17-5022672-G-A

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 0P and 3B. BP4_ModerateBS1_Supporting

The NM_006612.6(KIF1C):c.2591G>A(p.Arg864His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000997 in 1,574,914 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000096 ( 0 hom. )

Consequence

KIF1C
NM_006612.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 0.883

Publications

2 publications found

Variant links:

Genes affected

KIF1C (HGNC:6317): (kinesin family member 1C) The protein encoded by this gene is a member of the kinesin-like protein family. The family members are microtubule-dependent molecular motors that transport organelles within cells and move chromosomes during cell division. Mutations in this gene are a cause of spastic ataxia 2, autosomal recessive. [provided by RefSeq, May 2014]

KIF1C links:

KIF1C-AS1 (HGNC:40324): (KIF1C antisense RNA 1)

KIF1C-AS1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.16502282).

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.000131 (20/152250) while in subpopulation NFE AF = 0.000191 (13/68034). AF 95% confidence interval is 0.000112. There are 0 homozygotes in GnomAd4. There are 9 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KIF1C	NM_006612.6 link	c.2591G>A	p.Arg864His	missense_variant	Exon 22 of 23	ENST00000320785.10	NP_006603.2	O43896
KIF1C	XM_005256424.3 link	c.2591G>A	p.Arg864His	missense_variant	Exon 23 of 24		XP_005256481.1	O43896

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KIF1C	ENST00000320785.10 link	c.2591G>A	p.Arg864His	missense_variant	Exon 22 of 23	1	NM_006612.6	ENSP00000320821.5		O43896
KIF1C-AS1	ENST00000438266.2 link	n.172-1717C>T		intron_variant	Intron 1 of 3	2

Frequencies

GnomAD3 genomes

AF:

0.000131

AC:

AN:

152250

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.000191

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000105

AC:

AN:

209524

AF XY:

0.000115

show subpopulations

Gnomad AFR exome

AF:

0.0000671

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000143

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000179

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000963

AC:

137

AN:

1422664

Hom.:

Cov.:

AF XY:

0.0000938

AC XY:

AN XY:

703598

show subpopulations

African (AFR)

AF:

0.0000919

AC:

AN:

32640

American (AMR)

AF:

0.0000739

AC:

AN:

40620

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

23544

East Asian (EAS)

AF:

0.0000255

AC:

AN:

39246

South Asian (SAS)

AF:

0.000100

AC:

AN:

79684

European-Finnish (FIN)

AF:

0.00

AC:

AN:

49870

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5604

European-Non Finnish (NFE)

AF:

0.000107

AC:

117

AN:

1092724

Other (OTH)

AF:

0.0000851

AC:

AN:

58732

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.492

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000131

AC:

AN:

152250

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74380

show subpopulations

African (AFR)

AF:

0.000145

AC:

AN:

41472

American (AMR)

AF:

0.0000654

AC:

AN:

15290

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5200

South Asian (SAS)

AF:

0.00

AC:

AN:

4838

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.000191

AC:

AN:

68034

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.487

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000529

Hom.:

Bravo

AF:

0.000102

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000465

AC:

ExAC

AF:

0.000231

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 13, 2024

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: KIF1C c.2591G>A (p.Arg864His) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The frequency data for this variant in gnomAD is considered unreliable, as metrics indicate poor data quality at this position. c.2591G>A has been reported in the literature in an individuals affected with hereditary spastic paraplegia, without strong evidence for causality (Morais_2017). These report(s) do not provide unequivocal conclusions about association of the variant with Spastic Ataxia 2. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publication have been ascertained in the context of this evaluation (PMID: 28832565). ClinVar contains an entry for this variant (Variation ID: 424676). Based on the evidence outlined above, the variant was classified as uncertain significance. -

Spastic ataxia 2

Uncertain:1

Feb 18, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 864 of the KIF1C protein (p.Arg864His). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This missense change has been observed in individual(s) with hereditary spastic paraplegia, but no second variant was identified (PMID: 28832565). ClinVar contains an entry for this variant (Variation ID: 424676). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). 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. -

Hereditary spastic paraplegia

Uncertain:1

Mar 07, 2017

Unit for Genetic & Epidemiological Research on Neurological Disorders, Instituto de Investigação e Inovação em Saúde

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:research

- -

not provided

Uncertain:1

Jan 01, 2024

CeGaT Center for Human Genetics Tuebingen

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.38

BayesDel_addAF

Benign

-0.031

BayesDel_noAF

Benign

-0.28

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.20

Eigen

Benign

0.15

Eigen_PC

Benign

0.13

FATHMM_MKL

Benign

0.41

LIST_S2

Uncertain

0.95

M_CAP

Benign

0.048

MetaRNN

Benign

0.17

MetaSVM

Uncertain

-0.16

MutationAssessor

Benign

1.6

PhyloP100

0.88

PrimateAI

Uncertain

0.67

PROVEAN

Benign

-1.3

REVEL

Benign

0.23

Sift

Uncertain

0.0020

Sift4G

Uncertain

0.012

Polyphen

1.0

Vest4

0.44

MVP

0.75

MPC

1.1

ClinPred

0.13

GERP RS

4.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.8

Varity_R

0.11

gMVP

0.40

Mutation Taster

=91/9

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over