Genetic Variant IPO5:c.364+61_364+64delTTTT (chr13-97985663-CTTTT-C) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_002271.6(IPO5):c.364+61_364+64delTTTT variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000636 in 785,930 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0 ( 0 hom., cov: 0)

Exomes 𝑓: 0.0000064 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

IPO5
NM_002271.6 intron

Scores

Not classified

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.485

Publications

0 publications found

Variant links:

Genes affected

IPO5 (HGNC:6402): (importin 5) Nucleocytoplasmic transport, a signal- and energy-dependent process, takes place through nuclear pore complexes embedded in the nuclear envelope. The import of proteins containing a nuclear localization signal (NLS) requires the NLS import receptor, a heterodimer of importin alpha and beta subunits also known as karyopherins. Importin alpha binds the NLS-containing cargo in the cytoplasm and importin beta docks the complex at the cytoplasmic side of the nuclear pore complex. In the presence of nucleoside triphosphates and the small GTP binding protein Ran, the complex moves into the nuclear pore complex and the importin subunits dissociate. Importin alpha enters the nucleoplasm with its passenger protein and importin beta remains at the pore. Interactions between importin beta and the FG repeats of nucleoporins are essential in translocation through the pore complex. The protein encoded by this gene is a member of the importin beta family. [provided by RefSeq, Jul 2008]

IPO5 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IPO5	NM_002271.6 link	c.364+61_364+64delTTTT		intron_variant	Intron 6 of 28	ENST00000651721.2	NP_002262.4	O00410-1Q9BVS9B3KWG6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
IPO5	ENST00000651721.2 link	c.364+51_364+54delTTTT		intron_variant	Intron 6 of 28		NM_002271.6	ENSP00000499125.1		O00410-1

Frequencies

GnomAD3 genomes

AF:

0.00

AC:

AN:

145834

Hom.:

Cov.:

Gnomad AFR

AF:

0.00

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000636

AC:

AN:

785930

Hom.:

AF XY:

0.00000734

AC XY:

AN XY:

408716

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

16948

American (AMR)

AF:

0.00

AC:

AN:

29184

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

18692

East Asian (EAS)

AF:

0.00

AC:

AN:

33578

South Asian (SAS)

AF:

0.00

AC:

AN:

58414

European-Finnish (FIN)

AF:

0.00

AC:

AN:

44566

Middle Eastern (MID)

AF:

0.00

AC:

AN:

3338

European-Non Finnish (NFE)

AF:

0.00000734

AC:

AN:

544870

Other (OTH)

AF:

0.0000275

AC:

AN:

36340

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.235

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

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

145834

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

70708

African (AFR)

AF:

0.00

AC:

AN:

39640

American (AMR)

AF:

0.00

AC:

AN:

14502

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3386

East Asian (EAS)

AF:

0.00

AC:

AN:

4890

South Asian (SAS)

AF:

0.00

AC:

AN:

4582

European-Finnish (FIN)

AF:

0.00

AC:

AN:

9308

Middle Eastern (MID)

AF:

0.00

AC:

AN:

308

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

66334

Other (OTH)

AF:

0.00

AC:

AN:

2012

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

0.48

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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13-97985663-CTTTTT-CT

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over