Genetic Variant NM_001134659.1:c.527C>T (chr3-139005742-G-A) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001134659.1(PRR23A):c.527C>T(p.Ala176Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,112 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict 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: 31)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

PRR23A
NM_001134659.1 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -1.05

Variant links:

Genes affected

PRR23A (HGNC:37172): (proline rich 23A)

PRR23A links:

MRPS22 (HGNC:14508): (mitochondrial ribosomal protein S22) Mammalian mitochondrial ribosomal proteins are encoded by nuclear genes and help in protein synthesis within the mitochondrion. Mitochondrial ribosomes (mitoribosomes) consist of a small 28S subunit and a large 39S subunit. They have an estimated 75% protein to rRNA composition compared to prokaryotic ribosomes, where this ratio is reversed. Another difference between mammalian mitoribosomes and prokaryotic ribosomes is that the latter contain a 5S rRNA. Among different species, the proteins comprising the mitoribosome differ greatly in sequence, and sometimes in biochemical properties, which prevents easy recognition by sequence homology. This gene encodes a 28S subunit protein that does not seem to have a counterpart in prokaryotic and fungal-mitochondrial ribosomes. This gene lies telomeric of and is transcribed in the opposite direction from the forkhead box L2 gene. A pseudogene corresponding to this gene is found on chromosome Xq. [provided by RefSeq, Jul 2008]

MRPS22 links:

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ACMG classification

Classification made for transcript

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 (MetaRNN=0.047092497).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PRR23A	NM_001134659.1 link	c.527C>T	p.Ala176Val	missense_variant	Exon 1 of 1	ENST00000383163.4	NP_001128131.1	A6NEV1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PRR23A	ENST00000383163.4 link	c.527C>T	p.Ala176Val	missense_variant	Exon 1 of 1	6	NM_001134659.1	ENSP00000372649.2		A6NEV1
MRPS22	ENST00000495075.5 link	c.-496G>A		upstream_gene_variant		1		ENSP00000418008.1		P82650-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461112

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726788

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.36

BayesDel_noAF

Benign

-0.75

CADD

Benign

2.0

DANN

Benign

0.97

DEOGEN2

Benign

0.0051

Eigen

Benign

-1.5

Eigen_PC

Benign

-1.6

FATHMM_MKL

Benign

0.0020

LIST_S2

Benign

0.55

M_CAP

Benign

0.0026

MetaRNN

Benign

0.047

MetaSVM

Benign

-0.99

MutationAssessor

Benign

1.5

PrimateAI

Benign

0.36

PROVEAN

Benign

-0.34

REVEL

Benign

0.021

Sift

Benign

0.72

Sift4G

Benign

1.0

Polyphen

0.049

Vest4

0.024

MutPred

0.51

Loss of helix (P = 0.0558);

MVP

0.014

MPC

1.2

ClinPred

0.070

GERP RS

-5.8

Varity_R

0.020

gMVP

0.072

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

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over