2-203955761-CTC-TTA

Variant names:

• chr2-203955761-CTC-TTA
• NM_012092.4:c.184_186delCTCinsTTA
• ICOS p.63

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 0P and 1B. BP7

The NM_012092.4(ICOS):​c.184_186delCTCinsTTA​(p.63) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. It is difficult to determine the true allele frequency of this variant because it is of type MNV, and the frequency of such variant types in population databases may be underestimated and unreliable. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. L62L) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ICOS NM_012092.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.43
• 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: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• BP7: Synonymous conserved (PhyloP=2.43 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_012092.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ICOS	NM_012092.4	MANE Select	c.184_186delCTCinsTTA	p.63	synonymous	N/A	NP_036224.1	Q53QY6

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ICOS	ENST00000316386.11	TSL:1 MANE Select	c.184_186delCTCinsTTA	p.63	synonymous	N/A	ENSP00000319476.6	Q9Y6W8-1
	ICOS	ENST00000435193.1	TSL:1	c.184_186delCTCinsTTA	p.63	synonymous	N/A	ENSP00000415951.1	Q9Y6W8-2
	ICOS	ENST00000897354.1		c.59-898_59-896delCTCinsTTA		intron	N/A	ENSP00000567413.1

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		2.4

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr2-204820484;