rs137852855

Variant names:

• chr3-4467245-T-C
• rs137852855
• NM_182760.4:c.1A>G

Variant summary

Our verdict is Pathogenic. The variant received 20 ACMG points: 20P and 0B. PVS1 PS1_Moderate PM2 PP5_Very_Strong

The NM_182760.4(SUMF1):​c.1A>G​(p.Met1?) variant causes a start lost change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,455,566 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: SUMF1 NM_182760.4 start_lost
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 3.04
• Publications: 4 publications found

Genes affected

SUMF1 (HGNC:20376): (sulfatase modifying factor 1) This gene encodes an enzyme that catalyzes the hydrolysis of sulfate esters by oxidizing a cysteine residue in the substrate sulfatase to an active site 3-oxoalanine residue, which is also known as C-alpha-formylglycine. Mutations in this gene cause multiple sulfatase deficiency, a lysosomal storage disorder. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2009]

SUMF1 Gene-Disease associations (from GenCC):

• mucosulfatidosis

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: PanelApp Australia, Orphanet, Labcorp Genetics (formerly Invitae), Genomics England PanelApp, ClinGen, G2P

LOC124909340 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 20 ACMG points.

• PVS1: Start lost variant, next in-frame start position is after 26 pathogenic variants. Next in-frame start position is after 91 codons. Genomic position: 4453049. Lost 0.241 part of the original CDS.
• PS1: Another start lost variant in NM_182760.4 (SUMF1) was described as [Likely_pathogenic] in ClinVar
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 3-4467245-T-C is Pathogenic according to our data. Variant chr3-4467245-T-C is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 2679.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SUMF1	NM_182760.4	c.1A>G	p.Met1?	start_lost	Exon 1 of 9	ENST00000272902.10	NP_877437.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SUMF1	ENST00000272902.10	c.1A>G	p.Met1?	start_lost	Exon 1 of 9	1	NM_182760.4	ENSP00000272902.5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1455566 Hom.: 0 Cov.: 34 AF XY: 0.00000138 AC XY: 1 AN XY: 723586

African (AFR) AF: 0.00 AC: 0 AN: 33348

American (AMR) AF: 0.00 AC: 0 AN: 44128

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25978

East Asian (EAS) AF: 0.00 AC: 0 AN: 39434

South Asian (SAS) AF: 0.00 AC: 0 AN: 84912

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52654

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5428

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1109612

Other (OTH) AF: 0.00 AC: 0 AN: 60072

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Multiple sulfatase deficiency Pathogenic:3

May 16, 2003

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Sep 01, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change affects the initiator methionine of the SUMF1 mRNA. The next in-frame methionine is located at codon 91. This variant is not present in population databases (gnomAD no frequency). Disruption of the initiator codon has been observed in individual(s) with multiple sulfatase deficiency (PMID: 15146462). ClinVar contains an entry for this variant (Variation ID: 2679). This variant disrupts a region of the SUMF1 protein in which other variant(s) (p.Leu20Phe) have been observed in individuals with SUMF1-related conditions (PMID: 15146462). This suggests that this is a clinically significant region of the protein, and that variants that disrupt it are likely to be disease-causing. For these reasons, this variant has been classified as Pathogenic. -

Apr 23, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.56	D
BayesDel_noAF	Pathogenic	0.57
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.26	T;.;T;.
Eigen	Uncertain	0.42
Eigen_PC	Uncertain	0.42
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Uncertain	0.90	D;D;D;D
M_CAP	Pathogenic	0.99	D
MetaRNN	Pathogenic	0.99	D;D;D;D
MetaSVM	Pathogenic	0.96	D
PhyloP100		3.0
PROVEAN	Benign	-0.88	N;N;N;N
REVEL	Pathogenic	0.73
Sift	Pathogenic	0.0	D;D;D;D
Sift4G	Pathogenic	0.0	D;D;D;D
Polyphen		0.71	P;.;P;.
Vest4		0.93
MutPred		1.0		Gain of catalytic residue at M1 (P = 0.0836);Gain of catalytic residue at M1 (P = 0.0836);Gain of catalytic residue at M1 (P = 0.0836);Gain of catalytic residue at M1 (P = 0.0836);
MVP		0.94
ClinPred		1.0	D
GERP RS		4.7
PromoterAI		-0.91	Under-expression
Varity_R		0.93
gMVP		0.65
Mutation Taster		=4/196	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs137852855; hg19: chr3-4508929;