rs568625965

chr9-98807718-G-Achr9-98807718-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_024642.5(GALNT12):c.20G>A(p.Arg7Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000195 in 1,026,358 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R7G) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.0 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000019 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: GALNT12 NM_024642.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.989

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.1783219).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GALNT12	NM_024642.5	c.20G>A	p.Arg7Gln	missense_variant	1/10	ENST00000375011.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GALNT12	ENST00000375011.4	c.20G>A	p.Arg7Gln	missense_variant	1/10	1	NM_024642.5	P1

Frequencies

GnomAD3 genomes AF: 0.00 AC: 0 AN: 150328 Hom.: 0 Cov.: 32 FAILED QC

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000195 AC: 2 AN: 1026358 Hom.: 0 Cov.: 30 AF XY: 0.00000202 AC XY: 1 AN XY: 494698

Gnomad4 AFR exome AF: 0.0000504

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000316

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 150328 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 73364

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Bravo AF: 0.0000189

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 06, 2024

The p.R7Q variant (also known as c.20G>A), located in coding exon 1 of the GALNT12 gene, results from a G to A substitution at nucleotide position 20. The arginine at codon 7 is replaced by glutamine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.43
Cadd	Benign	21
Dann	Benign	0.96
DEOGEN2	Benign	0.013	T
Eigen	Benign	-0.22
Eigen_PC	Benign	-0.26
FATHMM_MKL	Benign	0.58	D
LIST_S2	Benign	0.56	T
M_CAP	Pathogenic	0.37	D
MetaRNN	Benign	0.18	T
MetaSVM	Benign	-0.91	T
MutationAssessor	Benign	0.0	N
MutationTaster	Benign	0.99	N
PrimateAI	Pathogenic	0.85	D
PROVEAN	Benign	0.29	N
REVEL	Benign	0.10
Sift	Benign	0.36	T
Sift4G	Benign	0.36	T
Polyphen		0.91	P
Vest4		0.081
MutPred		0.39		Loss of phosphorylation at T5 (P = 0.0901);
MVP		0.56
MPC		2.0
ClinPred		0.23	T
GERP RS		3.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.0
Varity_R		0.10
gMVP		0.46

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

Other links and lift over

dbSNP: rs568625965; hg19: chr9-101570000;