1-41001131-G-C

Variant names:

• chr1-41001131-G-C
• rs12718433
• NM_001905.4:c.1094+14G>C

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The ENST00000650070.2(CTPS1):​c.1094+14G>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000658 in 151,944 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: CTPS1 ENST00000650070.2 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -2.50
• Publications: 8 publications found

Genes affected

CTPS1 (HGNC:2519): (CTP synthase 1) This gene encodes an enzyme responsible for the catalytic conversion of UTP (uridine triphosphate) to CTP (cytidine triphospate). This reaction is an important step in the biosynthesis of phospholipids and nucleic acids. Activity of this proten is important in the immune system, and loss of function of this gene has been associated with immunodeficiency. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2014]

CTPS1 Gene-Disease associations (from GenCC):

• severe combined immunodeficiency due to CTPS1 deficiency

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.93).

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000650070.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CTPS1	NM_001905.4	MANE Select	c.1094+14G>C		intron	N/A	NP_001896.2
	CTPS1	NM_001301237.2		c.626+14G>C		intron	N/A	NP_001288166.1
	CTPS1	NR_125440.2		n.1241+14G>C		intron	N/A

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CTPS1	ENST00000650070.2	MANE Select	c.1094+14G>C		intron	N/A	ENSP00000497602.1
	CTPS1	ENST00000372616.1	TSL:2	c.1094+14G>C		intron	N/A	ENSP00000361699.1
	CTPS1	ENST00000470271.6	TSL:3	c.1094+14G>C		intron	N/A	ENSP00000497901.2

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 151944 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000242

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

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

GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0 AN: 1435424 Hom.: 0 Cov.: 27 AF XY: 0.00 AC XY: 0 AN XY: 714394

African (AFR) AF: 0.00 AC: 0 AN: 32104

American (AMR) AF: 0.00 AC: 0 AN: 37434

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25390

East Asian (EAS) AF: 0.00 AC: 0 AN: 39086

South Asian (SAS) AF: 0.00 AC: 0 AN: 81492

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53000

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5696

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1101784

Other (OTH) AF: 0.00 AC: 0 AN: 59438

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 151944 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74190

African (AFR) AF: 0.0000242 AC: 1 AN: 41364

American (AMR) AF: 0.00 AC: 0 AN: 15276

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5172

South Asian (SAS) AF: 0.00 AC: 0 AN: 4820

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10554

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 67972

Other (OTH) AF: 0.00 AC: 0 AN: 2086

Alfa AF: 0.00 Hom.: 1526

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.93
CADD	Benign	0.016
DANN	Benign	0.35
PhyloP100		-2.5

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: rs12718433; hg19: chr1-41466803;