rs727502868

Positions:

• chr1-231352611-TA-T

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PVS1_Strong PM2 PP5

The NM_032018.7(SPRTN):​c.723del​(p.Lys241AsnfsTer9) variant causes a frameshift, splice region change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: SPRTN NM_032018.7 frameshift, splice_region
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 3.32

Genes affected

SPRTN (HGNC:25356): (SprT-like N-terminal domain) The protein encoded by this gene may play a role in DNA repair during replication of damaged DNA. This protein recruits valosin containing protein (p97) to stalled DNA replication forks where it may prevent excessive translesional DNA synthesis and limit the number of DNA-damage induced mutations. It may also be involved in replication-related G2/M-checkpoint regulation. Deficiency of a similar protein in mouse causes chromosomal instability and progeroid phenotypes. Mutations in this gene have been associated with Ruijs-Aalfs syndrome (RJALS). Alternatively spliced transcript variants have been identified. [provided by RefSeq, Mar 2015]

ACMG classification

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.51 CDS is truncated, and there are 1 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 1-231352611-TA-T is Pathogenic according to our data. Variant chr1-231352611-TA-T is described in ClinVar as [Pathogenic]. Clinvar id is 162628.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr1-231352611-TA-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SPRTN	NM_032018.7	c.723del	p.Lys241AsnfsTer9	frameshift_variant, splice_region_variant	5/5	ENST00000295050.12
SPRTN	XM_006711818.4	c.594del	p.Lys198AsnfsTer9	frameshift_variant, splice_region_variant	4/4
SPRTN	NM_001010984.4	c.*1008del		3_prime_UTR_variant	4/4
SPRTN	NM_001261462.3	c.*1008del		3_prime_UTR_variant	3/3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SPRTN	ENST00000295050.12	c.723del	p.Lys241AsnfsTer9	frameshift_variant, splice_region_variant	5/5	1	NM_032018.7	P1
SPRTN	ENST00000391858.8	c.*1008del		3_prime_UTR_variant	4/4	1
SPRTN	ENST00000366644.3	c.411del	p.Lys137AsnfsTer9	frameshift_variant, splice_region_variant	6/6	5
SPRTN	ENST00000469904.1	n.522del		splice_region_variant, non_coding_transcript_exon_variant	3/3	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Progeroid features-hepatocellular carcinoma predisposition syndrome Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Nov 01, 2014

- -

Computational scores

Source: dbNSFP v4.3

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.16		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: rs527236212; hg19: chr1-231488357;