Genetic Variant SYT8:p.Arg34Cys (chr11-1835301-C-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001394072.1(SYT8):c.100C>T(p.Arg34Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000538 in 1,599,536 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign 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. R34H) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000053 ( 0 hom. )

Consequence

SYT8
NM_001394072.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.457

Publications

0 publications found

Variant links:

Genes affected

SYT8 (HGNC:19264): (synaptotagmin 8) This gene encodes a member of the synaptotagmin protein family. Synaptotagmins are membrane proteins that are important in neurotransmission and hormone secretion, both of which involve regulated exocytosis. Expression of the encoded protein in human pancreatic islets has been connected to activity of the promoter for the insulin gene, on the same chromosome several hundred kilobases away (PMID: 21336277 and 22928559). This association would link response to gluclose to insulin secretion. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Mar 2014]

SYT8 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.10504654).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001394072.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SYT8	NM_001394072.1	MANE Select	c.100C>T	p.Arg34Cys	missense	Exon 2 of 8	NP_001381001.1	Q8NBV8-4
SYT8	NM_001290332.2		c.145C>T	p.Arg49Cys	missense	Exon 3 of 9	NP_001277261.2
SYT8	NM_001290333.2		c.142C>T	p.Arg48Cys	missense	Exon 3 of 9	NP_001277262.2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SYT8	ENST00000341958.4	TSL:5 MANE Select	c.100C>T	p.Arg34Cys	missense	Exon 2 of 8	ENSP00000343691.3	Q8NBV8-4
SYT8	ENST00000381978.7	TSL:1	c.136C>T	p.Arg46Cys	missense	Exon 3 of 9	ENSP00000371406.3	H0Y3G9
SYT8	ENST00000482118.1	TSL:1	n.100C>T		non_coding_transcript_exon	Exon 2 of 2

Frequencies

GnomAD3 genomes

AF:

0.0000591

AC:

AN:

152190

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

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:

0.000103

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000165

AC:

AN:

242136

AF XY:

0.0000152

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000274

Gnomad OTH exome

AF:

0.000170

GnomAD4 exome

AF:

0.0000532

AC:

AN:

1447346

Hom.:

Cov.:

AF XY:

0.0000613

AC XY:

AN XY:

718072

show subpopulations

African (AFR)

AF:

0.0000301

AC:

AN:

33234

American (AMR)

AF:

0.00

AC:

AN:

44132

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25466

East Asian (EAS)

AF:

0.0000253

AC:

AN:

39452

South Asian (SAS)

AF:

0.00

AC:

AN:

85220

European-Finnish (FIN)

AF:

0.00

AC:

AN:

50838

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5710

European-Non Finnish (NFE)

AF:

0.0000616

AC:

AN:

1103594

Other (OTH)

AF:

0.000117

AC:

AN:

59700

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.483

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000591

AC:

AN:

152190

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74348

show subpopulations

African (AFR)

AF:

0.0000483

AC:

AN:

41440

American (AMR)

AF:

0.00

AC:

AN:

15286

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5192

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10630

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.000103

AC:

AN:

68026

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.514

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000571

Hom.:

Bravo

AF:

0.0000680

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ClinVar

ClinVar submissions

Significance:Uncertain significance

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.43

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.063

Eigen

Benign

-0.96

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.011

LIST_S2

Benign

0.50

M_CAP

Benign

0.068

MetaRNN

Benign

0.11

MetaSVM

Benign

-0.92

MutationAssessor

Benign

1.2

PhyloP100

-0.46

PrimateAI

Benign

0.25

PROVEAN

Pathogenic

-5.7

REVEL

Benign

0.092

Sift

Uncertain

0.0040

Sift4G

Uncertain

0.0040

Polyphen

0.11

Vest4

0.40

MVP

0.37

MPC

0.28

ClinPred

0.19

GERP RS

0.042

PromoterAI

0.028

Neutral

(source)

Varity_R

0.11

gMVP

0.37

Mutation Taster

=86/14

polymorphism

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over