9-127682406-C-T

Position:

chr9-127682406-C-T

Variant summary

Our verdict is Benign. Variant got -19 ACMG points: 0P and 19B. BP4_ModerateBP6_Very_StrongBP7BS1BS2

The NM_001032221.6(STXBP1):c.1548C>T(p.Ser516Ser) variant causes a splice region, synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00237 in 1,613,966 control chromosomes in the GnomAD database, including 10 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0015 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0025 ( 10 hom. )

Consequence

STXBP1
NM_001032221.6 splice_region, synonymous

Scores

Splicing: ADA: 0.0001158

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:10

Conservation

PhyloP100: 0.530

Variant links:

Genes affected

STXBP1 (HGNC:11444): (syntaxin binding protein 1) This gene encodes a syntaxin-binding protein. The encoded protein appears to play a role in release of neurotransmitters via regulation of syntaxin, a transmembrane attachment protein receptor. Mutations in this gene have been associated with infantile epileptic encephalopathy-4. Alternatively spliced transcript variants have been described. [provided by RefSeq, Feb 2010]

STXBP1 links:

STXBP1 (HGNC:):

STXBP1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -19 ACMG points.

BP4

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

BP6

Variant 9-127682406-C-T is Benign according to our data. Variant chr9-127682406-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 94117.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr9-127682406-C-T is described in Lovd as [Likely_benign].

BP7

Synonymous conserved (PhyloP=0.53 with no splicing effect.

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00148 (226/152322) while in subpopulation NFE AF= 0.0029 (197/68020). AF 95% confidence interval is 0.00256. There are 0 homozygotes in gnomad4. There are 100 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High AC in GnomAd4 at 226 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
STXBP1	NM_003165.6 linkuse as main transcript	c.1548C>T	p.Ser516Ser	splice_region_variant, synonymous_variant	18/20	ENST00000373302.8	NP_003156.1	P61764-2
STXBP1	NM_001032221.6 linkuse as main transcript	c.1548C>T	p.Ser516Ser	splice_region_variant, synonymous_variant	18/19	ENST00000373299.5	NP_001027392.1	P61764-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
STXBP1	ENST00000373302.8 linkuse as main transcript	c.1548C>T	p.Ser516Ser	splice_region_variant, synonymous_variant	18/20	1	NM_003165.6	ENSP00000362399.3		P61764-2
STXBP1	ENST00000373299.5 linkuse as main transcript	c.1548C>T	p.Ser516Ser	splice_region_variant, synonymous_variant	18/19	1	NM_001032221.6	ENSP00000362396.2		P61764-1

Frequencies

GnomAD3 genomes

AF:

0.00148

AC:

226

AN:

152204

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000362

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000589

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000622

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00290

Gnomad OTH

AF:

0.000956

GnomAD3 exomes

AF:

0.00134

AC:

336

AN:

251040

Hom.:

AF XY:

0.00133

AC XY:

180

AN XY:

135830

show subpopulations

Gnomad AFR exome

AF:

0.000186

Gnomad AMR exome

AF:

0.000405

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00101

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00249

Gnomad OTH exome

AF:

0.000816

GnomAD4 exome

AF:

0.00246

AC:

3595

AN:

1461644

Hom.:

Cov.:

AF XY:

0.00241

AC XY:

1755

AN XY:

727134

show subpopulations

Gnomad4 AFR exome

AF:

0.000269

Gnomad4 AMR exome

AF:

0.000402

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.00121

Gnomad4 FIN exome

AF:

0.000113

Gnomad4 NFE exome

AF:

0.00301

Gnomad4 OTH exome

AF:

0.00157

GnomAD4 genome

AF:

0.00148

AC:

226

AN:

152322

Hom.:

Cov.:

AF XY:

0.00134

AC XY:

100

AN XY:

74478

show subpopulations

Gnomad4 AFR

AF:

0.000361

Gnomad4 AMR

AF:

0.000588

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000622

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00290

Gnomad4 OTH

AF:

0.000946

Alfa

AF:

0.00197

Hom.:

Bravo

AF:

0.00144

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.00256

EpiControl

AF:

0.00284

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:10

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:4

Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Nov 01, 2024	STXBP1: BP4, BP7 -
Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Likely benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -

not specified

Benign:3

Likely benign, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Feb 22, 2017	- -
Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jan 07, 2016	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Feb 23, 2012	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 29, 2023

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Early infantile epileptic encephalopathy with suppression bursts

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 29, 2024

- -

Developmental and epileptic encephalopathy, 4

Benign:1

Likely benign, no assertion criteria provided

clinical testing

Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.32

CADD

Benign

DANN

Benign

0.77

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00012

dbscSNV1_RF

Benign

0.050

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