rs35794454

Variant names:

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_020750.3(XPO5):c.2423C>T(p.Ala808Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000804 in 1,604,178 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 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. A808T) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00017 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000071 ( 0 hom. )

Consequence

XPO5
NM_020750.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.17

Publications

4 publications found

Variant links:

Genes affected

XPO5 (HGNC:17675): (exportin 5) This gene encodes a member of the karyopherin family that is required for the transport of small RNAs and double-stranded RNA-binding proteins from the nucleus to the cytoplasm. The encoded protein translocates cargo through the nuclear pore complex in a RanGTP-dependent process. [provided by RefSeq, Aug 2011]

XPO5 links:

POLR1C (HGNC:20194): (RNA polymerase I and III subunit C) The protein encoded by this gene is a subunit of both RNA polymerase I and RNA polymerase III complexes. The encoded protein is part of the Pol core element. Mutations in this gene have been associated with Treacher Collins syndrome (TCS) and hypomyelinating leukodystrophy 11. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2016]

POLR1C Gene-Disease associations (from GenCC):

hypomyelinating leukodystrophy 11
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
Treacher Collins syndrome 3
Inheritance: AR Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, ClinGen
Treacher-Collins syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
hypomyelination-hypogonadotropic hypogonadism-hypodontia syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

POLR1C links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.018837959).

BS2

High AC in GnomAd4 at 26 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
XPO5	NM_020750.3 link	c.2423C>T	p.Ala808Val	missense_variant	Exon 21 of 32	ENST00000265351.12	NP_065801.1	Q9HAV4
XPO5	NR_144392.2 link	n.2735C>T		non_coding_transcript_exon_variant	Exon 22 of 33
POLR1C	NM_001363658.2 link	c.922+12879G>A		intron_variant	Intron 8 of 9		NP_001350587.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
XPO5	ENST00000265351.12 link	c.2423C>T	p.Ala808Val	missense_variant	Exon 21 of 32	1	NM_020750.3	ENSP00000265351.7		Q9HAV4

Frequencies

GnomAD3 genomes

AF:

0.000171

AC:

AN:

152124

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000483

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:

0.0000882

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000883

AC:

AN:

249182

AF XY:

0.0000888

show subpopulations

Gnomad AFR exome

AF:

0.000258

Gnomad AMR exome

AF:

0.000145

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000556

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000885

Gnomad OTH exome

AF:

0.000165

GnomAD4 exome

AF:

0.0000709

AC:

103

AN:

1451936

Hom.:

Cov.:

AF XY:

0.0000748

AC XY:

AN XY:

722304

show subpopulations

African (AFR)

AF:

0.000482

AC:

AN:

33210

American (AMR)

AF:

0.000158

AC:

AN:

44398

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25862

East Asian (EAS)

AF:

0.0000255

AC:

AN:

39204

South Asian (SAS)

AF:

0.0000467

AC:

AN:

85660

European-Finnish (FIN)

AF:

0.0000191

AC:

AN:

52280

Middle Eastern (MID)

AF:

0.000175

AC:

AN:

5728

European-Non Finnish (NFE)

AF:

0.0000615

AC:

AN:

1105884

Other (OTH)

AF:

0.0000837

AC:

AN:

59710

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.452

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000171

AC:

AN:

152242

Hom.:

Cov.:

AF XY:

0.000188

AC XY:

AN XY:

74448

show subpopulations

African (AFR)

AF:

0.000481

AC:

AN:

41554

American (AMR)

AF:

0.00

AC:

AN:

15290

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5186

South Asian (SAS)

AF:

0.00

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10608

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000882

AC:

AN:

68000

Other (OTH)

AF:

0.00

AC:

AN:

2108

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.502

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000141

Hom.:

Bravo

AF:

0.000212

ESP6500AA

AF:

0.000546

AC:

ESP6500EA

AF:

0.000123

AC:

ExAC

AF:

0.0000828

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 18, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.2423C>T (p.A808V) alteration is located in exon 21 (coding exon 21) of the XPO5 gene. This alteration results from a C to T substitution at nucleotide position 2423, causing the alanine (A) at amino acid position 808 to be replaced by a valine (V). 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

0.085

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.60

CADD

Benign

5.9

(source)

DANN

Benign

0.79

DEOGEN2

Benign

0.10

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.093

LIST_S2

Benign

0.77

M_CAP

Benign

0.0057

MetaRNN

Benign

0.019

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-0.34

PhyloP100

2.2

PrimateAI

Benign

0.29

PROVEAN

Benign

-1.2

REVEL

Benign

0.073

Sift

Benign

0.57

Sift4G

Benign

0.47

Polyphen

0.0020

Vest4

0.073

MVP

0.12

MPC

0.37

ClinPred

0.016

GERP RS

-1.6

Varity_R

0.063

gMVP

0.21

Mutation Taster

=81/19

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over