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| Term | perinuclear theca | ID (Ontology) | GO:0033011 (Gene Ontology) |
| Definition | A condensed cytoplasmic structure that covers the nucleus of mammalian spermatozoa except for a narrow zone around the insertion of the tail. It shows two distinct regions, a subacrosomal layer and, continuing caudally beyond the acrosomic system, the postacrosomal sheath. The perinuclear theca has been considered a cytoskeletal scaffold responsible for maintaining the overall architecture of the mature sperm head; however, recent studies indicate that the bulk of its constituent proteins are not traditional cytoskeletal proteins but rather a variety of cytosolic proteins.[ PubMed:17289678 PubMed:8025156 ] | ||
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intracellular membraneless organelle |__cytoskeleton |__perinuclear theca |
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| Is a | cytoskeleton | ||
| Part of | perinuclear region of cytoplasm | ||
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