chr1-42816516-GT-G

Variant names:

• chr1-42816516-GT-G
• rs1429369162
• NM_199342.4:c.28delA

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PVS1_Strong PM2

The NM_199342.4(SVBP):​c.28delA​(p.Thr10ProfsTer22) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,772 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: SVBP NM_199342.4 frameshift
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.0200
• Publications: 0 publications found

Genes affected

SVBP (HGNC:29204): (small vasohibin binding protein) Enables microtubule binding activity. Involved in axon development; proteolysis; and regulation of metallopeptidase activity. Acts upstream of or within negative regulation of endothelial cell migration; negative regulation of protein ubiquitination; and protein secretion. Located in apical part of cell. [provided by Alliance of Genome Resources, Apr 2022]

TMEM269 (HGNC:52381): (transmembrane protein 269) Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most 50 bp of the penultimate exon, not predicted to undergo nonsense mediated mRNA decay. There are 5 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SVBP	NM_199342.4	c.28delA	p.Thr10ProfsTer22	frameshift_variant	Exon 2 of 3	ENST00000372521.9	NP_955374.1
SVBP	XM_017001226.2	c.28delA	p.Thr10ProfsTer22	frameshift_variant	Exon 2 of 3		XP_016856715.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SVBP	ENST00000372521.9	c.28delA	p.Thr10ProfsTer22	frameshift_variant	Exon 2 of 3	1	NM_199342.4	ENSP00000361599.4
SVBP	ENST00000372522.5	c.28delA	p.Thr10ProfsTer22	frameshift_variant	Exon 2 of 3	3		ENSP00000361600.1
SVBP	ENST00000497437.1	n.127delA		non_coding_transcript_exon_variant	Exon 2 of 3	3
TMEM269	ENST00000421630.6	n.*424-13delT		intron_variant	Intron 10 of 10	5		ENSP00000490287.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251420 AF XY: 0.00000736

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461772 Hom.: 0 Cov.: 30 AF XY: 0.00000275 AC XY: 2 AN XY: 727184

African (AFR) AF: 0.00 AC: 0 AN: 33474

American (AMR) AF: 0.00 AC: 0 AN: 44716

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39678

South Asian (SAS) AF: 0.0000232 AC: 2 AN: 86244

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111946

Other (OTH) AF: 0.00 AC: 0 AN: 60392

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		-0.020
Mutation Taster		=16/184	disease causing (fs/PTC)

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

Other links and lift over

dbSNP: rs1429369162; hg19: chr1-43282187;