20-49117821-G-A

Variant names:

• chr20-49117821-G-A
• NM_017453.4:c.1465C>T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_017453.4(STAU1):​c.1465C>T​(p.Pro489Ser) variant causes a missense 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: STAU1 NM_017453.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.60

Genes affected

STAU1 (HGNC:11370): (staufen double-stranded RNA binding protein 1) Staufen is a member of the family of double-stranded RNA (dsRNA)-binding proteins involved in the transport and/or localization of mRNAs to different subcellular compartments and/or organelles. These proteins are characterized by the presence of multiple dsRNA-binding domains which are required to bind RNAs having double-stranded secondary structures. The human homologue of staufen encoded by STAU, in addition contains a microtubule- binding domain similar to that of microtubule-associated protein 1B, and binds tubulin. The STAU gene product has been shown to be present in the cytoplasm in association with the rough endoplasmic reticulum (RER), implicating this protein in the transport of mRNA via the microtubule network to the RER, the site of translation. [provided by RefSeq, Apr 2020]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
STAU1	NM_017453.4	c.1465C>T	p.Pro489Ser	missense_variant	Exon 11 of 14	ENST00000371856.7	NP_059347.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
STAU1	ENST00000371856.7	c.1465C>T	p.Pro489Ser	missense_variant	Exon 11 of 14	1	NM_017453.4	ENSP00000360922.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Sep 02, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1465C>T (p.P489S) alteration is located in exon 11 (coding exon 9) of the STAU1 gene. This alteration results from a C to T substitution at nucleotide position 1465, causing the proline (P) at amino acid position 489 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.27	D
BayesDel_noAF	Pathogenic	0.15
CADD	Pathogenic	29
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.57	D;T;.;.;.;.;.;T
Eigen	Pathogenic	0.86
Eigen_PC	Pathogenic	0.86
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Pathogenic	0.98	D;D;D;.;.;D;.;D
M_CAP	Uncertain	0.12	D
MetaRNN	Uncertain	0.54	D;D;D;D;D;D;D;D
MetaSVM	Uncertain	0.48	D
MutationAssessor	Uncertain	2.9	M;.;.;.;.;.;.;.
PrimateAI	Uncertain	0.76	T
PROVEAN	Pathogenic	-5.6	D;.;D;D;D;D;D;D
REVEL	Pathogenic	0.76
Sift	Benign	0.031	D;.;D;D;D;D;D;D
Sift4G	Benign	0.097	T;T;T;T;T;T;T;T
Polyphen		1.0	D;.;.;.;.;.;.;.
Vest4		0.79
MutPred		0.66		Gain of phosphorylation at P489 (P = 0.0477);.;.;.;.;.;.;.;
MVP		0.55
MPC		1.3
ClinPred		0.99	D
GERP RS		5.6
Varity_R		0.74
gMVP		0.69

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		Details are displayed if max score is > 0.2

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr20-47734358; COSMIC: COSV61463214;