Genetic Variant ITM2C:p.Pro28Leu (chr2-230865108-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_030926.6(ITM2C):c.83C>T(p.Pro28Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000915 in 1,507,836 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000053 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000096 ( 0 hom. )

Consequence

ITM2C
NM_030926.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.13

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.05781573).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ITM2C	NM_030926.6 link	c.83C>T	p.Pro28Leu	missense_variant	Exon 1 of 6	ENST00000326427.11	NP_112188.1	Q9NQX7-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ITM2C	ENST00000326427.11 link	c.83C>T	p.Pro28Leu	missense_variant	Exon 1 of 6	1	NM_030926.6	ENSP00000322730.6		Q9NQX7-1

Frequencies

GnomAD3 genomes

AF:

0.0000529

AC:

AN:

151146

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000487

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000886

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000106

AC:

AN:

132226

Hom.:

AF XY:

0.0000816

AC XY:

AN XY:

73548

show subpopulations

Gnomad AFR exome

AF:

0.000235

Gnomad AMR exome

AF:

0.0000449

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000494

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000209

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000958

AC:

130

AN:

1356690

Hom.:

Cov.:

AF XY:

0.0000808

AC XY:

AN XY:

668458

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000292

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000648

Gnomad4 NFE exome

AF:

0.000117

Gnomad4 OTH exome

AF:

0.0000540

GnomAD4 genome

AF:

0.0000529

AC:

AN:

151146

Hom.:

Cov.:

AF XY:

0.0000542

AC XY:

AN XY:

73762

show subpopulations

Gnomad4 AFR

AF:

0.0000487

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000886

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000165

Hom.:

Bravo

AF:

0.0000680

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000123

AC:

ExAC

AF:

0.000104

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jul 12, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.83C>T (p.P28L) alteration is located in exon 1 (coding exon 1) of the ITM2C gene. This alteration results from a C to T substitution at nucleotide position 83, causing the proline (P) at amino acid position 28 to be replaced by a leucine (L). 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

0.10

BayesDel_addAF

Benign

-0.19

BayesDel_noAF

Benign

-0.51

CADD

Benign

DANN

Benign

0.77

DEOGEN2

Benign

0.020

T;T;.;.

Eigen

Benign

-0.84

Eigen_PC

Benign

-0.90

FATHMM_MKL

Benign

0.066

LIST_S2

Benign

0.82

T;T;T;T

M_CAP

Uncertain

0.11

MetaRNN

Benign

0.058

T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.4

.;L;L;L

PrimateAI

Uncertain

0.59

PROVEAN

Benign

-1.1

N;N;N;N

REVEL

Benign

0.013

Sift

Benign

0.065

T;T;D;T

Sift4G

Uncertain

0.0090

D;T;T;T

Polyphen

0.12, 0.0, 0.64

.;B;B;P

Vest4

0.084, 0.16, 0.18

MVP

0.49

MPC

0.25

ClinPred

0.032

GERP RS

1.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.058

gMVP

0.37

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