chr17-42683824-G-A

Position:

• chr17-42683824-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_003632.3(CNTNAP1):​c.71G>A​(p.Gly24Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G24R) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CNTNAP1 NM_003632.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.43

Genes affected

CNTNAP1 (HGNC:8011): (contactin associated protein 1) The gene product was initially identified as a 190-kD protein associated with the contactin-PTPRZ1 complex. The 1,384-amino acid protein, also designated p190 or CASPR for 'contactin-associated protein,' includes an extracellular domain with several putative protein-protein interaction domains, a putative transmembrane domain, and a 74-amino acid cytoplasmic domain. Northern blot analysis showed that the gene is transcribed predominantly in brain as a transcript of 6.2 kb, with weak expression in several other tissues tested. The architecture of its extracellular domain is similar to that of neurexins, and this protein may be the signaling subunit of contactin, enabling recruitment and activation of intracellular signaling pathways in neurons. [provided by RefSeq, Jan 2009]

(HGNC:):

CCR10 (HGNC:4474): (C-C motif chemokine receptor 10) Chemokines are a group of small (approximately 8 to 14 kD), mostly basic, structurally related molecules that regulate cell trafficking of various types of leukocytes through interactions with a subset of 7-transmembrane, G protein-coupled receptors. Chemokines also play fundamental roles in the development, homeostasis, and function of the immune system, and they have effects on cells of the central nervous system as well as on endothelial cells involved in angiogenesis or angiostasis. Chemokines are divided into 2 major subfamilies, CXC and CC, based on the arrangement of the first 2 of the 4 conserved cysteine residues; the 2 cysteines are separated by a single amino acid in CXC chemokines and are adjacent in CC chemokines. CCR10 is the receptor for CCL27 (SCYA27; MIM 604833); CCR10-CCL27 interactions are involved in T cell-mediated skin inflammation (Homey et al., 2002 [PubMed 11821900]).[supplied by OMIM, Mar 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), CNTNAP1. . Gene score misZ 3.2225 (greater than the threshold 3.09). Trascript score misZ 3.8309 (greater than threshold 3.09). GenCC has associacion of gene with lethal congenital contracture syndrome 7, hypomyelination neuropathy-arthrogryposis syndrome.
• BP4: Computational evidence support a benign effect (MetaRNN=0.22802529).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CNTNAP1	NM_003632.3	c.71G>A	p.Gly24Asp	missense_variant	2/24	ENST00000264638.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CNTNAP1	ENST00000264638.9	c.71G>A	p.Gly24Asp	missense_variant	2/24	1	NM_003632.3	P1
CNTNAP1	ENST00000591662.1	c.71G>A	p.Gly24Asp	missense_variant, NMD_transcript_variant	2/24	1
	ENST00000592440.1	n.364-282C>T		intron_variant, non_coding_transcript_variant		2
CCR10	ENST00000591568.1	c.-651C>T		5_prime_UTR_variant	1/2	3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 40

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Mar 29, 2022

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals affected with CNTNAP1-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces glycine, which is neutral and non-polar, with aspartic acid, which is acidic and polar, at codon 24 of the CNTNAP1 protein (p.Gly24Asp). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.17
BayesDel_addAF	Uncertain	0.087	D
BayesDel_noAF	Benign	-0.11
CADD	Benign	22
DANN	Uncertain	0.97
DEOGEN2	Benign	0.056	T
Eigen	Benign	-0.32
Eigen_PC	Benign	-0.11
FATHMM_MKL	Benign	0.64	D
LIST_S2	Benign	0.73	T
M_CAP	Benign	0.065	D
MetaRNN	Benign	0.23	T
MetaSVM	Benign	-0.41	T
MutationAssessor	Benign	0.0	N
MutationTaster	Benign	0.65	D
PrimateAI	Uncertain	0.66	T
PROVEAN	Benign	1.2	N
REVEL	Uncertain	0.41
Sift	Benign	0.71	T
Sift4G	Uncertain	0.057	T
Polyphen		0.28	B
Vest4		0.23
MutPred		0.50		Gain of phosphorylation at Y22 (P = 0.1213);
MVP		0.67
MPC		1.4
ClinPred		0.84	D
GERP RS		4.8
Varity_R		0.12
gMVP		0.52

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: chr17-40835842;