Variant chr19-7620361-C-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_020196.3(XAB2):c.2180G>A(p.Arg727Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000479 in 1,461,044 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000048 ( 0 hom. )

Consequence

XAB2
NM_020196.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.07

Variant links:

Genes affected

XAB2 (HGNC:14089): (XPA binding protein 2) Involved in mRNA splicing, via spliceosome; transcription, DNA-templated; and transcription-coupled nucleotide-excision repair. Located in nucleoplasm. Part of U2-type catalytic step 2 spliceosome. [provided by Alliance of Genome Resources, Apr 2022]

XAB2 links:

XAB2 (HGNC:):

XAB2 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.22257787).

BS2

High AC in GnomAdExome4 at 7 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
XAB2	NM_020196.3 linkuse as main transcript	c.2180G>A	p.Arg727Gln	missense_variant	16/19	ENST00000358368.5	NP_064581.2	Q9HCS7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
XAB2	ENST00000358368.5 linkuse as main transcript	c.2180G>A	p.Arg727Gln	missense_variant	16/19	1	NM_020196.3	ENSP00000351137.3	Q9HCS7
XAB2	ENST00000595288.5 linkuse as main transcript	n.4008G>A		non_coding_transcript_exon_variant	9/11	2
XAB2	ENST00000600230.1 linkuse as main transcript	n.663G>A		non_coding_transcript_exon_variant	3/3	3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000399

AC:

AN:

250508

Hom.:

AF XY:

0.00000738

AC XY:

AN XY:

135582

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000479

AC:

AN:

1461044

Hom.:

Cov.:

AF XY:

0.00000825

AC XY:

AN XY:

726844

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:

0.0000116

Gnomad4 FIN exome

AF:

0.0000190

Gnomad4 NFE exome

AF:

0.00000450

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

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

Apr 09, 2024

The c.2180G>A (p.R727Q) alteration is located in exon 16 (coding exon 16) of the XAB2 gene. This alteration results from a G to A substitution at nucleotide position 2180, causing the arginine (R) at amino acid position 727 to be replaced by a glutamine (Q). 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

0.25

BayesDel_addAF

Benign

-0.19

BayesDel_noAF

Benign

-0.51

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.28

Eigen

Benign

-0.091

Eigen_PC

Benign

-0.054

FATHMM_MKL

Benign

0.36

LIST_S2

Pathogenic

0.99

M_CAP

Benign

0.067

MetaRNN

Benign

0.22

MetaSVM

Benign

-0.90

MutationAssessor

Benign

1.6

PrimateAI

Uncertain

0.63

PROVEAN

Benign

-1.4

REVEL

Benign

0.14

Sift

Uncertain

0.0030

Sift4G

Uncertain

0.041

Polyphen

0.69

Vest4

0.30

MutPred

0.55

Loss of MoRF binding (P = 0.0449);

MVP

0.082

MPC

0.72

ClinPred

0.59

GERP RS

3.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.15

gMVP

0.74

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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