2-61478848-T-C

Variant names:

• chr2-61478848-T-C
• NM_003400.4:c.3188A>G

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP2 PP3

The NM_003400.4(XPO1):​c.3188A>G​(p.His1063Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: XPO1 NM_003400.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.98
• Publications: 0 publications found

Genes affected

XPO1 (HGNC:12825): (exportin 1) This cell-cycle-regulated gene encodes a protein that mediates leucine-rich nuclear export signal (NES)-dependent protein transport. The protein specifically inhibits the nuclear export of Rev and U snRNAs. It is involved in the control of several cellular processes by controlling the localization of cyclin B, MPAK, and MAPKAP kinase 2. This protein also regulates NFAT and AP-1. [provided by RefSeq, Jan 2015]

USP34-DT (HGNC:55262): (USP34 divergent transcript)

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 3 curated pathogenic missense variants (we use a threshold of 10). The gene has 0 curated benign missense variants. Gene score misZ: 6.0107 (above the threshold of 3.09). Trascript score misZ: 7.9387 (above the threshold of 3.09).
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.796

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
XPO1	NM_003400.4	c.3188A>G	p.His1063Arg	missense_variant	Exon 25 of 25	ENST00000401558.7	NP_003391.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
XPO1	ENST00000401558.7	c.3188A>G	p.His1063Arg	missense_variant	Exon 25 of 25	1	NM_003400.4	ENSP00000384863.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Apr 15, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.3188A>G (p.H1063R) alteration is located in exon 25 (coding exon 24) of the XPO1 gene. This alteration results from a A to G substitution at nucleotide position 3188, causing the histidine (H) at amino acid position 1063 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	Pathogenic	0.63
BayesDel_addAF	Pathogenic	0.25	D
BayesDel_noAF	Uncertain	0.12
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.40	T;T;T
Eigen	Pathogenic	0.77
Eigen_PC	Pathogenic	0.75
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Benign	0.84	.;.;T
M_CAP	Benign	0.026	D
MetaRNN	Pathogenic	0.80	D;D;D
MetaSVM	Uncertain	-0.24	T
MutationAssessor	Pathogenic	3.0	M;M;M
PhyloP100		8.0
PrimateAI	Pathogenic	0.85	D
PROVEAN	Pathogenic	-4.5	D;D;D
REVEL	Uncertain	0.51
Sift	Benign	0.15	T;T;T
Sift4G	Benign	0.18	T;T;T
Polyphen		1.0	D;D;D
Vest4		0.71
MutPred		0.34		Gain of solvent accessibility (P = 0.0971);Gain of solvent accessibility (P = 0.0971);Gain of solvent accessibility (P = 0.0971);
MVP		0.56
MPC		2.6
ClinPred		0.93	D
GERP RS		5.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.61
gMVP		0.35
Mutation Taster		=27/73	disease causing

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

Other links and lift over

hg19: chr2-61705983;