21-44286008-T-C

Variant names:

• chr21-44286008-T-C
• NM_000383.4:c.2T>C

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PVS1 PS1_Moderate PM2 PP5_Moderate

The NM_000383.4(AIRE):​c.2T>C​(p.Met1?) variant causes a start lost change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: AIRE NM_000383.4 start_lost
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: -5.77

Genes affected

AIRE (HGNC:360): (autoimmune regulator) This gene encodes a transcriptional regulator that forms nuclear bodies and interacts with the transcriptional coactivator CREB binding protein. The encoded protein plays an important role in immunity by regulating the expression of autoantigens and negative selection of autoreactive T-cells in the thymus. Mutations in this gene cause the rare autosomal-recessive systemic autoimmune disease termed autoimmune polyendocrinopathy with candidiasis and ectodermal dystrophy (APECED). [provided by RefSeq, Jun 2012]

ACMG classification

Verdict is Pathogenic. Variant got 14 ACMG points.

• PVS1: Start lost variant, next in-frame start position is after 37 pathogenic variants. Next in-frame start position is after 184 codons. Genomic position: 44288356. Lost 0.336 part of the original CDS.
• PS1: Another start lost variant in NM_000383.4 (AIRE) was described as [Pathogenic] in Lovd
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 21-44286008-T-C is Pathogenic according to our data. Variant chr21-44286008-T-C is described in ClinVar as [Pathogenic]. Clinvar id is 2138396.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr21-44286008-T-C is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AIRE	NM_000383.4	c.2T>C	p.Met1?	start_lost	Exon 1 of 14	ENST00000291582.6	NP_000374.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AIRE	ENST00000291582.6	c.2T>C	p.Met1?	start_lost	Exon 1 of 14	1	NM_000383.4	ENSP00000291582.5
AIRE	ENST00000527919.5	n.163T>C		non_coding_transcript_exon_variant	Exon 1 of 14	2
AIRE	ENST00000530812.5	n.171T>C		non_coding_transcript_exon_variant	Exon 1 of 12	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Polyglandular autoimmune syndrome, type 1 Pathogenic:1

Aug 05, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is not present in population databases (gnomAD no frequency). Disruption of the initiator codon has been observed in individual(s) with autosomal recessive autoimmune polyendocrinopathy syndrome (PMID: 16965330, 19758376, 28446514, 28911151). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. For these reasons, this variant has been classified as Pathogenic. This sequence change affects the initiator methionine of the AIRE mRNA. The next in-frame methionine is located at codon 184. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.62	D
BayesDel_noAF	Uncertain	0.030
CADD	Benign	4.0
DANN	Benign	0.71
DEOGEN2	Benign	0.21	T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.2
FATHMM_MKL	Benign	0.0049	N
LIST_S2	Uncertain	0.90	D
M_CAP	Pathogenic	0.64	D
MetaRNN	Pathogenic	0.93	D
MetaSVM	Uncertain	-0.23	T
PROVEAN	Benign	0.070	N
REVEL	Uncertain	0.55
Sift	Uncertain	0.018	D
Sift4G	Uncertain	0.010	D
Polyphen		0.069	B
Vest4		0.74
MutPred		0.70		Loss of stability (P = 0.0161);
MVP		0.97
ClinPred		0.054	T
GERP RS		-0.84
Varity_R		0.27
gMVP		0.72

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: chr21-45705891;