rs1555261871

Variant names:

• chr13-36326636-T-C
• rs1555261871
• NM_015087.5:c.1227A>G

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2 BP4_Strong BP6_Moderate BP7

The NM_015087.5(SPART):​c.1227A>G​(p.Pro409Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: SPART NM_015087.5 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.486
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• Troyer syndrome

  Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet

ACMG classification

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

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.48).
• BP6: Variant 13-36326636-T-C is Benign according to our data. Variant chr13-36326636-T-C is described in ClinVar as Likely_benign. ClinVar VariationId is 461201.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=0.486 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015087.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SPART	NM_015087.5	MANE Select	c.1227A>G	p.Pro409Pro	synonymous	Exon 5 of 9	NP_055902.1
	SPART	NM_001142294.2		c.1227A>G	p.Pro409Pro	synonymous	Exon 5 of 9	NP_001135766.1
	SPART	NM_001142295.2		c.1227A>G	p.Pro409Pro	synonymous	Exon 5 of 9	NP_001135767.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SPART	ENST00000438666.7	TSL:1 MANE Select	c.1227A>G	p.Pro409Pro	synonymous	Exon 5 of 9	ENSP00000406061.2
	SPART	ENST00000451493.5	TSL:1	c.1227A>G	p.Pro409Pro	synonymous	Exon 5 of 9	ENSP00000414147.1
	SPART	ENST00000494062.2	TSL:1	c.1227A>G	p.Pro409Pro	synonymous	Exon 6 of 10	ENSP00000473599.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	Troyer syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.48
CADD	Benign	11
DANN	Benign	0.66
PhyloP100		0.49
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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

Other links and lift over

dbSNP: rs1555261871; hg19: chr13-36900773;