NM_018915.4:c.1024G>T

Variant names:

• chr5-141339995-G-T
• NM_018915.4:c.1024G>T

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_018915.4(PCDHGA2):​c.1024G>T​(p.Asp342Tyr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 33)
• Consequence: PCDHGA2 NM_018915.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 8.15

Genes affected

PCDHGA2 (HGNC:8700): (protocadherin gamma subfamily A, 2) This gene is a member of the protocadherin gamma gene cluster, one of three related clusters tandemly linked on chromosome five. These gene clusters have an immunoglobulin-like organization, suggesting that a novel mechanism may be involved in their regulation and expression. The gamma gene cluster includes 22 genes divided into 3 subfamilies. Subfamily A contains 12 genes, subfamily B contains 7 genes and 2 pseudogenes, and the more distantly related subfamily C contains 3 genes. The tandem array of 22 large, variable region exons are followed by a constant region, containing 3 exons shared by all genes in the cluster. Each variable region exon encodes the extracellular region, which includes 6 cadherin ectodomains and a transmembrane region. The constant region exons encode the common cytoplasmic region. These neural cadherin-like cell adhesion proteins most likely play a critical role in the establishment and function of specific cell-cell connections in the brain. Alternative splicing has been described for the gamma cluster genes. [provided by RefSeq, Jul 2008]

PCDHGA1 (HGNC:8696): (protocadherin gamma subfamily A, 1) This gene is a member of the protocadherin gamma gene cluster, one of three related clusters tandemly linked on chromosome five. These gene clusters have an immunoglobulin-like organization, suggesting that a novel mechanism may be involved in their regulation and expression. The gamma gene cluster includes 22 genes divided into 3 subfamilies. Subfamily A contains 12 genes, subfamily B contains 7 genes and 2 pseudogenes, and the more distantly related subfamily C contains 3 genes. The tandem array of 22 large, variable region exons are followed by a constant region, containing 3 exons shared by all genes in the cluster. Each variable region exon encodes the extracellular region, which includes 6 cadherin ectodomains and a transmembrane region. The constant region exons encode the common cytoplasmic region. These neural cadherin-like cell adhesion proteins most likely play a critical role in the establishment and function of specific cell-cell connections in the brain. Alternative splicing has been described for the gamma cluster genes. [provided by RefSeq, Jul 2008]

PCDHG@ (HGNC:8695):

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.97

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PCDHGA2	NM_018915.4	c.1024G>T	p.Asp342Tyr	missense_variant	Exon 1 of 4	ENST00000394576.3	NP_061738.1
PCDHGA1	NM_018912.3	c.2421+6890G>T		intron_variant	Intron 1 of 3	ENST00000517417.3	NP_061735.1
PCDHGA2	NM_032009.3	c.1024G>T	p.Asp342Tyr	missense_variant	Exon 1 of 1		NP_114398.1
PCDHG@		n.141339995G>T		intragenic_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PCDHGA2	ENST00000394576.3	c.1024G>T	p.Asp342Tyr	missense_variant	Exon 1 of 4	1	NM_018915.4	ENSP00000378077.2
PCDHGA1	ENST00000517417.3	c.2421+6890G>T		intron_variant	Intron 1 of 3	1	NM_018912.3	ENSP00000431083.1
PCDHGA2	ENST00000528330.2	c.1024G>T	p.Asp342Tyr	missense_variant	Exon 1 of 1	6		ENSP00000483020.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.94
BayesDel_addAF	Pathogenic	0.41	D
BayesDel_noAF	Pathogenic	0.36
CADD	Pathogenic	29
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.45	.;T
Eigen	Pathogenic	1.0
Eigen_PC	Pathogenic	0.86
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Pathogenic	0.99	D;D
M_CAP	Benign	0.028	D
MetaRNN	Pathogenic	0.97	D;D
MetaSVM	Pathogenic	0.98	D
MutationAssessor	Pathogenic	4.5	H;H
PROVEAN	Pathogenic	-8.7	.;D
REVEL	Pathogenic	0.70
Sift	Pathogenic	0.0	.;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;D
Vest4		0.91
MutPred		0.82		Gain of phosphorylation at D342 (P = 0.0412);Gain of phosphorylation at D342 (P = 0.0412);
MVP		0.94
MPC		1.2
ClinPred		1.0	D
GERP RS		5.3
Varity_R		0.85
gMVP		0.61

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr5-140719562;