Variant chr3-121152529-A-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001308330.2(STXBP5L):c.722A>G(p.Lys241Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000206 in 1,456,810 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. K241N) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

STXBP5L
NM_001308330.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 8.47

Variant links:

Genes affected

STXBP5L (HGNC:30757): (syntaxin binding protein 5L) The protein encoded by this gene is similar to syntaxin-binding protein 5 and contains ten N-terminal WD40 repeats, four variable region WD40 repeats, and a C-terminal R-SNARE domain. Studies of the orthologous proteins in mouse and rat have shown that the encoded protein may inhibit exocytosis in neurosecretory cells, and may negatively regulate the secretion of insulin. A missense variant in this gene is likely the cause of an infantile-onset neurodegenerative disorder diagnosed in two siblings of consanguineous parents. [provided by RefSeq, Jan 2017]

STXBP5L links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
STXBP5L	NM_001308330.2 linkuse as main transcript	c.722A>G	p.Lys241Arg	missense_variant	8/27	ENST00000471454.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
STXBP5L	ENST00000471454.6 linkuse as main transcript	c.722A>G	p.Lys241Arg	missense_variant	8/27	2	NM_001308330.2	A1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000816

AC:

AN:

245156

Hom.:

AF XY:

0.00

AC XY:

AN XY:

133322

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000607

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000206

AC:

AN:

1456810

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

724934

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000458

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:

9.01e-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

May 24, 2023

The c.722A>G (p.K241R) alteration is located in exon 8 (coding exon 7) of the STXBP5L gene. This alteration results from a A to G substitution at nucleotide position 722, causing the lysine (K) at amino acid position 241 to be replaced by an arginine (R). 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

0.10

BayesDel_addAF

Benign

-0.15

BayesDel_noAF

Benign

-0.27

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.19

T;T;T;T;.;T

Eigen

Pathogenic

0.70

Eigen_PC

Pathogenic

0.70

FATHMM_MKL

Uncertain

0.95

LIST_S2

Pathogenic

0.99

D;D;D;D;D;D

M_CAP

Benign

0.022

MetaRNN

Uncertain

0.49

T;T;T;T;T;T

MetaSVM

Benign

-0.62

MutationAssessor

Benign

1.1

L;.;.;.;.;.

MutationTaster

Benign

1.0

D;D;D;D;D

PrimateAI

Uncertain

0.73

PROVEAN

Uncertain

-2.5

N;N;D;D;D;N

REVEL

Benign

0.21

Sift

Benign

0.089

T;T;T;T;T;T

Sift4G

Uncertain

0.0080

D;D;D;D;D;D

Polyphen

1.0

D;D;.;.;.;.

Vest4

0.47

MutPred

0.43

Loss of ubiquitination at K241 (P = 0.0192);Loss of ubiquitination at K241 (P = 0.0192);Loss of ubiquitination at K241 (P = 0.0192);Loss of ubiquitination at K241 (P = 0.0192);Loss of ubiquitination at K241 (P = 0.0192);Loss of ubiquitination at K241 (P = 0.0192);

MVP

0.33

MPC

0.52

ClinPred

0.88

GERP RS

5.4

Varity_R

0.31

gMVP

0.52

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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

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