1-67009141-C-A

Variant names:

• chr1-67009141-C-A
• rs1185304647
• NM_015139.3:c.903G>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_015139.3(SLC35D1):​c.903G>T​(p.Met301Ile) variant causes a missense change. The variant allele was found at a frequency of 0.000000759 in 1,317,036 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. M301T) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.6e-7 (0 hom.)
• Consequence: SLC35D1 NM_015139.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.13
• Publications: 0 publications found

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: PanelApp Australia, Labcorp Genetics (formerly Invitae), G2P, ClinGen, Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015139.3. 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
	SLC35D1	NM_015139.3	MANE Select	c.903G>T	p.Met301Ile	missense	Exon 11 of 12	NP_055954.1	Q9NTN3-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SLC35D1	ENST00000235345.6	TSL:1 MANE Select	c.903G>T	p.Met301Ile	missense	Exon 11 of 12	ENSP00000235345.5	Q9NTN3-1
	SLC35D1	ENST00000901512.1		c.984G>T	p.Met328Ile	missense	Exon 12 of 13	ENSP00000571571.1
	SLC35D1	ENST00000901514.1		c.900G>T	p.Met300Ile	missense	Exon 11 of 12	ENSP00000571573.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 7.59e-7 AC: 1 AN: 1317036 Hom.: 0 Cov.: 20 AF XY: 0.00 AC XY: 0 AN XY: 661456

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

African (AFR) AF: 0.00 AC: 0 AN: 30480

American (AMR) AF: 0.00 AC: 0 AN: 43892

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 24634

East Asian (EAS) AF: 0.00 AC: 0 AN: 38398

South Asian (SAS) AF: 0.0000124 AC: 1 AN: 80836

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51824

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5416

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 986502

Other (OTH) AF: 0.00 AC: 0 AN: 55054

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.89
BayesDel_addAF	Pathogenic	0.29	D
BayesDel_noAF	Pathogenic	0.18
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.44	T
Eigen	Uncertain	0.35
Eigen_PC	Uncertain	0.50
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.93	D
M_CAP	Benign	0.016	T
MetaRNN	Uncertain	0.72	D
MetaSVM	Benign	-0.89	T
MutationAssessor	Uncertain	2.2	M
PhyloP100		7.1
PrimateAI	Pathogenic	0.85	D
PROVEAN	Uncertain	-2.9	D
REVEL	Uncertain	0.35
Sift	Benign	0.085	T
Sift4G	Benign	0.14	T
Polyphen		0.43	B
Vest4		0.83
MutPred		0.59		Gain of catalytic residue at M301 (P = 0.3342)
MVP		0.78
MPC		0.29
ClinPred		0.98	D
GERP RS		6.0
Varity_R		0.59
gMVP		0.86
Mutation Taster		=58/42	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
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

Other links and lift over

dbSNP: rs1185304647; hg19: chr1-67474824;