14-21034061-A-T

Position:

• chr14-21034061-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_001012264.4(RNASE13):​c.228T>A​(p.His76Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,868 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: RNASE13 NM_001012264.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.277

Genes affected

RNASE13 (HGNC:25285): (ribonuclease A family member 13 (inactive)) Predicted to enable nucleic acid binding activity. Predicted to be located in extracellular region. [provided by Alliance of Genome Resources, Apr 2022]

NDRG2 (HGNC:14460): (NDRG family member 2) This gene is a member of the N-myc downregulated gene family which belongs to the alpha/beta hydrolase superfamily. The protein encoded by this gene is a cytoplasmic protein that may play a role in neurite outgrowth. This gene may be involved in glioblastoma carcinogenesis. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2017]

TPPP2 (HGNC:19293): (tubulin polymerization promoting protein family member 2) Enables tubulin binding activity. Involved in regulation of flagellated sperm motility. Located in cytosol. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.919

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RNASE13	NM_001012264.4	c.228T>A	p.His76Gln	missense_variant	Exon 2 of 2	ENST00000382951.4	NP_001012264.1
NDRG2	NM_001282211.2	c.25-10740T>A		intron_variant	Intron 1 of 14		NP_001269140.1
TPPP2	XM_011536416.2	c.328-2130A>T		intron_variant	Intron 3 of 3		XP_011534718.1
TPPP2	XM_011536420.3	c.*13+1681A>T		intron_variant	Intron 4 of 4		XP_011534722.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RNASE13	ENST00000382951.4	c.228T>A	p.His76Gln	missense_variant	Exon 2 of 2	1	NM_001012264.4	ENSP00000372410.3

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461868 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 727240

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: 0.00

Gnomad4 NFE exome AF: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 10, 2022

The c.228T>A (p.H76Q) alteration is located in exon 2 (coding exon 1) of the RNASE13 gene. This alteration results from a T to A substitution at nucleotide position 228, causing the histidine (H) at amino acid position 76 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	Pathogenic	0.94
BayesDel_addAF	Uncertain	0.13	D
BayesDel_noAF	Uncertain	-0.050
CADD	Benign	13
DANN	Benign	0.97
DEOGEN2	Benign	0.32	T
Eigen	Benign	-0.53
Eigen_PC	Benign	-0.80
FATHMM_MKL	Benign	0.027	N
LIST_S2	Benign	0.44	T
M_CAP	Benign	0.058	D
MetaRNN	Pathogenic	0.92	D
MetaSVM	Benign	-0.79	T
MutationAssessor	Benign	2.0	M
PrimateAI	Uncertain	0.56	T
PROVEAN	Pathogenic	-8.0	D
REVEL	Uncertain	0.36
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.81
MutPred		0.68		Gain of catalytic residue at W79 (P = 0.0044);
MVP		0.21
MPC		0.11
ClinPred		0.99	D
GERP RS		-5.6
Varity_R		0.87
gMVP		0.42

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: rs777486503; hg19: chr14-21502220;