chr5-137628305-C-T

Position:

• chr5-137628305-C-T

Variant summary

Our verdict is Pathogenic. Variant got 13 ACMG points: 13P and 0B. PM2 PP2 PP3_Moderate PP5_Very_Strong

The NM_017415.3(KLHL3):​c.1583G>A​(p.Arg528His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: KLHL3 NM_017415.3 missense
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:4
• Conservation: PhyloP100: 7.91

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 Pathogenic. Variant got 13 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), KLHL3. . Gene score misZ 2.9931 (greater than the threshold 3.09). Trascript score misZ 3.5661 (greater than threshold 3.09). GenCC has associacion of gene with pseudohypoaldosteronism type 2D.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.895
• PP5: Variant 5-137628305-C-T is Pathogenic according to our data. Variant chr5-137628305-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 30518.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KLHL3	NM_017415.3	c.1583G>A	p.Arg528His	missense_variant	13/15	ENST00000309755.9	NP_059111.2
KLHL3	NM_001257194.1	c.1487G>A	p.Arg496His	missense_variant	13/15		NP_001244123.1
KLHL3	NM_001257195.2	c.1337G>A	p.Arg446His	missense_variant	11/13		NP_001244124.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KLHL3	ENST00000309755.9	c.1583G>A	p.Arg528His	missense_variant	13/15	1	NM_017415.3	ENSP00000312397	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Pseudohypoaldosteronism type 2D Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Aug 23, 2021	- -
Pathogenic, no assertion criteria provided	literature only	OMIM	Oct 01, 2014	- -

not provided Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 23, 2022

ClinVar contains an entry for this variant (Variation ID: 30518). This missense change has been observed in individuals with autosomal dominant pseudohypoaldosteronism type 2 (PMID: 22266938, 25925082). It has also been observed to segregate with disease in related individuals. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 528 of the KLHL3 protein (p.Arg528His). For these reasons, this variant has been classified as Pathogenic. This variant disrupts the p.Arg528 amino acid residue in KLHL3. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 22266938). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt KLHL3 protein function. -

Pseudohypoaldosteronism type 2A Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

Richard Lifton Laboratory, Yale University School of Medicine

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.37	D
BayesDel_noAF	Pathogenic	0.30
CADD	Pathogenic	33
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.59	.;.;D
Eigen	Uncertain	0.65
Eigen_PC	Pathogenic	0.69
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D;D;D
M_CAP	Benign	0.071	D
MetaRNN	Pathogenic	0.89	D;D;D
MetaSVM	Benign	-0.28	T
MutationAssessor	Benign	1.0	.;.;L
MutationTaster	Benign	1.0	A;A;A;A
PrimateAI	Pathogenic	0.90	D
PROVEAN	Pathogenic	-4.7	D;D;D
REVEL	Pathogenic	0.74
Sift	Benign	0.042	D;D;D
Sift4G	Uncertain	0.042	D;D;D
Polyphen		1.0	.;.;D
Vest4		0.90
MutPred		0.71		.;.;Loss of MoRF binding (P = 0.061);
MVP		0.82
MPC		1.8
ClinPred		1.0	D
GERP RS		5.5
Varity_R		0.73
gMVP		0.67

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: rs199469636; hg19: chr5-136963994;