Genetic Variant TXLNB:p.Gln543Lys (chr6-139242954-G-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

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

The NM_153235.4(TXLNB):c.1627C>A(p.Gln543Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000341 in 1,613,950 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. 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. Q543H) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000016 ( 0 hom. )

Consequence

TXLNB
NM_153235.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.10

Variant links:

Genes affected

TXLNB (HGNC:21617): (taxilin beta) Predicted to enable syntaxin binding activity. Located in cytoplasm. [provided by Alliance of Genome Resources, Apr 2022]

TXLNB links:

ENSG00000272446 (HGNC:):

ENSG00000272446 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=0.016305357).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TXLNB	NM_153235.4 link	c.1627C>A	p.Gln543Lys	missense_variant	Exon 10 of 10	ENST00000358430.8	NP_694967.3	Q8N3L3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TXLNB	ENST00000358430.8 link	c.1627C>A	p.Gln543Lys	missense_variant	Exon 10 of 10	1	NM_153235.4	ENSP00000351206.3		Q8N3L3

Frequencies

GnomAD3 genomes

AF:

0.000204

AC:

AN:

152198

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.0000478

AC:

AN:

250886

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135754

show subpopulations

Gnomad AFR exome

AF:

0.000688

Gnomad AMR exome

AF:

0.0000289

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:

0.0000164

AC:

AN:

1461634

Hom.:

Cov.:

AF XY:

0.00000963

AC XY:

AN XY:

727140

show subpopulations

Gnomad4 AFR exome

AF:

0.000717

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.000204

AC:

AN:

152316

Hom.:

Cov.:

AF XY:

0.000201

AC XY:

AN XY:

74482

show subpopulations

Gnomad4 AFR

AF:

0.000722

Gnomad4 AMR

AF:

0.0000654

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:

0.000225

Hom.:

Bravo

AF:

0.000283

ExAC

AF:

0.0000577

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 30, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1627C>A (p.Q543K) alteration is located in exon 10 (coding exon 9) of the TXLNB gene. This alteration results from a C to A substitution at nucleotide position 1627, causing the glutamine (Q) at amino acid position 543 to be replaced by a lysine (K). 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

0.073

BayesDel_addAF

Benign

-0.61

BayesDel_noAF

Benign

-0.71

CADD

Benign

6.8

DANN

Benign

0.62

DEOGEN2

Benign

0.0034

Eigen

Benign

-0.99

Eigen_PC

Benign

-0.98

FATHMM_MKL

Benign

0.20

LIST_S2

Benign

0.51

M_CAP

Benign

0.0062

MetaRNN

Benign

0.016

MetaSVM

Benign

-0.99

MutationAssessor

Benign

2.0

PrimateAI

Benign

0.26

PROVEAN

Benign

-1.0

REVEL

Benign

0.020

Sift

Benign

0.53

Sift4G

Benign

0.94

Polyphen

0.0050

Vest4

0.070

MVP

0.18

MPC

0.13

ClinPred

0.015

GERP RS

1.8

Varity_R

0.053

gMVP

0.13

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