chr2-240769685-C-T

Variant names:

• chr2-240769685-C-T
• rs777894370
• NM_001244008.2:c.1363G>A

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_001244008.2(KIF1A):​c.1363G>A​(p.Glu455Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,234 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E455Q) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: KIF1A NM_001244008.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.71
• Publications: 0 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, 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

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.779

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KIF1A	NM_001244008.2	MANE Select	c.1363G>A	p.Glu455Lys	missense	Exon 16 of 49	NP_001230937.1	Q12756-3
	KIF1A	NM_001379631.1		c.1438G>A	p.Glu480Lys	missense	Exon 16 of 49	NP_001366560.1
	KIF1A	NM_001379642.1		c.1336G>A	p.Glu446Lys	missense	Exon 15 of 49	NP_001366571.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KIF1A	ENST00000498729.9	TSL:5 MANE Select	c.1363G>A	p.Glu455Lys	missense	Exon 16 of 49	ENSP00000438388.1	Q12756-3
	KIF1A	ENST00000675932.2		c.1363G>A	p.Glu455Lys	missense	Exon 16 of 49	ENSP00000502786.2	A0A6Q8PHQ5
	KIF1A	ENST00000675314.2		c.1492G>A	p.Glu498Lys	missense	Exon 17 of 50	ENSP00000502584.2	A0A6Q8PH56

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461234 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 726898

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44700

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26124

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86230

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53142

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111740

Other (OTH) AF: 0.00 AC: 0 AN: 60354

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Uncertain	0.090
CADD	Pathogenic	32
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.66	D
Eigen	Uncertain	0.65
Eigen_PC	Uncertain	0.61
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.69	D
MetaRNN	Pathogenic	0.78	D
MetaSVM	Uncertain	0.41	D
MutationAssessor	Uncertain	2.7	M
PhyloP100		7.7
PrimateAI	Pathogenic	0.93	D
PROVEAN	Uncertain	-3.6	D
REVEL	Pathogenic	0.72
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0070	D
Polyphen		0.47	P
Vest4		0.82
MutPred		0.48		Gain of MoRF binding (P = 0.0016)
MVP		0.80
MPC		2.5
ClinPred		0.99	D
GERP RS		4.4
Varity_R		0.91
gMVP		0.99
Mutation Taster		=55/45	polymorphism

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

Other links and lift over

dbSNP: rs777894370; hg19: chr2-241709102;