Genetic Variant NM_004531.5:c.539_540delAA (chr5-53098628-CTT-C) – ACMG Classification: Pathogenic (10 pts)

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PVS1_ModeratePP5_Very_Strong

The NM_004531.5(MOCS2):c.539_540delAA(p.Lys180ArgfsTer31) variant causes a frameshift change. The variant allele was found at a frequency of 0.000107 in 1,613,776 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. K180K) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00011 ( 0 hom. )

Consequence

MOCS2
NM_004531.5 frameshift

Scores

Not classified

Clinical Significance

Likely pathogenic criteria provided, multiple submitters, no conflicts P:6

Conservation

PhyloP100: 4.69

Publications

8 publications found

Variant links:

Genes affected

MOCS2 (HGNC:7193): (molybdenum cofactor synthesis 2) Eukaryotic molybdoenzymes use a unique molybdenum cofactor (MoCo) consisting of a pterin, termed molybdopterin, and the catalytically active metal molybdenum. MoCo is synthesized from precursor Z by the heterodimeric enzyme molybdopterin synthase. The large and small subunits of molybdopterin synthase are both encoded from this gene by overlapping open reading frames. The proteins were initially thought to be encoded from a bicistronic transcript. They are now thought to be encoded from monocistronic transcripts. Alternatively spliced transcripts have been found for this locus that encode the large and small subunits. [provided by RefSeq, Jul 2008]

MOCS2 Gene-Disease associations (from GenCC):

sulfite oxidase deficiency due to molybdenum cofactor deficiency type B
Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics

MOCS2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 10 ACMG points.

PVS1

Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.0494 CDS is truncated, and there are 2 pathogenic variants in the truncated region.

PP5

Variant 5-53098628-CTT-C is Pathogenic according to our data. Variant chr5-53098628-CTT-C is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 6108.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004531.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MOCS2	NM_004531.5	MANE Select	c.539_540delAA	p.Lys180ArgfsTer31	frameshift	Exon 7 of 7	NP_004522.1	O96007
	MOCS2	NM_176806.4	MANE Plus Clinical	c.459_460delAA		3_prime_UTR	Exon 7 of 7	NP_789776.1	O96033

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
MOCS2	ENST00000396954.8	TSL:1 MANE Select	c.539_540delAA	p.Lys180ArgfsTer31	frameshift	Exon 7 of 7	ENSP00000380157.3	O96007
MOCS2	ENST00000450852.8	TSL:1 MANE Plus Clinical	c.459_460delAA		3_prime_UTR	Exon 7 of 7	ENSP00000411022.3	O96033
MOCS2	ENST00000855413.1		c.539_540delAA	p.Lys180ArgfsTer31	frameshift	Exon 7 of 7	ENSP00000525472.1

Frequencies

GnomAD3 genomes

AF:

0.000112

AC:

AN:

152206

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

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:

0.000162

Gnomad OTH

AF:

0.000957

GnomAD2 exomes

AF:

0.000104

AC:

AN:

251092

AF XY:

0.000118

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.000347

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000705

Gnomad OTH exome

AF:

0.000816

GnomAD4 exome

AF:

0.000106

AC:

155

AN:

1461570

Hom.:

AF XY:

0.000103

AC XY:

AN XY:

727112

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33468

American (AMR)

AF:

0.000403

AC:

AN:

44712

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26126

East Asian (EAS)

AF:

0.0000505

AC:

AN:

39628

South Asian (SAS)

AF:

0.0000232

AC:

AN:

86252

European-Finnish (FIN)

AF:

0.0000562

AC:

AN:

53414

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

0.000111

AC:

123

AN:

1111828

Other (OTH)

AF:

0.0000994

AC:

AN:

60378

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.450

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000112

AC:

AN:

152206

Hom.:

Cov.:

AF XY:

0.0000941

AC XY:

AN XY:

74370

show subpopulations

African (AFR)

AF:

0.0000482

AC:

AN:

41458

American (AMR)

AF:

0.000131

AC:

AN:

15280

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5198

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.000162

AC:

AN:

68032

Other (OTH)

AF:

0.000957

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.487

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000756

EpiCase

AF:

0.000218

EpiControl

AF:

0.000119

ClinVar

ClinVar submissions

Significance:Likely pathogenic

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

Sulfite oxidase deficiency due to molybdenum cofactor deficiency type B (3)

not provided (2)

Abnormality of metabolism/homeostasis (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

PhyloP100

4.7

Mutation Taster

=3/197

disease causing (ClinVar)

(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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over