4-2898250-T-A

Position:

• chr4-2898250-T-A

Variant summary

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

The NM_001354761.2(ADD1):​c.808T>A​(p.Tyr270Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ADD1 NM_001354761.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.95

Genes affected

ADD1 (HGNC:243): (adducin 1) Adducins are a family of cytoskeletal proteins encoded by three genes (alpha, beta, and gamma). Adducin acts as a heterodimer of the related alpha, beta, or gamma subunits. The protein encoded by this gene represents the alpha subunit. Alpha- and beta-adducin include a protease-resistant N-terminal region and a protease-sensitive, hydrophilic C-terminal region. Adducin binds with high affinity to Ca(2+)/calmodulin and is a substrate for protein kinases A and C. [provided by RefSeq, Aug 2017]

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, 0.86

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ADD1	NM_001354761.2	c.808T>A	p.Tyr270Asn	missense_variant	7/16	ENST00000683351.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ADD1	ENST00000683351.1	c.808T>A	p.Tyr270Asn	missense_variant	7/16		NM_001354761.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.61
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Uncertain	0.090
CADD	Pathogenic	31
DANN	Uncertain	0.99
DEOGEN2	Benign	0.29	.;.;T;T;T;.;.;T
Eigen	Pathogenic	1.0
Eigen_PC	Pathogenic	0.95
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.97	D;D;D;D;D;D;.;D
M_CAP	Uncertain	0.088	D
MetaRNN	Pathogenic	0.86	D;D;D;D;D;D;D;D
MetaSVM	Uncertain	-0.097	T
MutationAssessor	Pathogenic	4.1	H;H;.;.;.;H;H;H
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.85	D
PROVEAN	Pathogenic	-6.1	D;D;D;D;D;D;D;D
REVEL	Uncertain	0.56
Sift	Uncertain	0.0020	D;D;D;D;D;D;D;D
Sift4G	Uncertain	0.030	D;D;D;D;D;D;D;D
Polyphen		1.0	D;.;.;D;D;.;.;D
Vest4		0.97
MutPred		0.39		Gain of glycosylation at Y273 (P = 0.0237);Gain of glycosylation at Y273 (P = 0.0237);Gain of glycosylation at Y273 (P = 0.0237);Gain of glycosylation at Y273 (P = 0.0237);Gain of glycosylation at Y273 (P = 0.0237);Gain of glycosylation at Y273 (P = 0.0237);Gain of glycosylation at Y273 (P = 0.0237);Gain of glycosylation at Y273 (P = 0.0237);
MVP		0.61
MPC		1.1
ClinPred		1.0	D
GERP RS		5.9
Varity_R		0.79
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: rs4971; hg19: chr4-2899977;