NM_001020658.2:c.1158+1_1158+2dupGT

Variant names:

• chr1-30992387-T-TAC
• rs1553148974
• NM_001020658.2:c.1158+1_1158+2dupGT

Variant summary

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

The NM_001020658.2(PUM1):​c.1158+1_1158+2dupGT variant causes a splice donor, intron change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: PUM1 NM_001020658.2 splice_donor, intron
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 8.87
• Publications: 0 publications found

Genes affected

PUM1 (HGNC:14957): (pumilio RNA binding family member 1) This gene encodes a member of the PUF family, evolutionarily conserved RNA-binding proteins related to the Pumilio proteins of Drosophila and the fem-3 mRNA binding factor proteins of C. elegans. The encoded protein contains a sequence-specific RNA binding domain comprised of eight repeats and N- and C-terminal flanking regions, and serves as a translational regulator of specific mRNAs by binding to their 3' untranslated regions. The evolutionarily conserved function of the encoded protein in invertebrates and lower vertebrates suggests that the human protein may be involved in translational regulation of embryogenesis, and cell development and differentiation. Alternatively spliced transcript variants encoding different isoforms have been described. [provided by RefSeq, Jul 2008]

PUM1 Gene-Disease associations (from GenCC):

• neurodevelopmental disorder with motor abnormalities, seizures, and facial dysmorphism

  Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
• spinocerebellar ataxia 47

  Inheritance: AD Classification: MODERATE, LIMITED Submitted by: Ambry Genetics, Illumina

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

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001020658.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PUM1	NM_001020658.2	MANE Select	c.1158+1_1158+2dupGT		splice_donor intron	N/A	NP_001018494.1
	PUM1	NM_014676.3		c.1158+1_1158+2dupGT		splice_donor intron	N/A	NP_055491.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PUM1	ENST00000426105.7	TSL:1 MANE Select	c.1158+2_1158+3insGT		splice_donor intron	N/A	ENSP00000391723.2
	PUM1	ENST00000373741.8	TSL:1	c.1266+2_1266+3insGT		splice_donor intron	N/A	ENSP00000362846.4
	PUM1	ENST00000257075.9	TSL:1	c.1158+2_1158+3insGT		splice_donor intron	N/A	ENSP00000257075.5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Intellectual disability Uncertain:1

Aug 01, 2017

Institute of Human Genetics, FAU Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Splice donor variant identified in a female patient with developmental delay, normal motor milestones, speech delay, anomalies of palmar creases.

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		8.9

Splicing

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

Other links and lift over

dbSNP: rs1553148974; hg19: chr1-31465234;