NM_004782.4:c.-8C>G

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_004782.4(SNAP29):c.-8C>G variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00193 in 1,594,494 control chromosomes in the GnomAD database, including 48 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.010 ( 22 hom., cov: 33)

Exomes 𝑓: 0.0011 ( 26 hom. )

Consequence

SNAP29
NM_004782.4 5_prime_UTR

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: -0.205

Publications

1 publications found

Variant links:

Genes affected

SNAP29 (HGNC:11133): (synaptosome associated protein 29) This gene, a member of the SNAP25 gene family, encodes a protein involved in multiple membrane trafficking steps. Two other members of this gene family, SNAP23 and SNAP25, encode proteins that bind a syntaxin protein and mediate synaptic vesicle membrane docking and fusion to the plasma membrane. The protein encoded by this gene binds tightly to multiple syntaxins and is localized to intracellular membrane structures rather than to the plasma membrane. While the protein is mostly membrane-bound, a significant fraction of it is found free in the cytoplasm. Use of multiple polyadenylation sites has been noted for this gene. [provided by RefSeq, Jul 2008]

SNAP29 links:

PI4KA (HGNC:8983): (phosphatidylinositol 4-kinase alpha) This gene encodes a phosphatidylinositol (PI) 4-kinase which catalyzes the first committed step in the biosynthesis of phosphatidylinositol 4,5-bisphosphate. The mammalian PI 4-kinases have been classified into two types, II and III, based on their molecular mass, and modulation by detergent and adenosine. The protein encoded by this gene is a type III enzyme that is not inhibited by adenosine. Alternative splicing results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Apr 2018]

PI4KA Gene-Disease associations (from GenCC):

polymicrogyria, perisylvian, with cerebellar hypoplasia and arthrogryposis
Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), PanelApp Australia, G2P

PI4KA links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.69).

BP6

Variant 22-20859103-C-G is Benign according to our data. Variant chr22-20859103-C-G is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 340827.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.0103 (1567/152292) while in subpopulation AFR AF = 0.0352 (1464/41562). AF 95% confidence interval is 0.0337. There are 22 homozygotes in GnomAd4. There are 762 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 22 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SNAP29	NM_004782.4 link	c.-8C>G		5_prime_UTR_variant	Exon 1 of 5	ENST00000215730.12	NP_004773.1	O95721

Ensembl

Gene	Transcript	HGVSc	Effect	Exon rank	TSL	MANE	Protein	UniProt
SNAP29	ENST00000215730.12 link	c.-8C>G	5_prime_UTR_variant	Exon 1 of 5	1	NM_004782.4	ENSP00000215730.6	O95721
SNAP29	ENST00000490458.1 link	n.23C>G	non_coding_transcript_exon_variant	Exon 1 of 2	2
PI4KA	ENST00000449120.1 link	c.-19+20G>C	intron_variant	Intron 1 of 3	4		ENSP00000402437.1	C9JLI1

Frequencies

GnomAD3 genomes

AF:

0.0103

AC:

1562

AN:

152174

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0352

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00491

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000132

Gnomad OTH

AF:

0.00812

GnomAD2 exomes

AF:

0.00236

AC:

530

AN:

224710

AF XY:

0.00173

show subpopulations

Gnomad AFR exome

AF:

0.0345

Gnomad AMR exome

AF:

0.00163

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000616

Gnomad OTH exome

AF:

0.000732

GnomAD4 exome

AF:

0.00105

AC:

1517

AN:

1442202

Hom.:

Cov.:

AF XY:

0.000885

AC XY:

635

AN XY:

717574

show subpopulations

African (AFR)

AF:

0.0360

AC:

1200

AN:

33292

American (AMR)

AF:

0.00212

AC:

AN:

43786

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25686

East Asian (EAS)

AF:

0.00

AC:

AN:

39430

South Asian (SAS)

AF:

0.000118

AC:

AN:

84492

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51084

Middle Eastern (MID)

AF:

0.000522

AC:

AN:

5744

European-Non Finnish (NFE)

AF:

0.0000519

AC:

AN:

1099026

Other (OTH)

AF:

0.00258

AC:

154

AN:

59662

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.491

Heterozygous variant carriers

150

225

300

375

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

132

176

220

<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:

0.0103

AC:

1567

AN:

152292

Hom.:

Cov.:

AF XY:

0.0102

AC XY:

762

AN XY:

74468

show subpopulations

African (AFR)

AF:

0.0352

AC:

1464

AN:

41562

American (AMR)

AF:

0.00490

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5176

South Asian (SAS)

AF:

0.000414

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10612

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.000132

AC:

AN:

68018

Other (OTH)

AF:

0.00803

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.489

Heterozygous variant carriers

140

209

279

349

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

100

<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:

0.00270

Hom.:

Bravo

AF:

0.0113

Asia WGS

AF:

0.000867

AC:

AN:

3474

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

Feb 02, 2017

Athena Diagnostics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Dec 01, 2016

Genetic Services Laboratory, University of Chicago

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:2

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Aug 07, 2018

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

CEDNIK syndrome

Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.69

CADD

Benign

3.9

(source)

DANN

Benign

0.55

PhyloP100

-0.20

PromoterAI

0.086

Neutral

(source)

RBP_binding_hub_radar

0.92

RBP_regulation_power_radar

3.1

Mutation Taster

=300/0

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over