ENST00000675028.1:c.746C>G

Variant names:

• chr11-1078394-C-G
• rs41501548
• ENST00000675028.1:c.746C>G

Variant summary

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

The ENST00000675028.1(MUC2):​c.746C>G​(p.Ala249Gly) variant causes a missense change. The variant allele was found at a frequency of 0.00000498 in 1,405,902 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A249V) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 0.0000050 (0 hom.)
• Consequence: MUC2 ENST00000675028.1 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.88

Genes affected

MUC2 (HGNC:7512): (mucin 2, oligomeric mucus/gel-forming) This gene encodes a member of the mucin protein family. Mucins are high molecular weight glycoproteins produced by many epithelial tissues. The protein encoded by this gene is secreted and forms an insoluble mucous barrier that protects the gut lumen. The protein polymerizes into a gel of which 80% is composed of oligosaccharide side chains by weight. The protein features a central domain containing tandem repeats rich in threonine and proline that varies between 50 and 115 copies in different individuals. Downregulation of this gene has been observed in patients with Crohn disease and ulcerative colitis. [provided by RefSeq, Oct 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MUC2	NM_002457.5	c.746C>G	p.Ala249Gly	missense_variant	Exon 6 of 58		NP_002448.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MUC2	ENST00000675028.1	c.746C>G	p.Ala249Gly	missense_variant	Exon 6 of 30			ENSP00000502432.1
MUC2	ENST00000361558.7	n.773C>G		non_coding_transcript_exon_variant	Exon 6 of 49	5

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD3 exomes AF: 0.0000382 AC: 6 AN: 157190 Hom.: 0 AF XY: 0.0000347 AC XY: 3 AN XY: 86438

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000246

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000498 AC: 7 AN: 1405902 Hom.: 0 Cov.: 37 AF XY: 0.00000431 AC XY: 3 AN XY: 695984

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000862

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 34

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Uncertain	-0.030
CADD	Benign	22
DANN	Benign	0.96

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: rs41501548; hg19: chr11-1078538;