NM_001244008.2:c.2736_2753delGGAGGAGGAGGAGGAGGA

Variant names:

• chr2-240757423-ATCCTCCTCCTCCTCCTCC-A
• rs10594016
• NM_001244008.2:c.2736_2753delGGAGGAGGAGGAGGAGGA

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 0P and 1B. BP3

The NM_001244008.2(KIF1A):​c.2736_2753delGGAGGAGGAGGAGGAGGA​(p.Glu912_Glu917del) variant causes a disruptive inframe deletion change. The variant allele was found at a frequency of 0.00000135 in 1,482,768 control chromosomes in the GnomAD database, with no homozygous occurrence. It is difficult to determine the true allele frequency of this variant because it is of type DEL_BIG, and the frequency of such variant types in population databases may be underestimated and unreliable. Variant has been reported in ClinVar as Uncertain significance (no stars).

• Frequency:
  • Genomes: 𝑓 0.0000073 (0 hom., cov: 0)
  • Exomes 𝑓: 7.4e-7 (0 hom.)
• Consequence: KIF1A NM_001244008.2 disruptive_inframe_deletion
• Clinical Significance: Uncertain significance no assertion criteria provided U:1
• Conservation: PhyloP100: 6.36
• Publications: 17 publications found

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, Labcorp Genetics (formerly Invitae), G2P
• syndromic intellectual disability

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• neuropathy, hereditary sensory, type 2C

  Inheritance: AR Classification: DEFINITIVE, STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
• hereditary spastic paraplegia 30

  Inheritance: AR, AD Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, 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

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• BP3: Nonframeshift variant in repetitive region in NM_001244008.2

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KIF1A	NM_001244008.2	c.2736_2753delGGAGGAGGAGGAGGAGGA	p.Glu912_Glu917del	disruptive_inframe_deletion	Exon 27 of 49	ENST00000498729.9	NP_001230937.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KIF1A	ENST00000498729.9	c.2736_2753delGGAGGAGGAGGAGGAGGA	p.Glu912_Glu917del	disruptive_inframe_deletion	Exon 27 of 49	5	NM_001244008.2	ENSP00000438388.1

Frequencies

GnomAD3 genomes AF: 0.00000727 AC: 1 AN: 137554 Hom.: 0 Cov.: 0

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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: 0.0000161

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 7.43e-7 AC: 1 AN: 1345214 Hom.: 0 AF XY: 0.00000151 AC XY: 1 AN XY: 663332

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 29382

American (AMR) AF: 0.00 AC: 0 AN: 33864

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 23936

East Asian (EAS) AF: 0.00 AC: 0 AN: 34166

South Asian (SAS) AF: 0.0000133 AC: 1 AN: 75084

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 46352

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5376

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1041218

Other (OTH) AF: 0.00 AC: 0 AN: 55836

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome AF: 0.00000727 AC: 1 AN: 137554 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 66558

African (AFR) AF: 0.00 AC: 0 AN: 38134

American (AMR) AF: 0.00 AC: 0 AN: 13388

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3258

East Asian (EAS) AF: 0.00 AC: 0 AN: 4660

South Asian (SAS) AF: 0.00 AC: 0 AN: 4096

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 8966

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 292

European-Non Finnish (NFE) AF: 0.0000161 AC: 1 AN: 62056

Other (OTH) AF: 0.00 AC: 0 AN: 1888

Alfa AF: 0.00 Hom.: 1564

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: no assertion criteria provided

Submissions by phenotype

KIF1A-related disorder Uncertain:1

Sep 06, 2024

PreventionGenetics, part of Exact Sciences

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

The KIF1A c.2736_2753del18 variant is predicted to result in an in-frame deletion (p.Glu912_Glu917del). To our knowledge, this variant has not been reported in the literature or in a large population database, indicating this variant is rare. Of note, this variant occurs in a low-complexity region where different in-frame insertion-deletion variants are common in the general population. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		6.4
Mutation Taster		=97/103	disease causing (fs/PTC)

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs10594016; hg19: chr2-241696840;