8-120548896-G-A

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3

The NM_021021.4(SNTB1):c.1199C>T(p.Thr400Met) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000174 in 1,612,372 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000017 ( 0 hom. )

Consequence

SNTB1
NM_021021.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 8.13

Variant links:

Genes affected

SNTB1 (HGNC:11168): (syntrophin beta 1) Dystrophin is a large, rod-like cytoskeletal protein found at the inner surface of muscle fibers. Dystrophin is missing in Duchenne Muscular Dystrophy patients and is present in reduced amounts in Becker Muscular Dystrophy patients. The protein encoded by this gene is a peripheral membrane protein found associated with dystrophin and dystrophin-related proteins. This gene is a member of the syntrophin gene family, which contains at least two other structurally-related genes. [provided by RefSeq, Jul 2008]

SNTB1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.761

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SNTB1	NM_021021.4 link	c.1199C>T	p.Thr400Met	missense_variant	Exon 5 of 7	ENST00000517992.2	NP_066301.1	Q13884-1
SNTB1	XM_047422126.1 link	c.620C>T	p.Thr207Met	missense_variant	Exon 5 of 7		XP_047278082.1
SNTB1	XM_047422127.1 link	c.620C>T	p.Thr207Met	missense_variant	Exon 5 of 7		XP_047278083.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SNTB1	ENST00000517992.2 link	c.1199C>T	p.Thr400Met	missense_variant	Exon 5 of 7	1	NM_021021.4	ENSP00000431124.1	Q13884-1
SNTB1	ENST00000395601.7 link	c.1199C>T	p.Thr400Met	missense_variant	Exon 6 of 8	5		ENSP00000378965.3	Q13884-1
SNTB1	ENST00000648490.1 link	n.*75C>T		non_coding_transcript_exon_variant	Exon 6 of 8			ENSP00000497707.1	A0A3B3ITC2
SNTB1	ENST00000648490.1 link	n.*75C>T		3_prime_UTR_variant	Exon 6 of 8			ENSP00000497707.1	A0A3B3ITC2

Frequencies

GnomAD3 genomes

AF:

0.0000198

AC:

AN:

151834

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000241

AC:

AN:

249132

Hom.:

AF XY:

0.0000372

AC XY:

AN XY:

134520

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000290

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000163

Gnomad SAS exome

AF:

0.0000330

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000890

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000171

AC:

AN:

1460538

Hom.:

Cov.:

AF XY:

0.0000220

AC XY:

AN XY:

726522

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000756

Gnomad4 SAS exome

AF:

0.0000581

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000135

Gnomad4 OTH exome

AF:

0.0000332

GnomAD4 genome

AF:

0.0000198

AC:

AN:

151834

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74156

show subpopulations

Gnomad4 AFR

AF:

0.0000242

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000151

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000594

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 17, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1199C>T (p.T400M) alteration is located in exon 5 (coding exon 5) of the SNTB1 gene. This alteration results from a C to T substitution at nucleotide position 1199, causing the threonine (T) at amino acid position 400 to be replaced by a methionine (M). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.19

BayesDel_addAF

Uncertain

0.019

BayesDel_noAF

Uncertain

0.050

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.60

D;D

Eigen

Uncertain

0.57

Eigen_PC

Uncertain

0.53

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.91

.;D

M_CAP

Benign

0.031

MetaRNN

Pathogenic

0.76

D;D

MetaSVM

Benign

-0.95

MutationAssessor

Uncertain

2.4

M;M

PrimateAI

Uncertain

0.61

PROVEAN

Benign

-2.1

N;N

REVEL

Benign

0.18

Sift

Benign

0.11

T;T

Sift4G

Benign

0.11

T;T

Polyphen

0.99

D;D

Vest4

0.86

MutPred

0.41

Loss of phosphorylation at T400 (P = 0.0561);Loss of phosphorylation at T400 (P = 0.0561);

MVP

0.31

ClinPred

0.49

GERP RS

5.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.11

gMVP

0.71

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over