17-75262228-T-G

Position:

• chr17-75262228-T-G

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_015971.4(MRPS7):​c.83+245T>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0492 in 639,092 control chromosomes in the GnomAD database, including 4,133 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.11 (2829 hom., cov: 33)
  • Exomes 𝑓: 0.029 (1304 hom.)
• Consequence: MRPS7 NM_015971.4 intron
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -0.719

Genes affected

MRPS7 (HGNC:14499): (mitochondrial ribosomal protein S7) 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. In the prokaryotic ribosome, the comparable protein is thought to play an essential role in organizing the 3' domain of the 16 S rRNA in the vicinity of the P- and A-sites. Pseudogenes corresponding to this gene are found on chromosomes 8p and 12p. [provided by RefSeq, Jul 2008]

GGA3 (HGNC:17079): (golgi associated, gamma adaptin ear containing, ARF binding protein 3) This gene encodes a member of the Golgi-localized, gamma adaptin ear-containing, ARF-binding (GGA) family. This family includes ubiquitous coat proteins that regulate the trafficking of proteins between the trans-Golgi network and the lysosome. These proteins share an amino-terminal VHS domain which mediates sorting of the mannose 6-phosphate receptors at the trans-Golgi network. They also contain a carboxy-terminal region with homology to the ear domain of gamma-adaptins. Multiple alternatively spliced transcript variants have been identified in this gene. [provided by RefSeq, Feb 2010]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.83).
• BP6: Variant 17-75262228-T-G is Benign according to our data. Variant chr17-75262228-T-G is described in ClinVar as [Benign]. Clinvar id is 671366.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.35 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MRPS7	NM_015971.4	c.83+245T>G		intron_variant		ENST00000245539.11	NP_057055.2
GGA3	NM_001172703.3	c.-177+54A>C		intron_variant			NP_001166174.1
GGA3	NM_001172704.3	c.-228+54A>C		intron_variant			NP_001166175.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MRPS7	ENST00000245539.11	c.83+245T>G		intron_variant		1	NM_015971.4	ENSP00000245539	P1

Frequencies

GnomAD3 genomes AF: 0.114 AC: 17391 AN: 152156 Hom.: 2823 Cov.: 33

Gnomad AFR AF: 0.355

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0913

Gnomad ASJ AF: 0.00922

Gnomad EAS AF: 0.0776

Gnomad SAS AF: 0.0869

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.0570

Gnomad NFE AF: 0.00293

Gnomad OTH AF: 0.104

GnomAD4 exome AF: 0.0288 AC: 14006 AN: 486818 Hom.: 1304 Cov.: 6 AF XY: 0.0300 AC XY: 7627 AN XY: 254624

Gnomad4 AFR exome AF: 0.360

Gnomad4 AMR exome AF: 0.0719

Gnomad4 ASJ exome AF: 0.00920

Gnomad4 EAS exome AF: 0.0605

Gnomad4 SAS exome AF: 0.0820

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00279

Gnomad4 OTH exome AF: 0.0438

GnomAD4 genome AF: 0.114 AC: 17427 AN: 152274 Hom.: 2829 Cov.: 33 AF XY: 0.113 AC XY: 8403 AN XY: 74464

Gnomad4 AFR AF: 0.355

Gnomad4 AMR AF: 0.0911

Gnomad4 ASJ AF: 0.00922

Gnomad4 EAS AF: 0.0778

Gnomad4 SAS AF: 0.0863

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00294

Gnomad4 OTH AF: 0.103

Alfa AF: 0.0482 Hom.: 315

Bravo AF: 0.130

Asia WGS AF: 0.109 AC: 380 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:2

Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Jun 16, 2018	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
CADD	Benign	7.2
DANN	Benign	0.67

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: rs9908904; hg19: chr17-73258309;