Variant chr20-1305360-T-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_001318234.2(SNPH):c.923T>C(p.Leu308Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,459,990 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 Uncertain significance (★).

Frequency

Genomes: not found (cov: 34)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

SNPH
NM_001318234.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.22

Variant links:

Genes affected

SNPH (HGNC:15931): (syntaphilin) Syntaxin-1, synaptobrevin/VAMP, and SNAP25 interact to form the SNARE complex, which is required for synaptic vesicle docking and fusion. The protein encoded by this gene is membrane-associated and inhibits SNARE complex formation by binding free syntaxin-1. Expression of this gene appears to be brain-specific. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Dec 2015]

SNPH links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.33847445).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SNPH	NM_001318234.2 linkuse as main transcript	c.923T>C	p.Leu308Pro	missense_variant	7/7	ENST00000381867.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SNPH	ENST00000381867.6 linkuse as main transcript	c.923T>C	p.Leu308Pro	missense_variant	7/7	1	NM_001318234.2	P3	O15079-2
SNPH	ENST00000614659.1 linkuse as main transcript	c.923T>C	p.Leu308Pro	missense_variant	4/4	1		P3	O15079-2
SNPH	ENST00000381873.7 linkuse as main transcript	c.791T>C	p.Leu264Pro	missense_variant	6/6	1		A1	O15079-1
SNPH	ENST00000649598.1 linkuse as main transcript	c.890T>C	p.Leu297Pro	missense_variant	6/6			A2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1459990

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726338

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 06, 2023

The c.791T>C (p.L264P) alteration is located in exon 6 (coding exon 4) of the SNPH gene. This alteration results from a T to C substitution at nucleotide position 791, causing the leucine (L) at amino acid position 264 to be replaced by a proline (P). 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

0.17

BayesDel_addAF

Uncertain

0.12

BayesDel_noAF

Uncertain

-0.070

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.33

.;T;.;.

Eigen

Uncertain

0.39

Eigen_PC

Uncertain

0.36

FATHMM_MKL

Uncertain

0.88

LIST_S2

Benign

0.67

T;T;.;T

M_CAP

Benign

0.022

MetaRNN

Benign

0.34

T;T;T;T

MetaSVM

Benign

-0.56

MutationAssessor

Benign

1.4

.;L;.;.

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.75

PROVEAN

Benign

-1.8

.;N;N;.

REVEL

Uncertain

0.41

Sift

Benign

0.048

.;D;D;.

Sift4G

Benign

0.29

.;T;T;T

Polyphen

1.0

.;D;D;D

Vest4

0.57, 0.58, 0.59

MutPred

0.28

.;Loss of stability (P = 0.0163);.;.;

MVP

0.20

MPC

1.7

ClinPred

0.82

GERP RS

4.8

Varity_R

0.68

gMVP

0.52

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

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over