5-132716917-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM2 PP2 PP3_Moderate

The NM_001300791.2(KIF3A):c.684A>G(p.Ile228Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: KIF3A NM_001300791.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.0280

Genes affected

KIF3A (HGNC:6319): (kinesin family member 3A) Enables protein phosphatase binding activity; small GTPase binding activity; and spectrin binding activity. Involved in protein localization to cell junction and protein transport. Located in centriole and centrosome. Part of kinesin II complex. Colocalizes with spindle microtubule. [provided by Alliance of Genome Resources, Apr 2022]

(HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, KIF3A
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.922

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KIF3A	NM_001300791.2	c.684A>G	p.Ile228Met	missense_variant	6/19	ENST00000403231.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KIF3A	ENST00000403231.6	c.684A>G	p.Ile228Met	missense_variant	6/19	2	NM_001300791.2
	ENST00000628061.1	n.112-6144T>C		intron_variant, non_coding_transcript_variant		5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

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

Apr 11, 2023

The c.684A>G (p.I228M) alteration is located in exon 6 (coding exon 6) of the KIF3A gene. This alteration results from a A to G substitution at nucleotide position 684, causing the isoleucine (I) at amino acid position 228 to be replaced by a methionine (M). 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	Uncertain	0.38
BayesDel_addAF	Pathogenic	0.20	D
BayesDel_noAF	Uncertain	0.050
Cadd	Benign	22
Dann	Uncertain	1.0
DEOGEN2	Pathogenic	0.80	D;D;T;.
Eigen	Uncertain	0.29
Eigen_PC	Benign	0.20
FATHMM_MKL	Uncertain	0.80	D
LIST_S2	Uncertain	0.95	D;D;D;D
M_CAP	Uncertain	0.20	D
MetaRNN	Pathogenic	0.92	D;D;D;D
MetaSVM	Uncertain	-0.086	T
MutationAssessor	Uncertain	2.5	M;.;.;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.65	T
PROVEAN	Benign	-2.3	N;N;.;N
REVEL	Uncertain	0.61
Sift	Uncertain	0.0020	D;D;.;D
Sift4G	Uncertain	0.0030	D;D;D;D
Polyphen		0.93	P;.;.;D
Vest4		0.79
MutPred		0.81		Gain of disorder (P = 0.0493);Gain of disorder (P = 0.0493);Gain of disorder (P = 0.0493);Gain of disorder (P = 0.0493);
MVP		0.86
MPC		1.7
ClinPred		0.98	D
GERP RS		0.53
Varity_R		0.71
gMVP		0.76

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: chr5-132052609; COSMIC: COSV66414566;