1-22081740-G-A

Position:

• chr1-22081740-G-A

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PM1 PM2 PP5_Very_Strong

The NM_001791.4(CDC42):​c.124G>A​(p.Val42Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: CDC42 NM_001791.4 missense
• Clinical Significance: Likely pathogenic criteria provided, multiple submitters, no conflicts P:2
• Conservation: PhyloP100: 9.91

Genes affected

CDC42 (HGNC:1736): (cell division cycle 42) The protein encoded by this gene is a small GTPase of the Rho-subfamily, which regulates signaling pathways that control diverse cellular functions including cell morphology, migration, endocytosis and cell cycle progression. This protein is highly similar to Saccharomyces cerevisiae Cdc 42, and is able to complement the yeast cdc42-1 mutant. The product of oncogene Dbl was reported to specifically catalyze the dissociation of GDP from this protein. This protein could regulate actin polymerization through its direct binding to Neural Wiskott-Aldrich syndrome protein (N-WASP), which subsequently activates Arp2/3 complex. Alternative splicing of this gene results in multiple transcript variants. Pseudogenes of this gene have been identified on chromosomes 3, 4, 5, 7, 8 and 20. [provided by RefSeq, Apr 2013]

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PM1: In a chain Cell division control protein 42 homolog (size 187) in uniprot entity CDC42_HUMAN there are 34 pathogenic changes around while only 0 benign (100%) in NM_001791.4
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 1-22081740-G-A is Pathogenic according to our data. Variant chr1-22081740-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 372848.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CDC42	NM_001791.4	c.124G>A	p.Val42Ile	missense_variant	3/6	ENST00000656825.1
CDC42	NM_001039802.2	c.124G>A	p.Val42Ile	missense_variant	4/7
CDC42	NM_044472.3	c.124G>A	p.Val42Ile	missense_variant	3/6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CDC42	ENST00000656825.1	c.124G>A	p.Val42Ile	missense_variant	3/6		NM_001791.4	P3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 28

GnomAD4 genome Cov.: 33

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Pathogenic:2

Likely pathogenic, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Aug 01, 2020	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Feb 19, 2016	The V42I variant in the CDC42 gene has not been reported previously as a pathogenic variant, nor as a benign variant, to our knowledge. The V42I variant was not observed in approximately 6500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. The V42I variant is a conservative amino acid substitution, which is not likely to impact secondary protein structure as these residues share similar properties. This substitution occurs at a position that is conserved across species, and in silico analysis predicts this variant is probably damaging to the protein structure/function. We interpret V42I as a likely pathogenic variant. However, the possibility it may be a rare benign variant cannot be excluded. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.61
BayesDel_addAF	Uncertain	0.082	D
BayesDel_noAF	Benign	-0.12
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.36	.;T;T;.;T
Eigen	Pathogenic	0.79
Eigen_PC	Pathogenic	0.79
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.70	T;.;.;T;T
M_CAP	Benign	0.029	D
MetaRNN	Uncertain	0.63	D;D;D;D;D
MetaSVM	Uncertain	0.27	D
MutationAssessor	Benign	1.1	.;L;L;L;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.82	D
PROVEAN	Benign	-0.88	.;N;N;N;N
REVEL	Uncertain	0.47
Sift	Uncertain	0.0070	.;D;D;D;D
Sift4G	Uncertain	0.019	.;D;D;D;D
Polyphen		0.69, 1.0	.;P;P;D;.
Vest4		0.61, 0.60
MVP		0.81
MPC		1.8
ClinPred		0.97	D
GERP RS		5.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.7
Varity_R		0.80
gMVP		0.78

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: rs1057518022; hg19: chr1-22408233;