rs1368090910

Variant names:

• chr17-5000781-A-G
• rs1368090910
• NM_006612.6:c.116A>G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_006612.6(KIF1C):​c.116A>G​(p.Asn39Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000682 in 1,613,860 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000068 (0 hom.)
• Consequence: KIF1C NM_006612.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.45

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.36968914).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KIF1C	NM_006612.6	c.116A>G	p.Asn39Ser	missense_variant	Exon 4 of 23	ENST00000320785.10	NP_006603.2
KIF1C	XM_005256424.3	c.116A>G	p.Asn39Ser	missense_variant	Exon 5 of 24		XP_005256481.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KIF1C	ENST00000320785.10	c.116A>G	p.Asn39Ser	missense_variant	Exon 4 of 23	1	NM_006612.6	ENSP00000320821.5
KIF1C	ENST00000574165.1	c.116A>G	p.Asn39Ser	missense_variant	Exon 5 of 7	5		ENSP00000458697.1

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 152062 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000242

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: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000684 AC: 10 AN: 1461798 Hom.: 0 Cov.: 32 AF XY: 0.00000550 AC XY: 4 AN XY: 727220

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000447

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000630

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 152062 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74278

Gnomad4 AFR AF: 0.0000242

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Bravo AF: 0.0000113

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Spastic ataxia 2 Uncertain:1

Oct 19, 2019

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals with KIF1C-related disease. This variant is not present in population databases (ExAC no frequency). This sequence change replaces asparagine with serine at codon 39 of the KIF1C protein (p.Asn39Ser). The asparagine residue is highly conserved and there is a small physicochemical difference between asparagine and serine. 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Benign	-0.047	T
BayesDel_noAF	Benign	-0.31
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.62	D;.
Eigen	Benign	-0.084
Eigen_PC	Benign	0.043
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D;D
M_CAP	Benign	0.042	D
MetaRNN	Benign	0.37	T;T
MetaSVM	Benign	-0.76	T
MutationAssessor	Benign	0.87	L;.
PrimateAI	Uncertain	0.58	T
PROVEAN	Pathogenic	-4.8	D;.
REVEL	Uncertain	0.29
Sift	Uncertain	0.023	D;.
Sift4G	Benign	0.092	T;T
Polyphen		0.0010	B;.
Vest4		0.83
MutPred		0.41		Gain of phosphorylation at N39 (P = 0.0522);Gain of phosphorylation at N39 (P = 0.0522);
MVP		0.63
MPC		0.27
ClinPred		0.76	D
GERP RS		2.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.27
gMVP		0.61

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: rs1368090910; hg19: chr17-4904076;