9-34709423-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_002989.4(CCL21):c.376G>A(p.Glu126Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000993 in 1,611,140 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000082 ( 0 hom. )

Consequence

CCL21
NM_002989.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.254

Variant links:

Genes affected

CCL21 (HGNC:10620): (C-C motif chemokine ligand 21) This antimicrobial gene is one of several CC cytokine genes clustered on the p-arm of chromosome 9. Cytokines are a family of secreted proteins involved in immunoregulatory and inflammatory processes. The CC cytokines are proteins characterized by two adjacent cysteines. Similar to other chemokines the protein encoded by this gene inhibits hemopoiesis and stimulates chemotaxis. This protein is chemotactic in vitro for thymocytes and activated T cells, but not for B cells, macrophages, or neutrophils. The cytokine encoded by this gene may also play a role in mediating homing of lymphocytes to secondary lymphoid organs. It is a high affinity functional ligand for chemokine receptor 7 that is expressed on T and B lymphocytes and a known receptor for another member of the cytokine family (small inducible cytokine A19). [provided by RefSeq, Sep 2014]

CCL21 links:

(HGNC:):

links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.043450624).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
CCL21	NM_002989.4 linkuse as main transcript	c.376G>A	p.Glu126Lys	missense_variant	4/4	ENST00000259607.7
PHF24	XM_047423102.1 linkuse as main transcript	c.133+6385C>T		intron_variant
PHF24	XM_047423103.1 linkuse as main transcript	c.70+6385C>T		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
CCL21	ENST00000259607.7 linkuse as main transcript	c.376G>A	p.Glu126Lys	missense_variant	4/4	1	NM_002989.4	P1
	ENST00000664167.1 linkuse as main transcript	n.86+6385C>T		intron_variant, non_coding_transcript_variant
CCL21	ENST00000378792.1 linkuse as main transcript	c.*73G>A		3_prime_UTR_variant	3/3	2

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152202

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.00000805

AC:

AN:

248410

Hom.:

AF XY:

0.00000744

AC XY:

AN XY:

134430

show subpopulations

Gnomad AFR exome

AF:

0.0000619

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000888

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000823

AC:

AN:

1458938

Hom.:

Cov.:

AF XY:

0.00000964

AC XY:

AN XY:

725974

show subpopulations

Gnomad4 AFR exome

AF:

0.000121

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000360

Gnomad4 OTH exome

AF:

0.0000499

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152202

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74348

show subpopulations

Gnomad4 AFR

AF:

0.0000724

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000478

Bravo

AF:

0.0000453

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 06, 2022

The c.376G>A (p.E126K) alteration is located in exon 4 (coding exon 4) of the CCL21 gene. This alteration results from a G to A substitution at nucleotide position 376, causing the glutamic acid (E) at amino acid position 126 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

Benign

0.11

BayesDel_addAF

Benign

-0.41

BayesDel_noAF

Benign

-0.64

Cadd

Benign

Dann

Uncertain

1.0

DEOGEN2

Benign

0.11

Eigen

Benign

-0.60

Eigen_PC

Benign

-0.59

FATHMM_MKL

Benign

0.057

LIST_S2

Benign

0.57

M_CAP

Benign

0.016

MetaRNN

Benign

0.043

MetaSVM

Benign

-0.99

MutationAssessor

Benign

1.9

MutationTaster

Benign

1.0

D;N

PrimateAI

Benign

0.33

PROVEAN

Benign

-0.74

REVEL

Benign

0.040

Sift

Uncertain

0.021

Sift4G

Pathogenic

0.0

Polyphen

0.0050

Vest4

0.18

MutPred

0.25

Gain of methylation at E126 (P = 0.0024);

MVP

0.33

MPC

0.13

ClinPred

0.13

GERP RS

1.5

Varity_R

0.055

gMVP

0.35

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over