Genetic Variant SLC35D1:p.Ile315Ile (chr1-67009099-A-T) – ACMG Classification: Likely_benign (-5 pts)

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2BP4_StrongBP6_ModerateBP7

The NM_015139.3(SLC35D1):c.945T>A(p.Ile315Ile) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000744 in 1,343,764 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 7.4e-7 ( 0 hom. )

Consequence

SLC35D1
NM_015139.3 synonymous

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 2.18

Publications

0 publications found

Variant links:

Genes affected

SLC35D1 (HGNC:20800): (solute carrier family 35 member D1) Glycosylation of cellular glycoconjugates occurs in the endoplasmic reticulum (ER) and Golgi compartment, and requires transport of nucleotide sugars from the cytosol into the lumen of the ER and Golgi by specific transporters. The protein encoded by this gene resides in the ER, and transports both UDP-glucuronic acid (UDP-GlcA) and UDP-N-acetylgalactosamine (UDP-GalNAc) from the cytoplasm to the ER lumen. It may participate in glucuronidation and/or chondroitin sulfate biosynthesis. Mutations in this gene are associated with Schneckenbecken dysplasia.[provided by RefSeq, Sep 2009]

SLC35D1 Gene-Disease associations (from GenCC):

schneckenbecken dysplasia
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, Labcorp Genetics (formerly Invitae)

SLC35D1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.54).

BP6

Variant 1-67009099-A-T is Benign according to our data. Variant chr1-67009099-A-T is described in ClinVar as [Likely_benign]. Clinvar id is 1397927.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=2.18 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC35D1	NM_015139.3 link	c.945T>A	p.Ile315Ile	synonymous_variant	Exon 11 of 12	ENST00000235345.6	NP_055954.1	Q9NTN3-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SLC35D1	ENST00000235345.6 link	c.945T>A	p.Ile315Ile	synonymous_variant	Exon 11 of 12	1	NM_015139.3	ENSP00000235345.5		Q9NTN3-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

7.44e-7

AC:

AN:

1343764

Hom.:

Cov.:

AF XY:

0.00000148

AC XY:

AN XY:

674338

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:

31146

American (AMR)

AF:

0.00

AC:

AN:

44238

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

24958

East Asian (EAS)

AF:

0.00

AC:

AN:

38704

South Asian (SAS)

AF:

0.00

AC:

AN:

82920

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52552

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5514

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1007626

Other (OTH)

AF:

0.0000178

AC:

AN:

56106

⚠️ 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

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Schneckenbecken dysplasia

Benign:1

Feb 24, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.54

CADD

Benign

9.8

(source)

DANN

Benign

0.74

PhyloP100

2.2

Mutation Taster

=99/1

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.070

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

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over