NM_014855.3:c.1773C>T

Variant names:

• chr7-4789897-C-T
• rs372922535
• NM_014855.3:c.1773C>T

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6 BP7 BS1 BS2

The NM_014855.3(AP5Z1):​c.1773C>T​(p.Tyr591Tyr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000432 in 1,550,942 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.00072 (1 hom., cov: 32)
  • Exomes 𝑓: 0.00040 (2 hom.)
• Consequence: AP5Z1 NM_014855.3 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:2
• Conservation: PhyloP100: 0.356

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]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.84).
• BP6: Variant 7-4789897-C-T is Benign according to our data. Variant chr7-4789897-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 478581.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=2}. Variant chr7-4789897-C-T is described in Lovd as [Likely_benign].
• BP7: Synonymous conserved (PhyloP=0.356 with no splicing effect.
• BS1: Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.000716 (109/152208) while in subpopulation AMR AF= 0.00373 (57/15298). AF 95% confidence interval is 0.00295. There are 1 homozygotes in gnomad4. There are 60 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High Homozygotes in GnomAdExome4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AP5Z1	NM_014855.3	c.1773C>T	p.Tyr591Tyr	synonymous_variant	Exon 14 of 17	ENST00000649063.2	NP_055670.1
AP5Z1	NM_001364858.1	c.1305C>T	p.Tyr435Tyr	synonymous_variant	Exon 13 of 16		NP_001351787.1
AP5Z1	XM_047421098.1	c.1437C>T	p.Tyr479Tyr	synonymous_variant	Exon 12 of 15		XP_047277054.1
AP5Z1	NR_157345.1	n.1904C>T		non_coding_transcript_exon_variant	Exon 14 of 17

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AP5Z1	ENST00000649063.2	c.1773C>T	p.Tyr591Tyr	synonymous_variant	Exon 14 of 17		NM_014855.3	ENSP00000497815.1

Frequencies

GnomAD3 genomes AF: 0.000717 AC: 109 AN: 152090 Hom.: 1 Cov.: 32

Gnomad AFR AF: 0.0000242

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00373

Gnomad ASJ AF: 0.00346

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000414

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.000500

Gnomad OTH AF: 0.000957

GnomAD3 exomes AF: 0.000749 AC: 115 AN: 153532 Hom.: 0 AF XY: 0.000781 AC XY: 64 AN XY: 81942

Gnomad AFR exome AF: 0.000126

Gnomad AMR exome AF: 0.00153

Gnomad ASJ exome AF: 0.00427

Gnomad EAS exome AF: 0.000272

Gnomad SAS exome AF: 0.000528

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000338

Gnomad OTH exome AF: 0.00116

GnomAD4 exome AF: 0.000401 AC: 561 AN: 1398734 Hom.: 2 Cov.: 32 AF XY: 0.000435 AC XY: 300 AN XY: 689998

Gnomad4 AFR exome AF: 0.000789

Gnomad4 AMR exome AF: 0.00111

Gnomad4 ASJ exome AF: 0.00490

Gnomad4 EAS exome AF: 0.0000837

Gnomad4 SAS exome AF: 0.000505

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000228

Gnomad4 OTH exome AF: 0.000914

GnomAD4 genome AF: 0.000716 AC: 109 AN: 152208 Hom.: 1 Cov.: 32 AF XY: 0.000806 AC XY: 60 AN XY: 74402

Gnomad4 AFR AF: 0.0000241

Gnomad4 AMR AF: 0.00373

Gnomad4 ASJ AF: 0.00346

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000414

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000500

Gnomad4 OTH AF: 0.000947

Alfa AF: 0.000657 Hom.: 0

Bravo AF: 0.000669

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:2

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Hereditary spastic paraplegia 48 Uncertain:1 Benign:1

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. -

Jan 23, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hereditary spastic paraplegia Uncertain:1

Oct 02, 2017

Genome Diagnostics Laboratory, The Hospital for Sick Children

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided Benign:1

Jan 01, 2023

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

AP5Z1: BP4, BP7 -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Benign	1.4
DANN	Benign	0.70
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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

LitVar

Other links and lift over

dbSNP: rs372922535; hg19: chr7-4829528;