1-158638145-T-C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_003126.4(SPTA1):c.5077A>G(p.Lys1693Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign 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. K1693Q) 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: -0.0140

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 Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.048763156).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SPTA1	NM_003126.4	c.5077A>G	p.Lys1693Glu	missense_variant	36/52	ENST00000643759.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SPTA1	ENST00000643759.2	c.5077A>G	p.Lys1693Glu	missense_variant	36/52		NM_003126.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 42

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.059
BayesDel_addAF	Benign	-0.43	T
BayesDel_noAF	Benign	-0.85
Cadd	Benign	0.0070
Dann	Benign	0.24
DEOGEN2	Benign	0.17	T;T
Eigen	Benign	-1.7
Eigen_PC	Benign	-1.7
FATHMM_MKL	Benign	0.015	N
M_CAP	Benign	0.0058	T
MetaRNN	Benign	0.049	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-1.3	N;N
MutationTaster	Benign	1.0	P;P
PrimateAI	Benign	0.26	T
PROVEAN	Benign	1.9	N;.
REVEL	Benign	0.028
Sift	Benign	1.0	T;.
Sift4G	Benign	1.0	T;.
Polyphen		0.0	B;B
Vest4		0.033
MutPred		0.40		Loss of MoRF binding (P = 0.0071);Loss of MoRF binding (P = 0.0071);
MVP		0.43
MPC		0.033
ClinPred		0.061	T
GERP RS		-5.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.26
gMVP		0.044

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: rs857725; hg19: chr1-158607935;