2-27217578-G-T

Position:

• chr2-27217578-G-T

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 2P and 7B. PM2 BP4_Strong BP6_Moderate BP7

The ENST00000264705.9(CAD):​c.27G>T​(p.Gly9=) 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. Variant has been reported in ClinVar as Likely benign (★). Synonymous variant affecting the same amino acid position (i.e. G9G) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CAD ENST00000264705.9 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 1.88

Genes affected

CAD (HGNC:1424): (carbamoyl-phosphate synthetase 2, aspartate transcarbamylase, and dihydroorotase) The de novo synthesis of pyrimidine nucleotides is required for mammalian cells to proliferate. This gene encodes a trifunctional protein which is associated with the enzymatic activities of the first 3 enzymes in the 6-step pathway of pyrimidine biosynthesis: carbamoylphosphate synthetase (CPS II), aspartate transcarbamoylase, and dihydroorotase. This protein is regulated by the mitogen-activated protein kinase (MAPK) cascade, which indicates a direct link between activation of the MAPK cascade and de novo biosynthesis of pyrimidine nucleotides. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Apr 2015]

ACMG classification

Verdict is Likely_benign. Variant got -5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.56).
• BP6: Variant 2-27217578-G-T is Benign according to our data. Variant chr2-27217578-G-T is described in ClinVar as [Likely_benign]. Clinvar id is 2879609.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=1.88 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CAD	NM_004341.5	c.27G>T	p.Gly9=	synonymous_variant	1/44	ENST00000264705.9	NP_004332.2
CAD	NM_001306079.2	c.27G>T	p.Gly9=	synonymous_variant	1/43		NP_001293008.1
CAD	XM_047445803.1	c.27G>T	p.Gly9=	synonymous_variant	1/45		XP_047301759.1
CAD	XM_006712101.4	c.27G>T	p.Gly9=	synonymous_variant	1/44		XP_006712164.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CAD	ENST00000264705.9	c.27G>T	p.Gly9=	synonymous_variant	1/44	1	NM_004341.5	ENSP00000264705	P1
CAD	ENST00000403525.5	c.27G>T	p.Gly9=	synonymous_variant	1/43	1		ENSP00000384510

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jun 05, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.56
CADD	Benign	13
DANN	Benign	0.93

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: rs1674926180; hg19: chr2-27440446;