chr1-211663444-C-G

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 0P and 1B. BS1_Supporting

The NM_002497.4(NEK2):c.1320G>C(p.Gln440His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000378 in 1,612,748 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. Q440K) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000053 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000036 ( 0 hom. )

Consequence

NEK2
NM_002497.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 0.743

Publications

1 publications found

Variant links:

Genes affected

NEK2 (HGNC:7745): (NIMA related kinase 2) This gene encodes a serine/threonine-protein kinase that is involved in mitotic regulation. This protein is localized to the centrosome, and undetectable during G1 phase, but accumulates progressively throughout the S phase, reaching maximal levels in late G2 phase. Alternatively spliced transcript variants encoding different isoforms with distinct C-termini have been noted for this gene. [provided by RefSeq, Feb 2011]

NEK2 Gene-Disease associations (from GenCC):

retinitis pigmentosa
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
retinitis pigmentosa 67
Inheritance: AR, Unknown Classification: LIMITED Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)

NEK2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -1 ACMG points.

BS1

Variant frequency is greater than expected in population amr. GnomAd4 allele frequency = 0.0000526 (8/152212) while in subpopulation AMR AF = 0.000393 (6/15282). AF 95% confidence interval is 0.00017. There are 0 homozygotes in GnomAd4. There are 5 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NEK2	NM_002497.4 link	c.1320G>C	p.Gln440His	missense_variant	Exon 8 of 8	ENST00000366999.9	NP_002488.1	P51955-1
NEK2	NM_001204182.2 link	c.1111+3662G>C		intron_variant	Intron 7 of 7		NP_001191111.1	P51955F6U4U2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
NEK2	ENST00000366999.9 link	c.1320G>C	p.Gln440His	missense_variant	Exon 8 of 8	1	NM_002497.4	ENSP00000355966.4	P51955-1
NEK2	ENST00000540251.5 link	c.1111+3662G>C		intron_variant	Intron 7 of 7	1		ENSP00000440237.2	F6U4U2
NEK2	ENST00000462283.5 link	n.760G>C		non_coding_transcript_exon_variant	Exon 5 of 5	2
NEK2	ENST00000489633.1 link	n.*81G>C		downstream_gene_variant		2

Frequencies

GnomAD3 genomes

AF:

0.0000526

AC:

AN:

152212

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000393

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000602

AC:

AN:

249140

AF XY:

0.0000594

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000872

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000891

Gnomad OTH exome

AF:

0.000165

GnomAD4 exome

AF:

0.0000363

AC:

AN:

1460536

Hom.:

Cov.:

AF XY:

0.0000358

AC XY:

AN XY:

726420

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33466

American (AMR)

AF:

0.0000672

AC:

AN:

44644

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26098

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.0000349

AC:

AN:

85946

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53340

Middle Eastern (MID)

AF:

0.000694

AC:

AN:

5760

European-Non Finnish (NFE)

AF:

0.0000342

AC:

AN:

1111246

Other (OTH)

AF:

0.0000829

AC:

AN:

60338

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.479

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000526

AC:

AN:

152212

Hom.:

Cov.:

AF XY:

0.0000672

AC XY:

AN XY:

74354

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41452

American (AMR)

AF:

0.000393

AC:

AN:

15282

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5198

South Asian (SAS)

AF:

0.00

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10610

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68044

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.506

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000900

Hom.:

Bravo

AF:

0.0000491

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000330

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 26, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.1320G>C (p.Q440H) alteration is located in exon 8 (coding exon 8) of the NEK2 gene. This alteration results from a G to C substitution at nucleotide position 1320, causing the glutamine (Q) at amino acid position 440 to be replaced by a histidine (H). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Feb 11, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces glutamine, which is neutral and polar, with histidine, which is basic and polar, at codon 440 of the NEK2 protein (p.Gln440His). This variant is present in population databases (rs141984487, gnomAD 0.01%). This variant has not been reported in the literature in individuals affected with NEK2-related conditions. ClinVar contains an entry for this variant (Variation ID: 1436576). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.25

BayesDel_addAF

Benign

-0.021

BayesDel_noAF

Uncertain

-0.070

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.20

Eigen

Uncertain

0.53

Eigen_PC

Uncertain

0.53

FATHMM_MKL

Uncertain

0.97

LIST_S2

Uncertain

0.89

M_CAP

Benign

0.054

MetaRNN

Uncertain

0.54

MetaSVM

Uncertain

0.48

MutationAssessor

Uncertain

2.0

PhyloP100

0.74

PrimateAI

Pathogenic

0.80

PROVEAN

Benign

-1.7

REVEL

Uncertain

0.47

Sift

Uncertain

0.0020

Sift4G

Uncertain

0.024

Polyphen

0.99

Vest4

0.51

MutPred

0.25

Gain of sheet (P = 0.0266);

MVP

0.91

MPC

1.1

ClinPred

0.38

GERP RS

4.5

Varity_R

0.17

gMVP

0.32

Mutation Taster

=64/36

polymorphism

(source)

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

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chr1-211663444-C-G

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over