chr5-141122761-C-A

Variant names:

• chr5-141122761-C-A
• rs3733698
• NM_018938.4:c.763C>A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_018938.4(PCDHB4):​c.763C>A​(p.Pro255Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 13/20 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P255L) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PCDHB4 NM_018938.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.705

Genes affected

PCDHB4 (HGNC:8689): (protocadherin beta 4) This gene is a member of the protocadherin beta gene cluster, one of three related gene clusters tandemly linked on chromosome five. The gene clusters demonstrate an unusual genomic organization similar to that of B-cell and T-cell receptor gene clusters. The beta cluster contains 16 genes and 3 pseudogenes, each encoding 6 extracellular cadherin domains and a cytoplasmic tail that deviates from others in the cadherin superfamily. The extracellular domains interact in a homophilic manner to specify differential cell-cell connections. Unlike the alpha and gamma clusters, the transcripts from these genes are made up of only one large exon, not sharing common 3' exons as expected. These neural cadherin-like cell adhesion proteins are integral plasma membrane proteins. Their specific functions are unknown but they most likely play a critical role in the establishment and function of specific cell-cell neural connections. [provided by RefSeq, Jul 2008]

PCDHB@ (HGNC:8679):

ENSG00000272154 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PCDHB4	NM_018938.4	c.763C>A	p.Pro255Thr	missense_variant	Exon 1 of 1	ENST00000194152.4	NP_061761.1
PCDHB@		n.141122761C>A		intragenic_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PCDHB4	ENST00000194152.4	c.763C>A	p.Pro255Thr	missense_variant	Exon 1 of 1	6	NM_018938.4	ENSP00000194152.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 36

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.075
BayesDel_addAF	Benign	-0.072	T
BayesDel_noAF	Benign	-0.34
CADD	Benign	15
DANN	Uncertain	0.99
DEOGEN2	Benign	0.047	T
Eigen	Benign	-0.0051
Eigen_PC	Benign	-0.019
FATHMM_MKL	Uncertain	0.80	D
LIST_S2	Benign	0.21	T
M_CAP	Benign	0.044	D
MetaRNN	Uncertain	0.45	T
MetaSVM	Benign	-0.37	T
MutationAssessor	Benign	2.0	M
PrimateAI	Benign	0.33	T
PROVEAN	Pathogenic	-6.1	D
REVEL	Benign	0.17
Sift	Uncertain	0.014	D
Sift4G	Uncertain	0.010	D
Polyphen		0.27	B
Vest4		0.11
MutPred		0.39		Gain of catalytic residue at P255 (P = 0.0543);
MVP		0.50
ClinPred		0.87	D
GERP RS		3.5
Varity_R		0.45
gMVP		0.21

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: rs3733698; hg19: chr5-140502343;