Genetic Variant SPTBN1:p.Ser2184Thr (chr2-54664583-G-C) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 2P and 6B. PM1BP4_ModerateBS1

The NM_003128.3(SPTBN1):c.6551G>C(p.Ser2184Thr) variant causes a missense change. The variant allele was found at a frequency of 0.00000274 in 1,461,888 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 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. S2184N) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

SPTBN1
NM_003128.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 3.74

Publications

2 publications found

Variant links:

Genes affected

SPTBN1 (HGNC:11275): (spectrin beta, non-erythrocytic 1) Spectrin is an actin crosslinking and molecular scaffold protein that links the plasma membrane to the actin cytoskeleton, and functions in the determination of cell shape, arrangement of transmembrane proteins, and organization of organelles. It is composed of two antiparallel dimers of alpha- and beta- subunits. This gene is one member of a family of beta-spectrin genes. The encoded protein contains an N-terminal actin-binding domain, and 17 spectrin repeats which are involved in dimer formation. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

SPTBN1 links:

SPTBN1-AS2 (HGNC:40563): (SPTBN1 antisense RNA 2)

SPTBN1-AS2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

PM1

In a modified_residue Phosphoserine (size 0) in uniprot entity SPTB2_HUMAN

BP4

Computational evidence support a benign effect (MetaRNN=0.12475377).

BS1

Variant frequency is greater than expected in population mid. GnomAdExome4 allele frequency = 0.00000274 (4/1461888) while in subpopulation MID AF = 0.00052 (3/5768). AF 95% confidence interval is 0.000141. There are 0 homozygotes in GnomAdExome4. There are 4 alleles in the male GnomAdExome4 subpopulation. Median coverage is 30. This position passed quality control check.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SPTBN1	NM_003128.3 link	c.6551G>C	p.Ser2184Thr	missense_variant	Exon 33 of 36	ENST00000356805.9	NP_003119.2	Q01082-1B2ZZ89

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SPTBN1	ENST00000356805.9 link	c.6551G>C	p.Ser2184Thr	missense_variant	Exon 33 of 36	1	NM_003128.3	ENSP00000349259.4	Q01082-1
SPTBN1	ENST00000467371.1 link	n.1683G>C		non_coding_transcript_exon_variant	Exon 1 of 4	2
SPTBN1-AS2	ENST00000626206.1 link	n.466+15C>G		intron_variant	Intron 2 of 3	5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.0000119

AC:

AN:

251458

AF XY:

0.0000147

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461888

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

727244

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.000520

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1112006

Other (OTH)

AF:

0.0000166

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.000130

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.00000824

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.064

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.49

CADD

Benign

(source)

DANN

Benign

0.84

DEOGEN2

Benign

0.37

T;T

Eigen

Benign

-0.17

Eigen_PC

Benign

0.072

FATHMM_MKL

Uncertain

0.80

LIST_S2

Benign

0.68

T;T

M_CAP

Benign

0.0032

MetaRNN

Benign

0.12

T;T

MetaSVM

Benign

-0.97

MutationAssessor

Benign

0.34

N;.

PhyloP100

3.7

PrimateAI

Uncertain

0.56

PROVEAN

Benign

-0.65

N;.

REVEL

Benign

0.072

Sift

Benign

0.57

T;.

Sift4G

Benign

0.59

T;T

Polyphen

0.0

B;.

Vest4

0.17

MutPred

0.13

Loss of phosphorylation at S2184 (P = 0.0708);.;

MVP

0.54

MPC

0.32

ClinPred

0.16

GERP RS

5.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.083

gMVP

0.18

Mutation Taster

=89/11

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over