1-39883756-G-C

Variant names:

• chr1-39883756-G-C
• rs61781270
• NR_183424.1:n.272+335G>C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NR_183424.1(MYCL-AS1):​n.272+335G>C variant causes a intron 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MYCL-AS1 NR_183424.1 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.277

Genes affected

MYCL-AS1 (HGNC:40386): (MYCL antisense RNA 1)

TRIT1 (HGNC:20286): (tRNA isopentenyltransferase 1) This gene encodes a protein that that is targeted to the mitochondrion and modifies transfer RNAs (tRNAs) by adding a dimethylallyl group onto the adenine at position 37. This modification is important for maintaining the correct reading frame during protein translation. This gene is considered a tumor suppressor and its expression can decrease cell growth. Alternative splicing results in multiple transcripts variants, most of which are likely non-functional. [provided by RefSeq, Aug 2015]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.79).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYCL-AS1	NR_183424.1	n.272+335G>C		intron_variant	Intron 1 of 2
MYCL-AS1	NR_183425.1	n.35+572G>C		intron_variant	Intron 1 of 2
TRIT1	NM_001312691.1	c.-265C>G		upstream_gene_variant			NP_001299620.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TRIT1	ENST00000372818.5	c.-265C>G		upstream_gene_variant		1		ENSP00000361905.1
TRIT1	ENST00000495175.6	n.-265C>G		upstream_gene_variant		1		ENSP00000474264.1

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.79
CADD	Benign	8.1
DANN	Benign	0.93

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs61781270; hg19: chr1-40349428;