NM_006612.6:c.339A>G

Variant names:

• chr17-5001377-A-G
• rs142773987
• NM_006612.6:c.339A>G

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP4_Strong BP6 BP7 BS1

The NM_006612.6(KIF1C):​c.339A>G​(p.Pro113Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000158 in 1,613,948 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 Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.000099 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00016 (0 hom.)
• Consequence: KIF1C NM_006612.6 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:2
• Conservation: PhyloP100: -4.17
• Publications: 0 publications found

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]

KIF1C Gene-Disease associations (from GenCC):

• spastic ataxia 2

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

ACMG classification

Our verdict: Benign. The variant received -10 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.8).
• BP6: Variant 17-5001377-A-G is Benign according to our data. Variant chr17-5001377-A-G is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 536736.
• BP7: Synonymous conserved (PhyloP=-4.17 with no splicing effect.
• BS1: Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.0000986 (15/152180) while in subpopulation NFE AF = 0.000162 (11/68008). AF 95% confidence interval is 0.0000905. There are 0 homozygotes in GnomAd4. There are 8 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006612.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KIF1C	NM_006612.6	MANE Select	c.339A>G	p.Pro113Pro	synonymous	Exon 5 of 23	NP_006603.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KIF1C	ENST00000320785.10	TSL:1 MANE Select	c.339A>G	p.Pro113Pro	synonymous	Exon 5 of 23	ENSP00000320821.5
	KIF1C	ENST00000574165.1	TSL:5	c.339A>G	p.Pro113Pro	synonymous	Exon 6 of 7	ENSP00000458697.1

Frequencies

GnomAD3 genomes AF: 0.0000986 AC: 15 AN: 152180 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000965

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: 0.000162

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000916 AC: 23 AN: 251150 AF XY: 0.0000958

Gnomad AFR exome AF: 0.000123

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000176

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.000164 AC: 240 AN: 1461768 Hom.: 0 Cov.: 33 AF XY: 0.000147 AC XY: 107 AN XY: 727186

African (AFR) AF: 0.0000597 AC: 2 AN: 33480

American (AMR) AF: 0.0000224 AC: 1 AN: 44718

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26130

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

South Asian (SAS) AF: 0.00 AC: 0 AN: 86252

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5752

European-Non Finnish (NFE) AF: 0.000210 AC: 233 AN: 1111938

Other (OTH) AF: 0.0000662 AC: 4 AN: 60382

GnomAD4 genome AF: 0.0000986 AC: 15 AN: 152180 Hom.: 0 Cov.: 32 AF XY: 0.000108 AC XY: 8 AN XY: 74342

African (AFR) AF: 0.0000965 AC: 4 AN: 41438

American (AMR) AF: 0.00 AC: 0 AN: 15282

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5192

South Asian (SAS) AF: 0.00 AC: 0 AN: 4838

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10632

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.000162 AC: 11 AN: 68008

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.000198 Hom.: 0

Bravo AF: 0.000121

EpiCase AF: 0.000109

EpiControl AF: 0.000178

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1 Benign:2

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Hereditary spastic paraplegia Uncertain:1

Jul 01, 2018

Genome Diagnostics Laboratory, The Hospital for Sick Children

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Spastic ataxia 2 Benign:1

Jul 25, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

not provided Benign:1

Jan 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

KIF1C: BP4, BP7

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.80
CADD	Benign	1.5
DANN	Benign	0.57
PhyloP100		-4.2

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: rs142773987; hg19: chr17-4904672;