Genetic Variant MIR299:n.15C>A (chr14-101023808-C-A) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The ENST00000385016.4(MIR299):n.15C>A variant causes a non coding transcript exon change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000378 in 529,622 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000026 ( 0 hom. )

Consequence

MIR299
ENST00000385016.4 non_coding_transcript_exon

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.989

Publications

7 publications found

Variant links:

COSMIC-nc: COSV100760435

Genes affected

MIR299 (HGNC:31618): (microRNA 299) microRNAs (miRNAs) are short (20-24 nt) non-coding RNAs that are involved in post-transcriptional regulation of gene expression in multicellular organisms by affecting both the stability and translation of mRNAs. miRNAs are transcribed by RNA polymerase II as part of capped and polyadenylated primary transcripts (pri-miRNAs) that can be either protein-coding or non-coding. The primary transcript is cleaved by the Drosha ribonuclease III enzyme to produce an approximately 70-nt stem-loop precursor miRNA (pre-miRNA), which is further cleaved by the cytoplasmic Dicer ribonuclease to generate the mature miRNA and antisense miRNA star (miRNA*) products. The mature miRNA is incorporated into a RNA-induced silencing complex (RISC), which recognizes target mRNAs through imperfect base pairing with the miRNA and most commonly results in translational inhibition or destabilization of the target mRNA. The RefSeq represents the predicted microRNA stem-loop. [provided by RefSeq, Sep 2009]

MIR299 links:

LOC124903407 (HGNC:):

LOC124903407 links:

MEG8 (HGNC:14574): (maternally expressed 8, small nucleolar RNA host gene) This gene is located in a cluster of imprinted genes on chromosome 14q32.3. It encodes a a non-protein coding transcript that is preferentially expressed from the maternal allele in skeletal muscle, and appears to be coordinately regulated with other imprinted genes in this region. [provided by RefSeq, Oct 2010]

MEG8 links:

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ACMG classification

Classification was made for transcript

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 (BayesDel_noAF=-0.2).

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	Exon rank	Protein
MIR299	NR_029841.1 link	n.15C>A	non_coding_transcript_exon_variant	Exon 1 of 1
MIR299	unassigned_transcript_2380	n.9C>A	non_coding_transcript_exon_variant	Exon 1 of 1
LOC124903407	XM_047432049.1 link	c.*3004C>A	3_prime_UTR_variant	Exon 5 of 5	XP_047288005.1
MIR299	unassigned_transcript_2381	n.-24C>A	upstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MIR299	ENST00000385016.4 link	n.15C>A		non_coding_transcript_exon_variant	Exon 1 of 1	6
MEG8	ENST00000636391.2 link	n.2086-3538C>A		intron_variant	Intron 24 of 28	5

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152180

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00000406

AC:

AN:

246462

AF XY:

0.00000749

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000897

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000265

AC:

AN:

377442

Hom.:

Cov.:

AF XY:

0.00000465

AC XY:

AN XY:

214850

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

10274

American (AMR)

AF:

0.00

AC:

AN:

35416

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

11660

East Asian (EAS)

AF:

0.00

AC:

AN:

13144

South Asian (SAS)

AF:

0.00

AC:

AN:

65432

European-Finnish (FIN)

AF:

0.00

AC:

AN:

31940

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2048

European-Non Finnish (NFE)

AF:

0.00000523

AC:

AN:

191032

Other (OTH)

AF:

0.00

AC:

AN:

16496

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152180

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74348

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41428

American (AMR)

AF:

0.00

AC:

AN:

15284

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5188

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68040

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.20

CADD

Benign

(source)

DANN

Benign

0.91

PhyloP100

0.99

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over