chr2-206651838-C-A

Variant names:

• chr2-206651838-C-A
• rs1311813445
• NM_001093730.1:c.1717G>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001093730.1(DYTN):​c.1717G>T​(p.Ala573Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,300 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 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)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: DYTN NM_001093730.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.70
• Publications: 2 publications found

Genes affected

DYTN (HGNC:23279): (dystrotelin) This gene belongs to the dystrophin superfamily, which is characterized by the presence of four EF-hand motifs and a ZZ-domain. It is a likely ortholog of the Drosophila 'discontinuous actin hexagon' gene. It is noteworthy that the coding region of this gene lacks two coding exons that are found in the mouse ortholog. Human transcripts including these two exons are subject to nonsense-mediated transcript decay (NMD). On the other hand, transcripts skipping the two coding exons are expressed at very low levels. While this gene maintains an intact CDS, it may be an evolving pseudogene. However, after a discussion about this gene within the RefSeq group, as well as in the consensus coding sequence (CCDS) collaboration, it was decided to keep it as a protein-coding gene in the RefSeq, Ensembl-GENCODE and the CCDS sets. [provided by RefSeq, Jul 2019]

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.08135715).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001093730.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DYTN	NM_001093730.1	MANE Select	c.1717G>T	p.Ala573Ser	missense	Exon 12 of 12	NP_001087199.1	A2CJ06

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DYTN	ENST00000452335.2	TSL:1 MANE Select	c.1717G>T	p.Ala573Ser	missense	Exon 12 of 12	ENSP00000396593.2	A2CJ06
	DYTN	ENST00000674258.1		n.2268G>T		non_coding_transcript_exon	Exon 15 of 15

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.0000120 AC: 3 AN: 249132 AF XY: 0.00000740

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000167

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461300 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 726934

African (AFR) AF: 0.00 AC: 0 AN: 33456

American (AMR) AF: 0.00 AC: 0 AN: 44708

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26110

East Asian (EAS) AF: 0.0000756 AC: 3 AN: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86238

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53396

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111574

Other (OTH) AF: 0.00 AC: 0 AN: 60358

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.074
BayesDel_addAF	Benign	-0.50	T
BayesDel_noAF	Benign	-0.70
CADD	Benign	14
DANN	Benign	0.89
DEOGEN2	Benign	0.0012	T
Eigen	Benign	-0.94
Eigen_PC	Benign	-0.85
FATHMM_MKL	Benign	0.43	N
LIST_S2	Benign	0.36	T
M_CAP	Benign	0.0061	T
MetaRNN	Benign	0.081	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.69	N
PhyloP100		1.7
PrimateAI	Benign	0.34	T
PROVEAN	Benign	-0.15	N
REVEL	Benign	0.052
Sift	Uncertain	0.0030	D
Sift4G	Benign	0.098	T
Polyphen		0.0020	B
Vest4		0.098
MutPred		0.22		Loss of helix (P = 0.028)
MVP		0.014
MPC		0.026
ClinPred		0.12	T
GERP RS		3.0
Varity_R		0.060
gMVP		0.078
Mutation Taster		=97/3	polymorphism

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

Other links and lift over

dbSNP: rs1311813445; hg19: chr2-207516562; COSMIC: COSV71513264; COSMIC: COSV71513264;