14-88437877-T-C

Position:

• chr14-88437877-T-C

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6 BP7 BS1 BS2

The NM_018418.5(SPATA7):​c.1255T>C​(p.Leu419=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00268 in 1,608,652 control chromosomes in the GnomAD database, including 95 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.014 (51 hom., cov: 32)
  • Exomes 𝑓: 0.0015 (44 hom.)
• Consequence: SPATA7 NM_018418.5 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:2
• Conservation: PhyloP100: 2.03

Genes affected

SPATA7 (HGNC:20423): (spermatogenesis associated 7) This gene, originally isolated from testis, is also expressed in retina. Mutations in this gene are associated with Leber congenital amaurosis and juvenile retinitis pigmentosa. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2010]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.64).
• BP6: Variant 14-88437877-T-C is Benign according to our data. Variant chr14-88437877-T-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 534952.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=1, Benign=2}. Variant chr14-88437877-T-C is described in Lovd as [Likely_benign].
• BP7: Synonymous conserved (PhyloP=2.03 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0143 (2170/152268) while in subpopulation AFR AF= 0.0488 (2027/41542). AF 95% confidence interval is 0.047. There are 51 homozygotes in gnomad4. There are 1032 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 51 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SPATA7	NM_018418.5	c.1255T>C	p.Leu419=	synonymous_variant	12/12	ENST00000393545.9	NP_060888.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SPATA7	ENST00000393545.9	c.1255T>C	p.Leu419=	synonymous_variant	12/12	1	NM_018418.5	ENSP00000377176	P2

Frequencies

GnomAD3 genomes AF: 0.0142 AC: 2157 AN: 152150 Hom.: 50 Cov.: 32

Gnomad AFR AF: 0.0486

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00728

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000118

Gnomad OTH AF: 0.0115

GnomAD3 exomes AF: 0.00367 AC: 908 AN: 247576 Hom.: 12 AF XY: 0.00281 AC XY: 376 AN XY: 133708

Gnomad AFR exome AF: 0.0492

Gnomad AMR exome AF: 0.00245

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000169

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000142

Gnomad OTH exome AF: 0.00133

GnomAD4 exome AF: 0.00148 AC: 2149 AN: 1456384 Hom.: 44 Cov.: 32 AF XY: 0.00133 AC XY: 966 AN XY: 723854

Gnomad4 AFR exome AF: 0.0503

Gnomad4 AMR exome AF: 0.00323

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000212

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000928

Gnomad4 OTH exome AF: 0.00329

GnomAD4 genome AF: 0.0143 AC: 2170 AN: 152268 Hom.: 51 Cov.: 32 AF XY: 0.0139 AC XY: 1032 AN XY: 74444

Gnomad4 AFR AF: 0.0488

Gnomad4 AMR AF: 0.00727

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000118

Gnomad4 OTH AF: 0.0114

Alfa AF: 0.00762 Hom.: 11

Bravo AF: 0.0165

Asia WGS AF: 0.00346 AC: 12 AN: 3478

EpiCase AF: 0.000327

EpiControl AF: 0.000296

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1 Benign:2

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Leber congenital amaurosis 3 Benign:2

Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Apr 28, 2017	This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases was too high to be consistent with this variant causing disease. Therefore, this variant is classified as benign. -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 26, 2024	- -

Retinitis pigmentosa Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 28, 2017

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.64
CADD	Benign	7.6
DANN	Benign	0.72

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		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: rs112976233; hg19: chr14-88904221;