2-96761090-T-C

Variant summary

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

The NM_020184.4(CNNM4):c.91T>C(p.Trp31Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000224 in 1,515,550 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00016 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00023 ( 0 hom. )

Consequence

CNNM4
NM_020184.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 0.805

Variant links:

Genes affected

CNNM4 (HGNC:105): (cyclin and CBS domain divalent metal cation transport mediator 4) This gene encodes a member of the ancient conserved domain containing protein family. Members of this protein family contain a cyclin box motif and have structural similarity to the cyclins. The encoded protein may play a role in metal ion transport. Mutations in this gene are associated with Jalili syndrome which consists of cone-rod dystrophy and amelogenesis imperfecta. [provided by RefSeq, Feb 2010]

CNNM4 links:

Genome browser will be placed here

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=0.13569617).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CNNM4	NM_020184.4 linkuse as main transcript	c.91T>C	p.Trp31Arg	missense_variant	1/7	ENST00000377075.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CNNM4	ENST00000377075.3 linkuse as main transcript	c.91T>C	p.Trp31Arg	missense_variant	1/7	1	NM_020184.4	P1	Q6P4Q7-1

Frequencies

GnomAD3 genomes

AF:

0.000159

AC:

AN:

150760

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000730

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:

0.000311

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000147

AC:

AN:

177062

Hom.:

AF XY:

0.000125

AC XY:

AN XY:

95794

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000619

Gnomad NFE exome

AF:

0.000310

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000231

AC:

315

AN:

1364790

Hom.:

Cov.:

AF XY:

0.000229

AC XY:

153

AN XY:

668562

show subpopulations

Gnomad4 AFR exome

AF:

0.0000322

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000277

Gnomad4 FIN exome

AF:

0.0000415

Gnomad4 NFE exome

AF:

0.000285

Gnomad4 OTH exome

AF:

0.000143

GnomAD4 genome

AF:

0.000159

AC:

AN:

150760

Hom.:

Cov.:

AF XY:

0.000122

AC XY:

AN XY:

73608

show subpopulations

Gnomad4 AFR

AF:

0.0000730

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000311

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000182

Hom.:

Bravo

AF:

0.000136

ExAC

AF:

0.000217

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Oct 17, 2022	This sequence change replaces tryptophan, which is neutral and slightly polar, with arginine, which is basic and polar, at codon 31 of the CNNM4 protein (p.Trp31Arg). This variant is present in population databases (rs760633483, gnomAD 0.03%). This variant has not been reported in the literature in individuals affected with CNNM4-related conditions. ClinVar contains an entry for this variant (Variation ID: 288785). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. 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. -
Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jul 12, 2016	- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 11, 2021

The c.91T>C (p.W31R) alteration is located in exon 1 (coding exon 1) of the CNNM4 gene. This alteration results from a T to C substitution at nucleotide position 91, causing the tryptophan (W) at amino acid position 31 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Jalili syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.52

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Benign

-0.16

Cadd

Benign

Dann

Benign

0.87

DEOGEN2

Benign

0.077

Eigen

Benign

-0.41

Eigen_PC

Benign

-0.36

FATHMM_MKL

Benign

0.10

LIST_S2

Benign

0.23

M_CAP

Benign

0.046

MetaRNN

Benign

0.14

MetaSVM

Benign

-0.87

MutationAssessor

Benign

1.7

MutationTaster

Benign

1.0

PrimateAI

Pathogenic

0.87

PROVEAN

Benign

-2.2

REVEL

Benign

0.24

Sift

Benign

0.070

Sift4G

Benign

0.16

Polyphen

0.0

Vest4

0.51

MutPred

0.62

Gain of disorder (P = 0.0014);

MVP

0.74

MPC

1.7

ClinPred

0.10

GERP RS

3.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.6

Varity_R

0.29

gMVP

0.71

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