rs1064796738

Variant names:

• chr10-92606655-C-T
• rs1064796738
• NM_004523.4:c.247C>T

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_004523.4(KIF11):​c.247C>T​(p.Arg83*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. 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 Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: KIF11 NM_004523.4 stop_gained
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:4
• Conservation: PhyloP100: 1.15

Genes affected

KIF11 (HGNC:6388): (kinesin family member 11) This gene encodes a motor protein that belongs to the kinesin-like protein family. Members of this protein family are known to be involved in various kinds of spindle dynamics. The function of this gene product includes chromosome positioning, centrosome separation and establishing a bipolar spindle during cell mitosis. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Pathogenic. Variant got 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 10-92606655-C-T is Pathogenic according to our data. Variant chr10-92606655-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 424002.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr10-92606655-C-T is described in Lovd as [Pathogenic]. Variant chr10-92606655-C-T is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KIF11	NM_004523.4	c.247C>T	p.Arg83*	stop_gained	Exon 3 of 22	ENST00000260731.5	NP_004514.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KIF11	ENST00000260731.5	c.247C>T	p.Arg83*	stop_gained	Exon 3 of 22	1	NM_004523.4	ENSP00000260731.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 26

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Microcephaly with or without chorioretinopathy, lymphedema, or intellectual disability Pathogenic:2

Jun 27, 2017

Geisinger Autism and Developmental Medicine Institute, Geisinger Health System

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing;provider interpretation

This 8 year old female with microcephaly (<2nd percentile) and intellectual disbality was found to carry a maternally inherited missense variant in the KIF11 gene. The patient's mother is borderline microcephalic and has a learning disability. Both the patient and her mother are noted to have sloping foreheads with bitemporal narrowing. The patient's unaffected siblings were tested for the KIF11 variant, and they do not harbor this variant. The p.Arg83Ter variant is absent from population databases. The variant is predicted to cause loss of normal protein function either through protein truncation or nonsense-mediated mRNA decay. Additionally, exome sequencing identified biallelic variants in the ASPM gene. -

Oct 31, 2018

Fulgent Genetics, Fulgent Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided Pathogenic:2

Apr 25, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change creates a premature translational stop signal (p.Arg83*) in the KIF11 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in KIF11 are known to be pathogenic (PMID: 22284827, 24281367). This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individual(s) with clinical features of microcephaly with vitreoretinopathy (PMID: 31077665). In at least one individual the variant was observed to be de novo. ClinVar contains an entry for this variant (Variation ID: 424002). For these reasons, this variant has been classified as Pathogenic. -

Oct 31, 2024

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Nonsense variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss of function is a known mechanism of disease; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 38219857, 31077665) -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.59
CADD	Pathogenic	39
DANN	Uncertain	1.0
Eigen	Pathogenic	0.73
Eigen_PC	Uncertain	0.59
FATHMM_MKL	Uncertain	0.92	D
Vest4		0.92
GERP RS		4.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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

Other links and lift over

dbSNP: rs1064796738; hg19: chr10-94366412;