5-141209236-T-A

Variant names:

• chr5-141209236-T-A
• rs200930526
• NM_018932.4:c.329T>A

Variant summary

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

The NM_018932.4(PCDHB12):​c.329T>A​(p.Met110Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: PCDHB12 NM_018932.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.12

Genes affected

PCDHB12 (HGNC:8683): (protocadherin beta 12) 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):

ENSG00000280029 (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
PCDHB12	NM_018932.4	c.329T>A	p.Met110Lys	missense_variant	Exon 1 of 1	ENST00000239450.4	NP_061755.1
PCDHB@		n.141209236T>A		intragenic_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PCDHB12	ENST00000239450.4	c.329T>A	p.Met110Lys	missense_variant	Exon 1 of 1	6	NM_018932.4	ENSP00000239450.2
PCDHB12	ENST00000624949.1	c.-99+294T>A		intron_variant	Intron 1 of 1	2		ENSP00000485303.1
PCDHB12	ENST00000622978.1	c.165+164T>A		intron_variant	Intron 1 of 1	2		ENSP00000485352.1
ENSG00000280029	ENST00000624192.1	n.72+32437A>T		intron_variant	Intron 1 of 1	5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251034 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135888

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Jan 02, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.329T>A (p.M110K) alteration is located in exon 1 (coding exon 1) of the PCDHB12 gene. This alteration results from a T to A substitution at nucleotide position 329, causing the methionine (M) at amino acid position 110 to be replaced by a lysine (K). 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	Uncertain	0.40
BayesDel_addAF	Benign	-0.21	T
BayesDel_noAF	Benign	-0.37
CADD	Uncertain	23
DANN	Uncertain	0.98
DEOGEN2	Benign	0.023	T
Eigen	Uncertain	0.22
Eigen_PC	Benign	0.13
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.90	D
M_CAP	Benign	0.024	T
MetaRNN	Uncertain	0.64	D
MetaSVM	Benign	-0.85	T
MutationAssessor	Uncertain	2.5	M
PrimateAI	Benign	0.44	T
PROVEAN	Uncertain	-4.1	D
REVEL	Benign	0.24
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0010	D
Polyphen		0.85	P
Vest4		0.45
MutPred		0.74		Gain of catalytic residue at M110 (P = 0.0061);
MVP		0.51
MPC		0.74
ClinPred		0.93	D
GERP RS		4.3
Varity_R		0.86
gMVP		0.41

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: rs200930526; hg19: chr5-140588808;