6-31026174-T-C

Position:

• chr6-31026174-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001395414.1(MUC22):​c.743T>C​(p.Ile248Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000146 in 1,371,952 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000015 (0 hom.)
• Consequence: MUC22 NM_001395414.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.495

Genes affected

MUC22 (HGNC:39755): (mucin 22) Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.07610062).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MUC22	NM_001395414.1	c.743T>C	p.Ile248Thr	missense_variant	2/4	ENST00000561890.1	NP_001382343.1
MUC22	NM_001318484.1	c.752T>C	p.Ile251Thr	missense_variant	3/5		NP_001305413.1
MUC22	NM_001198815.1	c.743T>C	p.Ile248Thr	missense_variant	3/5		NP_001185744.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MUC22	ENST00000561890.1	c.743T>C	p.Ile248Thr	missense_variant	2/4	2	NM_001395414.1	ENSP00000455906	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000146 AC: 2 AN: 1371952 Hom.: 0 Cov.: 89 AF XY: 0.00000148 AC XY: 1 AN XY: 677178

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000187

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

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

Mar 14, 2023

The c.743T>C (p.I248T) alteration is located in exon 3 (coding exon 2) of the MUC22 gene. This alteration results from a T to C substitution at nucleotide position 743, causing the isoleucine (I) at amino acid position 248 to be replaced by a threonine (T). 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	0.13
BayesDel_addAF	Benign	-0.41	T
BayesDel_noAF	Benign	-0.82
CADD	Benign	0.088
DANN	Benign	0.40
DEOGEN2	Benign	0.0049	T
FATHMM_MKL	Benign	0.00088	N
LIST_S2	Benign	0.41	T
M_CAP	Benign	0.023	T
MetaRNN	Benign	0.076	T
MutationAssessor	Benign	0.0	N
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.26	T
PROVEAN	Benign	-0.37	N
Sift	Benign	0.25	T
Sift4G	Benign	0.96	T
Vest4		0.016
MVP		0.17
GERP RS		-1.2
Varity_R		0.032
gMVP		0.0063

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr6-30993951;