Variant X-120626217-T-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2

The NM_001011551.3(C1GALT1C1):c.950A>G(p.Asn317Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000826 in 1,089,820 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 5 hemizygotes in GnomAD. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 24)

Exomes 𝑓: 0.0000083 ( 0 hom. 5 hem. )

Consequence

C1GALT1C1
NM_001011551.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.61

Variant links:

Genes affected

C1GALT1C1 (HGNC:24338): (C1GALT1 specific chaperone 1) This gene encodes a type II transmembrane protein that is similar to the core 1 beta1,3-galactosyltransferase 1, which catalyzes the synthesis of the core-1 structure, also known as Thomsen-Friedenreich antigen, on O-linked glycans. This gene product lacks the galactosyltransferase activity itself, but instead acts as a molecular chaperone required for the folding, stability and full activity of the core 1 beta1,3-galactosyltransferase 1. Mutations in this gene have been associated with Tn syndrome. Alternatively spliced transcript variants encoding the same protein have been identified. [provided by RefSeq, Dec 2009]

C1GALT1C1 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

BS2

High Hemizygotes in GnomAdExome4 at 5 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
C1GALT1C1	NM_001011551.3 linkuse as main transcript	c.950A>G	p.Asn317Ser	missense_variant	2/2	ENST00000304661.6
C1GALT1C1	NM_152692.5 linkuse as main transcript	c.950A>G	p.Asn317Ser	missense_variant	3/3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
C1GALT1C1	ENST00000304661.6 linkuse as main transcript	c.950A>G	p.Asn317Ser	missense_variant	2/2	1	NM_001011551.3	P1
C1GALT1C1	ENST00000371313.2 linkuse as main transcript	c.950A>G	p.Asn317Ser	missense_variant	3/3	1		P1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000170

AC:

AN:

176908

Hom.:

AF XY:

0.0000484

AC XY:

AN XY:

61958

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000146

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000252

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000826

AC:

AN:

1089820

Hom.:

Cov.:

AF XY:

0.0000140

AC XY:

AN XY:

356306

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.0000524

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000957

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ExAC

AF:

0.0000330

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 31, 2024

The c.950A>G (p.N317S) alteration is located in exon 3 (coding exon 1) of the C1GALT1C1 gene. This alteration results from a A to G substitution at nucleotide position 950, causing the asparagine (N) at amino acid position 317 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.21

BayesDel_addAF

Benign

-0.15

BayesDel_noAF

Benign

-0.45

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.22

T;T

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Benign

0.65

.;T

M_CAP

Pathogenic

0.46

MetaRNN

Uncertain

0.59

D;D

MetaSVM

Benign

-0.72

MutationAssessor

Uncertain

2.8

M;M

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.59

PROVEAN

Benign

-1.8

N;N

REVEL

Benign

0.14

Sift

Uncertain

0.0070

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

D;D

Vest4

0.52

MutPred

0.21

Gain of phosphorylation at N317 (P = 0.0223);Gain of phosphorylation at N317 (P = 0.0223);

MVP

0.64

MPC

0.86

ClinPred

0.57

GERP RS

5.5

Varity_R

0.36

gMVP

0.96

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over