22-50201341-C-G

Variant names:

• chr22-50201341-C-G
• rs753992805
• NM_031454.2:c.305C>G

Variant summary

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

The NM_031454.2(SELENOO):​c.305C>G​(p.Ala102Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000979 in 1,021,314 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A102V) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 9.8e-7 (0 hom.)
• Consequence: SELENOO NM_031454.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.92
• Publications: 0 publications found

Genes affected

SELENOO (HGNC:30395): (selenoprotein O) This gene encodes a selenoprotein that is localized to the mitochondria. It is the largest mammalian selenoprotein, containing the rare amino acid selenocysteine (Sec). Sec is encoded by the UGA codon, which normally signals translation termination. The 3' UTRs of selenoprotein mRNAs contain a conserved stem-loop structure, designated the Sec insertion sequence (SECIS) element, that is necessary for the recognition of UGA as a Sec codon, rather than as a stop signal. The exact function of this selenoprotein is not known, but it is thought to have redox activity. [provided by RefSeq, Dec 2016]

TRABD-AS1 (HGNC:56049): (TRABD antisense RNA 1)

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_031454.2. 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
	SELENOO	NM_031454.2	MANE Select	c.305C>G	p.Ala102Gly	missense	Exon 1 of 9	NP_113642.1	Q9BVL4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SELENOO	ENST00000380903.7	TSL:1 MANE Select	c.305C>G	p.Ala102Gly	missense	Exon 1 of 9	ENSP00000370288.2	Q9BVL4
	TRABD-AS1	ENST00000803400.1		n.83+173G>C		intron	N/A

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome AF: 9.79e-7 AC: 1 AN: 1021314 Hom.: 0 Cov.: 34 AF XY: 0.00000207 AC XY: 1 AN XY: 483318

African (AFR) AF: 0.00 AC: 0 AN: 20294

American (AMR) AF: 0.00 AC: 0 AN: 6288

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 11402

East Asian (EAS) AF: 0.00 AC: 0 AN: 20224

South Asian (SAS) AF: 0.00 AC: 0 AN: 20046

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 18058

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 2590

European-Non Finnish (NFE) AF: 0.00000113 AC: 1 AN: 883522

Other (OTH) AF: 0.00 AC: 0 AN: 38890

GnomAD4 genome Cov.: 34

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.30
BayesDel_addAF	Benign	-0.065	T
BayesDel_noAF	Benign	-0.33
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.25	T
Eigen	Uncertain	0.56
Eigen_PC	Uncertain	0.38
FATHMM_MKL	Benign	0.65	D
LIST_S2	Uncertain	0.95	D
MetaRNN	Uncertain	0.43	T
MetaSVM	Uncertain	-0.17	T
MutationAssessor	Pathogenic	3.4	M
PhyloP100		1.9
PrimateAI	Pathogenic	0.85	D
PROVEAN	Uncertain	-3.5	D
REVEL	Uncertain	0.36
Sift	Uncertain	0.0080	D
Sift4G	Uncertain	0.012	D
Polyphen		1.0	D
Vest4		0.21
MutPred		0.59		Gain of glycosylation at S99 (P = 0.1235)
MVP		0.69
MPC		0.50
ClinPred		0.99	D
GERP RS		2.9
PromoterAI		0.044	Neutral
Varity_R		0.73
Mutation Taster		=47/53	disease causing

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: rs753992805; hg19: chr22-50639770;