chr18-36187579-A-T

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_017947.4(MOCOS):c.40A>T(p.Thr14Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000152 in 1,246,674 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 0.000039 ( 0 hom., cov: 34)

Exomes 𝑓: 0.000012 ( 0 hom. )

Consequence

MOCOS
NM_017947.4 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 0.127

Variant links:

Genes affected

MOCOS (HGNC:18234): (molybdenum cofactor sulfurase) This gene encodes an enzyme that sulfurates the molybdenum cofactor which is required for activation of the xanthine dehydrogenase (XDH) and aldehyde oxidase (AO) enzymes. XDH catalyzes the conversion of hypoxanthine to uric acid via xanthine, as well as the conversion of allopurinol to oxypurinol, and pyrazinamide to 5-hydroxy pyrazinamide. Mutations in this gene cause the metabolic disorder classical xanthinuria type II which is characterized by the loss of XDH/XO and AO enzyme activity, decreased levels of uric acid in the urine, increased levels of xanthine and hypoxanthine in the serum and urine, formation of xanthine stones in the urinary tract, and myositis due to tissue deposition of xanthine. [provided by RefSeq, Apr 2017]

MOCOS links:

COSMOC (HGNC:51610): (cell fate and sterol metabolism associated divergent transcript of MOCOS)

COSMOC links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.0044104755).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MOCOS	NM_017947.4 link	c.40A>T	p.Thr14Ser	missense_variant	Exon 1 of 15	ENST00000261326.6	NP_060417.4	Q96EN8
COSMOC	NR_134605.1 link	n.-144T>A		upstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
MOCOS	ENST00000261326.6 link	c.40A>T	p.Thr14Ser	missense_variant	Exon 1 of 15	1	NM_017947.4	ENSP00000261326.4	Q96EN8
COSMOC	ENST00000568654.2 link	n.-120T>A		upstream_gene_variant		1
COSMOC	ENST00000687261.2 link	n.-104T>A		upstream_gene_variant

Frequencies

GnomAD3 genomes

AF:

0.0000395

AC:

AN:

152044

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00115

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:

0.000478

GnomAD3 exomes

AF:

0.0000525

AC:

AN:

19046

Hom.:

AF XY:

0.00

AC XY:

AN XY:

10750

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000963

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000119

AC:

AN:

1094630

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

519240

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000323

Gnomad4 ASJ exome

AF:

0.000207

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000455

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000324

Gnomad4 OTH exome

AF:

0.0000679

GnomAD4 genome

AF:

0.0000395

AC:

AN:

152044

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74256

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00115

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000478

Bravo

AF:

0.0000491

ExAC

AF:

0.0000106

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Xanthinuria type II

Uncertain:2

Jan 22, 2022

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Oct 22, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces threonine, which is neutral and polar, with serine, which is neutral and polar, at codon 14 of the MOCOS protein (p.Thr14Ser). This variant is present in population databases (rs779808561, gnomAD 0.2%). This variant has not been reported in the literature in individuals affected with MOCOS-related conditions. ClinVar contains an entry for this variant (Variation ID: 1432921). An algorithm developed to predict the effect of missense changes on protein structure and function outputs the following: PolyPhen-2: "Benign". 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.074

BayesDel_addAF

Benign

-0.42

BayesDel_noAF

Benign

-0.85

CADD

Benign

1.1

DANN

Benign

0.45

DEOGEN2

Benign

0.020

Eigen

Benign

-1.4

Eigen_PC

Benign

-1.4

FATHMM_MKL

Benign

0.14

LIST_S2

Benign

0.19

M_CAP

Benign

0.012

MetaRNN

Benign

0.0044

MetaSVM

Benign

-0.95

MutationAssessor

Benign

0.34

PrimateAI

Uncertain

0.65

PROVEAN

Benign

0.0

REVEL

Benign

0.011

Sift

Benign

0.59

Sift4G

Benign

0.80

Polyphen

0.0010

Vest4

0.051

MutPred

0.16

Gain of phosphorylation at T14 (P = 0.0869);

MVP

0.19

MPC

1.3

ClinPred

0.024

GERP RS

-0.27

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.063

gMVP

0.16

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