5-62348147-A-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001098511.3(KIF2A):c.259A>C(p.Lys87Gln) 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 benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: KIF2A NM_001098511.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 8.83

Genes affected

KIF2A (HGNC:6318): (kinesin family member 2A) The protein encoded by this gene is a plus end-directed motor required for normal mitotic progression. The encoded protein is required for normal spindle activity during mitosis and is necessary for normal brain development. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2011]

DIMT1 (HGNC:30217): (DIM1 rRNA methyltransferase and ribosome maturation factor) The protein encoded by this gene is a methyltransferase that is responsible for dimethylation of adjacent adenosines near the 18S rRNA decoding site. The encoded protein is essential for ribosome biogenesis, although its catalytic activity is not involved in the process. The yeast ortholog of this protein functions in the cytoplasm while this protein functions in the nucleus. [provided by RefSeq, Jan 2017]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3299968).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KIF2A	NM_001098511.3	c.259A>C	p.Lys87Gln	missense_variant	3/21	ENST00000407818.8
KIF2A	NM_004520.5	c.259A>C	p.Lys87Gln	missense_variant	3/20
KIF2A	NM_001243953.2	c.259A>C	p.Lys87Gln	missense_variant	3/20
KIF2A	NM_001243952.2	c.178A>C	p.Lys60Gln	missense_variant	4/21

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KIF2A	ENST00000407818.8	c.259A>C	p.Lys87Gln	missense_variant	3/21	1	NM_001098511.3	A1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Sep 11, 2023	This sequence change replaces lysine, which is basic and polar, with glutamine, which is neutral and polar, at codon 87 of the KIF2A protein (p.Lys87Gln). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. ClinVar contains an entry for this variant (Variation ID: 1331608). This variant has not been reported in the literature in individuals affected with KIF2A-related conditions. This variant is not present in population databases (gnomAD no frequency). -
Uncertain significance, criteria provided, single submitter	clinical testing	Greenwood Genetic Center Diagnostic Laboratories, Greenwood Genetic Center	Mar 11, 2021	PP2, PM2 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Uncertain	0.075	D
BayesDel_noAF	Benign	-0.13
Cadd	Uncertain	24
Dann	Uncertain	0.98
DEOGEN2	Benign	0.055	T;.;T;.;.;.
Eigen	Benign	0.062
Eigen_PC	Benign	0.21
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	D;D;D;D;D;D
M_CAP	Benign	0.036	D
MetaRNN	Benign	0.33	T;T;T;T;T;T
MetaSVM	Benign	-0.72	T
MutationAssessor	Uncertain	2.3	M;.;.;M;.;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Uncertain	0.60	T
PROVEAN	Benign	-0.93	N;N;N;N;N;N
REVEL	Benign	0.26
Sift	Benign	0.45	T;T;T;T;D;T
Sift4G	Benign	0.45	T;T;T;T;D;T
Polyphen		0.41	B;.;.;B;.;.
Vest4		0.45
MutPred		0.18		Loss of ubiquitination at K87 (P = 0.0297);.;Loss of ubiquitination at K87 (P = 0.0297);Loss of ubiquitination at K87 (P = 0.0297);.;.;
MVP		0.77
MPC		1.4
ClinPred		0.91	D
GERP RS		5.4
Varity_R		0.22
gMVP		0.44

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: chr5-61643974;