1-32157369-G-A

Position:

• chr1-32157369-G-A

Variant summary

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

The NM_012316.5(KPNA6):​c.255G>A​(p.Met85Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: KPNA6 NM_012316.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.88

Genes affected

KPNA6 (HGNC:6399): (karyopherin subunit alpha 6) 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. The protein encoded by this gene is a member of the importin alpha family. [provided by RefSeq, Jul 2008]

KPNA6 (HGNC:):

ACMG classification

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	Protein	UniProt
KPNA6	NM_012316.5	c.255G>A	p.Met85Ile	missense_variant	4/14	ENST00000373625.8	NP_036448.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KPNA6	ENST00000373625.8	c.255G>A	p.Met85Ile	missense_variant	4/14	1	NM_012316.5	ENSP00000362728.3
KPNA6	ENST00000446515.1	c.108G>A	p.Met36Ile	missense_variant	2/9	3		ENSP00000415677.1
KPNA6	ENST00000469790.1	n.353G>A		non_coding_transcript_exon_variant	4/9	2
KPNA6	ENST00000471599.5	n.237G>A		non_coding_transcript_exon_variant	4/14	2		ENSP00000474234.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

Bravo AF: 0.0000113

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 25, 2022

The c.255G>A (p.M85I) alteration is located in exon 4 (coding exon 4) of the KPNA6 gene. This alteration results from a G to A substitution at nucleotide position 255, causing the methionine (M) at amino acid position 85 to be replaced by an isoleucine (I). 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	0.84
BayesDel_addAF	Uncertain	0.063	T
BayesDel_noAF	Benign	-0.15
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Benign	0.34	T;T
Eigen	Benign	0.18
Eigen_PC	Uncertain	0.34
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.94	D;T
M_CAP	Benign	0.0044	T
MetaRNN	Uncertain	0.50	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.5	L;.
PrimateAI	Pathogenic	0.81	D
PROVEAN	Uncertain	-2.8	D;D
REVEL	Benign	0.22
Sift	Benign	0.049	D;T
Sift4G	Benign	0.75	T;T
Polyphen		0.0020	B;.
Vest4		0.75
MVP		0.69
MPC		1.1
ClinPred		0.96	D
GERP RS		4.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.63
gMVP		0.67

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

Other links and lift over

dbSNP: rs1642163253; hg19: chr1-32622970; COSMIC: COSV65360620;