SPG7
Mitochondrial inner membrane m-AAA protease component paraplegin
Also known as: CAR, CMAR, SPG5C, SPG7_HUMAN
Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene
Protein identityUniProt · HPA
- UniProt accession
- Q9UQ90
- Gene
- SPG7
- Ensembl
- ENSG00000197912
- Chromosome
- 16
- Canonical length
- 795 aa
- Protein class
- Disease related genes, Enzymes, Human disease related genes, Potential drug targets, Predicted intracellular proteins, Predicted membrane proteins
OverviewNCBI Gene
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]
Canonical amino-acid sequenceUniProt
795 residues, UniProt reviewed canonical sequence.
>Q9UQ90|SPG7
1 MAVLLLLLRA LRRGPGPGPR PLWGPGPAWS PGFPARPGRG RPYMASRPPG DLAEAGGRAL
61 QSLQLRLLTP TFEGINGLLL KQHLVQNPVR LWQLLGGTFY FNTSRLKQKN KEKDKSKGKA
121 PEEDEEERRR RERDDQMYRE RLRTLLVIAV VMSLLNALST SGGSISWNDF VHEMLAKGEV
181 QRVQVVPESD VVEVYLHPGA VVFGRPRLAL MYRMQVANID KFEEKLRAAE DELNIEAKDR
241 IPVSYKRTGF FGNALYSVGM TAVGLAILWY VFRLAGMTGR EGGFSAFNQL KMARFTIVDG
301 KMGKGVSFKD VAGMHEAKLE VREFVDYLKS PERFLQLGAK VPKGALLLGP PGCGKTLLAK
361 AVATEAQVPF LAMAGPEFVE VIGGLGAARV RSLFKEARAR APCIVYIDEI DAVGKKRSTT
421 MSGFSNTEEE QTLNQLLVEM DGMGTTDHVI VLASTNRADI LDGALMRPGR LDRHVFIDLP
481 TLQERREIFE QHLKSLKLTQ SSTFYSQRLA ELTPGFSGAD IANICNEAAL HAAREGHTSV
541 HTLNFEYAVE RVLAGTAKKS KILSKEEQKV VAFHESGHAL VGWMLEHTEA VMKVSITPRT
601 NAALGFAQML PRDQHLFTKE QLFERMCMAL GGRASEALSF NEVTSGAQDD LRKVTRIAYS
661 MVKQFGMAPG IGPISFPEAQ EGLMGIGRRP FSQGLQQMMD HEARLLVAKA YRHTEKVLQD
721 NLDKLQALAN ALLEKEVINY EDIEALIGPP PHGPKKMIAP QRWIDAQREK QDLGEEETEE
781 TQQPPLGGEE PTWPKLocalizationUniProt · AlphaFold · HPA
Whether an antibody against SPG7 can act on the native protein depends on physical access: surface and secreted proteins are reachable by circulating antibodies, intracellular proteins usually are not.
- Antibody reachability
- Other membrane
- Secreted
- No
- Transmembrane segments
- 2
- Mean surface accessibility (rSASA)
- 0.39
- Highest tissue expression
- 49 nTPM
Expression across tissuesHPA
Tissue
- skeletal muscle: 49 nTPM
- heart muscle: 33 nTPM
- tongue: 29 nTPM
- liver: 22 nTPM
- cerebral cortex: 22 nTPM
- adrenal gland: 22 nTPM
Single-cell type
- leydig cells: 152 nCPM
- enterocytes: 145 nCPM
- proximal tubule cells: 143 nCPM
- thymocytes: 138 nCPM
- oligodendrocyte progenitor cells: 132 nCPM
- somatotrophs: 129 nCPM
Immune cell
- basophil: 4.5 nTPM
- eosinophil: 3.9 nTPM
- NK-cell: 3.7 nTPM
- naive B-cell: 3.4 nTPM
- naive CD4 T-cell: 3.1 nTPM
- neutrophil: 2.9 nTPM
Brain region
- cerebellum: 25 nTPM
- pons: 23 nTPM
- cerebral cortex: 23 nTPM
- white matter: 22 nTPM
- medulla oblongata: 22 nTPM
- hippocampal formation: 22 nTPM
DiseaseUniProt · ClinVar · IEDB · PubMed
Four sources answering four different questions about SPG7.
Disease | AllUniProt
Conditions SPG7 is implicated in, by any mechanism.
- Spastic paraplegia 7, autosomal recessive (SPG7) MIM:607259
Disease | GeneticClinVar
193 pathogenic / likely-pathogenic of 1,249 ClinVar records.
Conditions with pathogenic or likely-pathogenic variants.
- Hereditary spastic paraplegia 7
- Hereditary spastic paraplegia
- SPG7-related disorder
- Inborn genetic diseases
- Retinal dystrophy
Genetic constraint and essentialitygnomAD · DepMap
Does the body need this protein intact? Low LOEUF or a strong DepMap dependency means loss or blockade of the protein is likely to be felt.
- gnomAD LOEUF (loss-of-function intolerance)
- 1.65
- gnomAD pLI
- 0
- gnomAD missense Z
- -0.87
- DepMap mean gene effect
- 0.03
- DepMap dependency class
- none
Cancer expressionTCGA
Across TCGA tumor cohorts, this protein is over-expressed in roughly 4% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).
OntologyGO
Biological processes
- anterograde axonal transport
- mitochondrial outer membrane permeabilization involved in programmed cell death
- mitochondrial protein processing
- nervous system development
- proteolysis
- regulation of calcium import into the mitochondrion
- regulation of mitochondrial membrane permeability
Molecular functions
- ATP binding
- ATP hydrolysis activity
- ATP-dependent peptidase activity
- metalloendopeptidase activity
- peptidase activity
- unfolded protein binding
- zinc ion binding
Cellular components
Protein domainsUniProt · Pfam · InterPro
- Peptidase M41
- AAA+ ATPase domain
- ATPase, AAA-type, core
- ATP-dependent zinc metalloprotease, FtsH
- Peptidase M41, FtsH extracellular
- P-loop containing nucleoside triphosphate hydrolase
- Peptidase M41-like
- AAA ATPase, AAA+ lid domain
- ATP-dependent Zinc Metalloprotease
- ATPase family associated with various cellular activities (AAA)
- Peptidase family M41
- FtsH Extracellular
- AAA+ lid domain
KeywordsUniProt
InteractionsUniProt · HPA
Protein binding partners of SPG7 in the human serome: UniProt-annotated complex subunits plus reported interactors. Each links to its own Seroatlas record.
Antibody and autoantibody relevanceSeroatlas analysis
Seroatlas reads SPG7 as an antibody target. Whether an autoantibody or antibody against SPG7 could matter depends on whether native SPG7 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.
SPG7 is annotated as predominantly intracellular. Intracellular proteins are common autoantibody markers, becoming visible to the immune system after cell injury or altered processing, but are usually markers of disease rather than direct drivers.
Annotation status
The present source text does not explicitly label SPG7 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.
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