Outer dense fiber protein 2, also known as cenexin, is a protein that in humans is encoded by the ODF2 gene. [5] [6] [7]
The outer dense fibers are cytoskeletal structures that surround the axoneme in the middle piece and principal piece of the sperm tail. The fibers function in maintaining the elastic structure and recoil of the sperm tail as well as in protecting the tail from shear forces during epididymal transport and ejaculation. Defects in the outer dense fibers lead to abnormal sperm morphology and infertility. This gene encodes one of the major outer dense fiber proteins. Multiple protein isoforms are encoded by transcript variants of this gene; however, not all isoforms and variants have been fully described. [7]
Zona pellucida sperm-binding protein 3, also known as zona pellucida glycoprotein 3 (Zp-3) or the sperm receptor, is a ZP module-containing protein that in humans is encoded by the ZP3 gene. ZP3 is the receptor in the zona pellucida which binds sperm at the beginning of fertilization.
Nuclear autoantigenic sperm protein is a protein that in humans is encoded by the NASP gene. Multiple isoforms are encoded by transcript variants of this gene.
Homeobox protein Hox-A7 is a protein that in humans is encoded by the HOXA7 gene.
Homeobox A4, also known as HOXA4, is a protein which in humans is encoded by the HOXA4 gene.
Sodium/potassium-transporting ATPase subunit alpha-4 is an enzyme that in humans is encoded by the ATP1A4 gene.
Sperm-associated antigen 5 is a protein that in humans is encoded by the SPAG5 gene.
Outer dense fiber protein 1 is a protein that in humans is encoded by the ODF1 gene.
Plasma membrane calcium-transporting ATPase 3 is an enzyme that in humans is encoded by the ATP2B3 gene.
Early placenta insulin-like peptide is a protein that in humans is encoded by the INSL4 gene.
Acrosomal protein SP-10 is a protein that in humans is encoded by the ACRV1 gene.
Sperm-associated antigen 8 is a protein that in humans is encoded by the SPAG8 gene.
Zinc finger X-chromosomal protein is a protein that in mammals is encoded by the ZFX gene of the X chromosome.
Cysteine-rich secretory protein 1 is a cysteine-rich secretory protein that in humans is encoded by the CRISP1 gene.
UDP-N-acetylhexosamine pyrophosphorylase is an enzyme that in humans is encoded by the UAP1 gene.
SUN domain-containing protein 5, formerly known as sperm-associated antigen 4-like protein (SPAGL4), is a protein that in humans is encoded by the SUN5 gene.
Polyamine-modulated factor 1-binding protein 1 is a protein that is encoded in humans by the PMFBP1 gene.
Disintegrin and metalloproteinase domain-containing protein 18 is an enzyme that in humans is encoded by the ADAM18 gene.
Adenylyl cyclase 10 also known as ADCY10 is an enzyme that, in humans, is encoded by the ADCY10 gene.
Histone H1oo is a protein that in humans is encoded by the H1FOO gene.
Glutathione peroxidase 5 (GPx-5), also known as epididymal secretory glutathione peroxidase is an enzyme that in humans is encoded by the GPX5 gene.