5-137617677-G-A

Variant summary

Our verdict is Benign. Variant got -10 ACMG points: 0P and 10B. BP4_Strong BP6_Moderate BS1

The NM_017415.3(KLHL3):c.*4421C>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00183 in 152,280 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.0018 (1 hom., cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: KLHL3 NM_017415.3 3_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -1.45

Genes affected

KLHL3 (HGNC:6354): (kelch like family member 3) This gene is ubiquitously expressed and encodes a full-length protein which has an N-terminal BTB domain followed by a BACK domain and six kelch-like repeats in the C-terminus. These kelch-like repeats promote substrate ubiquitination of bound proteins via interaction of the BTB domain with the CUL3 (cullin 3) component of a cullin-RING E3 ubiquitin ligase (CRL) complex. Muatations in this gene cause pseudohypoaldosteronism type IID (PHA2D); a rare Mendelian syndrome featuring hypertension, hyperkalaemia and metabolic acidosis. Alternative splicing results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Mar 2012]

ACMG classification

Verdict is Benign. Variant got -10 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BP6: Variant 5-137617677-G-A is Benign according to our data. Variant chr5-137617677-G-A is described in ClinVar as [Benign]. Clinvar id is 904612.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00183 (279/152280) while in subpopulation NFE AF= 0.00322 (219/68028). AF 95% confidence interval is 0.00287. There are 1 homozygotes in gnomad4. There are 131 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
KLHL3	NM_017415.3	c.*4421C>T		3_prime_UTR_variant	15/15	ENST00000309755.9
KLHL3	NM_001257194.1	c.*4421C>T		3_prime_UTR_variant	15/15
KLHL3	NM_001257195.2	c.*4421C>T		3_prime_UTR_variant	13/13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
KLHL3	ENST00000309755.9	c.*4421C>T		3_prime_UTR_variant	15/15	1	NM_017415.3	P1
KLHL3	ENST00000506491.5	c.*4421C>T		3_prime_UTR_variant	13/13	1
KLHL3	ENST00000508657.5	c.*4421C>T		3_prime_UTR_variant	15/15	1
KLHL3	ENST00000509694.1	n.810C>T		non_coding_transcript_exon_variant	2/2	5

Frequencies

GnomAD3 genomes AF: 0.00183 AC: 279 AN: 152162 Hom.: 1 Cov.: 33

Gnomad AFR AF: 0.000579

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000524

Gnomad ASJ AF: 0.00202

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00151

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00322

Gnomad OTH AF: 0.00239

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 8 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 2

Gnomad4 AMR exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

GnomAD4 genome AF: 0.00183 AC: 279 AN: 152280 Hom.: 1 Cov.: 33 AF XY: 0.00176 AC XY: 131 AN XY: 74458

Gnomad4 AFR AF: 0.000577

Gnomad4 AMR AF: 0.000523

Gnomad4 ASJ AF: 0.00202

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00151

Gnomad4 NFE AF: 0.00322

Gnomad4 OTH AF: 0.00237

Alfa AF: 0.00254 Hom.: 0

Bravo AF: 0.00179

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Pseudohypoaldosteronism type 2D Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
Cadd	Benign	0.36
Dann	Benign	0.59

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: rs185010344; hg19: chr5-136953366;