chr9-98807703-G-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_024642.5(GALNT12):c.5G>T(p.Trp2Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000408 in 1,152,368 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/22 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. W2S) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000040 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000041 ( 1 hom. )

Consequence

GALNT12
NM_024642.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:7

Conservation

PhyloP100: -1.30

Publications

2 publications found

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]

GALNT12 Gene-Disease associations (from GenCC):

colorectal cancer, susceptibility to, 1
Inheritance: AD Classification: LIMITED Submitted by: ClinGen, Ambry Genetics, Labcorp Genetics (formerly Invitae)

GALNT12 links:

ENSG00000285706 (HGNC:):

ENSG00000285706 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.010770321).

BS2

High AC in GnomAd4 at 6 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GALNT12	NM_024642.5 link	c.5G>T	p.Trp2Leu	missense_variant	Exon 1 of 10	ENST00000375011.4	NP_078918.3	Q8IXK2-1
LOC124902229	XR_007061689.1 link	n.-123C>A		upstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GALNT12	ENST00000375011.4 link	c.5G>T	p.Trp2Leu	missense_variant	Exon 1 of 10	1	NM_024642.5	ENSP00000364150.3		Q8IXK2-1
ENSG00000285706	ENST00000647710.1 link	n.-139C>A		upstream_gene_variant

Frequencies

GnomAD3 genomes

AF:

0.0000398

AC:

AN:

150728

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000484

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000296

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000141

AC:

AN:

7112

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00505

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000409

AC:

AN:

1001640

Hom.:

Cov.:

AF XY:

0.0000355

AC XY:

AN XY:

479476

show subpopulations

African (AFR)

AF:

0.0000514

AC:

AN:

19468

American (AMR)

AF:

0.00

AC:

AN:

5998

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

10302

East Asian (EAS)

AF:

0.00

AC:

AN:

15500

South Asian (SAS)

AF:

0.000311

AC:

AN:

25762

European-Finnish (FIN)

AF:

0.00

AC:

AN:

14474

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2420

European-Non Finnish (NFE)

AF:

0.0000367

AC:

AN:

870956

Other (OTH)

AF:

0.00

AC:

AN:

36760

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000398

AC:

AN:

150728

Hom.:

Cov.:

AF XY:

0.0000544

AC XY:

AN XY:

73592

show subpopulations

African (AFR)

AF:

0.0000484

AC:

AN:

41284

American (AMR)

AF:

0.00

AC:

AN:

15150

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3448

East Asian (EAS)

AF:

0.00

AC:

AN:

5152

South Asian (SAS)

AF:

0.000414

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10004

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.0000296

AC:

AN:

67558

Other (OTH)

AF:

0.00

AC:

AN:

2074

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.467

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000718

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Colorectal cancer, susceptibility to, 1

Uncertain:3

Mar 22, 2024

Baylor Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Nov 05, 2023

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Apr 24, 2024

Fulgent Genetics, Fulgent Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Uncertain:2

Aug 06, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces tryptophan, which is neutral and slightly polar, with leucine, which is neutral and non-polar, at codon 2 of the GALNT12 protein (p.Trp2Leu). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with GALNT12-related conditions. ClinVar contains an entry for this variant (Variation ID: 485653). An algorithm developed to predict the effect of missense changes on protein structure and function outputs the following: PolyPhen-2: "Not Available". The leucine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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. -

Feb 09, 2024

Quest Diagnostics Nichols Institute San Juan Capistrano

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The GALNT12 c.5G>T (p.Trp2Leu) variant has not been reported in individuals with GALNT12-related conditions in the published literature. The frequency of this variant in the general population, 0.000055 (2/36452 chromosomes (Genome Aggregation Database, http://gnomad.broadinstitute.org)), is uninformative in the assessment of its pathogenicity. Analysis of this variant using bioinformatics tools for the prediction of the effect of amino acid changes on protein structure and function yielded predictions that this variant is benign. Based on the available information, we are unable to determine the clinical significance of this variant. -

not specified

Uncertain:1

May 04, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.5G>T (p.W2L) alteration is located in exon 1 (coding exon 1) of the GALNT12 gene. This alteration results from a G to T substitution at nucleotide position 5, causing the tryptophan (W) at amino acid position 2 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

GALNT12-related disorder

Uncertain:1

Apr 08, 2024

PreventionGenetics, part of Exact Sciences

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

The GALNT12 c.5G>T variant is predicted to result in the amino acid substitution p.Trp2Leu. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.023% of alleles in individuals of African descent in gnomAD and is interpreted as uncertain significance in ClinVar (https://www.ncbi.nlm.nih.gov/clinvar/variation/485653/). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.068

BayesDel_addAF

Benign

-0.15

BayesDel_noAF

Benign

-0.46

CADD

Benign

(source)

DANN

Benign

0.94

DEOGEN2

Benign

0.011

Eigen

Benign

-1.3

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.21

LIST_S2

Benign

0.35

M_CAP

Uncertain

0.12

MetaRNN

Benign

0.011

MetaSVM

Benign

-0.99

MutationAssessor

Benign

0.0

PhyloP100

-1.3

PrimateAI

Pathogenic

0.84

PROVEAN

Benign

0.84

REVEL

Benign

0.097

Sift

Pathogenic

0.0

Sift4G

Benign

0.30

Polyphen

0.0

Vest4

0.16

MutPred

0.33

Gain of methylation at R4 (P = 0.0316);

MVP

0.20

MPC

2.6

ClinPred

0.12

GERP RS

-3.9

PromoterAI

0.18

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.6

Varity_R

0.15

gMVP

0.37

Mutation Taster

=92/8

polymorphism

(source)

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

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chr9-98807703-G-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over