Genetic Variant NM_004795.4:c.4C>T (chr13-33016444-C-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_004795.4(KL):c.4C>T(p.Pro2Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000281 in 959,334 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.0000070 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000032 ( 0 hom. )

Consequence

KL
NM_004795.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 1.02

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 links:

LOC124903151 (HGNC:):

LOC124903151 links:

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ACMG classification

Classification made for transcript

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=0.11635697).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KL	NM_004795.4 link	c.4C>T	p.Pro2Ser	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.4C>T	p.Pro2Ser	missense_variant	Exon 1 of 5	1	NM_004795.4	ENSP00000369442.3		Q9UEF7-1
KL	ENST00000487852.1 link	n.12C>T		non_coding_transcript_exon_variant	Exon 1 of 5	5

Frequencies

GnomAD3 genomes

AF:

0.00000700

AC:

AN:

142924

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000216

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.0000318

AC:

AN:

816410

Hom.:

Cov.:

AF XY:

0.0000370

AC XY:

AN XY:

378266

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000773

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000161

Gnomad4 OTH exome

AF:

0.0000372

GnomAD4 genome

AF:

0.00000700

AC:

AN:

142924

Hom.:

Cov.:

AF XY:

0.0000144

AC XY:

AN XY:

69390

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000216

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Jul 05, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant has not been reported in the literature in individuals affected with KL-related conditions. This sequence change replaces proline, which is neutral and non-polar, with serine, which is neutral and polar, at codon 2 of the KL protein (p.Pro2Ser). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate insufficient coverage at this position in the gnomAD database. ClinVar contains an entry for this variant (Variation ID: 1485727). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The serine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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. -

Tumoral calcinosis, hyperphosphatemic, familial, 3

Uncertain:1

Feb 19, 2022

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.64

CADD

Benign

DANN

Benign

0.96

DEOGEN2

Benign

0.095

Eigen

Benign

-0.87

Eigen_PC

Benign

-0.85

FATHMM_MKL

Benign

0.048

LIST_S2

Benign

0.29

M_CAP

Uncertain

0.15

MetaRNN

Benign

0.12

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.0

PrimateAI

Pathogenic

0.84

PROVEAN

Benign

0.81

REVEL

Benign

0.050

Sift

Pathogenic

0.0

Sift4G

Benign

0.20

Polyphen

0.0

Vest4

0.14

MutPred

0.22

Gain of phosphorylation at P2 (P = 0.0031);

MVP

0.31

MPC

0.95

ClinPred

0.15

GERP RS

-0.29

Varity_R

0.080

gMVP

0.36

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over