rs16917929

Positions:

• chr9-98831937-A-G
• chr9-98831937-A-T

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BA1

The NM_024642.5(GALNT12):​c.897A>G​(p.Gln299Gln) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00685 in 1,613,826 control chromosomes in the GnomAD database, including 673 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.037 (362 hom., cov: 32)
  • Exomes 𝑓: 0.0037 (311 hom.)
• Consequence: GALNT12 NM_024642.5 synonymous
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:6
• Conservation: PhyloP100: -0.562

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 Benign. Variant got -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BP6: Variant 9-98831937-A-G is Benign according to our data. Variant chr9-98831937-A-G is described in ClinVar as [Benign]. Clinvar id is 416216.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr9-98831937-A-G is described in Lovd as [Benign].
• BP7: Synonymous conserved (PhyloP=-0.562 with no splicing effect.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.126 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GALNT12	NM_024642.5	c.897A>G	p.Gln299Gln	synonymous_variant	4/10	ENST00000375011.4	NP_078918.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GALNT12	ENST00000375011.4	c.897A>G	p.Gln299Gln	synonymous_variant	4/10	1	NM_024642.5	ENSP00000364150.3
GALNT12	ENST00000610463.1	n.*328A>G		non_coding_transcript_exon_variant	3/4	4		ENSP00000477657.1
GALNT12	ENST00000610463.1	n.*328A>G		3_prime_UTR_variant	3/4	4		ENSP00000477657.1

Frequencies

GnomAD3 genomes AF: 0.0368 AC: 5598 AN: 151970 Hom.: 360 Cov.: 32

Gnomad AFR AF: 0.129

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0105

Gnomad ASJ AF: 0.00404

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000829

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00633

Gnomad NFE AF: 0.000221

Gnomad OTH AF: 0.0311

GnomAD3 exomes AF: 0.00959 AC: 2409 AN: 251078 Hom.: 147 AF XY: 0.00686 AC XY: 931 AN XY: 135712

Gnomad AFR exome AF: 0.131

Gnomad AMR exome AF: 0.00547

Gnomad ASJ exome AF: 0.00357

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000295

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000194

Gnomad OTH exome AF: 0.00490

GnomAD4 exome AF: 0.00373 AC: 5450 AN: 1461738 Hom.: 311 Cov.: 32 AF XY: 0.00314 AC XY: 2285 AN XY: 727164

Gnomad4 AFR exome AF: 0.133

Gnomad4 AMR exome AF: 0.00631

Gnomad4 ASJ exome AF: 0.00344

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000302

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000701

Gnomad4 OTH exome AF: 0.00835

GnomAD4 genome AF: 0.0369 AC: 5608 AN: 152088 Hom.: 362 Cov.: 32 AF XY: 0.0359 AC XY: 2671 AN XY: 74348

Gnomad4 AFR AF: 0.129

Gnomad4 AMR AF: 0.0105

Gnomad4 ASJ AF: 0.00404

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000830

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000221

Gnomad4 OTH AF: 0.0308

Alfa AF: 0.00815 Hom.: 128

Bravo AF: 0.0413

Asia WGS AF: 0.0120 AC: 44 AN: 3478

EpiCase AF: 0.000218

EpiControl AF: 0.000356

ClinVar

Significance: Benign

Submissions summary: Benign:6

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:3

Benign, criteria provided, single submitter	clinical testing	GeneDx	Jun 22, 2018	- -
Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 30, 2024	- -

not specified Benign:2

Benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Aug 18, 2016	This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -
Benign, criteria provided, single submitter	clinical testing	Quest Diagnostics Nichols Institute San Juan Capistrano	May 24, 2021	- -

GALNT12-related disorder Benign:1

Benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jul 18, 2019

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	0.47
DANN	Benign	0.33
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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: rs16917929; hg19: chr9-101594219;