rs566333309

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_StrongBS1_Supporting

The NM_014855.3(AP5Z1):c.1334C>T(p.Pro445Leu) variant causes a missense change. The variant allele was found at a frequency of 0.000197 in 1,553,290 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00020 ( 0 hom. )

Consequence

AP5Z1
NM_014855.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 4.40

Publications

0 publications found

Variant links:

Genes affected

AP5Z1 (HGNC:22197): (adaptor related protein complex 5 subunit zeta 1) This gene was identified by genome-wide screen for genes involved in homologous recombination DNA double-strand break repair (HR-DSBR). The encoded protein was found in a complex with other proteins that have a role in HR-DSBR. Knockdown of this gene reduced homologous recombination, and mutations in this gene were found in patients with spastic paraplegia. It was concluded that this gene likely encodes a helicase (PMID:20613862). [provided by RefSeq, Jan 2011]

AP5Z1 Gene-Disease associations (from GenCC):

hereditary spastic paraplegia
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
hereditary spastic paraplegia 48
Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Genomics England PanelApp, Ambry Genetics, Labcorp Genetics (formerly Invitae), Orphanet

AP5Z1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.009223163).

BS1

Variant frequency is greater than expected in population eas. GnomAd4 allele frequency = 0.000131 (20/152292) while in subpopulation EAS AF = 0.00329 (17/5174). AF 95% confidence interval is 0.00209. There are 0 homozygotes in GnomAd4. There are 10 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
AP5Z1	NM_014855.3 link	c.1334C>T	p.Pro445Leu	missense_variant	Exon 11 of 17	ENST00000649063.2	NP_055670.1
AP5Z1	NM_001364858.1 link	c.866C>T	p.Pro289Leu	missense_variant	Exon 10 of 16		NP_001351787.1
AP5Z1	XM_047421098.1 link	c.998C>T	p.Pro333Leu	missense_variant	Exon 9 of 15		XP_047277054.1
AP5Z1	NR_157345.1 link	n.1465C>T		non_coding_transcript_exon_variant	Exon 11 of 17

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AP5Z1	ENST00000649063.2 link	c.1334C>T	p.Pro445Leu	missense_variant	Exon 11 of 17		NM_014855.3	ENSP00000497815.1

Frequencies

GnomAD3 genomes

AF:

0.000131

AC:

AN:

152174

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00328

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000170

AC:

AN:

158414

AF XY:

0.000131

show subpopulations

Gnomad AFR exome

AF:

0.000119

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00228

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000204

AC:

286

AN:

1400998

Hom.:

Cov.:

AF XY:

0.000208

AC XY:

144

AN XY:

691488

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

31764

American (AMR)

AF:

0.00

AC:

AN:

36216

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25190

East Asian (EAS)

AF:

0.00728

AC:

262

AN:

35996

South Asian (SAS)

AF:

0.00

AC:

AN:

79378

European-Finnish (FIN)

AF:

0.00

AC:

AN:

47840

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5566

European-Non Finnish (NFE)

AF:

0.0000120

AC:

AN:

1080932

Other (OTH)

AF:

0.000189

AC:

AN:

58116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.491

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:

0.000131

AC:

AN:

152292

Hom.:

Cov.:

AF XY:

0.000134

AC XY:

AN XY:

74460

show subpopulations

African (AFR)

AF:

0.0000481

AC:

AN:

41570

American (AMR)

AF:

0.0000654

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00329

AC:

AN:

5174

South Asian (SAS)

AF:

0.00

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10628

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68014

Other (OTH)

AF:

0.00

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.493

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:

0.0000712

Hom.:

Bravo

AF:

0.000113

ExAC

AF:

0.0000733

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hereditary spastic paraplegia 48

Uncertain:2

Aug 23, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 445 of the AP5Z1 protein (p.Pro445Leu). This variant is present in population databases (rs566333309, gnomAD 0.2%). This variant has not been reported in the literature in individuals affected with AP5Z1-related conditions. ClinVar contains an entry for this variant (Variation ID: 360326). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant is not likely to affect RNA splicing. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Uncertain significance

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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

not specified

Uncertain:1

Nov 29, 2024

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: AP5Z1 c.1334C>T (p.Pro445Leu) results in a non-conservative amino acid change in the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.00017 in 158414 control chromosomes (gnomAD). This frequency is not significantly higher than estimated for a pathogenic variant in AP5Z1 causing Hereditary Spastic Paraplegia 48, allowing no conclusion about variant significance. c.1334C>T has been reported in the literature without strong evidence for or against pathogenicity (example: Wang_2024) . This report does not provide unequivocal conclusions about association of the variant with hereditary spastic paraplegia 48. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publication has been ascertained in the context of this evaluation (PMID: 38292225). ClinVar contains an entry for this variant (Variation ID: 360326). Based on the evidence outlined above, the variant was classified as uncertain significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.17

BayesDel_addAF

Benign

-0.43

BayesDel_noAF

Benign

-0.40

CADD

Benign

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.087

T;T

Eigen

Benign

-0.24

Eigen_PC

Benign

-0.20

FATHMM_MKL

Uncertain

0.86

LIST_S2

Uncertain

0.92

.;D

M_CAP

Benign

0.052

MetaRNN

Benign

0.0092

T;T

MetaSVM

Benign

-0.72

MutationAssessor

Uncertain

2.0

M;M

PhyloP100

4.4

PrimateAI

Benign

0.31

PROVEAN

Uncertain

-2.9

D;.

REVEL

Benign

0.093

Sift

Benign

0.060

T;.

Sift4G

Benign

0.068

T;.

Polyphen

0.13

B;B

Vest4

0.43

MutPred

0.29

Loss of glycosylation at P445 (P = 0.0227);Loss of glycosylation at P445 (P = 0.0227);

MVP

0.25

ClinPred

0.073

GERP RS

5.0

Varity_R

0.058

gMVP

0.45

Mutation Taster

=95/5

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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