chr13-52144720-G-A

Position:

• chr13-52144720-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_002498.3(NEK3):​c.775C>T​(p.Arg259Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000713 in 1,613,676 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 11/18 in silico tools predict a benign 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. R259G) has been classified as Benign.

• Frequency:
  • Genomes: 𝑓 0.00013 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000065 (0 hom.)
• Consequence: NEK3 NM_002498.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.41

Genes affected

NEK3 (HGNC:7746): (NIMA related kinase 3) This gene encodes a member of the NimA (never in mitosis A) family of serine/threonine protein kinases. The encoded protein differs from other NimA family members in that it is not cell cycle regulated and is found primarily in the cytoplasm. The kinase is activated by prolactin stimulation, leading to phosphorylation of VAV2 guanine nucleotide exchange factor, paxillin, and activation of the RAC1 GTPase. Two functional alleles for this gene have been identified in humans. The reference genome assembly (GRCh38) represents a functional allele that is associated with the inclusion of an additional coding exon in protein-coding transcripts, compared to an alternate functional allele that lacks the exon. [provided by RefSeq, Sep 2019]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2275474).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NEK3	NM_002498.3	c.775C>T	p.Arg259Trp	missense_variant	9/16	ENST00000610828.5
NEK3	NM_152720.3	c.775C>T	p.Arg259Trp	missense_variant	9/16
NEK3	NR_164641.1	n.887C>T		non_coding_transcript_exon_variant	9/15

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NEK3	ENST00000610828.5	c.775C>T	p.Arg259Trp	missense_variant	9/16	1	NM_002498.3	P2
NEK3	ENST00000618534.4	c.775C>T	p.Arg259Trp	missense_variant	9/16	5		P2
NEK3	ENST00000620675.4	c.775C>T	p.Arg259Trp	missense_variant	9/16	5		A2
NEK3	ENST00000617054.1	c.775C>T	p.Arg259Trp	missense_variant, NMD_transcript_variant	8/14	5

Frequencies

GnomAD3 genomes AF: 0.000132 AC: 20 AN: 152028 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000338

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000193

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000735

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000762 AC: 19 AN: 249188 Hom.: 0 AF XY: 0.0000370 AC XY: 5 AN XY: 135190

Gnomad AFR exome AF: 0.000194

Gnomad AMR exome AF: 0.0000290

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000167

Gnomad SAS exome AF: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000974

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000650 AC: 95 AN: 1461648 Hom.: 0 Cov.: 31 AF XY: 0.0000715 AC XY: 52 AN XY: 727102

Gnomad4 AFR exome AF: 0.000299

Gnomad4 AMR exome AF: 0.0000224

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000479

Gnomad4 SAS exome AF: 0.0000464

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000486

Gnomad4 OTH exome AF: 0.0000994

GnomAD4 genome AF: 0.000132 AC: 20 AN: 152028 Hom.: 0 Cov.: 32 AF XY: 0.000135 AC XY: 10 AN XY: 74248

Gnomad4 AFR AF: 0.000338

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000193

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000735

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000225 Hom.: 0

Bravo AF: 0.000121

ExAC AF: 0.0000993 AC: 12

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 07, 2021

The c.775C>T (p.R259W) alteration is located in exon 9 (coding exon 8) of the NEK3 gene. This alteration results from a C to T substitution at nucleotide position 775, causing the arginine (R) at amino acid position 259 to be replaced by a tryptophan (W). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.28	T
BayesDel_noAF	Benign	-0.36
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Benign	0.14	.;.;T;T
Eigen	Benign	-0.15
Eigen_PC	Benign	-0.33
FATHMM_MKL	Benign	0.095	N
LIST_S2	Uncertain	0.88	D;D;D;.
M_CAP	Benign	0.039	D
MetaRNN	Benign	0.23	T;T;T;T
MetaSVM	Benign	-0.91	T
MutationAssessor	Uncertain	2.4	.;M;M;M
MutationTaster	Benign	1.0	N;N;N;N;N
PrimateAI	Benign	0.26	T
Sift4G	Uncertain	0.0070	D;D;D;D
Polyphen		0.98	.;.;D;D
Vest4		0.41
MVP		0.28
ClinPred		0.22	T
GERP RS		2.6
Varity_R		0.056
gMVP		0.52

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs34077016; hg19: chr13-52718855;