2-240771036-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 1P and 3B. PP2 BP4_Moderate BP6

The NM_001244008.2(KIF1A):c.1276G>A(p.Val426Met) variant causes a missense change. The variant allele was found at a frequency of 0.0000217 in 1,613,220 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V426A) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.000053 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000018 (0 hom.)
• Consequence: KIF1A NM_001244008.2 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:1
• Conservation: PhyloP100: 5.45

Genes affected

KIF1A (HGNC:888): (kinesin family member 1A) The protein encoded by this gene is a member of the kinesin family and functions as an anterograde motor protein that transports membranous organelles along axonal microtubules. Mutations at this locus have been associated with spastic paraplegia-30 and hereditary sensory neuropathy IIC. Alternatively spliced transcript variants encoding distinct isoforms have been described. [provided by RefSeq, Apr 2012]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PP2: Missense variant where missense usually causes diseases, KIF1A
• BP4: Computational evidence support a benign effect (MetaRNN=0.22329515).
• BP6: Variant 2-240771036-C-T is Benign according to our data. Variant chr2-240771036-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 566657.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=2}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KIF1A	NM_001244008.2	c.1276G>A	p.Val426Met	missense_variant	15/49	ENST00000498729.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KIF1A	ENST00000498729.9	c.1276G>A	p.Val426Met	missense_variant	15/49	5	NM_001244008.2

Frequencies

GnomAD3 genomes AF: 0.0000526 AC: 8 AN: 152134 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000724

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000588

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000161 AC: 4 AN: 248472 Hom.: 0 AF XY: 0.0000222 AC XY: 3 AN XY: 134994

Gnomad AFR exome AF: 0.0000649

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.0000468

Gnomad NFE exome AF: 0.0000178

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000185 AC: 27 AN: 1460968 Hom.: 0 Cov.: 31 AF XY: 0.0000220 AC XY: 16 AN XY: 726810

Gnomad4 AFR exome AF: 0.0000299

Gnomad4 AMR exome AF: 0.0000224

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000348

Gnomad4 FIN exome AF: 0.0000378

Gnomad4 NFE exome AF: 0.0000162

Gnomad4 OTH exome AF: 0.0000331

GnomAD4 genome AF: 0.0000525 AC: 8 AN: 152252 Hom.: 0 Cov.: 33 AF XY: 0.0000403 AC XY: 3 AN XY: 74450

Gnomad4 AFR AF: 0.0000722

Gnomad4 AMR AF: 0.0000654

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000588

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000125 Hom.: 0

Bravo AF: 0.0000491

ExAC AF: 0.0000330 AC: 4

Asia WGS AF: 0.000289 AC: 1 AN: 3478

EpiCase AF: 0.0000545

EpiControl AF: 0.000119

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Aug 08, 2019	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Nov 21, 2019	In silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Neuropathy, hereditary sensory, type 2C;C5235139:Hereditary spastic paraplegia 30;C5393830:Intellectual disability, autosomal dominant 9 Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Nov 19, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.19
BayesDel_addAF	Benign	-0.22	T
BayesDel_noAF	Benign	-0.25
Cadd	Uncertain	24
Dann	Uncertain	1.0
DEOGEN2	Benign	0.19	T;.;.;.;.;.;.;T;.;.;.;.;.;.
Eigen	Uncertain	0.19
Eigen_PC	Benign	0.18
FATHMM_MKL	Uncertain	0.77	D
M_CAP	Uncertain	0.11	D
MetaRNN	Benign	0.22	T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.29	T
MutationAssessor	Benign	2.0	M;.;.;.;.;.;.;M;.;.;.;.;.;.
MutationTaster	Benign	1.0	D;D
PrimateAI	Pathogenic	0.81	D
Polyphen		0.97	D;.;.;.;.;.;.;D;.;.;.;.;P;.
Vest4		0.49, 0.48
MVP		0.52
MPC		2.0
ClinPred		0.59	D
GERP RS		4.1
Varity_R		0.078
gMVP		0.75

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

LitVar

Other links and lift over

dbSNP: rs531522772; hg19: chr2-241710453; COSMIC: COSV57495592; COSMIC: COSV57495592;