
Sift4G	Benign	0.73	T;T;T;T;.
Polyphen		0.36	.;B;.;B;.
Vest4		0.19
MVP		0.60
MPC		0.37
ClinPred		0.040	T
GERP RS		-1.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.14
gMVP		0.68

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: rs145013301; hg19: chr6-167343167;