Genetic Variant CTPS1:p.Tyr74Tyr (chr1-40984876-T-C) – ACMG Classification: Benign (-11 pts)

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 2P and 13B. PM2BP4_StrongBP6_Very_StrongBP7

The NM_001905.4(CTPS1):c.222T>C(p.Tyr74Tyr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000119 in 1,602,842 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000012 ( 0 hom. )

Consequence

CTPS1
NM_001905.4 synonymous

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: -0.465

Publications

0 publications found

Variant links:

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):

combined immunodeficiency due to CTPS1 deficiency
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, Orphanet

CTPS1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -11 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.61).

BP6

Variant 1-40984876-T-C is Benign according to our data. Variant chr1-40984876-T-C is described in ClinVar as Likely_benign. ClinVar VariationId is 1133843.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-0.465 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001905.4. 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
	CTPS1	NM_001905.4	MANE Select	c.222T>C	p.Tyr74Tyr	synonymous	Exon 3 of 19	NP_001896.2	P17812-1
	CTPS1	NR_125440.2		n.369T>C		non_coding_transcript_exon	Exon 3 of 18

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
CTPS1	ENST00000650070.2	MANE Select	c.222T>C	p.Tyr74Tyr	synonymous	Exon 3 of 19	ENSP00000497602.1	P17812-1
CTPS1	ENST00000372616.1	TSL:2	c.222T>C	p.Tyr74Tyr	synonymous	Exon 2 of 18	ENSP00000361699.1	P17812-1
CTPS1	ENST00000470271.6	TSL:3	c.222T>C	p.Tyr74Tyr	synonymous	Exon 3 of 19	ENSP00000497901.2	P17812-1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152212

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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

GnomAD2 exomes

AF:

0.0000162

AC:

AN:

247450

AF XY:

0.0000149

show subpopulations

Gnomad AFR exome

AF:

0.0000620

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000265

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000124

AC:

AN:

1450512

Hom.:

Cov.:

AF XY:

0.0000139

AC XY:

AN XY:

720502

show subpopulations

African (AFR)

AF:

0.0000901

AC:

AN:

33298

American (AMR)

AF:

0.00

AC:

AN:

43776

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25954

East Asian (EAS)

AF:

0.00

AC:

AN:

39352

South Asian (SAS)

AF:

0.00

AC:

AN:

84514

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53248

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5720

European-Non Finnish (NFE)

AF:

0.00000996

AC:

AN:

1104760

Other (OTH)

AF:

0.0000668

AC:

AN:

59890

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.483

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00000656

AC:

AN:

152330

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74498

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41572

American (AMR)

AF:

0.00

AC:

AN:

15306

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5182

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68032

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.00000756

ClinVar

ClinVar submissions

Significance:Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

Combined immunodeficiency due to CTPS1 deficiency (1)

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.61

CADD

Benign

6.3

(source)

DANN

Benign

0.32

PhyloP100

-0.47

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Mutation Taster

=92/8

polymorphism

(source)

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

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over