NM_001365951.3:c.899A>G

Variant names:

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 0P and 7B. BP4_ModerateBP6BS2

The NM_001365951.3(KIF1B):c.899A>G(p.Lys300Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000134 in 1,585,132 control chromosomes in the GnomAD database, including 3 homozygotes. 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 0.00014 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00013 ( 2 hom. )

Consequence

KIF1B
NM_001365951.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1U:4B:3

Conservation

PhyloP100: 8.78

Variant links:

Genes affected

KIF1B (HGNC:16636): (kinesin family member 1B) Predicted to enable microtubule binding activity and plus-end-directed microtubule motor activity. Predicted to be involved in chemical synaptic transmission; dense core granule cytoskeletal transport; and vesicle-mediated transport. Predicted to act upstream of or within mitochondrion transport along microtubule. Predicted to be located in cytoplasmic vesicle membrane and neuron projection. Predicted to be part of kinesin complex. Predicted to be active in several cellular components, including axon; dendrite; and microtubule. Implicated in Charcot-Marie-Tooth disease type 2A1; carcinoma (multiple); multiple sclerosis; neuroblastoma; and pheochromocytoma. Biomarker of hepatocellular carcinoma. [provided by Alliance of Genome Resources, Apr 2022]

KIF1B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -7 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.13660213).

BP6

Variant 1-10275444-A-G is Benign according to our data. Variant chr1-10275444-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 157531.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=3, Uncertain_significance=4}.

BS2

High AC in GnomAd4 at 22 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KIF1B	NM_001365951.3 link	c.899A>G	p.Lys300Arg	missense_variant	Exon 11 of 49	ENST00000676179.1	NP_001352880.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KIF1B	ENST00000676179.1 link	c.899A>G	p.Lys300Arg	missense_variant	Exon 11 of 49		NM_001365951.3	ENSP00000502065.1		O60333-1

Frequencies

GnomAD3 genomes

AF:

0.000145

AC:

AN:

152208

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00186

Gnomad FIN

AF:

0.000377

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000118

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000211

AC:

AN:

250786

Hom.:

AF XY:

0.000273

AC XY:

AN XY:

135628

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000850

Gnomad FIN exome

AF:

0.000700

Gnomad NFE exome

AF:

0.0000881

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000133

AC:

190

AN:

1432806

Hom.:

Cov.:

AF XY:

0.000174

AC XY:

124

AN XY:

714694

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000448

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000829

Gnomad4 FIN exome

AF:

0.000434

Gnomad4 NFE exome

AF:

0.0000829

Gnomad4 OTH exome

AF:

0.0000674

GnomAD4 genome

AF:

0.000144

AC:

AN:

152326

Hom.:

Cov.:

AF XY:

0.000161

AC XY:

AN XY:

74488

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000653

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00186

Gnomad4 FIN

AF:

0.000377

Gnomad4 NFE

AF:

0.000118

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000112

Hom.:

Bravo

AF:

0.0000756

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000214

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3476

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Uncertain:4Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2Benign:1

Oct 30, 2024

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The KIF1B c.881A>G; p.Lys294Arg variant (rs373698346) is reported in the literature in several individuals affected with Charcot-Marie-Tooth disease, although it was not demonstrated to be disease-causing (Hoyer 2014, Volodarsky 2021). This variant is found in the South Asian population with an allele frequency of 0.085% (26/30,588 alleles) in the Genome Aggregation Database (v2.1.1). Computational analyses are uncertain whether this variant is neutral or deleterious (REVEL: 0.464). Due to limited information, the clinical significance of this variant is uncertain at this time. References: Hoyer H et al. Genetic diagnosis of Charcot-Marie-Tooth disease in a population by next-generation sequencing. Biomed Res Int. 2014;2014:210401. PMID: 25025039. Volodarsky M et al. Comprehensive genetic sequence and copy number analysis for Charcot-Marie-Tooth disease in a Canadian cohort of 2517 patients. J Med Genet. 2021 Apr;58(4):284-288. PMID: 32376792. -

Nov 03, 2021

Institute for Clinical Genetics, University Hospital TU Dresden, University Hospital TU Dresden

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 01, 2021

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Charcot-Marie-Tooth disease

Pathogenic:1Uncertain:1

Nov 01, 2013

Dept. of Medical Genetics, Telemark Hospital Trust, Telemark Hospital Trust

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: research

- -

Molecular Genetics Laboratory, London Health Sciences Centre

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Charcot-Marie-Tooth disease type 2

Uncertain:1

Aug 21, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces lysine, which is basic and polar, with arginine, which is basic and polar, at codon 294 of the KIF1B protein (p.Lys294Arg). This variant is present in population databases (rs373698346, gnomAD 0.08%), and has an allele count higher than expected for a pathogenic variant. This missense change has been observed in individual(s) with Charcot-Marie-Tooth (CMT) disease (PMID: 25025039, 32376792; internal data). ClinVar contains an entry for this variant (Variation ID: 157531). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt KIF1B protein function with a negative predictive value of 80%. 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. -

not specified

Benign:1

Sep 02, 2020

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Charcot-Marie-Tooth disease type 2A1;C2749485:Neuroblastoma, susceptibility to, 1

Benign:1

Jun 18, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.18

BayesDel_addAF

Benign

-0.21

BayesDel_noAF

Benign

-0.15

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.59

.;.;D;.;.;.;.

Eigen

Uncertain

0.46

Eigen_PC

Uncertain

0.57

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

0.97

.;D;D;D;D;D;D

M_CAP

Benign

0.025

MetaRNN

Benign

0.14

T;T;T;T;T;T;T

MetaSVM

Uncertain

-0.066

MutationAssessor

Benign

0.89

.;.;L;.;L;.;.

PrimateAI

Pathogenic

0.83

PROVEAN

Uncertain

-2.6

D;N;N;D;N;.;.

REVEL

Uncertain

0.46

Sift

Benign

0.044

D;T;T;D;T;.;.

Sift4G

Benign

0.15

T;T;T;T;T;T;T

Polyphen

0.043

B;D;B;B;.;B;.

Vest4

0.54

MVP

0.83

MPC

1.0

ClinPred

0.11

GERP RS

5.8

Varity_R

0.27

gMVP

0.68

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over