rs749718096

Variant names:

• chr2-240775862-C-T
• rs749718096
• NM_001244008.2:c.947G>A
• KIF1A p.Arg316Gln

Your query was ambiguous. Multiple possible variants found:

• chr2-240775862-C-T
• chr2-240775862-C-A

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PM1 PM2 PM5 PP3 PP5

The NM_001244008.2(KIF1A):​c.947G>A​(p.Arg316Gln) variant causes a missense change. 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 Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R316W) has been classified as Likely pathogenic.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: KIF1A NM_001244008.2 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:5 U:2
• Conservation: PhyloP100: 5.98
• Publications: 7 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: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
• hereditary spastic paraplegia 30

  Inheritance: AD, AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• 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_pathogenic. The variant received 8 ACMG points.

• PM1: In a hotspot region, there are 7 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 10 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 chr2-240775863-G-A is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 162060.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.787
• PP5: Variant 2-240775862-C-T is Pathogenic according to our data. Variant chr2-240775862-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 373642.

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.947G>A	p.Arg316Gln	missense	Exon 11 of 49	NP_001230937.1	Q12756-3
	KIF1A	NM_001379631.1		c.947G>A	p.Arg316Gln	missense	Exon 11 of 49	NP_001366560.1
	KIF1A	NM_001379642.1		c.947G>A	p.Arg316Gln	missense	Exon 11 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.947G>A	p.Arg316Gln	missense	Exon 11 of 49	ENSP00000438388.1	Q12756-3
	KIF1A	ENST00000675932.2		c.947G>A	p.Arg316Gln	missense	Exon 11 of 49	ENSP00000502786.2	A0A6Q8PHQ5
	KIF1A	ENST00000675314.2		c.1076G>A	p.Arg359Gln	missense	Exon 12 of 50	ENSP00000502584.2	A0A6Q8PH56

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1456578 Hom.: 0 Cov.: 28 AF XY: 0.00 AC XY: 0 AN XY: 725102

African (AFR) AF: 0.00 AC: 0 AN: 33352

American (AMR) AF: 0.00 AC: 0 AN: 44714

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

East Asian (EAS) AF: 0.00 AC: 0 AN: 39680

South Asian (SAS) AF: 0.00 AC: 0 AN: 86152

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53398

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5756

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1107178

Other (OTH) AF: 0.00 AC: 0 AN: 60224

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
2	1	-	not provided (3)
1	-	-	Charcot-Marie-Tooth disease type 2 (1)
1	-	-	Hereditary spastic paraplegia 30 (1)
1	-	-	Neuropathy, hereditary sensory, type 2C;C5235139:Hereditary spastic paraplegia 30;C5393830:Intellectual disability, autosomal dominant 9 (1)
-	1	-	Spastic paraplegia (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.85
BayesDel_addAF	Uncertain	0.062	T
BayesDel_noAF	Benign	-0.15
CADD	Pathogenic	32
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.72	D
Eigen	Uncertain	0.27
Eigen_PC	Uncertain	0.35
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Uncertain	0.97	D
M_CAP	Pathogenic	0.67	D
MetaRNN	Pathogenic	0.79	D
MetaSVM	Uncertain	-0.14	T
MutationAssessor	Benign	-0.89	N
PhyloP100		6.0
PrimateAI	Uncertain	0.77	T
PROVEAN	Uncertain	-3.4	D
REVEL	Uncertain	0.61
Sift	Uncertain	0.0020	D
Sift4G	Uncertain	0.0060	D
PromoterAI		-0.020	Neutral
Varity_R		0.78
gMVP		0.95
Mutation Taster		=11/89	disease causing (ClinVar)

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs749718096;

hg19: chr2-241715279;

COSMIC: COSV57482702;

COSMIC: COSV57482702;