chr17-9378579-T-G

Position:

• chr17-9378579-T-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_004853.3(STX8):​c.616A>C​(p.Met206Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: STX8 NM_004853.3 missense
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.136

Genes affected

STX8 (HGNC:11443): (syntaxin 8) The gene is a member of the syntaxin family. The encoded protein is involved in protein trafficking from early to late endosomes via vesicle fusion and exocytosis. A related pseudogene has been identified on chromosome 12. Alternative splicing results in multiple transcript variants. [provided by RefSeq, May 2010]

STX8 (HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.05373898).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
STX8	NM_004853.3	c.616A>C	p.Met206Leu	missense_variant	7/8	ENST00000306357.9	NP_004844.1
STX8	XM_011524079.2	c.451A>C	p.Met151Leu	missense_variant	5/6		XP_011522381.1
STX8	NR_033656.2	n.422A>C		non_coding_transcript_exon_variant	5/6
STX8	XR_934120.3	n.*6A>C		downstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
STX8	ENST00000306357.9	c.616A>C	p.Met206Leu	missense_variant	7/8	1	NM_004853.3	ENSP00000305255.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 08, 2024

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.079
BayesDel_addAF	Benign	-0.37	T
BayesDel_noAF	Benign	-0.77
CADD	Benign	0.010
DANN	Benign	0.29
DEOGEN2	Benign	0.054	T;.
Eigen	Benign	-1.9
Eigen_PC	Benign	-1.9
FATHMM_MKL	Benign	0.014	N
LIST_S2	Benign	0.46	T;T
M_CAP	Benign	0.00097	T
MetaRNN	Benign	0.054	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-0.72	N;.
PrimateAI	Benign	0.30	T
PROVEAN	Benign	-0.070	N;.
REVEL	Benign	0.051
Sift	Benign	0.61	T;.
Sift4G	Benign	1.0	T;T
Polyphen		0.0	B;.
Vest4		0.17
MutPred		0.43		Gain of helix (P = 0.0425);.;
MVP		0.040
MPC		0.027
ClinPred		0.016	T
GERP RS		-7.9
Varity_R		0.038
gMVP		0.29

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

Publications

LitVar

Other links and lift over

dbSNP: rs978578485; hg19: chr17-9281896;