9-98831816-T-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PP3_ModerateBS2

The NM_024642.5(GALNT12):ā€‹c.776T>Gā€‹(p.Val259Gly) variant causes a missense change. The variant allele was found at a frequency of 0.000013 in 1,461,888 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 Uncertain significance (ā˜…ā˜…).

Frequency

Genomes: not found (cov: 32)
Exomes š‘“: 0.000013 ( 0 hom. )

Consequence

GALNT12
NM_024642.5 missense

Scores

6
9
4

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 4.21
Variant links:
Genes affected
GALNT12 (HGNC:19877): (polypeptide N-acetylgalactosaminyltransferase 12) This gene encodes a member of a family of UDP-GalNAc:polypeptide N-acetylgalactosaminyltransferases, which catalyze the transfer of N-acetylgalactosamine (GalNAc) from UDP-GalNAc to a serine or threonine residue on a polypeptide acceptor in the initial step of O-linked protein glycosylation. Mutations in this gene are associated with an increased susceptibility to colorectal cancer.[provided by RefSeq, Mar 2011]

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PP3
MetaRNN computational evidence supports a deleterious effect, 0.859
BS2
High AC in GnomAdExome4 at 19 AD gene.

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE Protein UniProt
GALNT12NM_024642.5 linkc.776T>G p.Val259Gly missense_variant 4/10 ENST00000375011.4 NP_078918.3 Q8IXK2-1

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Protein Appris UniProt
GALNT12ENST00000375011.4 linkc.776T>G p.Val259Gly missense_variant 4/101 NM_024642.5 ENSP00000364150.3 Q8IXK2-1
GALNT12ENST00000610463.1 linkn.*207T>G non_coding_transcript_exon_variant 3/44 ENSP00000477657.1 A0A087WT76
GALNT12ENST00000610463.1 linkn.*207T>G 3_prime_UTR_variant 3/44 ENSP00000477657.1 A0A087WT76

Frequencies

GnomAD3 genomes
Cov.:
32
GnomAD4 exome
AF:
0.0000130
AC:
19
AN:
1461888
Hom.:
0
Cov.:
32
AF XY:
0.0000110
AC XY:
8
AN XY:
727248
show subpopulations
Gnomad4 AFR exome
AF:
0.00
Gnomad4 AMR exome
AF:
0.00
Gnomad4 ASJ exome
AF:
0.00
Gnomad4 EAS exome
AF:
0.00
Gnomad4 SAS exome
AF:
0.00
Gnomad4 FIN exome
AF:
0.00
Gnomad4 NFE exome
AF:
0.0000171
Gnomad4 OTH exome
AF:
0.00
GnomAD4 genome
Cov.:
32
Bravo
AF:
0.00000378

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:3
Revision: criteria provided, multiple submitters, no conflicts
LINK: link

Submissions by phenotype

not specified Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingAmbry GeneticsFeb 20, 2024The p.V259G variant (also known as c.776T>G), located in coding exon 4 of the GALNT12 gene, results from a T to G substitution at nucleotide position 776. The valine at codon 259 is replaced by glycine, an amino acid with dissimilar properties. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -
not provided Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingLabcorp Genetics (formerly Invitae), LabcorpJul 06, 2022ClinVar contains an entry for this variant (Variation ID: 962513). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. This variant has not been reported in the literature in individuals affected with GALNT12-related conditions. This sequence change replaces valine, which is neutral and non-polar, with glycine, which is neutral and non-polar, at codon 259 of the GALNT12 protein (p.Val259Gly). This variant is not present in population databases (gnomAD no frequency). -
Colorectal cancer, susceptibility to, 1 Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingBaylor GeneticsJan 11, 2024- -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
0.61
BayesDel_addAF
Pathogenic
0.30
D
BayesDel_noAF
Pathogenic
0.20
CADD
Pathogenic
29
DANN
Uncertain
1.0
DEOGEN2
Benign
0.20
T
Eigen
Uncertain
0.66
Eigen_PC
Uncertain
0.63
FATHMM_MKL
Pathogenic
0.97
D
LIST_S2
Benign
0.81
T
M_CAP
Uncertain
0.086
D
MetaRNN
Pathogenic
0.86
D
MetaSVM
Benign
-0.35
T
MutationAssessor
Uncertain
2.8
M
PrimateAI
Uncertain
0.68
T
PROVEAN
Pathogenic
-4.7
D
REVEL
Uncertain
0.56
Sift
Uncertain
0.026
D
Sift4G
Uncertain
0.048
D
Polyphen
1.0
D
Vest4
0.69
MutPred
0.58
Loss of stability (P = 0.0299);
MVP
0.91
MPC
0.71
ClinPred
1.0
D
GERP RS
5.7
Varity_R
0.90
gMVP
0.89

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.

Other links and lift over

dbSNP: rs147356342; hg19: chr9-101594098; API