rs121918650

Positions:

• chr14-64767691-C-G
• chr14-64767691-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3 PP5

The NM_001355436.2(SPTB):​c.6191G>C​(p.Arg2064Pro) 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. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 33)
• Consequence: SPTB NM_001355436.2 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 7.87

Genes affected

SPTB (HGNC:11274): (spectrin beta, erythrocytic) This locus encodes a member of the spectrin gene family. Spectrin proteins, along with ankyrin, play a role in cell membrane organization and stability. The protein encoded by this locus functions in stability of erythrocyte membranes, and mutations in this gene have been associated with spherocytosis type 2, hereditary elliptocytosis, and neonatal hemolytic anemia. Alternatively spliced transcript variants have been described. [provided by RefSeq, Nov 2009]

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, 0.819
• PP5: Variant 14-64767691-C-G is Pathogenic according to our data. Variant chr14-64767691-C-G is described in ClinVar as [Pathogenic]. Clinvar id is 12840.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SPTB	NM_001355436.2	c.6191G>C	p.Arg2064Pro	missense_variant	30/36	ENST00000644917.1	NP_001342365.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SPTB	ENST00000644917.1	c.6191G>C	p.Arg2064Pro	missense_variant	30/36		NM_001355436.2	ENSP00000495909	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Elliptocytosis 3 Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

May 01, 1997

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.96
BayesDel_addAF	Pathogenic	0.35	D
BayesDel_noAF	Pathogenic	0.26
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Benign	0.28	.;.;.;T;D;D
Eigen	Pathogenic	0.84
Eigen_PC	Pathogenic	0.79
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	0.99	.;.;D;D;.;D
M_CAP	Benign	0.064	D
MetaRNN	Pathogenic	0.82	D;D;D;D;D;D
MetaSVM	Uncertain	-0.17	T
MutationAssessor	Pathogenic	3.4	M;M;M;.;M;M
MutationTaster	Benign	1.0	A;A;A;A;A
PrimateAI	Uncertain	0.64	T
PROVEAN	Pathogenic	-6.4	D;.;D;D;D;D
REVEL	Pathogenic	0.70
Sift	Uncertain	0.0010	D;.;D;D;D;D
Sift4G	Pathogenic	0.0	D;.;D;D;D;D
Polyphen		1.0	.;.;.;.;D;D
Vest4		0.97
MutPred		0.46		Gain of catalytic residue at R2064 (P = 0.0202);Gain of catalytic residue at R2064 (P = 0.0202);Gain of catalytic residue at R2064 (P = 0.0202);.;Gain of catalytic residue at R2064 (P = 0.0202);Gain of catalytic residue at R2064 (P = 0.0202);
MVP		0.86
MPC		0.92
ClinPred		1.0	D
GERP RS		5.1
Varity_R		0.98
gMVP		0.86

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: rs121918650; hg19: chr14-65234409;