7-99735363-A-C

Variant names:

• chr7-99735363-A-C
• rs11568825
• XR_007059988.1:n.1429-1329A>C

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP4_Strong BS2

The XR_007059988.1(ZSCAN25):​n.1429-1329A>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0251 in 151,636 control chromosomes in the GnomAD database, including 80 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.025 (80 hom., cov: 31)
• Consequence: ZSCAN25 XR_007059988.1 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.81
• Publications: 8 publications found

Genes affected

ZSCAN25 (HGNC:21961): (zinc finger and SCAN domain containing 25) This gene encodes a protein that bears some similarity to zinc finger proteins, which are involved in DNA binding and protein-protein interactions. Multiple alternatively spliced transcript variants have been identified, but the full-length nature for most of them has not been determined. [provided by RefSeq, Jul 2008]

CYP3A7 (HGNC:2640): (cytochrome P450 family 3 subfamily A member 7) This gene encodes a member of the cytochrome P450 superfamily of enzymes, which participate in drug metabolism and the synthesis of cholesterol, steroids and other lipids. This enzyme hydroxylates testosterone and dehydroepiandrosterone 3-sulphate, which is involved in the formation of estriol during pregnancy. This gene is part of a cluster of related genes on chromosome 7q21.1. Naturally-occurring readthrough transcription occurs between this gene and the downstream CYP3A51P pseudogene and is represented by GeneID:100861540. [provided by RefSeq, Jan 2015]

CYP3A7-CYP3A51P (HGNC:51504): (CYP3A7-CYP3A51P readthrough) This locus represents readthrough transcription between the neighboring CYP3A7 (cytochrome P450, family 3, subfamily A, polypeptide 7) and CYP3A51P (cytochrome P450, family 3, subfamily A, polypeptide 51, pseudogene) genes, which are members of the CYP3A gene cluster on chromosome 7. The downstream pseudogene is not known to be independently transcribed. The readthrough transcript includes CYP3A7 exons 1-13 and exons 2 and 13 of the pseudogene. It encodes a CYP3A isoform with a novel C-terminus. This isoform is only expressed in alleles containing a T nucleotide at the -6 position of a splice acceptor in the pseudogene, which enables correct splicing of the upstream CYP3A7 exons to the pseudogene exons. It should be noted that the reference genome sequence represents the CYP3A7_39256 T->A allele, and thus this haplotype is unlikely to produce the readthrough transcript. [provided by RefSeq, Jan 2015]

ACMG classification

Our verdict: Benign. The variant received -8 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.93).
• BS2: High Homozygotes in GnomAd4 at 80 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CYP3A7	NM_000765.5	c.-270T>G		upstream_gene_variant		ENST00000336374.4	NP_000756.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CYP3A7	ENST00000336374.4	c.-270T>G		upstream_gene_variant		1	NM_000765.5	ENSP00000337450.2
CYP3A7	ENST00000467776.1	n.-167T>G		upstream_gene_variant		3

Frequencies

GnomAD3 genomes AF: 0.0252 AC: 3813 AN: 151520 Hom.: 79 Cov.: 31

Gnomad AFR AF: 0.00946

Gnomad AMI AF: 0.00768

Gnomad AMR AF: 0.0272

Gnomad ASJ AF: 0.0275

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.0131

Gnomad FIN AF: 0.0467

Gnomad MID AF: 0.0160

Gnomad NFE AF: 0.0338

Gnomad OTH AF: 0.0293

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.0251 AC: 3813 AN: 151636 Hom.: 80 Cov.: 31 AF XY: 0.0252 AC XY: 1868 AN XY: 74110

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00945 AC: 392 AN: 41474

American (AMR) AF: 0.0271 AC: 413 AN: 15224

Ashkenazi Jewish (ASJ) AF: 0.0275 AC: 95 AN: 3458

East Asian (EAS) AF: 0.00 AC: 0 AN: 5186

South Asian (SAS) AF: 0.0133 AC: 64 AN: 4812

European-Finnish (FIN) AF: 0.0467 AC: 492 AN: 10536

Middle Eastern (MID) AF: 0.0174 AC: 5 AN: 288

European-Non Finnish (NFE) AF: 0.0338 AC: 2284 AN: 67644

Other (OTH) AF: 0.0290 AC: 61 AN: 2102

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.0101 Hom.: 8

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.93
CADD	Benign	7.4
DANN	Benign	0.67
PhyloP100		-1.8
PromoterAI		-0.0062	Neutral

Splicing

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

Other links and lift over

dbSNP: rs11568825; hg19: chr7-99332986; COSMIC: COSV60481142;