13-49710962-G-C

Position:

• chr13-49710962-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP2

The NM_002267.4(KPNA3):​c.832C>G​(p.Gln278Glu) 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: KPNA3 NM_002267.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 10.0

Genes affected

KPNA3 (HGNC:6396): (karyopherin subunit alpha 3) 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. [provided by RefSeq, Jan 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), KPNA3. . Gene score misZ 3.3927 (greater than the threshold 3.09). Trascript score misZ 3.1846 (greater than threshold 3.09). GenCC has associacion of gene with spastic paraplegia 88, autosomal dominant.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KPNA3	NM_002267.4	c.832C>G	p.Gln278Glu	missense_variant	11/17	ENST00000261667.8	NP_002258.2
KPNA3	XM_017020561.2	c.760C>G	p.Gln254Glu	missense_variant	11/17		XP_016876050.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KPNA3	ENST00000261667.8	c.832C>G	p.Gln278Glu	missense_variant	11/17	1	NM_002267.4	ENSP00000261667.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Mar 23, 2024

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.24
BayesDel_addAF	Uncertain	0.066	T
BayesDel_noAF	Benign	-0.14
CADD	Pathogenic	26
DANN	Uncertain	0.99
DEOGEN2	Benign	0.16	T
Eigen	Uncertain	0.36
Eigen_PC	Uncertain	0.47
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	D
M_CAP	Benign	0.024	T
MetaRNN	Uncertain	0.51	D
MetaSVM	Benign	-0.54	T
MutationAssessor	Benign	1.7	L
PrimateAI	Pathogenic	0.82	D
PROVEAN	Benign	-1.8	N
REVEL	Uncertain	0.40
Sift	Benign	0.30	T
Sift4G	Benign	0.16	T
Polyphen		0.39	B
Vest4		0.63
MutPred		0.61		Gain of catalytic residue at S283 (P = 0);
MVP		0.71
MPC		1.1
ClinPred		0.77	D
GERP RS		5.0
Varity_R		0.40
gMVP		0.78

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr13-50285098;