chr13-36335756-T-C

Position:

chr13-36335756-T-C

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_StrongBP6BP7BS1BS2

The NM_015087.5(SPART):c.75A>G(p.Leu25=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0012 in 1,614,062 control chromosomes in the GnomAD database, including 19 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 0.0012 ( 3 hom., cov: 32)

Exomes 𝑓: 0.0012 ( 16 hom. )

Consequence

SPART
NM_015087.5 synonymous

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:5

Conservation

PhyloP100: -1.05

Variant links:

Genes affected

SPART (HGNC:18514): (spartin) This gene encodes a protein containing a MIT (Microtubule Interacting and Trafficking molecule) domain, and is implicated in regulating endosomal trafficking and mitochondria function. The protein localizes to mitochondria and partially co-localizes with microtubules. Stimulation with epidermal growth factor (EGF) results in protein translocation to the plasma membrane, and the protein functions in the degradation and intracellular trafficking of EGF receptor. Multiple alternatively spliced variants, encoding the same protein, have been identified. Mutations associated with this gene cause autosomal recessive spastic paraplegia 20 (Troyer syndrome). [provided by RefSeq, Nov 2008]

SPART links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -14 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.87).

BP6

Variant 13-36335756-T-C is Benign according to our data. Variant chr13-36335756-T-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 215884.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=3, Benign=2, Uncertain_significance=1}.

BP7

Synonymous conserved (PhyloP=-1.05 with no splicing effect.

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00116 (176/152316) while in subpopulation NFE AF= 0.000911 (62/68020). AF 95% confidence interval is 0.000729. There are 3 homozygotes in gnomad4. There are 86 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 3 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SPART	NM_015087.5 linkuse as main transcript	c.75A>G	p.Leu25=	synonymous_variant	2/9	ENST00000438666.7	NP_055902.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SPART	ENST00000438666.7 linkuse as main transcript	c.75A>G	p.Leu25=	synonymous_variant	2/9	1	NM_015087.5	ENSP00000406061	P1

Frequencies

GnomAD3 genomes

AF:

0.00117

AC:

178

AN:

152198

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000458

Gnomad ASJ

AF:

0.0233

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.0253

Gnomad NFE

AF:

0.000911

Gnomad OTH

AF:

0.00431

GnomAD3 exomes

AF:

0.00153

AC:

384

AN:

250978

Hom.:

AF XY:

0.00146

AC XY:

198

AN XY:

135636

show subpopulations

Gnomad AFR exome

AF:

0.000185

Gnomad AMR exome

AF:

0.000666

Gnomad ASJ exome

AF:

0.0200

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00116

Gnomad OTH exome

AF:

0.00262

GnomAD4 exome

AF:

0.00120

AC:

1758

AN:

1461746

Hom.:

Cov.:

AF XY:

0.00121

AC XY:

879

AN XY:

727168

show subpopulations

Gnomad4 AFR exome

AF:

0.00102

Gnomad4 AMR exome

AF:

0.000514

Gnomad4 ASJ exome

AF:

0.0209

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000243

Gnomad4 FIN exome

AF:

0.0000375

Gnomad4 NFE exome

AF:

0.000746

Gnomad4 OTH exome

AF:

0.00268

GnomAD4 genome

AF:

0.00116

AC:

176

AN:

152316

Hom.:

Cov.:

AF XY:

0.00115

AC XY:

AN XY:

74478

show subpopulations

Gnomad4 AFR

AF:

0.000240

Gnomad4 AMR

AF:

0.000458

Gnomad4 ASJ

AF:

0.0233

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000911

Gnomad4 OTH

AF:

0.00426

Alfa

AF:

0.00255

Hom.:

Bravo

AF:

0.00114

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.00169

EpiControl

AF:

0.00261

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:5

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Benign:3

Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Jul 01, 2024	SPART: BP4, BP7 -
Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 29, 2024	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Jan 27, 2021	- -

Troyer syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 27, 2017

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

not specified

Benign:1

Benign, criteria provided, single submitter

clinical testing

Athena Diagnostics

Jan 15, 2021

- -

Hereditary spastic paraplegia

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Genome Diagnostics Laboratory, The Hospital for Sick Children

Jul 11, 2017

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.87

CADD

Benign

3.3

DANN

Benign

0.46

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over