Genetic Variant SPOUT1:p.Tyr339* (chr9-128823792-G-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_016390.4(SPOUT1):c.1017C>A(p.Tyr339*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000124 in 1,608,550 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

SPOUT1
NM_016390.4 stop_gained

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.155

Variant links:

Genes affected

SPOUT1 (HGNC:26933): (SPOUT domain containing methyltransferase 1) Enables miRNA binding activity. Involved in maintenance of centrosome location and production of miRNAs involved in gene silencing by miRNA. Located in kinetochore; mitotic spindle; and spindle pole centrosome. [provided by Alliance of Genome Resources, Apr 2022]

SPOUT1 links:

ENSG00000286112 (HGNC:):

ENSG00000286112 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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
SPOUT1	NM_016390.4 link	c.1017C>A	p.Tyr339*	stop_gained	Exon 11 of 12	ENST00000361256.10	NP_057474.2	Q5T280
KYAT1-SPOUT1	NM_001414398.1 link	c.2364C>A	p.Tyr788*	stop_gained	Exon 22 of 23		NP_001401327.1
KYAT1-SPOUT1	NR_182310.1 link	n.2960C>A		non_coding_transcript_exon_variant	Exon 24 of 25
KYAT1-SPOUT1	NR_182311.1 link	n.2928C>A		non_coding_transcript_exon_variant	Exon 24 of 25

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SPOUT1	ENST00000361256.10 link	c.1017C>A	p.Tyr339*	stop_gained	Exon 11 of 12	1	NM_016390.4	ENSP00000354812.5	Q5T280
ENSG00000286112	ENST00000651925 link	c.*2056C>A		3_prime_UTR_variant	Exon 28 of 29			ENSP00000498386.1	A0A494C066
SPOUT1	ENST00000467582.1 link	c.155+280C>A		intron_variant	Intron 2 of 2	2		ENSP00000473640.1	R4GNG4
SPOUT1	ENST00000480366.1 link	n.580C>A		non_coding_transcript_exon_variant	Exon 5 of 6	2

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152160

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

6.87e-7

AC:

AN:

1456390

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

724000

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152160

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74320

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jun 10, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1017C>A (p.Y339*) alteration, located in exon 11 (coding exon 11) of the SPOUT1 gene, consists of a C to A substitution at nucleotide position 1017. This changes the amino acid from a tyrosine (Y) to a stop codon at amino acid position 339. This alteration occurs at the 3' terminus of the SPOUT1 gene, is not expected to trigger nonsense-mediated mRNA decay, and only impacts the last 10% of the protein. The exact functional effect of this alteration is unknown. Additionally, the clinical validity of this gene-disease association is limited. 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

BayesDel_addAF

Pathogenic

0.42

BayesDel_noAF

Pathogenic

0.37

CADD

Uncertain

DANN

Uncertain

0.98

Eigen

Benign

-0.18

Eigen_PC

Benign

-0.55

FATHMM_MKL

Uncertain

0.83

Vest4

0.34

ClinPred

0.75

GERP RS

-8.2

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.64

Details are displayed if max score is > 0.2

DS_DG_spliceai

0.48

Position offset: 4

DS_DL_spliceai

0.64

Position offset: -45

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over