14-100848820-C-T

Variant names:

• chr14-100848820-C-T
• rs186345479
• ENST00000649261.2:n.1643+3287C>T

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_Strong BP6 BS2

The NR_046473.1(MEG3):​n.4204C>T 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 0.00143 in 151,454 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (no stars).

• Frequency:
  • Genomes: 𝑓 0.0014 (2 hom., cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: MEG3 NR_046473.1 non_coding_transcript_exon
• Clinical Significance: Likely benign no assertion criteria provided B:1
• Conservation: PhyloP100: -3.16
• Publications: 0 publications found

Genes affected

MEG3 (HGNC:14575): (maternally expressed 3) This gene is a maternally expressed imprinted gene. Multiple alternatively spliced transcript variants have been transcribed from this gene and all of them are long non-coding RNAs (lncRNAs). This gene is expressed in many normal tissues, but its expression is lost in multiple cancer cell lines of various tissue origins. It inhibits tumor cell proliferation in vitro. It also interacts with the tumor suppressor p53, and regulates p53 target gene expression. Its deletion enhances angiogenesis in vivo. Many experimental evidences demonstrate that this gene is a lncRNA tumor suppressor. [provided by RefSeq, Mar 2012]

ENSG00000258663 (HGNC:):

MIR493HG (HGNC:55978): (MIR493 cluster host gene)

ACMG classification

Our verdict: Benign. The variant received -9 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.94).
• BP6: Variant 14-100848820-C-T is Benign according to our data. Variant chr14-100848820-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 3052746.Status of the report is no_assertion_criteria_provided, 0 stars.
• BS2: High Homozygotes in GnomAd4 at 2 gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NR_046473.1. 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
	MEG3	NR_190993.1	MANE Select	n.1643+3287C>T		intron	N/A
	MEG3	NR_046473.1		n.4204C>T		non_coding_transcript_exon	Exon 7 of 7
	MEG3	NR_190994.1		n.4314C>T		non_coding_transcript_exon	Exon 8 of 8

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MEG3	ENST00000649261.2	MANE Select	n.1643+3287C>T		intron	N/A
	MEG3	ENST00000398461.6	TSL:1	n.3121+3287C>T		intron	N/A
	MEG3	ENST00000429159.7	TSL:1	n.1275+3287C>T		intron	N/A

Frequencies

GnomAD3 genomes AF: 0.00142 AC: 215 AN: 151336 Hom.: 2 Cov.: 33

Gnomad AFR AF: 0.00278

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000987

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00398

Gnomad FIN AF: 0.000192

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000913

Gnomad OTH AF: 0.00144

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 6 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 2

African (AFR) AC: 0 AN: 0

American (AMR) AC: 0 AN: 0

Ashkenazi Jewish (ASJ) AC: 0 AN: 0

East Asian (EAS) AC: 0 AN: 0

South Asian (SAS) AC: 0 AN: 0

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 4

Middle Eastern (MID) AC: 0 AN: 0

European-Non Finnish (NFE) AC: 0 AN: 0

Other (OTH) AF: 0.00 AC: 0 AN: 2

GnomAD4 genome AF: 0.00143 AC: 216 AN: 151454 Hom.: 2 Cov.: 33 AF XY: 0.00134 AC XY: 99 AN XY: 73966

African (AFR) AF: 0.00279 AC: 115 AN: 41182

American (AMR) AF: 0.000985 AC: 15 AN: 15224

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5150

South Asian (SAS) AF: 0.00399 AC: 19 AN: 4766

European-Finnish (FIN) AF: 0.000192 AC: 2 AN: 10432

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.000913 AC: 62 AN: 67922

Other (OTH) AF: 0.00142 AC: 3 AN: 2106

Alfa AF: 0.00138 Hom.: 1

Bravo AF: 0.00145

Asia WGS AF: 0.00520 AC: 18 AN: 3478

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
-	-	1	MEG3-related disorder (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.94
CADD	Benign	0.0050
DANN	Benign	0.68
PhyloP100		-3.2
Mutation Taster		=100/0	polymorphism

Splicing

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

Other links and lift over

dbSNP: rs186345479; hg19: chr14-101315157;