rs1554651464

chr9-35658024-C-CTCAGCTTCACA

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PP5_Moderate

The 9-35658024-C-CTCAGCTTCACA variant causes a upstream gene change involving the alteration of a non-conserved nucleotide. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency: Genomes: not found (cov: 34)
• Consequence: RMRP NR_003051.3 upstream_gene
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: -11.8

Genes affected

RMRP (HGNC:10031): (RNA component of mitochondrial RNA processing endoribonuclease) This gene encodes the RNA component of mitochondrial RNA processing endoribonuclease, which cleaves mitochondrial RNA at a priming site of mitochondrial DNA replication. This RNA also interacts with the telomerase reverse transcriptase catalytic subunit to form a distinct ribonucleoprotein complex that has RNA-dependent RNA polymerase activity and produces double-stranded RNAs that can be processed into small interfering RNA. Mutations in this gene are associated with cartilage-hair hypoplasia.[provided by RefSeq, Mar 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PP5: Variant 9-35658024-C-CTCAGCTTCACA is Pathogenic according to our data. Variant chr9-35658024-C-CTCAGCTTCACA is described in ClinVar as [Pathogenic]. Clinvar id is 2778505.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RMRP	NR_003051.3			upstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RMRP	ENST00000363046.1			upstream_gene_variant

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Cov.: 0

GnomAD4 genome Cov.: 34

Bravo AF: 0.0000113

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Anauxetic dysplasia Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Invitae

Sep 11, 2023

For these reasons, this variant has been classified as Pathogenic. While functional studies for this variant have not been reported, experimental analyses using patient derived cells, as well as in vitro transfection studies, have shown that promoter insertions result in silencing of RMRP transcription and reduced expression of the gene product (PMID: 11207361, 16254002). While this particular variant has not been reported in the literature, it is located in the promoter region between the TATA box and the transcription initiation site, and other insertions and duplications immediately upstream of the coding sequence have been reported in individuals affected with cartilage-hair hypoplasia-anauxetic dysplasia (CHH-AD) spectrum disorders (PMID: 16244706, 11207361, 12107819). This variant is not present in population databases (gnomAD no frequency). This variant occurs in the RMRP gene, which encodes an RNA molecule that does not result in a protein product. -

Computational scores

Source: dbNSFP v4.3

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs1554651464; hg19: chr9-35658021;