Genetic Variant NM_153816.6:c.2596C>T (chr6-85513857-G-A) – ACMG Classification: Pathogenic (11 pts)

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PVS1PM2PP5

The NM_153816.6(SNX14):c.2596C>T(p.Gln866*) variant causes a stop gained change. The variant allele was found at a frequency of 0.00000205 in 1,460,550 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

SNX14
NM_153816.6 stop_gained

Scores

Clinical Significance

Pathogenic no assertion criteria provided P:1

Conservation

PhyloP100: 4.08

Publications

1 publications found

Variant links:

Genes affected

SNX14 (HGNC:14977): (sorting nexin 14) This gene encodes a member of the sorting nexin family. Members of this family have a phox (PX) phosphoinositide binding domain and are involved in intracellular trafficking. The encoded protein also contains a regulator of G protein signaling (RGS) domain. Regulator of G protein signaling family members are regulatory molecules that act as GTPase activating proteins for G alpha subunits of heterotrimeric G proteins. Alternate splicing results in transcript variants encoding distinct isoforms. [provided by RefSeq, Jul 2014]

SNX14 Gene-Disease associations (from GenCC):

autosomal recessive spinocerebellar ataxia 20
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics, PanelApp Australia

SNX14 links:

ENSG00000271793 (HGNC:):

ENSG00000271793 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 11 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 6-85513857-G-A is Pathogenic according to our data. Variant chr6-85513857-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 190314.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SNX14	NM_153816.6 link	c.2596C>T	p.Gln866*	stop_gained	Exon 26 of 29	ENST00000314673.8	NP_722523.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein
SNX14	ENST00000314673.8 link	c.2596C>T	p.Gln866*	stop_gained	Exon 26 of 29	1	NM_153816.6	ENSP00000313121.3
ENSG00000271793	ENST00000682083.1 link	n.*2506C>T		non_coding_transcript_exon_variant	Exon 37 of 40			ENSP00000506859.1
ENSG00000271793	ENST00000682083.1 link	n.*2506C>T		3_prime_UTR_variant	Exon 37 of 40			ENSP00000506859.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000205

AC:

AN:

1460550

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726604

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33432

American (AMR)

AF:

0.00

AC:

AN:

44662

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26110

East Asian (EAS)

AF:

0.00

AC:

AN:

39602

South Asian (SAS)

AF:

0.00

AC:

AN:

86070

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52928

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5752

European-Non Finnish (NFE)

AF:

0.00000270

AC:

AN:

1111636

Other (OTH)

AF:

0.00

AC:

AN:

60358

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000096912), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.358

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

Cov.:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

LINK: link

Submissions by phenotype

Autosomal recessive spinocerebellar ataxia 20

Pathogenic:1

Nov 06, 2014

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.63

BayesDel_noAF

Pathogenic

0.62

CADD

Pathogenic

(source)

DANN

Uncertain

0.99

Eigen

Pathogenic

0.92

Eigen_PC

Pathogenic

0.78

FATHMM_MKL

Uncertain

0.95

PhyloP100

4.1

Vest4

0.44

GERP RS

5.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Mutation Taster

=0/200

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.38

Details are displayed if max score is > 0.2

DS_AL_spliceai

0.38

Position offset: 38

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

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over