1-114099229-C-A

Position:

• chr1-114099229-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_001253772.2(SYT6):​c.1229G>T​(p.Arg410Leu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R410W) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SYT6 NM_001253772.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.00

Genes affected

SYT6 (HGNC:18638): (synaptotagmin 6) The protein encoded by this gene belongs to the synaptotagmin family. Synaptotagmins share a common domain structure that includes a transmembrane domain and a cytoplasmic region composed of 2 C2 domains, and are involved in calcium-dependent exocytosis of synaptic vesicles. This protein has been shown to be a key component of the secretory machinery involved in acrosomal exocytosis. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Dec 2011]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.851

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SYT6	NM_001253772.2	c.1229G>T	p.Arg410Leu	missense_variant	5/8	ENST00000610222.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SYT6	ENST00000610222.3	c.1229G>T	p.Arg410Leu	missense_variant	5/8	5	NM_001253772.2	P1

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

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 08, 2024

The c.974G>T (p.R325L) alteration is located in exon 5 (coding exon 4) of the SYT6 gene. This alteration results from a G to T substitution at nucleotide position 974, causing the arginine (R) at amino acid position 325 to be replaced by a leucine (L). 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	0.88
BayesDel_addAF	Pathogenic	0.20	D
BayesDel_noAF	Uncertain	0.050
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Benign	0.31	.;.;.;T;.
Eigen	Pathogenic	0.76
Eigen_PC	Pathogenic	0.76
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.94	.;.;D;D;D
M_CAP	Benign	0.059	D
MetaRNN	Pathogenic	0.85	D;D;D;D;D
MetaSVM	Uncertain	-0.11	T
MutationAssessor	Uncertain	2.1	.;.;.;M;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.87	D
PROVEAN	Pathogenic	-5.4	.;.;D;.;.
REVEL	Uncertain	0.60
Sift	Uncertain	0.0010	.;.;D;.;.
Sift4G	Uncertain	0.0070	D;D;D;D;.
Polyphen		1.0	.;.;.;D;.
Vest4		0.72
MutPred		0.67		.;.;.;Loss of MoRF binding (P = 0.0578);Loss of MoRF binding (P = 0.0578);
MVP		0.92
MPC		0.60
ClinPred		1.0	D
GERP RS		5.8
Varity_R		0.72
gMVP		0.59

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-114641851;