chr2-240770964-C-A

Variant names:

Variant summary

Our verdict is Benign. The variant received -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS1

The NM_001244008.2(KIF1A):c.1341+7G>T variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000533 in 1,609,362 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.00043 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00054 ( 0 hom. )

Consequence

KIF1A
NM_001244008.2 splice_region, intron

Scores

Splicing: ADA: 0.0001294

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:6

Conservation

PhyloP100: 0.0810

Publications

1 publications found

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 Gene-Disease associations (from GenCC):

intellectual disability, autosomal dominant 9
Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)
syndromic intellectual disability
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
neuropathy, hereditary sensory, type 2C
Inheritance: AR Classification: DEFINITIVE, STRONG, LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
hereditary spastic paraplegia 30
Inheritance: AR, AD Classification: STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Orphanet
autosomal dominant non-syndromic intellectual disability
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
PEHO syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
hereditary sensory and autonomic neuropathy type 2
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

KIF1A links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -16 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.56).

BP6

Variant 2-240770964-C-A is Benign according to our data. Variant chr2-240770964-C-A is described in ClinVar as Likely_benign. ClinVar VariationId is 382567.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population amr. GnomAd4 allele frequency = 0.000433 (66/152298) while in subpopulation AMR AF = 0.000719 (11/15298). AF 95% confidence interval is 0.000495. There are 0 homozygotes in GnomAd4. There are 26 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001244008.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
KIF1A	NM_001244008.2	MANE Select	c.1341+7G>T	splice_region intron	N/A	NP_001230937.1	Q12756-3
KIF1A	NM_001379631.1		c.1416+7G>T	splice_region intron	N/A	NP_001366560.1
KIF1A	NM_001379642.1		c.1314+7G>T	splice_region intron	N/A	NP_001366571.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
KIF1A	ENST00000498729.9	TSL:5 MANE Select	c.1341+7G>T	splice_region intron	N/A	ENSP00000438388.1	Q12756-3
KIF1A	ENST00000675932.2		c.1341+7G>T	splice_region intron	N/A	ENSP00000502786.2	A0A6Q8PHQ5
KIF1A	ENST00000675314.2		c.1470+7G>T	splice_region intron	N/A	ENSP00000502584.2	A0A6Q8PH56

Frequencies

GnomAD3 genomes

AF:

0.000434

AC:

AN:

152180

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000169

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000720

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:

0.000647

Gnomad OTH

AF:

0.00191

GnomAD2 exomes

AF:

0.000300

AC:

AN:

247050

AF XY:

0.000305

show subpopulations

Gnomad AFR exome

AF:

0.0000647

Gnomad AMR exome

AF:

0.000145

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000498

Gnomad NFE exome

AF:

0.000578

Gnomad OTH exome

AF:

0.000332

GnomAD4 exome

AF:

0.000544

AC:

792

AN:

1457064

Hom.:

Cov.:

AF XY:

0.000533

AC XY:

386

AN XY:

724850

show subpopulations

African (AFR)

AF:

0.000120

AC:

AN:

33406

American (AMR)

AF:

0.000179

AC:

AN:

44686

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26114

East Asian (EAS)

AF:

0.00

AC:

AN:

39692

South Asian (SAS)

AF:

0.00

AC:

AN:

86164

European-Finnish (FIN)

AF:

0.0000197

AC:

AN:

50848

Middle Eastern (MID)

AF:

0.000230

AC:

AN:

4348

European-Non Finnish (NFE)

AF:

0.000686

AC:

763

AN:

1111620

Other (OTH)

AF:

0.000249

AC:

AN:

60186

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.478

Heterozygous variant carriers

123

164

205

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

120

150

<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:

0.000433

AC:

AN:

152298

Hom.:

Cov.:

AF XY:

0.000349

AC XY:

AN XY:

74462

show subpopulations

African (AFR)

AF:

0.000168

AC:

AN:

41558

American (AMR)

AF:

0.000719

AC:

AN:

15298

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5178

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000647

AC:

AN:

68026

Other (OTH)

AF:

0.00189

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.505

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:

0.000518

Hom.:

Bravo

AF:

0.000548

EpiCase

AF:

0.000600

EpiControl

AF:

0.000830

ClinVar

ClinVar submissions

Significance:Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (4)

Hereditary spastic paraplegia (1)

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

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.56

CADD

Benign

2.0

(source)

DANN

Benign

0.89

PhyloP100

0.081

PromoterAI

0.040

Neutral

(source)

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00013

dbscSNV1_RF

Benign

0.0020

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over