dbSNP rs150313069: STX1B:p.Ala279Ala (chr16-30992851-C-T) – ACMG Classification: Benign (-15 pts)

Variant summary

Our verdict is Benign. The variant received -15 ACMG points: 0P and 15B. BP4_ModerateBP6_Very_StrongBP7BS2

The NM_052874.5(STX1B):c.837G>A(p.Ala279Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000655 in 1,613,830 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.00060 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00066 ( 0 hom. )

Consequence

STX1B
NM_052874.5 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: -0.0870

Publications

0 publications found

Variant links:

Genes affected

STX1B (HGNC:18539): (syntaxin 1B) The protein encoded by this gene belongs to a family of proteins thought to play a role in the exocytosis of synaptic vesicles. Vesicle exocytosis releases vesicular contents and is important to various cellular functions. For instance, the secretion of transmitters from neurons plays an important role in synaptic transmission. After exocytosis, the membrane and proteins from the vesicle are retrieved from the plasma membrane through the process of endocytosis. Mutations in this gene have been identified as one cause of fever-associated epilepsy syndromes. A possible link between this gene and Parkinson's disease has also been suggested. [provided by RefSeq, Jan 2015]

STX1B Gene-Disease associations (from GenCC):

generalized epilepsy with febrile seizures plus
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
generalized epilepsy with febrile seizures plus, type 9
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), PanelApp Australia, G2P

STX1B links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -15 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.32).

BP6

Variant 16-30992851-C-T is Benign according to our data. Variant chr16-30992851-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 542095.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-0.087 with no splicing effect.

BS2

High AC in GnomAd4 at 92 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_052874.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	STX1B	NM_052874.5	MANE Select	c.837G>A	p.Ala279Ala	synonymous	Exon 10 of 10	NP_443106.1	P61266-1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
STX1B	ENST00000215095.11	TSL:1 MANE Select	c.837G>A	p.Ala279Ala	synonymous	Exon 10 of 10	ENSP00000215095.5	P61266-1
STX1B	ENST00000916717.1		c.834G>A	p.Ala278Ala	synonymous	Exon 10 of 10	ENSP00000586776.1
STX1B	ENST00000565419.2	TSL:2	c.*231G>A		downstream_gene	N/A	ENSP00000455899.1	P61266-2

Frequencies

GnomAD3 genomes

AF:

0.000605

AC:

AN:

152062

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00147

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

Gnomad ASJ

AF:

0.000288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000368

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000356

AC:

AN:

250112

AF XY:

0.000332

show subpopulations

Gnomad AFR exome

AF:

0.00130

Gnomad AMR exome

AF:

0.000145

Gnomad ASJ exome

AF:

0.000199

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.000470

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.000660

AC:

965

AN:

1461650

Hom.:

Cov.:

AF XY:

0.000595

AC XY:

433

AN XY:

727128

show subpopulations

African (AFR)

AF:

0.00119

AC:

AN:

33476

American (AMR)

AF:

0.000112

AC:

AN:

44708

Ashkenazi Jewish (ASJ)

AF:

0.000268

AC:

AN:

26128

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39698

South Asian (SAS)

AF:

0.000162

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.0000188

AC:

AN:

53302

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000781

AC:

868

AN:

1111924

Other (OTH)

AF:

0.000480

AC:

AN:

60392

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.480

Heterozygous variant carriers

127

170

212

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

114

152

190

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000605

AC:

AN:

152180

Hom.:

Cov.:

AF XY:

0.000564

AC XY:

AN XY:

74408

show subpopulations

African (AFR)

AF:

0.00147

AC:

AN:

41502

American (AMR)

AF:

0.000262

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.000288

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5168

South Asian (SAS)

AF:

0.000207

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10612

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000368

AC:

AN:

67986

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.504

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000671

Hom.:

Bravo

AF:

0.000786

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000491

EpiControl

AF:

0.000356

ClinVar

ClinVar submissions

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (2)

Generalized epilepsy with febrile seizures plus, type 9 (1)

Inborn genetic diseases (1)

STX1B-related disorder (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.32

CADD

Benign

(source)

DANN

Benign

0.77

PhyloP100

-0.087

Mutation Taster

=98/2

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over