Gene Information
Gene NameSPAG4
OrganismHomo sapiens (Human)
Gene Length437
Protein NamesSperm-associated antigen 4 protein (Outer dense fiber-associated protein SPAG4) (SUN domain-containing protein 4)
Target NameNA
Target TypeNA
Gene Age168 ( ENSG00000061656 )
Evolutionary StageEukaryota
AlphaFoldDBQ9NPE6
Gene CardSPAG4
Uniprot IDQ9NPE6
PfamPF07738
In ASDno
Allosteric Predictionno (-0.537259548)
Ortholog in AnimalsAlpaca_ SPAG4 ( ortholog_one2one )
Dog_ SPAG4 ( ortholog_one2one )
GuineaPig_ SPAG4 ( ortholog_one2one )
Macaque_ SPAG4 ( ortholog_one2one )
Mouse_ Spag4 ( ortholog_one2one )
Pig_ SPAG4 ( ortholog_one2one )
Rat_ Spag4 ( ortholog_one2one )
Rabbit_ SPAG4 ( ortholog_one2one )
OhnologsNA
ParalogsSUN3, SUN5, SUN1, SUN2
TissueNA
Tissue SpecificityPredominantly epressed in testis. Expressed in ejaculated spermatozoa (at protein level). {ECO:0000269|PubMed:25775403}.
Pharmacological Animal ModelsNA
Gene Ontology
(biological process)
Gene Ontology
(cellular component)
Gene Ontology
(molecular function)
PDB NA 
DBSNP NA 
Subcellular location [CC]Membrane {ECO:0000305};
Multi-pass membrane protein {ECO:0000305}. Cytoplasm, cytoskeleton {ECO:0000250|UniProtKB:O55034}. Cytoplasm, cytoskeleton, flagellum axoneme {ECO:0000250|UniProtKB:O55034}. Nucleus envelope {ECO:0000250|UniProtKB:Q9JJF2}. Nucleus inner membrane {ECO:0000250|UniProtKB:Q9JJF2}. Note=In spermatids, it is localized in the transient manchette and in the axoneme of elongating spermatids and epididymal sperm (By similarity). Colocalized with SEPT12 at the nuclear periphery in round spermatids, at sperm neck in elongated spermatids and at midpiece regions in ejaculated spermatozoa (PubMed:25775403). {ECO:0000250|UniProtKB:O55034, ECO:0000269|PubMed:25775403}.
Mouse PG classificationNA
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