rs7547313

Positions:

• chr1-158662741-T-A
• chr1-158662741-T-C

Variant summary

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

The NM_003126.4(SPTA1):​c.2425A>T​(p.Ile809Phe) 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. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I809V) has been classified as Benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SPTA1 NM_003126.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.58

Genes affected

SPTA1 (HGNC:11272): (spectrin alpha, erythrocytic 1) This gene encodes a member of a family of molecular scaffold proteins that link the plasma membrane to the actin cytoskeleton and functions in the determination of cell shape, arrangement of transmembrane proteins, and organization of organelles. The encoded protein is primarily composed of 22 spectrin repeats which are involved in dimer formation. It forms a component of the erythrocyte plasma membrane. Mutations in this gene result in a variety of hereditary red blood cell disorders, including elliptocytosis-2, pyropoikilocytosis, and spherocytosis, type 3. [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, 0.846

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SPTA1	NM_003126.4	c.2425A>T	p.Ile809Phe	missense_variant	17/52	ENST00000643759.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SPTA1	ENST00000643759.2	c.2425A>T	p.Ile809Phe	missense_variant	17/52		NM_003126.4	P1

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	Uncertain	0.51
BayesDel_addAF	Uncertain	0.11	D
BayesDel_noAF	Uncertain	-0.080
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.61	D;D
Eigen	Pathogenic	0.72
Eigen_PC	Uncertain	0.64
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.96	.;D
M_CAP	Uncertain	0.16	D
MetaRNN	Pathogenic	0.85	D;D
MetaSVM	Benign	-0.66	T
MutationAssessor	Pathogenic	3.3	M;M
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.55	T
PROVEAN	Uncertain	-3.6	D;.
REVEL	Uncertain	0.37
Sift	Pathogenic	0.0	D;.
Sift4G	Uncertain	0.0030	D;.
Polyphen		1.0	D;D
Vest4		0.80
MutPred		0.56		Gain of phosphorylation at T812 (P = 0.1655);Gain of phosphorylation at T812 (P = 0.1655);
MVP		0.71
MPC		0.26
ClinPred		1.0	D
GERP RS		4.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.79
gMVP		0.42

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs7547313; hg19: chr1-158632531;