7-101032210-T-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001040105.2(MUC17):c.794T>G(p.Leu265Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,848 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: MUC17 NM_001040105.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -1.29

Genes affected

MUC17 (HGNC:16800): (mucin 17, cell surface associated) The protein encoded by this gene is a membrane-bound mucin that provides protection to gut epithelial cells. The encoded protein contains about 60 tandem repeats, with each repeat being around 60 aa. N-glycosylation enables the encoded protein to localize on the cell surface, while the C-terminus interacts with the scaffold protein PDZ domain containing 1 (PDZK1). Two transcript variants, one protein-coding and the other non-protein coding, have been found for this gene. [provided by RefSeq, Nov 2015]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.052805036).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MUC17	NM_001040105.2	c.794T>G	p.Leu265Arg	missense_variant	3/13	ENST00000306151.9
MUC17	NR_133665.2	n.849T>G		non_coding_transcript_exon_variant	3/12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MUC17	ENST00000306151.9	c.794T>G	p.Leu265Arg	missense_variant	3/13	1	NM_001040105.2	P1
MUC17	ENST00000379439.3	c.794T>G	p.Leu265Arg	missense_variant, NMD_transcript_variant	3/12	1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000796 AC: 2 AN: 251308 Hom.: 0 AF XY: 0.00000736 AC XY: 1 AN XY: 135810

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000880

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461848 Hom.: 0 Cov.: 34 AF XY: 0.00000275 AC XY: 2 AN XY: 727212

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Alfa AF: 0.0000205 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 13, 2022

The c.794T>G (p.L265R) alteration is located in exon 3 (coding exon 3) of the MUC17 gene. This alteration results from a T to G substitution at nucleotide position 794, causing the leucine (L) at amino acid position 265 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.43	T
BayesDel_noAF	Benign	-0.77
Cadd	Benign	1.6
Dann	Benign	0.36
DEOGEN2	Benign	0.018	T
Eigen	Benign	-1.4
Eigen_PC	Benign	-1.5
FATHMM_MKL	Benign	0.0043	N
LIST_S2	Benign	0.21	T
M_CAP	Benign	0.0021	T
MetaRNN	Benign	0.053	T
MetaSVM	Benign	-0.90	T
MutationAssessor	Benign	-0.69	N
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.35	T
PROVEAN	Benign	-0.20	N
REVEL	Benign	0.0050
Sift	Uncertain	0.0050	D
Polyphen		0.011	B
Vest4		0.062
MutPred		0.20		Gain of methylation at L265 (P = 0.0251);
MVP		0.055
ClinPred		0.044	T
GERP RS		-0.42
Varity_R		0.083
gMVP		0.0081

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: rs371532269; hg19: chr7-100675491;