19-12806706-A-G

Position:

• chr19-12806706-A-G

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BA1

The NM_006397.3(RNASEH2A):​c.33A>G​(p.Thr11=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0394 in 1,570,774 control chromosomes in the GnomAD database, including 1,884 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.066 (543 hom., cov: 32)
  • Exomes 𝑓: 0.036 (1341 hom.)
• Consequence: RNASEH2A NM_006397.3 synonymous
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:8
• Conservation: PhyloP100: -1.66

Genes affected

RNASEH2A (HGNC:18518): (ribonuclease H2 subunit A) The protein encoded by this gene is a component of the heterotrimeric type II ribonuclease H enzyme (RNAseH2). RNAseH2 is the major source of ribonuclease H activity in mammalian cells and endonucleolytically cleaves ribonucleotides. It is predicted to remove Okazaki fragment RNA primers during lagging strand DNA synthesis and to excise single ribonucleotides from DNA-DNA duplexes. Mutations in this gene cause Aicardi-Goutieres Syndrome (AGS), a an autosomal recessive neurological disorder characterized by progressive microcephaly and psychomotor retardation, intracranial calcifications, elevated levels of interferon-alpha and white blood cells in the cerebrospinal fluid.[provided by RefSeq, Aug 2009]

THSD8 (HGNC:53785): (thrombospondin type 1 domain containing 8)

HOOK2 (HGNC:19885): (hook microtubule tethering protein 2) Hook proteins are cytosolic coiled-coil proteins that contain conserved N-terminal domains, which attach to microtubules, and more divergent C-terminal domains, which mediate binding to organelles. The Drosophila Hook protein is a component of the endocytic compartment.[supplied by OMIM, Apr 2004]

ACMG classification

Verdict is Benign. Variant got -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BP6: Variant 19-12806706-A-G is Benign according to our data. Variant chr19-12806706-A-G is described in ClinVar as [Benign]. Clinvar id is 259971.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr19-12806706-A-G is described in Lovd as [Benign].
• BP7: Synonymous conserved (PhyloP=-1.65 with no splicing effect.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.143 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RNASEH2A	NM_006397.3	c.33A>G	p.Thr11=	synonymous_variant	1/8	ENST00000221486.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RNASEH2A	ENST00000221486.6	c.33A>G	p.Thr11=	synonymous_variant	1/8	1	NM_006397.3	P1

Frequencies

GnomAD3 genomes AF: 0.0663 AC: 10088 AN: 152178 Hom.: 538 Cov.: 32

Gnomad AFR AF: 0.145

Gnomad AMI AF: 0.0462

Gnomad AMR AF: 0.0703

Gnomad ASJ AF: 0.0427

Gnomad EAS AF: 0.0169

Gnomad SAS AF: 0.0271

Gnomad FIN AF: 0.0283

Gnomad MID AF: 0.0696

Gnomad NFE AF: 0.0315

Gnomad OTH AF: 0.0554

GnomAD3 exomes AF: 0.0467 AC: 8373 AN: 179230 Hom.: 330 AF XY: 0.0423 AC XY: 4048 AN XY: 95796

Gnomad AFR exome AF: 0.139

Gnomad AMR exome AF: 0.104

Gnomad ASJ exome AF: 0.0439

Gnomad EAS exome AF: 0.0168

Gnomad SAS exome AF: 0.0272

Gnomad FIN exome AF: 0.0275

Gnomad NFE exome AF: 0.0302

Gnomad OTH exome AF: 0.0398

GnomAD4 exome AF: 0.0364 AC: 51690 AN: 1418478 Hom.: 1341 Cov.: 31 AF XY: 0.0358 AC XY: 25117 AN XY: 701666

Gnomad4 AFR exome AF: 0.150

Gnomad4 AMR exome AF: 0.101

Gnomad4 ASJ exome AF: 0.0419

Gnomad4 EAS exome AF: 0.0105

Gnomad4 SAS exome AF: 0.0284

Gnomad4 FIN exome AF: 0.0275

Gnomad4 NFE exome AF: 0.0322

Gnomad4 OTH exome AF: 0.0424

GnomAD4 genome AF: 0.0665 AC: 10124 AN: 152296 Hom.: 543 Cov.: 32 AF XY: 0.0657 AC XY: 4895 AN XY: 74476

Gnomad4 AFR AF: 0.146

Gnomad4 AMR AF: 0.0701

Gnomad4 ASJ AF: 0.0427

Gnomad4 EAS AF: 0.0170

Gnomad4 SAS AF: 0.0275

Gnomad4 FIN AF: 0.0283

Gnomad4 NFE AF: 0.0315

Gnomad4 OTH AF: 0.0553

Alfa AF: 0.0455 Hom.: 121

Bravo AF: 0.0745

Asia WGS AF: 0.0320 AC: 112 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:8

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Aicardi-Goutieres syndrome 4 Benign:4

Benign, criteria provided, single submitter	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	Jul 28, 2017	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Feb 01, 2024	- -
Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -
Benign, criteria provided, single submitter	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	Sep 21, 2015	- -

not specified Benign:2

Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -
Benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Mar 29, 2016	Variant identified in a genome or exome case(s) and assessed due to predicted null impact of the variant or pathogenic assertions in the literature or databases. Disclaimer: This variant has not undergone full assessment. The following are preliminary notes: Frequency -

not provided Benign:2

Benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 03, 2015	- -
Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	6.5
DANN	Benign	0.67

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs11554400; hg19: chr19-12917520;