Gene Information
Gene NameUNQ732/PRO1418
OrganismHomo sapiens (Human)
Gene Length350
Protein NamesSperm equatorial segment protein 1 (SP-ESP) (Equatorial segment protein) (ESP) (Glycosylated 38 kDa sperm protein C-7/8)
Target NameNA
Target TypeNA
Gene AgeNA
Evolutionary StageNA
AlphaFoldDBQ6UW49
Gene CardSPESP1
Uniprot IDQ6UW49
PfamPF15754
In ASDno
Allosteric PredictionNA
Ortholog in AnimalsNA
OhnologsNA
ParalogsNA
TissueNA
Tissue SpecificityHighly expressed in testis, where it is localized in the acrosome of postmeiotic stages of spermiogenesis (round and elongating spermatids and in ejaculated spermatozoa) (at protein level). Poorly expressed in placenta and fetal lung. {ECO:0000269|PubMed:12773409}.
Pharmacological Animal ModelsNA
Gene Ontology
(biological process)
Gene Ontology
(cellular component)
Gene Ontology
(molecular function)
PDB NA 
DBSNP rs3743091  rs16952684  rs3743093 
Subcellular location [CC]Cytoplasmic vesicle, secretory vesicle, acrosome {ECO:0000269|PubMed:12773409}. Note=Small proacrosomal granules (during the Golgi phase), enlarged acrosomal vesicles (during the cap phase), acrosome (during the elongating phase), equatorial segment of the acrosome (during the maturation phase) (PubMed:12773409). After acrosome reaction localizes to the equatorial segment region in both noncapacitated and capacitated, acrosome-reacted sperm (By similarity). {ECO:0000250|UniProtKB:Q9D5A0, ECO:0000269|PubMed:12773409}.
Mouse PG classificationNA
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