6-43524532-T-G

Variant names:

• chr6-43524532-T-G
• rs201491980
• NM_020750.3:c.3416A>C

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_Moderate BS2

The NM_020750.3(XPO5):​c.3416A>C​(p.Gln1139Pro) variant causes a missense change. The variant allele was found at a frequency of 0.000204 in 1,613,862 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.00012 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00021 (0 hom.)
• Consequence: XPO5 NM_020750.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.57

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]

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]

ACMG classification

Verdict is Likely_benign. Variant got -6 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.2227535).
• BS2: High AC in GnomAd4 at 19 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
XPO5	NM_020750.3	c.3416A>C	p.Gln1139Pro	missense_variant	Exon 31 of 32	ENST00000265351.12	NP_065801.1
POLR1C	NM_001318876.2	c.922+3484T>G		intron_variant	Intron 8 of 8		NP_001305805.1
POLR1C	NM_001363658.2	c.922+3484T>G		intron_variant	Intron 8 of 9		NP_001350587.1
XPO5	NR_144392.2	n.3728A>C		non_coding_transcript_exon_variant	Exon 32 of 33

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
XPO5	ENST00000265351.12	c.3416A>C	p.Gln1139Pro	missense_variant	Exon 31 of 32	1	NM_020750.3	ENSP00000265351.7

Frequencies

GnomAD3 genomes AF: 0.000125 AC: 19 AN: 152174 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000483

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000221

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000164 AC: 41 AN: 249296 Hom.: 0 AF XY: 0.000185 AC XY: 25 AN XY: 135248

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000869

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000229

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000265

Gnomad OTH exome AF: 0.000165

GnomAD4 exome AF: 0.000213 AC: 311 AN: 1461688 Hom.: 0 Cov.: 33 AF XY: 0.000217 AC XY: 158 AN XY: 727126

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.000112

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000278

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000251

Gnomad4 OTH exome AF: 0.0000497

GnomAD4 genome AF: 0.000125 AC: 19 AN: 152174 Hom.: 0 Cov.: 32 AF XY: 0.000108 AC XY: 8 AN XY: 74350

Gnomad4 AFR AF: 0.0000483

Gnomad4 AMR AF: 0.0000655

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000221

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000655 Hom.: 1

Bravo AF: 0.000106

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000365 AC: 3

ExAC AF: 0.000157 AC: 19

EpiCase AF: 0.000164

EpiControl AF: 0.000237

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Dec 12, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glutamine, which is neutral and polar, with proline, which is neutral and non-polar, at codon 1139 of the XPO5 protein (p.Gln1139Pro). This variant is present in population databases (rs201491980, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with XPO5-related conditions. ClinVar contains an entry for this variant (Variation ID: 2754598). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.065
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.20
CADD	Pathogenic	26
DANN	Uncertain	0.99
DEOGEN2	Benign	0.13	T
Eigen	Uncertain	0.54
Eigen_PC	Uncertain	0.59
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Benign	0.83	T
M_CAP	Benign	0.026	D
MetaRNN	Benign	0.22	T
MetaSVM	Benign	-0.78	T
MutationAssessor	Benign	1.4	L
PrimateAI	Uncertain	0.61	T
PROVEAN	Benign	-1.6	N
REVEL	Benign	0.22
Sift	Benign	0.15	T
Sift4G	Uncertain	0.0070	D
Polyphen		0.97	D
Vest4		0.37
MVP		0.24
MPC		2.0
ClinPred		0.085	T
GERP RS		6.1
Varity_R		0.69
gMVP		0.74

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.10		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

Other links and lift over

dbSNP: rs201491980; hg19: chr6-43492270;