Seroatlas · Human Serome Atlas

SPATA31A5

Spermatogenesis-associated protein 31A5

Also known as: FAM75A5, S31A5_HUMAN

Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene

Protein identityUniProt · HPA

UniProt accession: Q5VU36
Gene: SPATA31A5
Ensembl: ENSG00000276581
Chromosome: 9
Canonical length: 1347 aa
Protein class: Predicted membrane proteins
Subcellular location: Acrosome,Equatorial segment

OverviewNCBI Gene

Predicted to be involved in cell differentiation and spermatogenesis. Predicted to be located in membrane. [provided by Alliance of Genome Resources, Jul 2025]

Canonical amino-acid sequenceUniProt

1347 residues, UniProt reviewed canonical sequence.

>Q5VU36|SPATA31A5
     1  MENLPFPLKL LSASSLNAPS STPWVLDIFL TLVFALGFFF LLLPYLSYFR CDDPPSPSPG
    61  KRKCPVGRRR RPRGRMKNHS LRAGRECRRG LEETSDLLSQ LQSLLGPHLD KGDFGQLSGP
   121  DPPGEVGERA PDGASQSSHE PMEDAAPILS PLASPDPQAK HPQDLASTPS PGPMTTSVSS
   181  LSASQPPEPS LPLEHPSPEP PALFPHPPHT PDPLACSLPP PKGFTAPPLR DSTLITPSHC
   241  DSVAFPLGTV PQSLSPHEDL VASVPAISGL GGSNSHVSAS SRWQETARTS CAFNSSVQQD
   301  HLSRHPPETC QMEAGSLFLL SSDGQNVVGI QVTETAKVNI WEEKENVGSF TNRMTPEKHL
   361  NSLRNLAKSL DAEQDTTNPK PFWNMGENSK QLPGPQKLSD PRLWQESFWK NYSQLFWGLP
   421  SLHSESLVAN AWVTDRSYTL QSPPFLFNEM SNVCPIQRET TMSPLLFQAQ PLSHLGPECQ
   481  PFISSTPQFR PTPMAQAEAQ AHLQSSFPVL SPAFPSLIQN TGVACPASQN KVQALSLPET
   541  QHPEWPLLRR QLEGRLALPS RVQKSQDVFS VSTPNLPQES LTSILPENFP VSPELRRQLE
   601  QHIKKWIIQH WGNLGRIQES LDLMQLRDES PGTSQAKGKP SPWQSSMSTG EGSKEAQKVK
   661  FQLERDPCPH LGQILGETPQ NLSRDMKSFP RKVLGVTSEE LERNLRKPLR SDSGSDLLRC
   721  TERTHIENIL KAHMGRNLGQ TNEGLIPVCV RRSWLAVNQA LPVSNTHVKT SNLAAPKSGK
   781  ACVNTAQVLS FLEPCTQQGL GAHIVRFWAK HRWGLPLRVL KPIQCFKLEK VSSLSLTQLA
   841  GPSSATCESG AGSEVEVDMF LRKPPMASLR KQVLTKASDH MPESLLASSP AWKQFQRAPR
   901  GIPSWNDHEP LKPPPAGQEG RWPSKPLTYS LTGSIQQSRS LGAQSSKAGE TREAVPQCRV
   961  PLETCMLANL QATSEDVHGF EAPGTSKSSL HPRVSVSQDP RKLCLMEEVV NEFEPGMATK
  1021  SETQPQVCAA VVLLPDGQAS VVPHASENLV SQVPQGHLQS MPTGNMRASQ ELHDLMAARR
  1081  SKLVHEEPRN PNCQGSCKSQ RPMFPPIHKS EKSRKPNLEK HEERLEGLRT PQLTPVRKTE
  1141  DTHQDEGVQL LPSKKQPPSV SPFGENIKQI FQWIFSKKKS KPAPVTAESQ KTVKNRSRVY
  1201  SSSAEAQGLM TAVGQMLDEK MSLCHARHAS KVNQHKQKFQ APVCGFPCNH RHLFYSEHGR
  1261  ILSYAASSQQ ATLKSQGCPN RDRQIRNQQP LKSVRCNNEQ WGLRHPQILH PKKAVSPVSP
  1321  PQHWPKTSGA SSHHHHCPRH CLLWEGI

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against SPATA31A5 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: Unknown
Secreted: No
Transmembrane segments: 1
Mean surface accessibility (rSASA): 0.69
Highest tissue expression: 1.4 nTPM

Expression across tissuesHPA

Tissue

testis: 1.4 nTPM
adipose tissue: 0 nTPM
adrenal gland: 0 nTPM
amygdala: 0 nTPM
appendix: 0 nTPM
basal ganglia: 0 nTPM

Single-cell type

adipocytes: 0 nCPM
adrenal cortex cells: 0 nCPM
adrenal medulla cells: 0 nCPM
alveolar cells type 1: 0 nCPM
alveolar cells type 2: 0 nCPM
b-cells: 0 nCPM

Immune cell

basophil: 0 nTPM
classical monocyte: 0 nTPM
eosinophil: 0 nTPM
gdT-cell: 0 nTPM
intermediate monocyte: 0 nTPM
MAIT T-cell: 0 nTPM

Brain region

amygdala: 0 nTPM
basal ganglia: 0 nTPM
cerebellum: 0 nTPM
cerebral cortex: 0 nTPM
choroid plexus: 0 nTPM
hippocampal formation: 0 nTPM

Cancer expressionTCGA

Across TCGA tumor cohorts, this protein is over-expressed in roughly 3% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).

OntologyGO

Biological processes

Cellular components

membrane

Protein domainsUniProt · Pfam · InterPro

KeywordsUniProt

Antibody and autoantibody relevanceSeroatlas analysis

Seroatlas reads SPATA31A5 as an antibody target. Whether an autoantibody or antibody against SPATA31A5 could matter depends on whether native SPATA31A5 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

SPATA31A5 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 SPATA31A5 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

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