NM_018418.5:c.19+1G>A

Variant names:

• chr14-88385838-G-A
• rs2075555029
• NM_018418.5:c.19+1G>A

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PVS1 PM2

The NM_018418.5(SPATA7):​c.19+1G>A variant causes a splice donor, intron change. The variant allele was found at a frequency of 0.000000689 in 1,450,658 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: SPATA7 NM_018418.5 splice_donor, intron
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.71
• Publications: 0 publications found

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]

SPATA7 Gene-Disease associations (from GenCC):

• Leber congenital amaurosis 3

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
• Leber congenital amaurosis

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• retinitis pigmentosa

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• severe early-childhood-onset retinal dystrophy

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000296360 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PVS1: Splicing +-2 bp (donor or acceptor) variant, LoF is a know mechanism of disease, No cryptic splice site detected. Exon removal results in frameshift change.
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SPATA7	NM_018418.5	c.19+1G>A		splice_donor_variant, intron_variant	Intron 1 of 11	ENST00000393545.9	NP_060888.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SPATA7	ENST00000393545.9	c.19+1G>A		splice_donor_variant, intron_variant	Intron 1 of 11	1	NM_018418.5	ENSP00000377176.4

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome AF: 6.89e-7 AC: 1 AN: 1450658 Hom.: 0 Cov.: 56 AF XY: 0.00 AC XY: 0 AN XY: 720316

African (AFR) AF: 0.00 AC: 0 AN: 33434

American (AMR) AF: 0.00 AC: 0 AN: 43248

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25836

East Asian (EAS) AF: 0.00 AC: 0 AN: 39298

South Asian (SAS) AF: 0.00 AC: 0 AN: 83994

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51726

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5726

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1107472

Other (OTH) AF: 0.0000167 AC: 1 AN: 59924

GnomAD4 genome Cov.: 34

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.31	D
BayesDel_noAF	Pathogenic	0.20
CADD	Pathogenic	32
DANN	Benign	0.97
Eigen	Pathogenic	0.89
Eigen_PC	Pathogenic	0.68
FATHMM_MKL	Benign	0.74	D
PhyloP100		3.7
GERP RS		3.5
PromoterAI		-0.73	Under-expression
Mutation Taster		=9/91	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.93
SpliceAI score (max)		0.95		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.95		Position offset: -1

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

Other links and lift over

dbSNP: rs2075555029; hg19: chr14-88852182;