1-92834833-G-T

Position:

• chr1-92834833-G-T

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_000969.5(RPL5):​c.244G>T​(p.Glu82Ter) variant causes a stop gained change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: RPL5 NM_000969.5 stop_gained
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 9.98

Genes affected

RPL5 (HGNC:10360): (ribosomal protein L5) Ribosomes, the organelles that catalyze protein synthesis, consist of a small 40S subunit and a large 60S subunit. Together these subunits are composed of four RNA species and approximately 80 structurally distinct proteins. This gene encodes a member of the L18P family of ribosomal proteins and component of the 60S subunit. The encoded protein binds 5S rRNA to form a stable complex called the 5S ribonucleoprotein particle (RNP), which is necessary for the transport of nonribosome-associated cytoplasmic 5S rRNA to the nucleolus for assembly into ribosomes. The encoded protein may also function to inhibit tumorigenesis through the activation of downstream tumor suppressors and the downregulation of oncoprotein expression. Mutations in this gene have been identified in patients with Diamond-Blackfan Anemia (DBA). This gene is co-transcribed with the small nucleolar RNA gene U21, which is located in its fifth intron. As is typical for genes encoding ribosomal proteins, there are multiple processed pseudogenes of this gene dispersed throughout the genome. [provided by RefSeq, Mar 2017]

DIPK1A (HGNC:32213): (divergent protein kinase domain 1A) This gene encodes a member of the FAM69 family of cysteine-rich type II transmembrane proteins. These proteins localize to the endoplasmic reticulum but their specific functions are unknown. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Nov 2011]

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 1-92834833-G-T is Pathogenic according to our data. Variant chr1-92834833-G-T is described in ClinVar as [Pathogenic]. Clinvar id is 100638.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RPL5	NM_000969.5	c.244G>T	p.Glu82Ter	stop_gained	4/8	ENST00000370321.8
DIPK1A	NM_001252273.2	c.475-1799C>A		intron_variant
RPL5	NR_146333.1	n.373G>T		non_coding_transcript_exon_variant	4/8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RPL5	ENST00000370321.8	c.244G>T	p.Glu82Ter	stop_gained	4/8	1	NM_000969.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Diamond-Blackfan anemia 6 Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Aug 01, 2013

- -

Diamond-Blackfan anemia Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Ambry Genetics

May 27, 2014

The p.E82* pathogenic mutation (also known as c.244G>T), located in coding exon 4 of the RPL5 gene, results from a G to T substitution at nucleotide position 244. This changes the amino acid from a to a stop codon within coding exon 4. In one study, this mutation was reported in a mother and daughter with DBA. The 39-year-old mother was diagnosed at 5 years of age and had growth retardation, osteoporosis, thumb abnormalities, and severe hepatic iron overload. Her 10-year-old daughter had intrauterine growth retardation and fetal distress, was diagnosed at birth, and had ventricular septal defect, cleft palate, clinodactyly, Cathie facies, growth retardation, vitamin D deficiency, and severe hepatic iron overload. Both had high erythrocyte adenosine deaminase, and while the mother was steroid responsive the daughter developed secondary steroid resistance (Gerrard G et al. Br J Haematol. 2013;162(4):530-536). In addition to the clinical data presented in the literature, since premature stop codons are typically deleterious in nature, this alteration is interpreted as a disease-causing mutation (ACMG Recommendations for Standards for Interpretation and Reporting of Sequence Variations. Revision 2007. Genet Med. 2008;10:294). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.60	D
BayesDel_noAF	Pathogenic	0.57
CADD	Pathogenic	44
DANN	Uncertain	1.0
Eigen	Pathogenic	1.2
Eigen_PC	Pathogenic	1.1
FATHMM_MKL	Pathogenic	0.98	D
MutationTaster	Benign	1.0	A;A
Vest4		0.91
GERP RS		5.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs587777117; hg19: chr1-93300390;