NM_001134888.3:c.3982C>A

Variant names:

• chr14-100880807-G-T
• NM_001134888.3:c.3982C>A

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_001134888.3(RTL1):​c.3982C>A​(p.Arg1328Arg) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000143 in 1,398,444 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: not found (cov: 30)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: RTL1 NM_001134888.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.138

Genes affected

RTL1 (HGNC:14665): (retrotransposon Gag like 1) This gene is a retrotransposon-derived, paternally expressed imprinted gene that is highly expressed at the late fetal stage in both the fetus and placenta. It has an overlapping maternally expressed antisense transcript, which contains several microRNAs targeting the transcripts of this gene through an RNA interference (RNAi) mechanism. This gene is essential for maintenance of the fetal capillaries. [provided by RefSeq, Jul 2009]

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

MIR431 (HGNC:32027): (microRNA 431) 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]

ACMG classification

Verdict is Likely_benign. Variant got -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).
• BP7: Synonymous conserved (PhyloP=0.138 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RTL1	NM_001134888.3	c.3982C>A	p.Arg1328Arg	synonymous_variant	Exon 4 of 4	ENST00000649591.1	NP_001128360.1
RTL1	NM_001425285.1	c.3982C>A	p.Arg1328Arg	synonymous_variant	Exon 3 of 3		NP_001412214.1
MIR431	NR_029965.1	n.-200G>T		upstream_gene_variant
MIR431	unassigned_transcript_2364	n.-219G>T		upstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RTL1	ENST00000649591.1	c.3982C>A	p.Arg1328Arg	synonymous_variant	Exon 4 of 4		NM_001134888.3	ENSP00000497482.1
MIR493HG	ENST00000637474.1	n.109-8842G>T		intron_variant	Intron 2 of 18	5
MIR431	ENST00000385266.1	n.-200G>T		upstream_gene_variant		6

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome AF: 0.00000143 AC: 2 AN: 1398444 Hom.: 0 Cov.: 43 AF XY: 0.00000145 AC XY: 1 AN XY: 689764

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000185

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 30

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
CADD	Benign	4.4
DANN	Benign	0.79

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: chr14-101347144;