rs398122893

Positions:

• chr1-154589817-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP2 PP5

The NM_001111.5(ADAR):​c.2608G>A​(p.Ala870Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (no stars). Synonymous variant affecting the same amino acid position (i.e. A870A) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 31)
• Consequence: ADAR NM_001111.5 missense
• Clinical Significance: Pathogenic/Likely pathogenic no assertion criteria provided P:2
• Conservation: PhyloP100: 7.39

Genes affected

ADAR (HGNC:225): (adenosine deaminase RNA specific) This gene encodes the enzyme responsible for RNA editing by site-specific deamination of adenosines. This enzyme destabilizes double-stranded RNA through conversion of adenosine to inosine. Mutations in this gene have been associated with dyschromatosis symmetrica hereditaria. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), ADAR. . Gene score misZ 2.2714 (greater than the threshold 3.09). Trascript score misZ 3.4067 (greater than threshold 3.09). GenCC has associacion of gene with dyschromatosis symmetrica hereditaria, Aicardi-Goutieres syndrome, Aicardi-Goutieres syndrome 6, Leigh syndrome, familial infantile bilateral striatal necrosis.
• PP5: Variant 1-154589817-C-T is Pathogenic according to our data. Variant chr1-154589817-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 39456.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr1-154589817-C-T is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ADAR	NM_001111.5	c.2608G>A	p.Ala870Thr	missense_variant	8/15	ENST00000368474.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ADAR	ENST00000368474.9	c.2608G>A	p.Ala870Thr	missense_variant	8/15	1	NM_001111.5	P3

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 31

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:2

Revision: no assertion criteria provided

Submissions by phenotype

Aicardi-Goutieres syndrome 6 Pathogenic:2

Likely pathogenic, no assertion criteria provided	literature only	ClinVar Staff, National Center for Biotechnology Information (NCBI)	Jun 27, 2013	- -
Pathogenic, no assertion criteria provided	literature only	OMIM	Nov 01, 2012	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.97
BayesDel_addAF	Pathogenic	0.27	D
BayesDel_noAF	Pathogenic	0.15
CADD	Pathogenic	29
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.93	D;.;D;.;.;.;.;.;.;.
Eigen	Uncertain	0.68
Eigen_PC	Pathogenic	0.69
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Pathogenic	0.98	.;.;D;.;.;.;.;.;D;D
M_CAP	Benign	0.055	D
MetaRNN	Uncertain	0.70	D;D;D;D;D;D;D;D;D;D
MetaSVM	Benign	-0.85	T
MutationAssessor	Benign	1.7	L;.;L;.;.;.;.;.;.;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.60	T
PROVEAN	Uncertain	-3.6	D;.;.;.;D;.;.;.;.;.
REVEL	Uncertain	0.48
Sift	Pathogenic	0.0	D;.;.;.;D;.;.;.;.;.
Sift4G	Uncertain	0.0030	D;.;.;.;D;.;.;.;.;.
Polyphen		1.0	D;.;D;.;.;.;.;.;.;D
Vest4		0.92
MutPred		0.39		Loss of stability (P = 0.1127);.;Loss of stability (P = 0.1127);.;.;.;.;.;.;.;
MVP		0.86
MPC		2.0
ClinPred		1.0	D
GERP RS		5.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.8
Varity_R		0.78
gMVP		0.93

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: rs398122893; hg19: chr1-154562293;