5-140848623-C-A

Position:

• chr5-140848623-C-A

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_Strong BS2

The NM_031857.2(PCDHA9):​c.128C>A​(p.Thr43Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00236 in 1,588,346 control chromosomes in the GnomAD database, including 451 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.0054 (16 hom., cov: 29)
  • Exomes 𝑓: 0.0020 (435 hom.)
• Consequence: PCDHA9 NM_031857.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1 B:1
• Conservation: PhyloP100: 2.08

Genes affected

PCDHA9 (HGNC:8675): (protocadherin alpha 9) This gene is a member of the protocadherin alpha gene cluster, one of three related gene clusters tandemly linked on chromosome five that demonstrate an unusual genomic organization similar to that of B-cell and T-cell receptor gene clusters. The alpha gene cluster is composed of 15 cadherin superfamily genes related to the mouse CNR genes and consists of 13 highly similar and 2 more distantly related coding sequences. The tandem array of 15 N-terminal exons, or variable exons, are followed by downstream C-terminal exons, or constant exons, which are shared by all genes in the cluster. The large, uninterrupted N-terminal exons each encode six cadherin ectodomains while the C-terminal exons encode the cytoplasmic domain. These neural cadherin-like cell adhesion proteins are integral plasma membrane proteins that most likely play a critical role in the establishment and function of specific cell-cell connections in the brain. Alternative splicing has been observed and additional variants have been suggested but their full-length nature has yet to be determined. [provided by RefSeq, Jul 2008]

PCDHA1 (HGNC:8663): (protocadherin alpha 1) This gene is a member of the protocadherin alpha gene cluster, one of three related gene clusters tandemly linked on chromosome five that demonstrate an unusual genomic organization similar to that of B-cell and T-cell receptor gene clusters. The alpha gene cluster is composed of 15 cadherin superfamily genes related to the mouse CNR genes and consists of 13 highly similar and 2 more distantly related coding sequences. The tandem array of 15 N-terminal exons, or variable exons, are followed by downstream C-terminal exons, or constant exons, which are shared by all genes in the cluster. The large, uninterrupted N-terminal exons each encode six cadherin ectodomains while the C-terminal exons encode the cytoplasmic domain. These neural cadherin-like cell adhesion proteins are integral plasma membrane proteins that most likely play a critical role in the establishment and function of specific cell-cell connections in the brain. Alternative splicing has been observed and additional variants have been suggested but their full-length nature has yet to be determined. [provided by RefSeq, Jul 2008]

PCDHA2 (HGNC:8668): (protocadherin alpha 2) This gene is a member of the protocadherin alpha gene cluster, one of three related gene clusters tandemly linked on chromosome five that demonstrate an unusual genomic organization similar to that of B-cell and T-cell receptor gene clusters. The alpha gene cluster is composed of 15 cadherin superfamily genes related to the mouse CNR genes and consists of 13 highly similar and 2 more distantly related coding sequences. The tandem array of 15 N-terminal exons, or variable exons, are followed by downstream C-terminal exons, or constant exons, which are shared by all genes in the cluster. The large, uninterrupted N-terminal exons each encode six cadherin ectodomains while the C-terminal exons encode the cytoplasmic domain. These neural cadherin-like cell adhesion proteins are integral plasma membrane proteins that most likely play a critical role in the establishment and function of specific cell-cell connections in the brain. Alternative splicing has been observed and additional variants have been suggested but their full-length nature has yet to be determined. [provided by RefSeq, Jul 2008]

PCDHA3 (HGNC:8669): (protocadherin alpha 3) This gene is a member of the protocadherin alpha gene cluster, one of three related gene clusters tandemly linked on chromosome five that demonstrate an unusual genomic organization similar to that of B-cell and T-cell receptor gene clusters. The alpha gene cluster is composed of 15 cadherin superfamily genes related to the mouse CNR genes and consists of 13 highly similar and 2 more distantly related coding sequences. The tandem array of 15 N-terminal exons, or variable exons, are followed by downstream C-terminal exons, or constant exons, which are shared by all genes in the cluster. The large, uninterrupted N-terminal exons each encode six cadherin ectodomains while the C-terminal exons encode the cytoplasmic domain. These neural cadherin-like cell adhesion proteins are integral plasma membrane proteins that most likely play a critical role in the establishment and function of specific cell-cell connections in the brain. Alternative splicing has been observed and additional variants have been suggested but their full-length nature has yet to be determined. [provided by RefSeq, Jul 2008]

PCDHA4 (HGNC:8670): (protocadherin alpha 4) This gene is a member of the protocadherin alpha gene cluster, one of three related gene clusters tandemly linked on chromosome five that demonstrate an unusual genomic organization similar to that of B-cell and T-cell receptor gene clusters. The alpha gene cluster is composed of 15 cadherin superfamily genes related to the mouse CNR genes and consists of 13 highly similar and 2 more distantly related coding sequences. The tandem array of 15 N-terminal exons, or variable exons, are followed by downstream C-terminal exons, or constant exons, which are shared by all genes in the cluster. The large, uninterrupted N-terminal exons each encode six cadherin ectodomains while the C-terminal exons encode the cytoplasmic domain. These neural cadherin-like cell adhesion proteins are integral plasma membrane proteins that most likely play a critical role in the establishment and function of specific cell-cell connections in the brain. Alternative splicing has been observed and additional variants have been suggested but their full-length nature has yet to be determined. [provided by RefSeq, Jul 2008]

PCDHA5 (HGNC:8671): (protocadherin alpha 5) This gene is a member of the protocadherin alpha gene cluster, one of three related gene clusters tandemly linked on chromosome five that demonstrate an unusual genomic organization similar to that of B-cell and T-cell receptor gene clusters. The alpha gene cluster is composed of 15 cadherin superfamily genes related to the mouse CNR genes and consists of 13 highly similar and 2 more distantly related coding sequences. The tandem array of 15 N-terminal exons, or variable exons, are followed by downstream C-terminal exons, or constant exons, which are shared by all genes in the cluster. The large, uninterrupted N-terminal exons each encode six cadherin ectodomains while the C-terminal exons encode the cytoplasmic domain. These neural cadherin-like cell adhesion proteins are integral plasma membrane proteins that most likely play a critical role in the establishment and function of specific cell-cell connections in the brain. Alternative splicing has been observed and additional variants have been suggested but their full-length nature has yet to be determined. [provided by RefSeq, Jul 2008]

PCDHA6 (HGNC:8672): (protocadherin alpha 6) This gene is a member of the protocadherin alpha gene cluster, one of three related gene clusters tandemly linked on chromosome five that demonstrate an unusual genomic organization similar to that of B-cell and T-cell receptor gene clusters. The alpha gene cluster is composed of 15 cadherin superfamily genes related to the mouse CNR genes and consists of 13 highly similar and 2 more distantly related coding sequences. The tandem array of 15 N-terminal exons, or variable exons, are followed by downstream C-terminal exons, or constant exons, which are shared by all genes in the cluster. The large, uninterrupted N-terminal exons each encode six cadherin ectodomains while the C-terminal exons encode the cytoplasmic domain. These neural cadherin-like cell adhesion proteins are integral plasma membrane proteins that most likely play a critical role in the establishment and function of specific cell-cell connections in the brain. Alternative splicing has been observed and additional variants have been suggested but their full-length nature has yet to be determined. [provided by RefSeq, Jul 2008]

PCDHA7 (HGNC:8673): (protocadherin alpha 7) This gene is a member of the protocadherin alpha gene cluster, one of three related gene clusters tandemly linked on chromosome five that demonstrate an unusual genomic organization similar to that of B-cell and T-cell receptor gene clusters. The alpha gene cluster is composed of 15 cadherin superfamily genes related to the mouse CNR genes and consists of 13 highly similar and 2 more distantly related coding sequences. The tandem array of 15 N-terminal exons, or variable exons, are followed by downstream C-terminal exons, or constant exons, which are shared by all genes in the cluster. The large, uninterrupted N-terminal exons each encode six cadherin ectodomains while the C-terminal exons encode the cytoplasmic domain. These neural cadherin-like cell adhesion proteins are integral plasma membrane proteins that most likely play a critical role in the establishment and function of specific cell-cell connections in the brain. Alternative splicing has been observed and additional variants have been suggested but their full-length nature has yet to be determined. [provided by RefSeq, Jul 2008]

PCDHA8 (HGNC:8674): (protocadherin alpha 8) This gene is a member of the protocadherin alpha gene cluster, one of three related gene clusters tandemly linked on chromosome five that demonstrate an unusual genomic organization similar to that of B-cell and T-cell receptor gene clusters. The alpha gene cluster is composed of 15 cadherin superfamily genes related to the mouse CNR genes and consists of 13 highly similar and 2 more distantly related coding sequences. The tandem array of 15 N-terminal exons, or variable exons, are followed by downstream C-terminal exons, or constant exons, which are shared by all genes in the cluster. The large, uninterrupted N-terminal exons each encode six cadherin ectodomains while the C-terminal exons encode the cytoplasmic domain. These neural cadherin-like cell adhesion proteins are integral plasma membrane proteins that most likely play a critical role in the establishment and function of specific cell-cell connections in the brain. Alternative splicing has been observed and additional variants have been suggested but their full-length nature has yet to be determined. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -8 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.010096908).
• BS2: High Homozygotes in GnomAd4 at 16 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PCDHA9	NM_031857.2	c.128C>A	p.Thr43Asn	missense_variant	1/4	ENST00000532602.2
PCDHA1	NM_018900.4	c.2394+59939C>A		intron_variant		ENST00000504120.4
PCDHA2	NM_018905.3	c.2388+51271C>A		intron_variant		ENST00000526136.2
PCDHA3	NM_018906.3	c.2394+45032C>A		intron_variant		ENST00000522353.3
PCDHA4	NM_018907.4	c.2385+39051C>A		intron_variant		ENST00000530339.2
PCDHA5	NM_018908.3	c.2352+24496C>A		intron_variant		ENST00000529859.2
PCDHA6	NM_018909.4	c.2394+18138C>A		intron_variant		ENST00000529310.6
PCDHA7	NM_018910.3	c.2355+11885C>A		intron_variant		ENST00000525929.2
PCDHA8	NM_018911.3	c.2394+4908C>A		intron_variant		ENST00000531613.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PCDHA9	ENST00000532602.2	c.128C>A	p.Thr43Asn	missense_variant	1/4	1	NM_031857.2	P1
PCDHA1	ENST00000504120.4	c.2394+59939C>A		intron_variant		1	NM_018900.4	P1
PCDHA3	ENST00000522353.3	c.2394+45032C>A		intron_variant		1	NM_018906.3	P1
PCDHA7	ENST00000525929.2	c.2355+11885C>A		intron_variant		1	NM_018910.3	P1
PCDHA2	ENST00000526136.2	c.2388+51271C>A		intron_variant		1	NM_018905.3	P1
PCDHA6	ENST00000529310.6	c.2394+18138C>A		intron_variant		1	NM_018909.4	P1
PCDHA5	ENST00000529859.2	c.2352+24496C>A		intron_variant		1	NM_018908.3	P1
PCDHA4	ENST00000530339.2	c.2385+39051C>A		intron_variant		1	NM_018907.4	P1
PCDHA8	ENST00000531613.2	c.2394+4908C>A		intron_variant		1	NM_018911.3	P1

Frequencies

GnomAD3 genomes AF: 0.00543 AC: 813 AN: 149688 Hom.: 16 Cov.: 29

Gnomad AFR AF: 0.000830

Gnomad AMI AF: 0.00110

Gnomad AMR AF: 0.00722

Gnomad ASJ AF: 0.0208

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.0157

Gnomad FIN AF: 0.00105

Gnomad MID AF: 0.0195

Gnomad NFE AF: 0.00737

Gnomad OTH AF: 0.00831

GnomAD4 exome AF: 0.00204 AC: 2935 AN: 1438540 Hom.: 435 Cov.: 84 AF XY: 0.00223 AC XY: 1596 AN XY: 715256

Gnomad4 AFR exome AF: 0.000540

Gnomad4 AMR exome AF: 0.00231

Gnomad4 ASJ exome AF: 0.0118

Gnomad4 EAS exome AF: 0.000101

Gnomad4 SAS exome AF: 0.00488

Gnomad4 FIN exome AF: 0.000966

Gnomad4 NFE exome AF: 0.00163

Gnomad4 OTH exome AF: 0.00372

GnomAD4 genome AF: 0.00542 AC: 812 AN: 149806 Hom.: 16 Cov.: 29 AF XY: 0.00487 AC XY: 357 AN XY: 73236

Gnomad4 AFR AF: 0.000827

Gnomad4 AMR AF: 0.00721

Gnomad4 ASJ AF: 0.0208

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.0155

Gnomad4 FIN AF: 0.00105

Gnomad4 NFE AF: 0.00737

Gnomad4 OTH AF: 0.00822

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.00106 AC: 9

ExAC AF: 0.00719 AC: 867

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1 Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 30, 2023

The c.128C>A (p.T43N) alteration is located in exon 1 (coding exon 1) of the PCDHA9 gene. This alteration results from a C to A substitution at nucleotide position 128, causing the threonine (T) at amino acid position 43 to be replaced by an asparagine (N). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

PCDHA9-related disorder Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Sep 25, 2020

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.17
BayesDel_addAF	Benign	-0.068	T
BayesDel_noAF	Benign	-0.34
CADD	Uncertain	24
DANN	Uncertain	0.98
DEOGEN2	Benign	0.052	T;.
Eigen	Benign	-0.022
Eigen_PC	Benign	-0.054
FATHMM_MKL	Benign	0.70	D
LIST_S2	Benign	0.71	T;T
MetaRNN	Benign	0.010	T;T
MetaSVM	Benign	-0.45	T
MutationAssessor	Pathogenic	3.8	H;H
MutationTaster	Benign	1.0	D;D;D;D;D;D;D;D;D;D;D;D;D;D
PROVEAN	Pathogenic	-4.8	D;D
REVEL	Benign	0.16
Sift	Uncertain	0.010	D;D
Sift4G	Uncertain	0.0070	D;D
Polyphen		0.020	B;B
Vest4		0.49
MVP		0.66
ClinPred		0.19	T
GERP RS		3.7
Varity_R		0.87
gMVP		0.71

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: rs186780543; hg19: chr5-140228208; COSMIC: COSV65326744; COSMIC: COSV65326744;