Variant 3-122449719-C-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_002264.4(KPNA1):c.772G>T(p.Val258Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,458,902 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

KPNA1
NM_002264.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.57

Variant links:

Genes affected

KPNA1 (HGNC:6394): (karyopherin subunit alpha 1) The transport of molecules between the nucleus and the cytoplasm in eukaryotic cells is mediated by the nuclear pore complex (NPC), which consists of 60-100 proteins. Small molecules (up to 70 kD) can pass through the nuclear pore by nonselective diffusion while larger molecules are transported by an active process. The protein encoded by this gene belongs to the importin alpha family, and is involved in nuclear protein import. This protein interacts with the recombination activating gene 1 (RAG1) protein and is a putative substrate of the RAG1 ubiquitin ligase. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2012]

KPNA1 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
KPNA1	NM_002264.4 linkuse as main transcript	c.772G>T	p.Val258Leu	missense_variant	9/14	ENST00000344337.11
KPNA1	XM_005247437.5 linkuse as main transcript	c.772G>T	p.Val258Leu	missense_variant	9/14
KPNA1	XM_024453514.2 linkuse as main transcript	c.772G>T	p.Val258Leu	missense_variant	9/14
KPNA1	NR_026698.2 linkuse as main transcript	n.1083G>T		non_coding_transcript_exon_variant	10/15

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KPNA1	ENST00000344337.11 linkuse as main transcript	c.772G>T	p.Val258Leu	missense_variant	9/14	1	NM_002264.4	P1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1458902

Hom.:

Cov.:

AF XY:

0.00000276

AC XY:

AN XY:

725758

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:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000360

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

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 11, 2023

The c.772G>T (p.V258L) alteration is located in exon 9 (coding exon 8) of the KPNA1 gene. This alteration results from a G to T substitution at nucleotide position 772, causing the valine (V) at amino acid position 258 to be replaced by a leucine (L). 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

0.32

BayesDel_addAF

Uncertain

0.13

BayesDel_noAF

Uncertain

-0.040

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.12

T;.

Eigen

Uncertain

0.20

Eigen_PC

Uncertain

0.36

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.97

D;D

M_CAP

Benign

0.030

MetaRNN

Uncertain

0.54

D;D

MetaSVM

Benign

-0.67

MutationAssessor

Benign

1.8

L;.

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.74

PROVEAN

Benign

-1.7

N;N

REVEL

Benign

0.27

Sift

Benign

0.14

T;T

Sift4G

Benign

0.16

T;.

Polyphen

0.046

B;.

Vest4

0.65

MutPred

0.55

Gain of helix (P = 0.2059);Gain of helix (P = 0.2059);

MVP

0.87

MPC

1.2

ClinPred

0.88

GERP RS

5.4

Varity_R

0.46

gMVP

0.78

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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