Genetic Variant NM_003361.4:c.1860G>A (chr16-20335483-C-T) – ACMG Classification: Likely_benign (-3 pts)

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2BP4_StrongBP7

The NM_003361.4(UMOD):c.1860G>A(p.Leu620Leu) variant causes a splice region, synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,822 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

UMOD
NM_003361.4 splice_region, synonymous

Scores

Splicing: ADA: 0.0002712

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.109

Publications

0 publications found

Variant links:

Genes affected

UMOD (HGNC:12559): (uromodulin) The protein encoded by this gene is the most abundant protein in mammalian urine under physiological conditions. Its excretion in urine follows proteolytic cleavage of the ectodomain of its glycosyl phosphatidylinosital-anchored counterpart that is situated on the luminal cell surface of the loop of Henle. This protein may act as a constitutive inhibitor of calcium crystallization in renal fluids. Excretion of this protein in urine may provide defense against urinary tract infections caused by uropathogenic bacteria. Defects in this gene are associated with the renal disorders medullary cystic kidney disease-2 (MCKD2), glomerulocystic kidney disease with hyperuricemia and isosthenuria (GCKDHI), and familial juvenile hyperuricemic nephropathy (FJHN). Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, Jul 2013]

UMOD Gene-Disease associations (from GenCC):

autosomal dominant medullary cystic kidney disease with or without hyperuricemia
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
glomerulocystic kidney disease with hyperuricemia and isosthenuria
Inheritance: AD Classification: DEFINITIVE Submitted by: Laboratory for Molecular Medicine
familial juvenile hyperuricemic nephropathy type 1
Inheritance: AD, Unknown Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae)
autosomal dominant medullary cystic kidney disease with hyperuricemia
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

UMOD links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.75).

BP7

Synonymous conserved (PhyloP=0.109 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
UMOD	NM_003361.4 link	c.1860G>A	p.Leu620Leu	splice_region_variant, synonymous_variant	Exon 10 of 11	ENST00000396138.9	NP_003352.2	P07911-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
UMOD	ENST00000396138.9 link	c.1860G>A	p.Leu620Leu	splice_region_variant, synonymous_variant	Exon 10 of 11	5	NM_003361.4	ENSP00000379442.5	P07911-1X6RBG4
UMOD	ENST00000396134.6 link	c.1959G>A	p.Leu653Leu	splice_region_variant, synonymous_variant	Exon 11 of 12	2		ENSP00000379438.2	P07911-5
UMOD	ENST00000570689.5 link	c.1860G>A	p.Leu620Leu	splice_region_variant, synonymous_variant	Exon 10 of 11	5		ENSP00000460548.1	P07911-1
UMOD	ENST00000570331.1 link	n.625G>A		splice_region_variant, non_coding_transcript_exon_variant	Exon 5 of 6	5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461822

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727200

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39698

South Asian (SAS)

AF:

0.00

AC:

AN:

86242

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111964

Other (OTH)

AF:

0.00

AC:

AN:

60392

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.75

CADD

Benign

7.0

(source)

DANN

Benign

0.67

PhyloP100

0.11

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00027

dbscSNV1_RF

Benign

0.074

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

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NM_003361.4:c.1860G>A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over