chr2-203956665-A-C

Position:

chr2-203956665-A-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BS1_Supporting

The NM_012092.4(ICOS):c.401A>C(p.Gln134Pro) variant causes a missense change. The variant allele was found at a frequency of 0.0000335 in 1,612,604 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000030 ( 0 hom. )

Consequence

ICOS
NM_012092.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 4.01

Variant links:

Genes affected

ICOS (HGNC:5351): (inducible T cell costimulator) The protein encoded by this gene belongs to the CD28 and CTLA-4 cell-surface receptor family. It forms homodimers and plays an important role in cell-cell signaling, immune responses, and regulation of cell proliferation. [provided by RefSeq, Jul 2008]

ICOS links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BS1

Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.0000657 (10/152174) while in subpopulation AMR AF= 0.000393 (6/15276). AF 95% confidence interval is 0.00017. There are 0 homozygotes in gnomad4. There are 7 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
ICOS	NM_012092.4 linkuse as main transcript	c.401A>C	p.Gln134Pro	missense_variant	3/5	ENST00000316386.11	NP_036224.1
ICOS	XM_047444022.1 linkuse as main transcript	c.404A>C	p.Gln135Pro	missense_variant	3/5		XP_047299978.1
ICOS	XR_007073112.1 linkuse as main transcript	n.453A>C		non_coding_transcript_exon_variant	3/6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ICOS	ENST00000316386.11 linkuse as main transcript	c.401A>C	p.Gln134Pro	missense_variant	3/5	1	NM_012092.4	ENSP00000319476	P2	Q9Y6W8-1
ICOS	ENST00000435193.1 linkuse as main transcript	c.401A>C	p.Gln134Pro	missense_variant	3/4	1		ENSP00000415951	A2	Q9Y6W8-2

Frequencies

GnomAD3 genomes

AF:

0.0000657

AC:

AN:

152174

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000393

Gnomad ASJ

AF:

0.000865

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

GnomAD3 exomes

AF:

0.0000836

AC:

AN:

251198

Hom.:

AF XY:

0.0000663

AC XY:

AN XY:

135758

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000405

Gnomad ASJ exome

AF:

0.000397

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000881

Gnomad OTH exome

AF:

0.000327

GnomAD4 exome

AF:

0.0000301

AC:

AN:

1460430

Hom.:

Cov.:

AF XY:

0.0000303

AC XY:

AN XY:

726592

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000425

Gnomad4 ASJ exome

AF:

0.000421

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000720

Gnomad4 OTH exome

AF:

0.0000994

GnomAD4 genome

AF:

0.0000657

AC:

AN:

152174

Hom.:

Cov.:

AF XY:

0.0000942

AC XY:

AN XY:

74334

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.000393

Gnomad4 ASJ

AF:

0.000865

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000130

Hom.:

Bravo

AF:

0.0000982

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000412

AC:

EpiCase

AF:

0.0000546

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Immunodeficiency, common variable, 1

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Feb 20, 2022

This sequence change replaces glutamine, which is neutral and polar, with proline, which is neutral and non-polar, at codon 134 of the ICOS protein (p.Gln134Pro). This variant is present in population databases (rs367905290, gnomAD 0.06%). This variant has not been reported in the literature in individuals affected with ICOS-related conditions. ClinVar contains an entry for this variant (Variation ID: 538689). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C15"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 18, 2023

The c.401A>C (p.Q134P) alteration is located in exon 3 (coding exon 3) of the ICOS gene. This alteration results from a A to C substitution at nucleotide position 401, causing the glutamine (Q) at amino acid position 134 to be replaced by a proline (P). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

CeGaT Center for Human Genetics Tuebingen

Mar 01, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.077

BayesDel_noAF

Uncertain

-0.040

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.66

D;.

Eigen

Uncertain

0.42

Eigen_PC

Uncertain

0.39

FATHMM_MKL

Uncertain

0.90

LIST_S2

Benign

0.75

T;T

M_CAP

Benign

0.010

MetaRNN

Uncertain

0.61

D;D

MetaSVM

Benign

-0.78

MutationAssessor

Benign

2.0

M;M

MutationTaster

Benign

0.95

N;N

PrimateAI

Benign

0.36

PROVEAN

Uncertain

-3.8

D;D

REVEL

Benign

0.14

Sift

Uncertain

0.0090

D;D

Sift4G

Uncertain

0.013

D;D

Polyphen

0.95

P;P

Vest4

0.64

MVP

0.43

MPC

1.2

ClinPred

0.67

GERP RS

4.5

Varity_R

0.56

gMVP

0.66

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