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A structure in the head of a spermatozoon that contains acid hydrolases, and is concerned with the breakdown of the outer membrane of the ovum during fertilization. It lies just beneath the plasma membrane and is derived from the lysosome. A heterodimeric protein complex of protein C inhibitor and acrosin; complex formation inhibits the protease activity of acrosin. A vesicle formed of membrane or protein, found in the cytoplasm of a cell. Any macromolecular complex composed of two or more polypeptide subunits, which may or may not be identical. Protein complexes may have other associated non-protein prosthetic groups, such as nucleotides, metal ions or other small molecules. Any constituent part of the cytoplasm, all of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures. Any constituent part of cytoplasmic vesicle, a vesicle formed of membrane or protein, found in the cytoplasm of a cell. Double layer of lipid molecules that encloses all cells, and, in eukaryotes, many organelles; may be a single or double lipid bilayer; also includes associated proteins. A stable assembly of two or more macromolecules, i.e. proteins, nucleic acids, carbohydrates or lipids, in which the constituent parts function together. A constituent part of an intracellular organelle, an organized structure of distinctive morphology and function, occurring within the cell. Includes constituent parts of the nucleus, mitochondria, plastids, vacuoles, vesicles, ribosomes and the cytoskeleton but excludes the plasma membrane. Any constituent part of a cell, the basic structural and functional unit of all organisms. Any constituent part of a membrane, a double layer of lipid molecules that encloses all cells, and, in eukaryotes, many organelles; may be a single or double lipid bilayer; also includes associated proteins. The membrane that surrounds the acrosomal lumen. The acrosome is a special type of lysosome in the head of a spermatozoon that contains acid hydrolases and is concerned with the breakdown of the outer membrane of the ovum during fertilization. The lipid bilayer surrounding a secretory granule.

View Gene Ontology (GO) Term

GO TERM SUMMARY
Name: protein C inhibitor-acrosin complex
Acc: GO:0033282
Aspect: Cellular Component
Desc: A heterodimeric protein complex of protein C inhibitor and acrosin; complex formation inhibits the protease activity of acrosin.
Synonyms:
  • PCI-acrosin complex
  • PCI-ACR complex
Proteins in PDR annotated with:
   This term: 0
   Term or descendants: 0


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0033282 - protein C inhibitor-acrosin complex (interactive image map)
YRC Informatics Platform - Version 3.0
Created and Maintained by: Michael Riffle