1-10374982-G-T

Variant names:

• chr1-10374982-G-T
• rs768058092
• NM_001365951.3:c.5225G>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PP3_Moderate BS2

The NM_001365951.3(KIF1B):​c.5225G>T​(p.Arg1742Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000889 in 1,461,878 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R1742H) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000089 (0 hom.)
• Consequence: KIF1B NM_001365951.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 8.14
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• pheochromocytoma

  Inheritance: AD Classification: MODERATE, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
• Charcot-Marie-Tooth disease type 2A1

  Inheritance: AD Classification: SUPPORTIVE, LIMITED, NO_KNOWN Submitted by: Ambry Genetics, ClinGen, Orphanet, Labcorp Genetics (formerly Invitae)
• hereditary pheochromocytoma-paraganglioma

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• neuroblastoma, susceptibility to, 1

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PP3: MetaRNN computational evidence supports a deleterious effect, 0.843
• BS2: High AC in GnomAdExome4 at 13 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KIF1B	NM_001365951.3	c.5225G>T	p.Arg1742Leu	missense_variant	Exon 47 of 49	ENST00000676179.1	NP_001352880.1
KIF1B	NM_001365952.1	c.5225G>T	p.Arg1742Leu	missense_variant	Exon 47 of 49		NP_001352881.1
KIF1B	NM_015074.3	c.5087G>T	p.Arg1696Leu	missense_variant	Exon 45 of 47		NP_055889.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KIF1B	ENST00000676179.1	c.5225G>T	p.Arg1742Leu	missense_variant	Exon 47 of 49		NM_001365951.3	ENSP00000502065.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000889 AC: 13 AN: 1461878 Hom.: 0 Cov.: 34 AF XY: 0.00000825 AC XY: 6 AN XY: 727240

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

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

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53418

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.0000108 AC: 12 AN: 1112000

Other (OTH) AF: 0.0000166 AC: 1 AN: 60396

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Apr 05, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.R1696L variant (also known as c.5087G>T), located in coding exon 44 of the KIF1B gene, results from a G to T substitution at nucleotide position 5087. The arginine at codon 1696 is replaced by leucine, an amino acid with dissimilar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.90
BayesDel_addAF	Pathogenic	0.25	D
BayesDel_noAF	Uncertain	0.12
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Benign	0.0	.;D;.;.;.
Eigen	Pathogenic	0.77
Eigen_PC	Pathogenic	0.75
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	1.0	D;D;D;D;D
M_CAP	Benign	0.041	D
MetaRNN	Pathogenic	0.84	D;D;D;D;D
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.0	.;M;M;.;.
PhyloP100		8.1
PrimateAI	Pathogenic	0.81	D
PROVEAN	Pathogenic	-5.7	D;D;D;.;.
REVEL	Pathogenic	0.65
Sift	Pathogenic	0.0	D;D;D;.;.
Sift4G	Benign	0.33	T;T;T;T;T
Vest4		0.84
ClinPred		1.0	D
GERP RS		5.5
Varity_R		0.83
gMVP		0.53
Mutation Taster		=29/71	disease causing

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: rs768058092; hg19: chr1-10435040;