20-10275548-C-T

Variant names:

• chr20-10275548-C-T
• rs765993629
• NM_130811.4:c.57C>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_130811.4(SNAP25):​c.57C>T​(p.Asp19Asp) variant causes a synonymous change. The variant allele was found at a frequency of 0.00000138 in 1,448,084 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.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: SNAP25 NM_130811.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.63
• Publications: 0 publications found

Genes affected

SNAP25 (HGNC:11132): (synaptosome associated protein 25) Synaptic vesicle membrane docking and fusion is mediated by SNAREs (soluble N-ethylmaleimide-sensitive factor attachment protein receptors) located on the vesicle membrane (v-SNAREs) and the target membrane (t-SNAREs). The assembled v-SNARE/t-SNARE complex consists of a bundle of four helices, one of which is supplied by v-SNARE and the other three by t-SNARE. For t-SNAREs on the plasma membrane, the protein syntaxin supplies one helix and the protein encoded by this gene contributes the other two. Therefore, this gene product is a presynaptic plasma membrane protein involved in the regulation of neurotransmitter release. Two alternative transcript variants encoding different protein isoforms have been described for this gene. [provided by RefSeq, Jul 2008]

SNAP25-AS1 (HGNC:44312): (SNAP25 antisense RNA 1)

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.26).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_130811.4. 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
	SNAP25	NM_130811.4	MANE Select	c.57C>T	p.Asp19Asp	synonymous	Exon 2 of 8	NP_570824.1	P60880-1
	SNAP25	NM_001322902.2		c.57C>T	p.Asp19Asp	synonymous	Exon 2 of 8	NP_001309831.1	P60880-2
	SNAP25	NM_001322903.2		c.57C>T	p.Asp19Asp	synonymous	Exon 3 of 9	NP_001309832.1	P60880-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SNAP25	ENST00000254976.7	TSL:1 MANE Select	c.57C>T	p.Asp19Asp	synonymous	Exon 2 of 8	ENSP00000254976.3	P60880-1
	SNAP25	ENST00000304886.6	TSL:1	c.57C>T	p.Asp19Asp	synonymous	Exon 2 of 8	ENSP00000307341.2	P60880-2
	SNAP25	ENST00000961779.1		c.57C>T	p.Asp19Asp	synonymous	Exon 2 of 9	ENSP00000631838.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000138 AC: 2 AN: 1448084 Hom.: 0 Cov.: 30 AF XY: 0.00000139 AC XY: 1 AN XY: 719504

African (AFR) AF: 0.00 AC: 0 AN: 33286

American (AMR) AF: 0.00 AC: 0 AN: 43556

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25792

East Asian (EAS) AF: 0.00 AC: 0 AN: 39358

South Asian (SAS) AF: 0.00 AC: 0 AN: 83348

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52870

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5708

European-Non Finnish (NFE) AF: 0.00000181 AC: 2 AN: 1104412

Other (OTH) AF: 0.00 AC: 0 AN: 59754

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.26
CADD	Benign	14
DANN	Benign	0.84
PhyloP100		3.6

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

Other links and lift over

dbSNP: rs765993629; hg19: chr20-10256196; COSMIC: COSV99655382;