chr17-34357562-C-A

Position:

• chr17-34357562-C-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The ENST00000225844.7(CCL13):​c.164C>A​(p.Thr55Asn) 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. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CCL13 ENST00000225844.7 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.241

Genes affected

CCL13 (HGNC:10611): (C-C motif chemokine ligand 13) This antimicrobial gene is one of several Cys-Cys (CC) cytokine genes clustered on the q-arm of chromosome 17. Cytokines are a family of secreted proteins involved in immunoregulatory and inflammatory processes. The CC cytokines are proteins characterized by two adjacent cysteines. The cytokine encoded by this gene displays chemotactic activity for monocytes, lymphocytes, basophils and eosinophils, but not neutrophils. This chemokine plays a role in accumulation of leukocytes during inflammation. It may also be involved in the recruitment of monocytes into the arterial wall during artherosclerosis. [provided by RefSeq, Sep 2014]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.05821246).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CCL13	NM_005408.3	c.164C>A	p.Thr55Asn	missense_variant	2/3	ENST00000225844.7	NP_005399.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CCL13	ENST00000225844.7	c.164C>A	p.Thr55Asn	missense_variant	2/3	1	NM_005408.3	ENSP00000225844	P1
CCL13	ENST00000577681.1	c.80C>A	p.Thr27Asn	missense_variant	1/2	1		ENSP00000463667

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

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

Jan 08, 2024

The c.164C>A (p.T55N) alteration is located in exon 2 (coding exon 2) of the CCL13 gene. This alteration results from a C to A substitution at nucleotide position 164, causing the threonine (T) at amino acid position 55 to be replaced by an asparagine (N). 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	0.053
BayesDel_addAF	Benign	-0.37	T
BayesDel_noAF	Benign	-0.77
CADD	Benign	0.64
DANN	Benign	0.41
DEOGEN2	Benign	0.060	T
Eigen	Benign	-1.5
Eigen_PC	Benign	-1.5
FATHMM_MKL	Benign	0.017	N
LIST_S2	Benign	0.44	T
M_CAP	Benign	0.0052	T
MetaRNN	Benign	0.058	T
MetaSVM	Benign	-0.93	T
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.33	T
PROVEAN	Benign	0.97	N
REVEL	Benign	0.015
Sift	Benign	0.30	T
Sift4G	Benign	0.24	T
Polyphen		0.0	B
Vest4		0.15
MutPred		0.47		Loss of MoRF binding (P = 0.1378);
MVP		0.15
MPC		0.12
ClinPred		0.057	T
GERP RS		-4.1
Varity_R		0.24
gMVP		0.16

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs1910383284; hg19: chr17-32684581;