chr16-89510358-T-A

Variant names:

• chr16-89510358-T-A
• rs3922634
• NM_003119.4:c.184-132T>A

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_003119.4(SPG7):​c.184-132T>A variant causes a intron 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: SPG7 NM_003119.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.348
• Publications: 17 publications found

Genes affected

SPG7 (HGNC:11237): (SPG7 matrix AAA peptidase subunit, paraplegin) This gene encodes a mitochondrial metalloprotease protein that is a member of the AAA family. Members of this protein family share an ATPase domain and have roles in diverse cellular processes including membrane trafficking, intracellular motility, organelle biogenesis, protein folding, and proteolysis. Mutations in this gene cause autosomal recessive spastic paraplegia 7. Two transcript variants encoding distinct isoforms have been identified. [provided by RefSeq, Mar 2014]

SPG7 Gene-Disease associations (from GenCC):

• hereditary spastic paraplegia 7

  Inheritance: AR, AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Laboratory for Molecular Medicine, G2P, Orphanet, Labcorp Genetics (formerly Invitae)
• lateral sclerosis

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SPG7	NM_003119.4	c.184-132T>A		intron_variant	Intron 1 of 16	ENST00000645818.2	NP_003110.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SPG7	ENST00000645818.2	c.184-132T>A		intron_variant	Intron 1 of 16		NM_003119.4	ENSP00000495795.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0 AN: 515966 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 279758

African (AFR) AF: 0.00 AC: 0 AN: 13496

American (AMR) AF: 0.00 AC: 0 AN: 26042

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 18184

East Asian (EAS) AF: 0.00 AC: 0 AN: 31780

South Asian (SAS) AF: 0.00 AC: 0 AN: 54884

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 31880

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 2236

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 308700

Other (OTH) AF: 0.00 AC: 0 AN: 28764

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 34457

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
CADD	Benign	4.8
DANN	Benign	0.35
PhyloP100		0.35
PromoterAI		0.025	Neutral

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: rs3922634; hg19: chr16-89576766;