Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_001875.5(CPS1):c.3481-8C>T variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00589 in 1,612,698 control chromosomes in the GnomAD database, including 36 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0041 ( 3 hom., cov: 32)

Exomes 𝑓: 0.0061 ( 33 hom. )

Consequence

CPS1
NM_001875.5 splice_region, intron

Scores

Splicing: ADA: 0.00001910

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:8

Conservation

PhyloP100: -0.826

Publications

4 publications found

Variant links:

Genes affected

CPS1 (HGNC:2323): (carbamoyl-phosphate synthase 1) The mitochondrial enzyme encoded by this gene catalyzes synthesis of carbamoyl phosphate from ammonia and bicarbonate. This reaction is the first committed step of the urea cycle, which is important in the removal of excess urea from cells. The encoded protein may also represent a core mitochondrial nucleoid protein. Three transcript variants encoding different isoforms have been found for this gene. The shortest isoform may not be localized to the mitochondrion. Mutations in this gene have been associated with carbamoyl phosphate synthetase deficiency, susceptibility to persistent pulmonary hypertension, and susceptibility to venoocclusive disease after bone marrow transplantation.[provided by RefSeq, May 2010]

CPS1 Gene-Disease associations (from GenCC):

carbamoyl phosphate synthetase I deficiency disease
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, Labcorp Genetics (formerly Invitae), ClinGen, Myriad Women’s Health

CPS1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.8).

BP6

Variant 2-210654017-C-T is Benign according to our data. Variant chr2-210654017-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 258480.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.00408 (622/152290) while in subpopulation NFE AF = 0.00706 (480/68028). AF 95% confidence interval is 0.00653. There are 3 homozygotes in GnomAd4. There are 308 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 3 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001875.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
CPS1	NM_001875.5	MANE Select	c.3481-8C>T	splice_region intron	N/A	NP_001866.2
CPS1	NM_001369256.1		c.3514-8C>T	splice_region intron	N/A	NP_001356185.1
CPS1	NM_001122633.3		c.3481-8C>T	splice_region intron	N/A	NP_001116105.2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
CPS1	ENST00000233072.10	TSL:1 MANE Select	c.3481-8C>T	splice_region intron	N/A	ENSP00000233072.5
CPS1	ENST00000430249.7	TSL:1	c.3499-8C>T	splice_region intron	N/A	ENSP00000402608.2
CPS1	ENST00000451903.3	TSL:1	c.2128-8C>T	splice_region intron	N/A	ENSP00000406136.2

Frequencies

GnomAD3 genomes

AF:

0.00409

AC:

622

AN:

152172

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00104

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00209

Gnomad ASJ

AF:

0.00202

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00187

Gnomad FIN

AF:

0.00415

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00706

Gnomad OTH

AF:

0.00335

GnomAD2 exomes

AF:

0.00463

AC:

1164

AN:

251450

AF XY:

0.00449

show subpopulations

Gnomad AFR exome

AF:

0.00166

Gnomad AMR exome

AF:

0.00150

Gnomad ASJ exome

AF:

0.00228

Gnomad EAS exome

AF:

0.000435

Gnomad FIN exome

AF:

0.00309

Gnomad NFE exome

AF:

0.00804

Gnomad OTH exome

AF:

0.00489

GnomAD4 exome

AF:

0.00608

AC:

8877

AN:

1460408

Hom.:

Cov.:

AF XY:

0.00598

AC XY:

4349

AN XY:

726674

show subpopulations

African (AFR)

AF:

0.00123

AC:

AN:

33440

American (AMR)

AF:

0.00168

AC:

AN:

44712

Ashkenazi Jewish (ASJ)

AF:

0.00260

AC:

AN:

26118

East Asian (EAS)

AF:

0.000151

AC:

AN:

39690

South Asian (SAS)

AF:

0.00129

AC:

111

AN:

86240

European-Finnish (FIN)

AF:

0.00429

AC:

229

AN:

53414

Middle Eastern (MID)

AF:

0.00104

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00728

AC:

8088

AN:

1110684

Other (OTH)

AF:

0.00419

AC:

253

AN:

60344

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.457

Heterozygous variant carriers

386

772

1158

1544

1930

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

298

596

894

1192

1490

<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:

0.00408

AC:

622

AN:

152290

Hom.:

Cov.:

AF XY:

0.00414

AC XY:

308

AN XY:

74474

show subpopulations

African (AFR)

AF:

0.00103

AC:

AN:

41558

American (AMR)

AF:

0.00209

AC:

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.00202

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5184

South Asian (SAS)

AF:

0.00187

AC:

AN:

4820

European-Finnish (FIN)

AF:

0.00415

AC:

AN:

10608

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00706

AC:

480

AN:

68028

Other (OTH)

AF:

0.00331

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.513

Heterozygous variant carriers

126

158

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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

Alfa

AF:

0.00529

Hom.:

Bravo

AF:

0.00360

Asia WGS

AF:

0.00144

AC:

AN:

3478

ClinVar

ClinVar submissions as Germline

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

Congenital hyperammonemia, type I (3)

not provided (3)

not specified (2)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.80

CADD

Benign

0.24

(source)

DANN

Benign

0.76

PhyloP100

-0.83

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.000019

dbscSNV1_RF

Benign

0.014

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.

rs41272669

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

ClinVar submissions as Germline

Computational scores

Splicing

Publications

Other links and lift over