chr17-28728861-G-C

Variant names:

• chr17-28728861-G-C
• rs1367268677
• NM_178170.3:c.47+1G>C

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PVS1

The NM_178170.3(NEK8):​c.47+1G>C variant causes a splice donor, intron change. The variant allele was found at a frequency of 0.00000715 in 1,398,200 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000072 (0 hom.)
• Consequence: NEK8 NM_178170.3 splice_donor, intron
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.09
• Publications: 2 publications found

Genes affected

NEK8 (HGNC:13387): (NIMA related kinase 8) This gene encodes a member of the serine/threionine protein kinase family related to NIMA (never in mitosis, gene A) of Aspergillus nidulans. The encoded protein may play a role in cell cycle progression from G2 to M phase. Mutations in the related mouse gene are associated with a disease phenotype that closely parallels the juvenile autosomal recessive form of polycystic kidney disease in humans. [provided by RefSeq, Jul 2008]

NEK8 Gene-Disease associations (from GenCC):

• renal-hepatic-pancreatic dysplasia 2

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: ClinGen, G2P, Ambry Genetics
• autosomal dominant polycystic kidney disease

  Inheritance: AD Classification: STRONG Submitted by: ClinGen
• nephronophthisis 9

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• polycystic kidney disease 8

  Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
• nephronophthisis 2

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• renal-hepatic-pancreatic dysplasia

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

• PVS1: Splicing +-2 bp (donor or acceptor) variant, LoF is a know mechanism of disease, Cryptic splice site detected, with MaxEntScore 4, offset of -10, new splice context is: gagGTgcct. Cryptic site results in frameshift change. If cryptic site found is not functional and variant results in exon loss, it results in frameshift change.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NEK8	NM_178170.3	c.47+1G>C		splice_donor_variant, intron_variant	Intron 1 of 14	ENST00000268766.11	NP_835464.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NEK8	ENST00000268766.11	c.47+1G>C		splice_donor_variant, intron_variant	Intron 1 of 14	1	NM_178170.3	ENSP00000268766.6

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000715 AC: 10 AN: 1398200 Hom.: 0 Cov.: 30 AF XY: 0.00000435 AC XY: 3 AN XY: 689720

African (AFR) AF: 0.00 AC: 0 AN: 31572

American (AMR) AF: 0.00 AC: 0 AN: 35718

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25166

East Asian (EAS) AF: 0.000252 AC: 9 AN: 35746

South Asian (SAS) AF: 0.00 AC: 0 AN: 79210

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49156

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5696

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1077962

Other (OTH) AF: 0.0000172 AC: 1 AN: 57974

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.38
CADD	Pathogenic	35
DANN	Uncertain	0.99
Eigen	Pathogenic	1.2
Eigen_PC	Pathogenic	1.0
FATHMM_MKL	Pathogenic	0.98	D
PhyloP100		6.1
GERP RS		5.1
PromoterAI		-0.31	Neutral
Mutation Taster		=0/100	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.93
SpliceAI score (max)		0.97		Details are displayed if max score is > 0.2
DS_DG_spliceai		0.56		Position offset: -40
DS_DL_spliceai		0.97		Position offset: -1

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs1367268677; hg19: chr17-27055879;