chr22-20859106-G-A

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.-5G>A 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 1,596,848 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:4

Conservation

PhyloP100: 0.0470

Publications

0 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=-0.65).

BP6

Variant 22-20859106-G-A is Benign according to our data. Variant chr22-20859106-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 340828.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 (1566/152316) while in subpopulation AFR AF = 0.0352 (1464/41570). AF 95% confidence interval is 0.0337. There are 22 homozygotes in GnomAd4. There are 761 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

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004782.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SNAP29	NM_004782.4	MANE Select	c.-5G>A		5_prime_UTR	Exon 1 of 5	NP_004773.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein
SNAP29	ENST00000215730.12	TSL:1 MANE Select	c.-5G>A	5_prime_UTR	Exon 1 of 5	ENSP00000215730.6
SNAP29	ENST00000880968.1		c.-5G>A	5_prime_UTR	Exon 1 of 5	ENSP00000551027.1
SNAP29	ENST00000880966.1		c.-5G>A	5_prime_UTR	Exon 2 of 6	ENSP00000551025.1

Frequencies

GnomAD3 genomes

AF:

0.0103

AC:

1561

AN:

152198

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0352

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00484

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:

0.00813

GnomAD2 exomes

AF:

0.00237

AC:

535

AN:

225384

AF XY:

0.00174

show subpopulations

Gnomad AFR exome

AF:

0.0346

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:

0.0000614

Gnomad OTH exome

AF:

0.000730

GnomAD4 exome

AF:

0.00105

AC:

1521

AN:

1444532

Hom.:

Cov.:

AF XY:

0.000885

AC XY:

636

AN XY:

718676

show subpopulations

African (AFR)

AF:

0.0361

AC:

1200

AN:

33282

American (AMR)

AF:

0.00217

AC:

AN:

43830

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25702

East Asian (EAS)

AF:

0.00

AC:

AN:

39442

South Asian (SAS)

AF:

0.000118

AC:

AN:

84610

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51144

Middle Eastern (MID)

AF:

0.000522

AC:

AN:

5750

European-Non Finnish (NFE)

AF:

0.0000527

AC:

AN:

1101018

Other (OTH)

AF:

0.00259

AC:

155

AN:

59754

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.491

Heterozygous variant carriers

158

237

316

395

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:

1566

AN:

152316

Hom.:

Cov.:

AF XY:

0.0102

AC XY:

761

AN XY:

74488

show subpopulations

African (AFR)

AF:

0.0352

AC:

1464

AN:

41570

American (AMR)

AF:

0.00484

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.000414

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.000132

AC:

AN:

68020

Other (OTH)

AF:

0.00804

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.486

Heterozygous variant carriers

139

208

278

347

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:

0.00524

Hom.:

Bravo

AF:

0.0113

Asia WGS

AF:

0.000867

AC:

AN:

3474

ClinVar

ClinVar submissions as Germline

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (2)

CEDNIK syndrome (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.65

CADD

Benign

5.6

(source)

DANN

Benign

0.80

PhyloP100

0.047

PromoterAI

0.067

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over