3-94014513-T-C

Position:

chr3-94014513-T-C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001001850.3(STX19):c.757A>G(p.Thr253Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000107 in 1,612,416 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00043 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000073 ( 1 hom. )

Consequence

STX19
NM_001001850.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.597

Variant links:

Genes affected

STX19 (HGNC:19300): (syntaxin 19) Predicted to enable SNAP receptor activity and SNARE binding activity. Predicted to be involved in intracellular protein transport; synaptic vesicle fusion to presynaptic active zone membrane; and vesicle docking. Predicted to be part of SNARE complex. Predicted to be active in presynaptic active zone membrane and synaptic vesicle. Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

STX19 links:

ARL13B (HGNC:25419): (ADP ribosylation factor like GTPase 13B) This gene encodes a member of the ADP-ribosylation factor-like family. The encoded protein is a small GTPase that contains both N-terminal and C-terminal guanine nucleotide-binding motifs. This protein is localized in the cilia and plays a role in cilia formation and in maintenance of cilia. Mutations in this gene are the cause of Joubert syndrome 8. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Mar 2010]

ARL13B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.027046978).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
STX19	NM_001001850.3 linkuse as main transcript	c.757A>G	p.Thr253Ala	missense_variant	2/2	ENST00000315099.3
ARL13B	NM_001174150.2 linkuse as main transcript	c.380+10605T>C		intron_variant		ENST00000394222.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
STX19	ENST00000315099.3 linkuse as main transcript	c.757A>G	p.Thr253Ala	missense_variant	2/2	1	NM_001001850.3	P1
ARL13B	ENST00000394222.8 linkuse as main transcript	c.380+10605T>C		intron_variant		1	NM_001174150.2	P1	Q3SXY8-1

Frequencies

GnomAD3 genomes

AF:

0.000401

AC:

AN:

152216

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00147

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000764

AC:

AN:

248594

Hom.:

AF XY:

0.0000521

AC XY:

AN XY:

134360

show subpopulations

Gnomad AFR exome

AF:

0.00111

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000332

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000733

AC:

107

AN:

1460082

Hom.:

Cov.:

AF XY:

0.0000620

AC XY:

AN XY:

726242

show subpopulations

Gnomad4 AFR exome

AF:

0.00153

Gnomad4 AMR exome

AF:

0.0000450

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000816

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000360

Gnomad4 OTH exome

AF:

0.000696

GnomAD4 genome

AF:

0.000433

AC:

AN:

152334

Hom.:

Cov.:

AF XY:

0.000389

AC XY:

AN XY:

74494

show subpopulations

Gnomad4 AFR

AF:

0.00159

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000844

Hom.:

Bravo

AF:

0.000419

ESP6500AA

AF:

0.00136

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000906

AC:

Asia WGS

AF:

0.00231

AC:

AN:

3474

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

Mar 18, 2024

The c.757A>G (p.T253A) alteration is located in exon 2 (coding exon 1) of the STX19 gene. This alteration results from a A to G substitution at nucleotide position 757, causing the threonine (T) at amino acid position 253 to be replaced by an alanine (A). 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

0.078

BayesDel_addAF

Benign

-0.59

BayesDel_noAF

Benign

-0.66

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.033

Eigen

Benign

-0.59

Eigen_PC

Benign

-0.45

FATHMM_MKL

Benign

0.18

LIST_S2

Benign

0.30

M_CAP

Benign

0.0055

MetaRNN

Benign

0.027

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.69

MutationTaster

Benign

0.99

D;D;D;D;D;N

PrimateAI

Benign

0.27

PROVEAN

Benign

-1.6

REVEL

Benign

0.038

Sift

Benign

0.097

Sift4G

Benign

0.49

Polyphen

0.0030

Vest4

0.17

MVP

0.52

MPC

0.0091

ClinPred

0.0091

GERP RS

3.6

Varity_R

0.071

gMVP

0.24

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

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