2-203936838-C-G

Variant names:

• chr2-203936838-C-G
• rs1689659550
• NM_012092.4:c.24C>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_012092.4(ICOS):​c.24C>G​(p.Phe8Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ICOS NM_012092.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.0350
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• common variable immunodeficiency

  Inheritance: AD, AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• immunodeficiency, common variable, 1

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)

ENSG00000300710 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.12096393).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ICOS	NM_012092.4	c.24C>G	p.Phe8Leu	missense_variant	Exon 1 of 5	ENST00000316386.11	NP_036224.1
ICOS	XR_007073112.1	n.76C>G		non_coding_transcript_exon_variant	Exon 1 of 6
LOC101927840	XR_427213.4	n.314+479G>C		intron_variant	Intron 2 of 3
ICOS	XM_047444022.1	c.-3597C>G		upstream_gene_variant			XP_047299978.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ICOS	ENST00000316386.11	c.24C>G	p.Phe8Leu	missense_variant	Exon 1 of 5	1	NM_012092.4	ENSP00000319476.6
ICOS	ENST00000435193.1	c.24C>G	p.Phe8Leu	missense_variant	Exon 1 of 4	1		ENSP00000415951.1
ENSG00000300710	ENST00000773540.1	n.183+479G>C		intron_variant	Intron 2 of 3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.26
BayesDel_addAF	Benign	-0.17	T
BayesDel_noAF	Benign	-0.48
CADD	Benign	15
DANN	Benign	0.92
DEOGEN2	Benign	0.40	T;.
Eigen	Benign	-0.42
Eigen_PC	Benign	-0.36
FATHMM_MKL	Benign	0.58	D
LIST_S2	Benign	0.49	T;T
M_CAP	Benign	0.0093	T
MetaRNN	Benign	0.12	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.90	L;L
PhyloP100		-0.035
PrimateAI	Benign	0.38	T
PROVEAN	Benign	-1.3	N;N
REVEL	Benign	0.023
Sift	Benign	0.17	T;T
Sift4G	Pathogenic	0.0	D;D
Polyphen		0.19	B;P
Vest4		0.20
MutPred		0.35		Loss of MoRF binding (P = 0.1099);Loss of MoRF binding (P = 0.1099);
MVP		0.31
MPC		0.40
ClinPred		0.13	T
GERP RS		2.3
PromoterAI		-0.013	Neutral
Varity_R		0.074
gMVP		0.83
Mutation Taster		=93/7	polymorphism

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

Other links and lift over

dbSNP: rs1689659550; hg19: chr2-204801561;