14-100881146-G-C

Variant names:

• chr14-100881146-G-C
• rs202003846
• NM_001134888.3:c.3643C>G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001134888.3(RTL1):​c.3643C>G​(p.Arg1215Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. 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. R1215H) has been classified as Benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: RTL1 NM_001134888.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.957

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 Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.07900277).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RTL1	NM_001134888.3	c.3643C>G	p.Arg1215Gly	missense_variant	Exon 4 of 4	ENST00000649591.1	NP_001128360.1
RTL1	NM_001425285.1	c.3643C>G	p.Arg1215Gly	missense_variant	Exon 3 of 3		NP_001412214.1
MIR431	NR_029965.1	n.*26G>C		downstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RTL1	ENST00000649591.1	c.3643C>G	p.Arg1215Gly	missense_variant	Exon 4 of 4		NM_001134888.3	ENSP00000497482.1
MIR493HG	ENST00000637474.1	n.109-8503G>C		intron_variant	Intron 2 of 18	5
MIR431	ENST00000385266.1	n.*26G>C		downstream_gene_variant		6

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 89

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.35	T
BayesDel_noAF	Benign	-0.75
CADD	Benign	4.8
DANN	Benign	0.79
DEOGEN2	Benign	0.11	T;T
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.2
FATHMM_MKL	Benign	0.023	N
LIST_S2	Benign	0.32	.;T
M_CAP	Benign	0.0074	T
MetaRNN	Benign	0.079	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.0	L;L
PrimateAI	Benign	0.30	T
PROVEAN	Benign	1.5	.;N
REVEL	Benign	0.095
Sift	Benign	0.38	.;T
Sift4G	Benign	0.38	.;T
Vest4		0.041
MutPred		0.40		Gain of catalytic residue at L1214 (P = 5e-04);Gain of catalytic residue at L1214 (P = 5e-04);
MVP		0.12
MPC		0.77
ClinPred		0.066	T
GERP RS		-2.0
Varity_R		0.043
gMVP		0.50

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

LitVar

Other links and lift over

dbSNP: rs202003846; hg19: chr14-101347483;