rs372842480

Variant names:

• chr9-127612433-C-G
• rs372842480
• NM_003165.6:c.30C>G

Your query was ambiguous. Multiple possible variants found:

• chr9-127612433-C-G
• chr9-127612433-C-T

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_003165.6(STXBP1):​c.30C>G​(p.Val10Val) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000692 in 1,444,838 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. V10V) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 30)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: STXBP1 NM_003165.6 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0890
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• developmental and epileptic encephalopathy, 4

  Inheritance: AD, AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
• genetic developmental and epileptic encephalopathy

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
• atypical Rett syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• autosomal dominant non-syndromic intellectual disability

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Dravet syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• infantile spasms

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• undetermined early-onset epileptic encephalopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• autism spectrum disorder

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• intellectual disability

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.54).
• BP7: Synonymous conserved (PhyloP=0.089 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003165.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	STXBP1	NM_003165.6	MANE Plus Clinical	c.30C>G	p.Val10Val	synonymous	Exon 1 of 20	NP_003156.1
	STXBP1	NM_001032221.6	MANE Select	c.30C>G	p.Val10Val	synonymous	Exon 1 of 19	NP_001027392.1
	STXBP1	NM_001374306.2		c.30C>G	p.Val10Val	synonymous	Exon 1 of 19	NP_001361235.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	STXBP1	ENST00000373302.8	TSL:1 MANE Plus Clinical	c.30C>G	p.Val10Val	synonymous	Exon 1 of 20	ENSP00000362399.3
	STXBP1	ENST00000373299.5	TSL:1 MANE Select	c.30C>G	p.Val10Val	synonymous	Exon 1 of 19	ENSP00000362396.2
	STXBP1	ENST00000494254.4	TSL:5	c.30C>G	p.Val10Val	synonymous	Exon 1 of 19	ENSP00000485397.2

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome AF: 6.92e-7 AC: 1 AN: 1444838 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 718602

African (AFR) AF: 0.00 AC: 0 AN: 31594

American (AMR) AF: 0.00 AC: 0 AN: 43560

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25588

East Asian (EAS) AF: 0.00 AC: 0 AN: 38340

South Asian (SAS) AF: 0.0000118 AC: 1 AN: 84414

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51646

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5710

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1104520

Other (OTH) AF: 0.00 AC: 0 AN: 59466

GnomAD4 genome Cov.: 30

Alfa AF: 0.00 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.54
CADD	Benign	15
DANN	Benign	0.72
PhyloP100		0.089
PromoterAI		-0.089	Neutral

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

Other links and lift over

dbSNP: rs372842480; hg19: chr9-130374712;