rs878853178

Variant names:

• chr9-35658015-A-AACCACGTCCTCAGCTTC
• rs878853178
• ENST00000363046.2:n.4_5insGAAGCTGAGGACGTGGT

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PP5_Moderate

The ENST00000363046.2(RMRP):​n.4_5insGAAGCTGAGGACGTGGT 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 0.0000275 in 690,820 control chromosomes in the GnomAD database, with no homozygous occurrence. It is difficult to determine the true allele frequency of this variant because it is of type INS_BIG, and the frequency of such variant types in population databases may be underestimated and unreliable. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 34)
  • Exomes 𝑓: 0.000033 (0 hom.)
• Consequence: RMRP ENST00000363046.2 non_coding_transcript_exon
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: -1.48
• Publications: 0 publications found

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]

RMRP Gene-Disease associations (from GenCC):

• cartilage-hair hypoplasia

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, Myriad Women’s Health, G2P

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PP5: Variant 9-35658015-A-AACCACGTCCTCAGCTTC is Pathogenic according to our data. Variant chr9-35658015-A-AACCACGTCCTCAGCTTC is described in ClinVar as Pathogenic. ClinVar VariationId is 14221.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RMRP	NR_003051.4	n.4_5insGAAGCTGAGGACGTGGT		non_coding_transcript_exon_variant	Exon 1 of 1	ENST00000363046.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RMRP	ENST00000363046.2	n.4_5insGAAGCTGAGGACGTGGT		non_coding_transcript_exon_variant	Exon 1 of 1	6	NR_003051.4

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152134 Hom.: 0 Cov.: 34

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000192

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000156 AC: 2 AN: 128286 AF XY: 0.0000285

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000192

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000334 AC: 18 AN: 538686 Hom.: 0 Cov.: 0 AF XY: 0.0000276 AC XY: 8 AN XY: 290162

African (AFR) AF: 0.00 AC: 0 AN: 15540

American (AMR) AF: 0.00 AC: 0 AN: 34358

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19812

East Asian (EAS) AF: 0.000535 AC: 17 AN: 31804

South Asian (SAS) AF: 0.00 AC: 0 AN: 62396

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 33090

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 2406

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 309344

Other (OTH) AF: 0.0000334 AC: 1 AN: 29936

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152134 Hom.: 0 Cov.: 34 AF XY: 0.00 AC XY: 0 AN XY: 74332

African (AFR) AF: 0.00 AC: 0 AN: 41426

American (AMR) AF: 0.00 AC: 0 AN: 15278

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3466

East Asian (EAS) AF: 0.000192 AC: 1 AN: 5196

South Asian (SAS) AF: 0.00 AC: 0 AN: 4832

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10626

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 314

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 67990

Other (OTH) AF: 0.00 AC: 0 AN: 2094

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Metaphyseal chondrodysplasia, McKusick type Pathogenic:1

Dec 15, 2003

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Anauxetic dysplasia Pathogenic:1

Jun 01, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant occurs in the RMRP gene, which encodes an RNA molecule that does not result in a protein product. This variant is present in population databases (no rsID available, gnomAD 0.02%). This variant has been observed in individual(s) with RMRP-related conditions (PMID: 14608646, 16832578). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. This variant is also known as c.-15_2dup. Studies have shown that this variant alters RMRP gene expression (PMID: 17937437). For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		-1.5

Splicing

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

Other links and lift over

dbSNP: rs878853178; hg19: chr9-35658012;