molecular function |
| GO:0004866 | | endopeptidase inhibitor activity | | Stops, prevents or reduces the activity of an endopeptidase, any enzyme that hydrolyzes nonterminal peptide bonds in polypeptides. |
| GO:0030414 | | peptidase inhibitor activity | | Stops, prevents or reduces the activity of a peptidase, any enzyme that catalyzes the hydrolysis peptide bonds. |
| GO:0005515 | | protein binding | | Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules). |
| GO:0004867 | | serine-type endopeptidase inhibitor activity | | Stops, prevents or reduces the activity of serine-type endopeptidases, enzymes that catalyze the hydrolysis of nonterminal peptide bonds in a polypeptide chain; a serine residue (and a histidine residue) are at the active center of the enzyme. |
biological process |
| GO:0010466 | | negative regulation of peptidase activity | | Any process that stops or reduces the rate of peptidase activity, the hydrolysis of peptide bonds within proteins. |
| GO:1900004 | | negative regulation of serine-type endopeptidase activity | | Any process that stops, prevents or reduces the frequency, rate or extent of serine-type endopeptidase activity. |
| GO:0060046 | | regulation of acrosome reaction | | Any process that modulates the frequency, rate or extent of the acrosome reaction. |
cellular component |
| GO:0001669 | | acrosomal vesicle | | 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. |
| GO:0005576 | | extracellular region | | The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite. |
| GO:0005615 | | extracellular space | | That part of a multicellular organism outside the cells proper, usually taken to be outside the plasma membranes, and occupied by fluid. |