rs758677637

Variant names:

• chr4-169537856-G-A
• rs758677637
• NM_001199397.3:c.1618C>T

Variant summary

Our verdict is Likely pathogenic. The variant received 9 ACMG points: 9P and 0B. PVS1 PP5

The NM_001199397.3(NEK1):​c.1618C>T​(p.Arg540*) variant causes a stop gained change. The variant allele was found at a frequency of 0.00000754 in 1,459,168 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 Likely pathogenic (no stars). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000075 (0 hom.)
• Consequence: NEK1 NM_001199397.3 stop_gained
• Clinical Significance: Pathogenic/Likely pathogenic no assertion criteria provided P:3
• Conservation: PhyloP100: 3.79
• Publications: 1 publications found

Genes affected

NEK1 (HGNC:7744): (NIMA related kinase 1) The protein encoded by this gene is a serine/threonine kinase involved in cell cycle regulation. The encoded protein is found in a centrosomal complex with FEZ1, a neuronal protein that plays a role in axonal development. Defects in this gene are a cause of polycystic kidney disease (PKD). Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2010]

NEK1 Gene-Disease associations (from GenCC):

• amyotrophic lateral sclerosis, susceptibility to, 24

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, ClinGen
• short-rib thoracic dysplasia 6 with or without polydactyly

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• orofaciodigital syndrome type II

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• short rib-polydactyly syndrome, Majewski type

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_pathogenic. The variant received 9 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PP5: Variant 4-169537856-G-A is Pathogenic according to our data. Variant chr4-169537856-G-A is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 446667.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NEK1	NM_001199397.3	c.1618C>T	p.Arg540*	stop_gained	Exon 19 of 36	ENST00000507142.6	NP_001186326.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NEK1	ENST00000507142.6	c.1618C>T	p.Arg540*	stop_gained	Exon 19 of 36	1	NM_001199397.3	ENSP00000424757.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000807 AC: 2 AN: 247770 AF XY: 0.0000149

Gnomad AFR exome AF: 0.0000649

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000559

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000754 AC: 11 AN: 1459168 Hom.: 0 Cov.: 30 AF XY: 0.00000551 AC XY: 4 AN XY: 725860

African (AFR) AF: 0.0000599 AC: 2 AN: 33400

American (AMR) AF: 0.00 AC: 0 AN: 44526

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26074

East Asian (EAS) AF: 0.00 AC: 0 AN: 39570

South Asian (SAS) AF: 0.00 AC: 0 AN: 85848

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53306

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5760

European-Non Finnish (NFE) AF: 0.00000810 AC: 9 AN: 1110434

Other (OTH) AF: 0.00 AC: 0 AN: 60250

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000828 AC: 1

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:3

Revision: no assertion criteria provided

Submissions by phenotype

Short-rib thoracic dysplasia 6 with or without polydactyly Pathogenic:2

-

University of Washington Center for Mendelian Genomics, University of Washington

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: research

- -

Jun 01, 2017

Dan Cohn Lab, University Of California Los Angeles

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: research

- -

NEK1-related disorder Pathogenic:1

May 11, 2024

PreventionGenetics, part of Exact Sciences

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

The NEK1 c.1618C>T variant is predicted to result in premature protein termination (p.Arg540*). This variant was reported along with a second premature termination variant in a patient with short-rib thoracic dysplasia type II (Table S2, Zhang et al. 2017. PubMed ID: 29068549). This variant is reported in 0.0065% of alleles in individuals of African descent in gnomAD, including 11 heterozygous individuals in the gnomAD v4.1.0 dataset (https://gnomad.broadinstitute.org/variant/4-169537856-G-A?dataset=gnomad_r4). Nonsense variants in NEK1 are expected to be pathogenic. This variant is interpreted as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.50	D
BayesDel_noAF	Pathogenic	0.63
CADD	Pathogenic	39
DANN	Uncertain	1.0
Eigen	Pathogenic	0.76
Eigen_PC	Uncertain	0.64
FATHMM_MKL	Uncertain	0.91	D
PhyloP100		3.8
Vest4		0.96
GERP RS		5.0
Mutation Taster		=0/200	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.11		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: rs758677637; hg19: chr4-170459007; COSMIC: COSV101455906;