5-141122123-C-A

Variant summary

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

The NM_018938.4(PCDHB4):c.125C>A(p.Ser42Tyr) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: PCDHB4 NM_018938.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.96

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]

(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/exons	MANE	UniProt
PCDHB4	NM_018938.4	c.125C>A	p.Ser42Tyr	missense_variant	1/1	ENST00000194152.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PCDHB4	ENST00000194152.4	c.125C>A	p.Ser42Tyr	missense_variant	1/1		NM_018938.4	P1
	ENST00000624802.1	n.365-21368G>T		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 22, 2023

The c.125C>A (p.S42Y) alteration is located in exon 1 (coding exon 1) of the PCDHB4 gene. This alteration results from a C to A substitution at nucleotide position 125, causing the serine (S) at amino acid position 42 to be replaced by a tyrosine (Y). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.059	T
BayesDel_noAF	Benign	-0.32
Cadd	Benign	19
Dann	Benign	0.96
DEOGEN2	Benign	0.024	T
Eigen	Benign	0.039
Eigen_PC	Benign	0.098
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Benign	0.76	T
M_CAP	Benign	0.019	T
MetaRNN	Uncertain	0.48	T
MetaSVM	Benign	-0.82	T
MutationAssessor	Uncertain	2.5	M
MutationTaster	Benign	1.0	D
PrimateAI	Benign	0.37	T
PROVEAN	Uncertain	-3.4	D
REVEL	Benign	0.26
Sift	Benign	0.17	T
Sift4G	Benign	0.084	T
Polyphen		0.019	B
Vest4		0.50
MutPred		0.78		Loss of disorder (P = 0.0153);
MVP		0.37
ClinPred		0.60	D
GERP RS		4.7
Varity_R		0.48
gMVP		0.89

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: chr5-140501705;