10-1184973-C-T

Variant names:

• chr10-1184973-C-T
• rs777784484
• NM_018702.4:c.1931G>A

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_018702.4(ADARB2):​c.1931G>A​(p.Gly644Asp) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000186 in 1,613,704 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 (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G644A) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 34)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: ADARB2 NM_018702.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.71
• Publications: 0 publications found

Genes affected

ADARB2 (HGNC:227): (adenosine deaminase RNA specific B2 (inactive)) This gene encodes a member of the double-stranded RNA adenosine deaminase family of RNA-editing enzymes and may play a regulatory role in RNA editing. [provided by RefSeq, Jul 2008]

LINC00200 (HGNC:30974): (long intergenic non-protein coding RNA 200)

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.951

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_018702.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ADARB2	NM_018702.4	MANE Select	c.1931G>A	p.Gly644Asp	missense	Exon 9 of 10	NP_061172.1	Q9NS39-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ADARB2	ENST00000381312.6	TSL:1 MANE Select	c.1931G>A	p.Gly644Asp	missense	Exon 9 of 10	ENSP00000370713.1	Q9NS39-1
	ADARB2	ENST00000381310.7	TSL:1	c.458G>A	p.Gly153Asp	missense	Exon 2 of 3	ENSP00000370711.3	Q9NS39-2
	ADARB2	ENST00000474762.5	TSL:1	n.131G>A		non_coding_transcript_exon	Exon 2 of 3

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152266 Hom.: 0 Cov.: 34

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.000288

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461438 Hom.: 0 Cov.: 30 AF XY: 0.00000275 AC XY: 2 AN XY: 727078

African (AFR) AF: 0.00 AC: 0 AN: 33474

American (AMR) AF: 0.00 AC: 0 AN: 44716

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26116

East Asian (EAS) AF: 0.00 AC: 0 AN: 39696

South Asian (SAS) AF: 0.00 AC: 0 AN: 86248

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53104

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5714

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111982

Other (OTH) AF: 0.00 AC: 0 AN: 60388

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152266 Hom.: 0 Cov.: 34 AF XY: 0.0000134 AC XY: 1 AN XY: 74390

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 41480

American (AMR) AF: 0.00 AC: 0 AN: 15294

Ashkenazi Jewish (ASJ) AF: 0.000288 AC: 1 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5190

South Asian (SAS) AF: 0.00 AC: 0 AN: 4838

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10630

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68042

Other (OTH) AF: 0.00 AC: 0 AN: 2094

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Pathogenic	0.47	D
BayesDel_noAF	Pathogenic	0.43
CADD	Benign	23
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.49	T
Eigen	Uncertain	0.46
Eigen_PC	Uncertain	0.41
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.88	D
M_CAP	Uncertain	0.19	D
MetaRNN	Pathogenic	0.95	D
MetaSVM	Pathogenic	0.87	D
MutationAssessor	Uncertain	2.7	M
PhyloP100		7.7
PrimateAI	Uncertain	0.65	T
PROVEAN	Pathogenic	-5.2	D
REVEL	Pathogenic	0.85
Sift	Benign	0.057	T
Sift4G	Benign	0.10	T
Polyphen		0.81	P
Vest4		0.90
MutPred		0.70		Gain of catalytic residue at G644 (P = 0.0075)
MVP		0.90
MPC		1.1
ClinPred		0.99	D
GERP RS		4.8
Varity_R		0.65
gMVP		0.78
Mutation Taster		=34/66	disease causing

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

Other links and lift over

dbSNP: rs777784484; hg19: chr10-1230913;