2-210556736-G-T

Position:

• chr2-210556736-G-T

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_001875.5(CPS1):​c.3G>T​(p.Met1?) variant causes a start lost change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CPS1 NM_001875.5 start_lost
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 5.92

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]

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PVS1: Start lost variant, no new inframe start found.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 2-210556736-G-T is Pathogenic according to our data. Variant chr2-210556736-G-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 554067.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CPS1	NM_001875.5	c.3G>T	p.Met1?	start_lost	1/38	ENST00000233072.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CPS1	ENST00000233072.10	c.3G>T	p.Met1?	start_lost	1/38	1	NM_001875.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Congenital hyperammonemia, type I Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Counsyl

Sep 26, 2017

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.51
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.027	T;T;T;.;T;T
Eigen	Uncertain	0.53
Eigen_PC	Uncertain	0.61
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Uncertain	0.90	.;D;T;T;D;D
M_CAP	Pathogenic	0.70	D
MetaRNN	Pathogenic	0.99	D;D;D;D;D;D
MetaSVM	Pathogenic	1.1	D
MutationTaster	Benign	1.0	D;D
PROVEAN	Benign	-0.68	N;N;N;N;N;.
REVEL	Pathogenic	0.75
Sift	Pathogenic	0.0	D;D;D;D;D;.
Sift4G	Pathogenic	0.0	D;D;D;D;D;D
Polyphen		0.85	.;.;.;.;P;.
Vest4		0.69, 0.85, 0.88
MutPred		0.98		Gain of catalytic residue at M1 (P = 0.0626);Gain of catalytic residue at M1 (P = 0.0626);.;.;Gain of catalytic residue at M1 (P = 0.0626);Gain of catalytic residue at M1 (P = 0.0626);
MVP		0.95
MPC		0.86
ClinPred		0.99	D
GERP RS		5.8
Varity_R		0.80
gMVP		0.85

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

LitVar

Other links and lift over

dbSNP: rs1553507155; hg19: chr2-211421460;