Genetic Variant ITM2C:p.Asn223Tyr (chr2-230877505-A-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_030926.6(ITM2C):c.667A>T(p.Asn223Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000479 in 1,461,716 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/21 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: 0.0000048 ( 1 hom. )

Consequence

ITM2C
NM_030926.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.45

Variant links:

Genes affected

ITM2C (HGNC:6175): (integral membrane protein 2C) Enables amyloid-beta binding activity. Involved in negative regulation of neuron projection development and neuron differentiation. Located in several cellular components, including Golgi apparatus; lysosome; and perinuclear region of cytoplasm. [provided by Alliance of Genome Resources, Apr 2022]

ITM2C links:

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ACMG classification

Classification made for transcript

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=0.09677541).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ITM2C	NM_030926.6 link	c.667A>T	p.Asn223Tyr	missense_variant	Exon 5 of 6	ENST00000326427.11	NP_112188.1	Q9NQX7-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
ITM2C	ENST00000326427.11 link	c.667A>T	p.Asn223Tyr	missense_variant	Exon 5 of 6	1	NM_030926.6	ENSP00000322730.6	Q9NQX7-1
ITM2C	ENST00000326407.10 link	c.556A>T	p.Asn186Tyr	missense_variant	Exon 4 of 5	1		ENSP00000322100.6	Q9NQX7-3
ITM2C	ENST00000335005.10 link	c.526A>T	p.Asn176Tyr	missense_variant	Exon 4 of 5	1		ENSP00000335121.6	Q9NQX7-2
ITM2C	ENST00000409704.6 link	c.481A>T	p.Asn161Tyr	missense_variant	Exon 5 of 6	5		ENSP00000387242.2	B8ZZM6

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000119

AC:

AN:

251342

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135878

show subpopulations

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:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000479

AC:

AN:

1461716

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

727174

show subpopulations

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:

0.00000629

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ExAC

AF:

0.0000412

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Nov 21, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.667A>T (p.N223Y) alteration is located in exon 5 (coding exon 5) of the ITM2C gene. This alteration results from a A to T substitution at nucleotide position 667, causing the asparagine (N) at amino acid position 223 to be replaced by a tyrosine (Y). 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

0.12

BayesDel_addAF

Benign

-0.12

BayesDel_noAF

Benign

-0.34

CADD

Benign

DANN

Benign

0.61

DEOGEN2

Benign

0.054

T;.;.;.

Eigen

Benign

-0.66

Eigen_PC

Benign

-0.44

FATHMM_MKL

Uncertain

0.78

LIST_S2

Benign

0.72

T;T;T;T

M_CAP

Benign

0.024

MetaRNN

Benign

0.097

T;T;T;T

MetaSVM

Benign

-0.91

MutationAssessor

Benign

0.32

N;.;.;.

PrimateAI

Benign

0.36

PROVEAN

Benign

-1.1

N;N;N;N

REVEL

Benign

0.15

Sift

Benign

1.0

T;T;T;T

Sift4G

Benign

0.72

T;T;T;T

Polyphen

0.0020

B;B;B;.

Vest4

0.31

MutPred

0.36

Loss of ubiquitination at K225 (P = 0.0661);.;.;.;

MVP

0.76

MPC

0.29

ClinPred

0.048

GERP RS

2.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.064

gMVP

0.57

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over