2-203866830-A-G

Variant names:

• chr2-203866830-A-G
• rs231772
• ENST00000696479.1:c.48-1088A>G

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The ENST00000696479.1(CTLA4):​c.48-1088A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.989 in 152,306 control chromosomes in the GnomAD database, including 74,458 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. The gene CTLA4 is included in the ClinGen Criteria Specification Registry.

• Frequency: Genomes: 𝑓 0.99 (74458 hom., cov: 31)
• Consequence: CTLA4 ENST00000696479.1 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.377
• Publications: 4 publications found

Genes affected

CTLA4 (HGNC:2505): (cytotoxic T-lymphocyte associated protein 4) This gene is a member of the immunoglobulin superfamily and encodes a protein which transmits an inhibitory signal to T cells. The protein contains a V domain, a transmembrane domain, and a cytoplasmic tail. Alternate transcriptional splice variants, encoding different isoforms, have been characterized. The membrane-bound isoform functions as a homodimer interconnected by a disulfide bond, while the soluble isoform functions as a monomer. Mutations in this gene have been associated with insulin-dependent diabetes mellitus, Graves disease, Hashimoto thyroiditis, celiac disease, systemic lupus erythematosus, thyroid-associated orbitopathy, and other autoimmune diseases. [provided by RefSeq, Jul 2008]

CTLA4 Gene-Disease associations (from GenCC):

• autoimmune lymphoproliferative syndrome due to CTLA4 haploinsufficiency

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, ClinGen, Labcorp Genetics (formerly Invitae), Ambry Genetics
• systemic lupus erythematosus

  Inheritance: Unknown Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Specifications for CTLA4 are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.93).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.994 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000696479.1. 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
There are no transcript annotations for this variant.

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CTLA4	ENST00000696479.1		c.48-1088A>G		intron	N/A	ENSP00000512655.1	A0A8Q3SIR7

Frequencies

GnomAD3 genomes AF: 0.989 AC: 150456 AN: 152188 Hom.: 74401 Cov.: 31

Gnomad AFR AF: 0.960

Gnomad AMI AF: 1.00

Gnomad AMR AF: 0.997

Gnomad ASJ AF: 1.00

Gnomad EAS AF: 1.00

Gnomad SAS AF: 1.00

Gnomad FIN AF: 1.00

Gnomad MID AF: 1.00

Gnomad NFE AF: 1.00

Gnomad OTH AF: 0.994

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

GnomAD4 genome AF: 0.989 AC: 150572 AN: 152306 Hom.: 74458 Cov.: 31 AF XY: 0.989 AC XY: 73642 AN XY: 74472

African (AFR) AF: 0.960 AC: 39887 AN: 41552

American (AMR) AF: 0.997 AC: 15258 AN: 15308

Ashkenazi Jewish (ASJ) AF: 1.00 AC: 3472 AN: 3472

East Asian (EAS) AF: 1.00 AC: 5170 AN: 5170

South Asian (SAS) AF: 1.00 AC: 4816 AN: 4818

European-Finnish (FIN) AF: 1.00 AC: 10628 AN: 10628

Middle Eastern (MID) AF: 1.00 AC: 294 AN: 294

European-Non Finnish (NFE) AF: 1.00 AC: 68033 AN: 68038

Other (OTH) AF: 0.994 AC: 2102 AN: 2114

Alfa AF: 0.990 Hom.: 11339

Bravo AF: 0.987

Asia WGS AF: 1.00 AC: 3477 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.93
CADD	Benign	2.0
DANN	Benign	0.55
PhyloP100		-0.38

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

dbSNP: rs231772;

hg19: chr2-204731553;