2-203726685-G-C

Variant names:

• chr2-203726685-G-C
• NM_006139.4:c.105G>C
• CD28 p.Ala35Ala

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_006139.4(CD28):​c.105G>C​(p.Ala35Ala) variant causes a synonymous 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. A35A) has been classified as Benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CD28 NM_006139.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.24
• Publications: 0 publications found

Genes affected

CD28 (HGNC:1653): (CD28 molecule) The protein encoded by this gene is essential for T-cell proliferation and survival, cytokine production, and T-helper type-2 development. Several alternatively spliced transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Jul 2011]

CD28 Gene-Disease associations (from GenCC):

• immunodeficiency 123 with HPV-related verrucosis

  Inheritance: AR Classification: MODERATE, LIMITED Submitted by: ClinGen, Ambry Genetics

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.87).
• BP7: Synonymous conserved (PhyloP=-1.24 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006139.4. 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
	CD28	NM_006139.4	MANE Select	c.105G>C	p.Ala35Ala	synonymous	Exon 2 of 4	NP_006130.1	P10747-1
	CD28	NM_001410981.1		c.147G>C	p.Ala49Ala	synonymous	Exon 2 of 4	NP_001397910.1	P10747-7
	CD28	NM_001243077.2		c.105G>C	p.Ala35Ala	synonymous	Exon 2 of 4	NP_001230006.1	P10747-4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CD28	ENST00000324106.9	TSL:1 MANE Select	c.105G>C	p.Ala35Ala	synonymous	Exon 2 of 4	ENSP00000324890.7	P10747-1
	CD28	ENST00000458610.6	TSL:1	c.147G>C	p.Ala49Ala	synonymous	Exon 2 of 4	ENSP00000393648.2	P10747-7
	CD28	ENST00000374481.8	TSL:1	c.53-2963G>C		intron	N/A	ENSP00000363605.4	P10747-2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.87
CADD	Benign	0.24
DANN	Benign	0.29
PhyloP100		-1.2
Mutation Taster		=100/0	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

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

Other links and lift over

hg19: chr2-204591408;