9-98808001-C-T

Variant names:

• chr9-98808001-C-T
• rs201926457
• NM_024642.5:c.303C>T

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP7

The NM_024642.5(GALNT12):​c.303C>T​(p.His101His) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: GALNT12 NM_024642.5 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.18
• Publications: 0 publications found

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)

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.34).
• BP7: Synonymous conserved (PhyloP=1.17 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GALNT12	NM_024642.5	c.303C>T	p.His101His	synonymous_variant	Exon 1 of 10	ENST00000375011.4	NP_078918.3
GALNT12	XM_006717287.1	c.-726C>T		upstream_gene_variant			XP_006717350.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GALNT12	ENST00000375011.4	c.303C>T	p.His101His	synonymous_variant	Exon 1 of 10	1	NM_024642.5	ENSP00000364150.3
GALNT12	ENST00000610463.1	n.-4C>T		upstream_gene_variant		4		ENSP00000477657.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1396612 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 690096

African (AFR) AF: 0.00 AC: 0 AN: 32230

American (AMR) AF: 0.00 AC: 0 AN: 36696

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25100

East Asian (EAS) AF: 0.00 AC: 0 AN: 36894

South Asian (SAS) AF: 0.00 AC: 0 AN: 78822

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 42170

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4172

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1082568

Other (OTH) AF: 0.00 AC: 0 AN: 57960

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.34
CADD	Benign	12
DANN	Uncertain	0.97
PhyloP100		1.2
PromoterAI		-0.0094	Neutral

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

Other links and lift over

dbSNP: rs201926457; hg19: chr9-101570283;