chr20-3471175-C-T

Position:

• chr20-3471175-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_139321.3(ATRN):​c.68C>T​(p.Ala23Val) 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. A23G) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: ATRN NM_139321.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.557

Genes affected

ATRN (HGNC:885): (attractin) This gene encodes both membrane-bound and secreted protein isoforms. A membrane-bound isoform exhibits sequence similarity with the mouse mahogany protein, a receptor involved in controlling obesity. A secreted isoform is involved in the initial immune cell clustering during inflammatory responses that may regulate the chemotactic activity of chemokines. [provided by RefSeq, Apr 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.118658006).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ATRN	NM_139321.3	c.68C>T	p.Ala23Val	missense_variant	1/29	ENST00000262919.10
ATRN	NM_001323332.2	c.68C>T	p.Ala23Val	missense_variant	1/26
ATRN	NM_139322.4	c.68C>T	p.Ala23Val	missense_variant	1/25
ATRN	NM_001207047.3	c.62+41C>T		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ATRN	ENST00000262919.10	c.68C>T	p.Ala23Val	missense_variant	1/29	5	NM_139321.3	P2
ATRN	ENST00000446916.2	c.68C>T	p.Ala23Val	missense_variant	1/25	1		A2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1350942 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 666258

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

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 01, 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: "Tolerated"; PolyPhen-2: "Not Available"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals affected with ATRN-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 23 of the ATRN protein (p.Ala23Val). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.17
BayesDel_addAF	Benign	-0.25	T
BayesDel_noAF	Benign	-0.60
CADD	Benign	18
DANN	Uncertain	0.99
DEOGEN2	Benign	0.055	T;.
Eigen	Benign	-0.76
Eigen_PC	Benign	-0.68
FATHMM_MKL	Benign	0.30	N
LIST_S2	Benign	0.56	T;T
M_CAP	Uncertain	0.26	D
MetaRNN	Benign	0.12	T;T
MetaSVM	Benign	-0.96	T
MutationAssessor	Benign	0.69	N;N
MutationTaster	Benign	1.0	N;N
PrimateAI	Pathogenic	0.84	D
PROVEAN	Benign	0.18	N;N
REVEL	Benign	0.014
Sift	Benign	0.066	T;T
Sift4G	Benign	0.15	T;T
Polyphen		0.012	B;B
Vest4		0.12
MutPred		0.25		Loss of disorder (P = 0.1176);Loss of disorder (P = 0.1176);
MVP		0.18
MPC		0.73
ClinPred		0.091	T
GERP RS		3.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.085
gMVP		0.30

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: chr20-3451822;