2-240775890-G-C

Variant summary

Our verdict is Pathogenic. Variant got 13 ACMG points: 13P and 0B. PM1 PM2 PM5 PP2 PP3_Strong PP5_Moderate

The NM_001244008.2(KIF1A):c.919C>G(p.Arg307Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R307Q) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: KIF1A NM_001244008.2 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 0.185

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]

ACMG classification

Verdict is Pathogenic. Variant got 13 ACMG points.

• PM1: In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 2 uncertain in NM_001244008.2
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr2-240775889-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 418275.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP2: Missense variant where missense usually causes diseases, KIF1A
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.989
• PP5: Variant 2-240775890-G-C is Pathogenic according to our data. Variant chr2-240775890-G-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 435636.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KIF1A	NM_001244008.2	c.919C>G	p.Arg307Gly	missense_variant	11/49	ENST00000498729.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KIF1A	ENST00000498729.9	c.919C>G	p.Arg307Gly	missense_variant	11/49	5	NM_001244008.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 33

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Intellectual disability, autosomal dominant 9 Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Genetic Services Laboratory, University of Chicago

Mar 16, 2016

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.40	D
BayesDel_noAF	Pathogenic	0.33
Cadd	Benign	23
Dann	Uncertain	1.0
DEOGEN2	Pathogenic	0.92	D;.;.;.;.;.;.;D;.;.;.;.;.;.
Eigen	Uncertain	0.40
Eigen_PC	Benign	0.21
FATHMM_MKL	Benign	0.69	D
M_CAP	Pathogenic	0.88	D
MetaRNN	Pathogenic	0.99	D;D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Pathogenic	0.96	D
MutationAssessor	Pathogenic	4.3	H;H;.;.;.;.;.;H;.;.;.;.;H;.
MutationTaster	Benign	1.0	D;D
PrimateAI	Pathogenic	0.90	D
Polyphen		1.0	D;.;.;.;.;.;.;D;.;.;.;.;D;.
Vest4		0.98, 0.98
MutPred		0.93		Loss of stability (P = 0.0437);Loss of stability (P = 0.0437);Loss of stability (P = 0.0437);Loss of stability (P = 0.0437);Loss of stability (P = 0.0437);Loss of stability (P = 0.0437);Loss of stability (P = 0.0437);Loss of stability (P = 0.0437);Loss of stability (P = 0.0437);Loss of stability (P = 0.0437);Loss of stability (P = 0.0437);.;Loss of stability (P = 0.0437);Loss of stability (P = 0.0437);
MVP		0.92
MPC		2.7
ClinPred		1.0	D
GERP RS		0.87
Varity_R		0.95
gMVP		1.0

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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

Other links and lift over

dbSNP: rs369692236; hg19: chr2-241715307;