9-98807836-G-C

Variant names:

• chr9-98807836-G-C
• rs557604978
• NM_024642.5:c.138G>C

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2 BP4_Strong BP6_Moderate BP7

The NM_024642.5(GALNT12):​c.138G>C​(p.Gly46Gly) 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. Variant has been reported in ClinVar as Likely benign (★). Synonymous variant affecting the same amino acid position (i.e. G46G) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: GALNT12 NM_024642.5 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.0180
• 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, Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, ClinGen

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.76).
• BP6: Variant 9-98807836-G-C is Benign according to our data. Variant chr9-98807836-G-C is described in ClinVar as Likely_benign. ClinVar VariationId is 1771517.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-0.018 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_024642.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GALNT12	NM_024642.5	MANE Select	c.138G>C	p.Gly46Gly	synonymous	Exon 1 of 10	NP_078918.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GALNT12	ENST00000375011.4	TSL:1 MANE Select	c.138G>C	p.Gly46Gly	synonymous	Exon 1 of 10	ENSP00000364150.3	Q8IXK2-1
	GALNT12	ENST00000969913.1		c.138G>C	p.Gly46Gly	synonymous	Exon 1 of 11	ENSP00000639972.1
	GALNT12	ENST00000969912.1		c.138G>C	p.Gly46Gly	synonymous	Exon 1 of 11	ENSP00000639971.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.76
CADD	Benign	4.7
DANN	Benign	0.40
PhyloP100		-0.018
PromoterAI		-0.018	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.2

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: rs557604978; hg19: chr9-101570118;