Nuclear autoantigenic sperm protein is a protein that in humans is encoded by the NASP gene. [5] [6] Multiple isoforms are encoded by transcript variants of this gene.
This gene encodes a histone H1 binding protein that is involved in transporting histones into the nucleus of dividing cells. [7] The somatic form is expressed in all mitotic cells, is localized to the nucleus, and is coupled to the cell cycle. The testicular form is expressed in embryonic tissues, tumor cells, and the testis. In male germ cells, this protein is localized to the cytoplasm of primary spermatocytes, the nucleus of spermatids, and the periacrosomal region of mature spermatozoa. [6]
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 transcription factor Y subunit beta is a protein that in humans is encoded by the NFYB gene.
Immunocontraception is the use of an animal's immune system to prevent it from fertilizing offspring. Contraceptives of this type are not currently approved for human use.
Histone H2B type 2-E is a protein that in humans is encoded by the HIST2H2BE gene.
Histone H1.1 is a protein that in humans is encoded by the HIST1H1A gene.
Sperm surface protein Sp17 is a protein that in humans is encoded by the SPA17 gene.
Zona pellucida sperm-binding protein 2 is a protein that in humans is encoded by the ZP2 gene.
Histone H2B type 1-A is a protein that in humans is encoded by the HIST1H2BA gene.
Histone H1.2 is a protein that in humans is encoded by the HIST1H1C gene.
Outer dense fiber protein 1 is a protein that in humans is encoded by the ODF1 gene.
Calcium/calmodulin-dependent 3',5'-cyclic nucleotide phosphodiesterase 1A is an enzyme that in humans is encoded by the PDE1A gene.
Acrosomal protein SP-10 is a protein that in humans is encoded by the ACRV1 gene.
DNA-binding protein RFX2 is a protein that in humans is encoded by the RFX2 gene.
Sperm-associated antigen 8 is a protein that in humans is encoded by the SPAG8 gene.
Sperm acrosome membrane-associated protein 3 is a protein that in humans is encoded by the SPACA3 gene. It may be involved in adhesion to the egg before the egg is fertilized.
Cysteine-rich secretory protein 1 is a cysteine-rich secretory protein that in humans is encoded by the CRISP1 gene.
Sperm protein associated with the nucleus on the X chromosome A is a protein that in humans is encoded by the SPANXA1 gene.
Polypyrimidine tract-binding protein 1 is a protein that in humans is encoded by the PTBP1 gene.
Eppin is a protein that in humans is encoded by the SPINLW1 gene.
Histone H1oo is a protein that in humans is encoded by the H1FOO gene.