Genetic Variant ITLN1:p.Trp200Arg (chr1-160880675-A-G) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_017625.3(ITLN1):c.598T>C(p.Trp200Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000446 in 1,614,048 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000047 ( 1 hom. )

Consequence

ITLN1
NM_017625.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -1.07

Publications

0 publications found

Variant links:

Genes affected

ITLN1 (HGNC:18259): (intelectin 1) Enables calcium ion binding activity; identical protein binding activity; and oligosaccharide binding activity. Involved in positive regulation of glucose import; positive regulation of protein phosphorylation; and protein homotrimerization. Located in extracellular exosome. Part of receptor complex. [provided by Alliance of Genome Resources, Apr 2022]

ITLN1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.03627926).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ITLN1	NM_017625.3 link	c.598T>C	p.Trp200Arg	missense_variant	Exon 6 of 8	ENST00000326245.4	NP_060095.2	Q8WWA0

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ITLN1	ENST00000326245.4 link	c.598T>C	p.Trp200Arg	missense_variant	Exon 6 of 8	1	NM_017625.3	ENSP00000323587.3		Q8WWA0
ITLN1	ENST00000487531.1 link	n.402T>C		non_coding_transcript_exon_variant	Exon 2 of 3	5

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152200

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000795

AC:

AN:

251448

AF XY:

0.0000736

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000868

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000149

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000465

AC:

AN:

1461848

Hom.:

Cov.:

AF XY:

0.0000440

AC XY:

AN XY:

727230

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33478

American (AMR)

AF:

0.0000447

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.0000383

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.0000936

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.000173

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000477

AC:

AN:

1111970

Other (OTH)

AF:

0.0000993

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.470

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152200

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74352

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41444

American (AMR)

AF:

0.000196

AC:

AN:

15270

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5202

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10626

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68042

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.488

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000329

Hom.:

Bravo

AF:

0.0000227

ExAC

AF:

0.000132

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Nov 15, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.598T>C (p.W200R) alteration is located in exon 6 (coding exon 5) of the ITLN1 gene. This alteration results from a T to C substitution at nucleotide position 598, causing the tryptophan (W) at amino acid position 200 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

0.16

BayesDel_addAF

Benign

-0.43

BayesDel_noAF

Benign

-0.60

CADD

Benign

0.17

(source)

DANN

Benign

0.26

DEOGEN2

Benign

0.13

Eigen

Benign

-2.0

Eigen_PC

Benign

-2.1

FATHMM_MKL

Benign

0.0083

LIST_S2

Benign

0.44

M_CAP

Benign

0.0015

MetaRNN

Benign

0.036

MetaSVM

Benign

-0.97

MutationAssessor

Pathogenic

3.0

PhyloP100

-1.1

PrimateAI

Benign

0.30

PROVEAN

Benign

-0.44

REVEL

Benign

0.053

Sift

Benign

0.53

Sift4G

Benign

0.53

Polyphen

0.0

Vest4

0.15

MutPred

0.38

Gain of disorder (P = 0.0113);

MVP

0.16

MPC

0.29

ClinPred

0.070

GERP RS

-5.7

Varity_R

0.12

gMVP

0.56

Mutation Taster

=94/6

polymorphism

(source)

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

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chr1-160880675-A-G

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over