rs1001335971

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_004795.4(KL):c.120G>T(p.Gln40His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000546 in 1,464,992 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 31)

Exomes 𝑓: 0.0000023 ( 0 hom. )

Consequence

KL
NM_004795.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.0940

Publications

0 publications found

Variant links:

Genes affected

KL (HGNC:6344): (klotho) This gene encodes a type-I membrane protein that is related to beta-glucosidases. Reduced production of this protein has been observed in patients with chronic renal failure (CRF), and this may be one of the factors underlying the degenerative processes (e.g., arteriosclerosis, osteoporosis, and skin atrophy) seen in CRF. Also, mutations within this protein have been associated with ageing and bone loss. [provided by RefSeq, Jul 2008]

KL Gene-Disease associations (from GenCC):

tumoral calcinosis, hyperphosphatemic, familial, 1
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
tumoral calcinosis, hyperphosphatemic, familial, 3
Inheritance: AR, Unknown Classification: LIMITED Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Ambry Genetics

KL links:

LOC124903151 (HGNC:):

LOC124903151 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.11074442).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KL	NM_004795.4 link	c.120G>T	p.Gln40His	missense_variant	Exon 1 of 5	ENST00000380099.4	NP_004786.2	Q9UEF7-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KL	ENST00000380099.4 link	c.120G>T	p.Gln40His	missense_variant	Exon 1 of 5	1	NM_004795.4	ENSP00000369442.3		Q9UEF7-1
KL	ENST00000487852.1 link	n.128G>T		non_coding_transcript_exon_variant	Exon 1 of 5	5

Frequencies

GnomAD3 genomes

AF:

0.0000330

AC:

AN:

151336

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000228

AC:

AN:

1313656

Hom.:

Cov.:

AF XY:

0.00000312

AC XY:

AN XY:

641912

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.0000372

AC:

AN:

26904

American (AMR)

AF:

0.00

AC:

AN:

24284

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

20402

East Asian (EAS)

AF:

0.00

AC:

AN:

32418

South Asian (SAS)

AF:

0.00

AC:

AN:

67036

European-Finnish (FIN)

AF:

0.0000508

AC:

AN:

39376

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4358

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1044518

Other (OTH)

AF:

0.00

AC:

AN:

54360

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.018321), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.342

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000330

AC:

AN:

151336

Hom.:

Cov.:

AF XY:

0.0000271

AC XY:

AN XY:

73866

show subpopulations

African (AFR)

AF:

0.000121

AC:

AN:

41314

American (AMR)

AF:

0.00

AC:

AN:

15240

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5112

South Asian (SAS)

AF:

0.00

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10328

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67734

Other (OTH)

AF:

0.00

AC:

AN:

2084

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.485

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000416

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Oct 29, 2023

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 40 of the KL protein (p.Gln40His). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with KL-related conditions. ClinVar contains an entry for this variant (Variation ID: 2185023). 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 KL protein function with a negative predictive value of 80%. 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

0.18

BayesDel_addAF

Benign

-0.26

BayesDel_noAF

Benign

-0.61

CADD

Benign

(source)

DANN

Benign

0.93

DEOGEN2

Benign

0.089

Eigen

Benign

-0.64

Eigen_PC

Benign

-0.52

FATHMM_MKL

Benign

0.34

LIST_S2

Benign

0.58

M_CAP

Uncertain

0.10

MetaRNN

Benign

0.11

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.0

PhyloP100

-0.094

PrimateAI

Pathogenic

0.89

PROVEAN

Benign

-0.13

REVEL

Benign

0.052

Sift

Benign

0.13

Sift4G

Benign

0.20

Polyphen

0.0050

Vest4

0.23

MutPred

0.38

Gain of catalytic residue at G36 (P = 0.0061);

MVP

0.46

MPC

0.90

ClinPred

0.073

GERP RS

3.4

PromoterAI

-0.17

Neutral

(source)

Varity_R

0.12

gMVP

0.49

Mutation Taster

=77/23

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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rs1001335971

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over