rs201825284

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 1P and 3B. PP2BP4_ModerateBS1_Supporting

The NM_001244008.2(KIF1A):c.4781C>T(p.Ser1594Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000176 in 1,610,976 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. S1594S) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00047 ( 1 hom., cov: 33)

Exomes 𝑓: 0.00015 ( 1 hom. )

Consequence

KIF1A
NM_001244008.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:1

Conservation

PhyloP100: 7.45

Variant links:

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]

KIF1A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.07873595).

BS1

Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.000473 (72/152330) while in subpopulation AMR AF= 0.00294 (45/15310). AF 95% confidence interval is 0.00226. There are 1 homozygotes in gnomad4. There are 43 alleles in male gnomad4 subpopulation. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KIF1A	NM_001244008.2 linkuse as main transcript	c.4781C>T	p.Ser1594Leu	missense_variant	45/49	ENST00000498729.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KIF1A	ENST00000498729.9 linkuse as main transcript	c.4781C>T	p.Ser1594Leu	missense_variant	45/49	5	NM_001244008.2		Q12756-3

Frequencies

GnomAD3 genomes

AF:

0.000466

AC:

AN:

152212

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000338

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00294

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000384

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000132

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000255

AC:

AN:

242990

Hom.:

AF XY:

0.000241

AC XY:

AN XY:

132516

show subpopulations

Gnomad AFR exome

AF:

0.000336

Gnomad AMR exome

AF:

0.000674

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000338

Gnomad SAS exome

AF:

0.000435

Gnomad FIN exome

AF:

0.000146

Gnomad NFE exome

AF:

0.0000910

Gnomad OTH exome

AF:

0.000339

GnomAD4 exome

AF:

0.000145

AC:

212

AN:

1458646

Hom.:

Cov.:

AF XY:

0.000138

AC XY:

100

AN XY:

725396

show subpopulations

Gnomad4 AFR exome

AF:

0.000448

Gnomad4 AMR exome

AF:

0.000539

Gnomad4 ASJ exome

AF:

0.0000767

Gnomad4 EAS exome

AF:

0.000252

Gnomad4 SAS exome

AF:

0.000268

Gnomad4 FIN exome

AF:

0.000134

Gnomad4 NFE exome

AF:

0.000112

Gnomad4 OTH exome

AF:

0.0000830

GnomAD4 genome

AF:

0.000473

AC:

AN:

152330

Hom.:

Cov.:

AF XY:

0.000577

AC XY:

AN XY:

74490

show subpopulations

Gnomad4 AFR

AF:

0.000337

Gnomad4 AMR

AF:

0.00294

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000578

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000132

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000180

Hom.:

Bravo

AF:

0.000404

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.000504

AC:

ESP6500EA

AF:

0.000120

AC:

ExAC

AF:

0.000258

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genetic Services Laboratory, University of Chicago

Jul 29, 2015

- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 13, 2021

The c.4478C>T (p.S1493L) alteration is located in exon 43 (coding exon 42) of the KIF1A gene. This alteration results from a C to T substitution at nucleotide position 4478, causing the serine (S) at amino acid position 1493 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Hereditary spastic paraplegia

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genome Diagnostics Laboratory, The Hospital for Sick Children

Mar 01, 2020

- -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Dec 12, 2022

Reported in a patient in the published literature with caudal regression syndrome who had another KIF1A variant on the opposite allele (in trans); however, the patient also had variants in two other genes that may have been responsible for the phenotype (Porsch et al., 2016); Identified heterozygous in a patient with congenital spastic paraplegia, intellectual disability, epilepsy, microcephaly, and brain abnormalities in published literature; however, familial segregation information was not available (Nicita et al., 2020); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Also known as p.(S1594L); This variant is associated with the following publications: (PMID: 28007035, 32737135) -

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

Jan 22, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.097

BayesDel_addAF

Benign

-0.20

BayesDel_noAF

Benign

-0.16

Cadd

Pathogenic

Dann

Uncertain

1.0

DEOGEN2

Uncertain

0.51

D;.;.;.;.;.;.;D;.;.;.;.;.;.

Eigen

Benign

0.18

Eigen_PC

Uncertain

0.22

FATHMM_MKL

Uncertain

0.92

M_CAP

Uncertain

0.14

MetaRNN

Benign

0.079

T;T;T;T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.32

MutationAssessor

Uncertain

2.3

M;.;.;.;.;.;.;M;.;.;.;.;.;.

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.67

Polyphen

0.17

B;.;.;.;.;.;.;B;.;.;.;.;.;.

Vest4

0.49

MVP

0.60

MPC

0.74

ClinPred

0.13

GERP RS

4.0

Varity_R

0.12

gMVP

0.38

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over