rs144953748

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001126128.2(PROK2):c.301C>T(p.Arg101Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000967 in 1,614,010 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000096 ( 0 hom. )

Consequence

PROK2
NM_001126128.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 2.68

Variant links:

Genes affected

PROK2 (HGNC:18455): (prokineticin 2) This gene encodes a protein expressed in the suprachiasmatic nucleus (SCN) circadian clock that may function as the output component of the circadian clock. The secreted form of the encoded protein may also serve as a chemoattractant for neuronal precursor cells in the olfactory bulb. Proteins from other vertebrates which are similar to this gene product were isolated based on homology to snake venom and secretions from frog skin, and have been shown to have diverse functions. Mutations in this gene are associated with Kallmann syndrome 4. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

PROK2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PROK2	NM_001126128.2 link	c.301C>T	p.Arg101Trp	missense_variant	Exon 4 of 4	ENST00000295619.4	NP_001119600.1	Q9HC23-1
PROK2	NM_021935.4 link	c.238C>T	p.Arg80Trp	missense_variant	Exon 3 of 3		NP_068754.1	Q9HC23-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PROK2	ENST00000295619.4 link	c.301C>T	p.Arg101Trp	missense_variant	Exon 4 of 4	1	NM_001126128.2	ENSP00000295619.3		Q9HC23-1
PROK2	ENST00000353065.7 link	c.238C>T	p.Arg80Trp	missense_variant	Exon 3 of 3	1		ENSP00000295618.3		Q9HC23-2

Frequencies

GnomAD3 genomes

AF:

0.000105

AC:

AN:

152088

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.000576

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000827

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.000957

GnomAD3 exomes

AF:

0.000127

AC:

AN:

251232

Hom.:

AF XY:

0.000155

AC XY:

AN XY:

135812

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000596

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000588

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000704

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000958

AC:

140

AN:

1461804

Hom.:

Cov.:

AF XY:

0.000110

AC XY:

AN XY:

727208

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.000612

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000545

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000621

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

AF:

0.000105

AC:

AN:

152206

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

74418

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.000576

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000828

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.000947

Alfa

AF:

0.000163

Hom.:

Bravo

AF:

0.0000869

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000132

AC:

EpiCase

AF:

0.000382

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Oct 25, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces arginine, which is basic and polar, with tryptophan, which is neutral and slightly polar, at codon 101 of the PROK2 protein (p.Arg101Trp). This variant is present in population databases (rs144953748, gnomAD 0.06%). This missense change has been observed in individuals with clinical features of PROK2-related conditions and/or Kallman syndrome (PMID: 24031091, 36138264, 36531499). This variant is also known as c.238C>T, p.Arg80Trp. ClinVar contains an entry for this variant (Variation ID: 1303091). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. 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. -

Dec 09, 2019

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; This variant is associated with the following publications: (PMID: 24031091, 25531638) -

PROK2-related disorder

Uncertain:1

Mar 05, 2024

PreventionGenetics, part of Exact Sciences

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

The PROK2 c.301C>T variant is predicted to result in the amino acid substitution p.Arg101Trp. This variant has been reported in individuals with Kallmann syndrome/hypogonadotropic hypogonadism (for example, see Sarfati et al. 2013. PubMed ID: 24031091; Brauner et al. 2021. PubMed ID: 34055685). This variant is reported in 0.059% of alleles in individuals of South Asian descent in gnomAD, which may be too common to be a primary cause of disease. Although we suspect that this variant may be benign, at this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.23

BayesDel_addAF

Benign

-0.14

BayesDel_noAF

Benign

-0.090

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.80

.;D

Eigen

Uncertain

0.41

Eigen_PC

Uncertain

0.38

FATHMM_MKL

Uncertain

0.85

LIST_S2

Uncertain

0.97

D;D

M_CAP

Uncertain

0.18

MetaRNN

Uncertain

0.51

D;D

MetaSVM

Uncertain

0.32

MutationAssessor

Uncertain

2.1

.;M

PrimateAI

Uncertain

0.52

PROVEAN

Pathogenic

-5.0

D;D

REVEL

Pathogenic

0.85

Sift

Uncertain

0.0020

D;D

Sift4G

Pathogenic

0.0010

D;D

Polyphen

1.0

.;D

Vest4

0.51

MVP

0.98

MPC

0.50

ClinPred

0.42

GERP RS

2.6

Varity_R

0.40

gMVP

0.72

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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