Page last updated: 2024-10-24
spindle assembly involved in female meiosis
Definition
Target type: biologicalprocess
The aggregation, arrangement and bonding together of a set of components to form the spindle during a meiotic cell cycle in females. An example of this is found in Drosophila melanogaster. [GOC:mah]
Spindle assembly during female meiosis is a complex process that ensures the proper segregation of chromosomes to daughter cells. It begins with the formation of microtubule organizing centers (MTOCs), which are specialized structures that nucleate and organize microtubules. In female meiosis, the MTOCs are the poles of the spindle apparatus, which is a bipolar structure composed of microtubules that attach to the chromosomes.
The first meiotic division in females, meiosis I, is a reductional division, meaning that the number of chromosomes is halved. This is achieved through the separation of homologous chromosomes. During prophase I, the homologous chromosomes pair up and exchange genetic material through a process called crossing over. This process ensures genetic diversity among offspring.
As the cell progresses into metaphase I, the spindle fibers attach to the centromeres of each homologous chromosome pair. The spindle fibers pull the homologous chromosomes towards opposite poles of the cell. In anaphase I, the homologous chromosomes separate and move to opposite poles.
The second meiotic division, meiosis II, is an equational division, meaning that the number of chromosomes remains the same. This division is similar to mitosis, and it results in the separation of sister chromatids. During prophase II, the chromosomes condense and the spindle fibers attach to the centromeres. The spindle fibers pull the sister chromatids towards opposite poles of the cell. In anaphase II, the sister chromatids separate and move to opposite poles.
After meiosis II, the cell divides into four haploid daughter cells. These cells contain only one set of chromosomes, half the number of chromosomes present in the original diploid cell. The final product of female meiosis is one mature egg cell and three polar bodies, which are small cells that eventually degenerate.
The spindle assembly checkpoint is a critical regulatory mechanism that ensures that the chromosomes are properly aligned on the spindle before the cell enters anaphase. This checkpoint helps to prevent aneuploidy, a condition where cells have an abnormal number of chromosomes. This is especially important in female meiosis, as aneuploidy is a major cause of miscarriage and birth defects.'
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Proteins (3)
| Protein | Definition | Taxonomy |
|---|---|---|
| Tubulin beta-8 chain | A tubulin beta-8 chain that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q3ZCM7] | Homo sapiens (human) |
| DNA damage-binding protein 1 | A DNA damage-binding protein 1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q16531] | Homo sapiens (human) |
| Phosphatidylinositol 3,4,5-trisphosphate 3-phosphatase and dual-specificity protein phosphatase PTEN | A phosphatidylinositol 3,4,5-trisphosphate 3-phosphatase and dual-specificity protein phosphatase PTEN that is encoded in the genome of human. [PRO:PD, UniProtKB:P60484] | Homo sapiens (human) |
Compounds (66)
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| nocodazole | aromatic ketone; benzimidazoles; carbamate ester; thiophenes | antimitotic; antineoplastic agent; microtubule-destabilising agent; tubulin modulator | |
| thalidomide | 2-(2,6-dioxopiperidin-3-yl)-1H-isoindole-1,3(2H)-dione : A dicarboximide that is isoindole-1,3(2H)-dione in which the hydrogen attached to the nitrogen is substituted by a 2,6-dioxopiperidin-3-yl group. thalidomide : A racemate comprising equimolar amounts of R- and S-thalidomide. Thalidomide: A piperidinyl isoindole originally introduced as a non-barbiturate hypnotic, but withdrawn from the market due to teratogenic effects. It has been reintroduced and used for a number of immunological and inflammatory disorders. Thalidomide displays immunosuppressive and anti-angiogenic activity. It inhibits release of TUMOR NECROSIS FACTOR-ALPHA from monocytes, and modulates other cytokine action. | phthalimides; piperidones | |
| vincristine | acetate ester; formamides; methyl ester; organic heteropentacyclic compound; organic heterotetracyclic compound; tertiary alcohol; tertiary amino compound; vinca alkaloid | antineoplastic agent; drug; microtubule-destabilising agent; plant metabolite; tubulin modulator | |
| colchicine | (S)-colchicine : A colchicine that has (S)-configuration. It is a secondary metabolite, has anti-inflammatory properties and is used to treat gout, crystal-induced joint inflammation, familial Mediterranean fever, and many other conditions. | alkaloid; colchicine | anti-inflammatory agent; gout suppressant; mutagen |
| kokusaginine | kokusaginine: antimalarial alkaloid from Teclea afzelii; structure in first source | organic heterotricyclic compound; organonitrogen heterocyclic compound; oxacycle | |
| podophyllotoxin | Podophyllum: A genus of poisonous American herbs, family BERBERIDACEAE. The roots yield PODOPHYLLOTOXIN and other pharmacologically important agents. The plant was formerly used as a cholagogue and cathartic. It is different from the European mandrake, MANDRAGORA. | furonaphthodioxole; lignan; organic heterotetracyclic compound | antimitotic; antineoplastic agent; keratolytic drug; microtubule-destabilising agent; plant metabolite; tubulin modulator |
| vinblastine | |||
| desacetamidocolchicine | desacetamidocolchicine: structure given in first source | ||
| thiocholchicine | thiocholchicine: RN refers to (S)-isomer | ||
| parbendazole | parbendazole: anthelmintic used against a variety of gastrointestinal parasites; minor descriptor (75-86); on-line & INDEX MEDICUS search BENZIMIDAZOLES; RN given refers to parent cpd | benzimidazoles; carbamate ester | |
| paclitaxel | Taxus: Genus of coniferous yew trees or shrubs, several species of which have medicinal uses. Notable is the Pacific yew, Taxus brevifolia, which is used to make the anti-neoplastic drug taxol (PACLITAXEL). | taxane diterpenoid; tetracyclic diterpenoid | antineoplastic agent; human metabolite; metabolite; microtubule-stabilising agent |
| 2-demethylthiocolchicine | 2-demethylthiocolchicine: RN & structure given in first source; RN not in Chemline 10/85 | ||
| 3-demethylthiocolchicine | 3-demethylthiocolchicine: RN & structure given in first source; RN not in Chemline 10/85 | ||
| quercetin 5,7,3',4'-tetramethyl ether | quercetin 5,7,3',4'-tetramethyl ether : A tetramethoxyflavone that is the 5,7,3',4'-tetramethy-derivative of quercetin. | flavonols; tetramethoxyflavone | plant metabolite |
| 5,4'-dihydroxy-3,6,7,8,3'-pentamethoxyflavone | 5,4'-dihydroxy-3,6,7,8,3'-pentamethoxyflavone: a flavonol isolated from Polanisia dodecandra; structure given in first source | ||
| celastrol | monocarboxylic acid; pentacyclic triterpenoid | anti-inflammatory drug; antineoplastic agent; antioxidant; EC 5.99.1.3 [DNA topoisomerase (ATP-hydrolysing)] inhibitor; Hsp90 inhibitor; metabolite | |
| pomalidomide | 3-aminophthalimidoglutarimide: structure in first source | aromatic amine; dicarboximide; isoindoles; piperidones | angiogenesis inhibitor; antineoplastic agent; immunomodulator |
| 5-hydroxy-3,6,7,8,3',4'-hexamethoxyflavone | 5-hydroxy-3,6,7,8,3',4'-hexamethoxyflavone: has antineoplastic activity; structure in first source | ether; flavonoids | |
| docetaxel | hydrate; secondary alpha-hydroxy ketone | antineoplastic agent | |
| levofloxacin | levofloxacin : An optically active form of ofloxacin having (S)-configuration; an inhibitor of bacterial topoisomerase IV and DNA gyrase. Levofloxacin: The L-isomer of Ofloxacin. | 9-fluoro-3-methyl-10-(4-methylpiperazin-1-yl)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic acid; fluoroquinolone antibiotic; quinolone antibiotic | antibacterial drug; DNA synthesis inhibitor; EC 5.99.1.3 [DNA topoisomerase (ATP-hydrolysing)] inhibitor; topoisomerase IV inhibitor |
| 3,3',4',5,6,7,8-heptamethoxyflavone | 3,3',4',5,6,7,8-heptamethoxyflavone: has anti-inflammatory activity; isolated from citrus fruit; exhibit antiadhesive action on platelets | ether; flavonoids | |
| ustiloxin d | ustiloxin D: an antimitotic cyclic peptide; from false smut balls on rice panicles caused by Ustilaginoidea virens; structure given in first source | oligopeptide | |
| 4'-demethyldesoxypodophyllotoxin | 4'-demethyldeoxypodophyllotoxin : A member of the class of furonaphthodioxoles that is (5R,5aR,8aR)-5,8,8a,9-tetrahydro-2H-furo[3',4':6,7]naphtho[2,3-d][1,3]dioxol-6(5aH)-one substituted at position 5 by a 4-hydroxy-3,5-dimethoxyphenyl group. 4'-demethyldesoxypodophyllotoxin: from the root of Bursera tonkinensis Guillaum; structure in first source | furonaphthodioxole; gamma-lactone; lignan; methoxybenzenes; phenols | antineoplastic agent; antioxidant; immunosuppressive agent; plant metabolite |
| 2-phenyl-4-oxohydroquinoline | 2-phenyl-4-oxohydroquinoline: structure given in first source | ||
| ustiloxin a | ustiloxin A: a modified peptide from the fungus Ustilaginoidea virens or false smut ball; structurally similar to phomopsin A; structure given in first source | ||
| lenalidomide | aromatic amine; dicarboximide; isoindoles; piperidones | angiogenesis inhibitor; antineoplastic agent; immunomodulator | |
| vinblastine sulfate | alkaloid sulfate salt | ||
| vincaleukoblastine | acetate ester; indole alkaloid fundamental parent; methyl ester; organic heteropentacyclic compound; organic heterotetracyclic compound; tertiary alcohol; tertiary amino compound; vinca alkaloid | antineoplastic agent; immunosuppressive agent; microtubule-destabilising agent; plant metabolite | |
| gardenin a | gardenin A: promotes neurite outgrowth; structure in first source | ||
| noscapine | (-)-noscapine : A benzylisoquinoline alkaloid that is 1,2,3,4-tetrahydroisoquinoline which is substituted by a 4,5-dimethoxy-3-oxo-1,3-dihydro-2-benzofuran-1-yl group at position 1, a methylenedioxy group at positions 6-7 and a methoxy group at position 8. Obtained from plants of the Papaveraceae family, it lacks significant painkilling properties and is primarily used for its antitussive (cough-suppressing) effects. Noscapine: A naturally occurring opium alkaloid that is a centrally acting antitussive agent. | aromatic ether; benzylisoquinoline alkaloid; cyclic acetal; isobenzofuranone; organic heterobicyclic compound; organic heterotricyclic compound; tertiary amino compound | antineoplastic agent; antitussive; apoptosis inducer; plant metabolite |
| 3',4',5'-trimethoxyflavone | 3',4',5'-trimethoxyflavone: structure in first source | ether; flavonoids | |
| anthricin | anthricin: antitumor constituent from Anthriscus sylvestris (L.) Hoffm; structure in first source deoxypodophyllotoxin : A member of the class of furonaphthodioxoles that is (5R,5aR,8aR)-5,8,8a,9-tetrahydro-2H-furo[3',4':6,7]naphtho[2,3-d][1,3]dioxol-6(5aH)-one substituted at position 5 by a 3,4,5-trimethoxyphenyl group. | furonaphthodioxole; gamma-lactone; lignan; methoxybenzenes | antineoplastic agent; apoptosis inducer; plant metabolite |
| 5-demethylnobiletin | 5-demethylnobiletin: antineoplastic from Citrus plants; structure in first source | ether; flavonoids | |
| 5,3'-dihydroxy-3,6,7,8,4'-pentamethoxyflavone | 5,3'-dihydroxy-3,6,7,8,4'-pentamethoxyflavone: an antineoplastic flavonol isolated from Polanisia dodecandra; structure given in first source | ||
| epothilone b | epothilone; epoxide | antineoplastic agent; apoptosis inducer; microtubule-stabilising agent | |
| chalcone | trans-chalcone : The trans-isomer of chalcone. | chalcone | EC 3.2.1.1 (alpha-amylase) inhibitor |
| 2-amino-3-cyano-7-(dimethylamino)-4-(3-methoxy-4,5-methylenedioxyphenyl)-4h-chromene | 2-amino-3-cyano-7-(dimethylamino)-4-(3-methoxy-4,5-methylenedioxyphenyl)-4H-chromene: induces apoptosis; structure in first source | ||
| e 7010 | E 7010: inhibits tubulin polymerization; structure given in first source | sulfonamide | |
| eupatilin | eupatilin : A trimethoxyflavone that is flavone substituted by hydroxy groups at C-5 and C-7 and methoxy groups at C-6, C-3' and C-4' respectively. Isolated from Citrus reticulata and Salvia tomentosa, it exhibits anti-inflammatory, anti-ulcer and antineoplastic activities. eupatilin: isolated from Artemisia argyi | dihydroxyflavone; trimethoxyflavone | anti-inflammatory agent; anti-ulcer drug; antineoplastic agent; EC 1.13.11.34 (arachidonate 5-lipoxygenase) inhibitor; metabolite |
| ayanin | 3',5-dihydroxy-3,4',7-trimethoxyflavone : A trimethoxyflavone that is quercetin in which the hydroxy groups at positions 3, 4' and 7 have been replaced by methoxy groups. ayanin: has cytoprotective and anti-neuroinflammatory activities; isolated from Croton schiedeanus (Euphorbiaceae); structure in first source | dihydroxyflavone; trimethoxyflavone | plant metabolite |
| morin | morin : A pentahydroxyflavone that is 7-hydroxyflavonol bearing three additional hydroxy substituents at positions 2' 4' and 5. morin: a light yellowish pigment found in the wood of old fustic (Chlorophora tinctoria) | 7-hydroxyflavonol; pentahydroxyflavone | angiogenesis modulating agent; anti-inflammatory agent; antibacterial agent; antihypertensive agent; antineoplastic agent; antioxidant; EC 5.99.1.2 (DNA topoisomerase) inhibitor; hepatoprotective agent; metabolite; neuroprotective agent |
| santin | santin : A trimethoxyflavone that is flavone substituted by methoxy groups at positions 3, 6 and 4' and hydroxy groups at positions 5 and 7 respectively. santin: from Tanacetum microphyllum; structure given in first source | dihydroxyflavone; trimethoxyflavone | plant metabolite |
| curacin a | curacin A: RN refers to curacin A (the Z,E,E-isomer), the major lipid component of a strain of the marine cyanobacterium Lyngbya majuscula; structure given in first source | thiazoles | |
| vinorelbine | acetate ester; methyl ester; organic heteropentacyclic compound; organic heterotetracyclic compound; ring assembly; vinca alkaloid | antineoplastic agent; photosensitizing agent | |
| centaureidin | centaureidin : A trihydroxyflavone that consists of quercetagetin in which the hydroxy groups at positions 3, 6 and 4' have been replaced by methoxy groups. It has been isolated from Eremophila mitchellii and Athroisma proteiforme. centaureidin: structure given in first source; isolated from Tanacetum microphyllum, Brickellia veronicaefolia | trihydroxyflavone; trimethoxyflavone | antineoplastic agent; cyclooxygenase 1 inhibitor; cyclooxygenase 2 inhibitor; plant metabolite |
| eupatin | eupatin : A trimethoxyflavone that is quercetagetin methylated at positions 4', 6 and 7. | flavonols; trihydroxyflavone; trimethoxyflavone | |
| 5,7-dihydroxy-4',6-dimethoxyflavone | 5,7-dihydroxy-4',6-dimethoxyflavone: from Cirsium japonicum D. C. pectolinarigenin : A dimethoxyflavone that is the 6,4'-dimethyl ether derivative of scutellarein. | dihydroxyflavone; dimethoxyflavone | plant metabolite |
| fosbretabulin | stilbenoid | ||
| 5,7,3'-trihydroxy-3,4'-dimethoxyflavone | 5,7,3'-trihydroxy-3,4'-dimethoxyflavone: induced cell death in human leukemia cells is dependent on caspases and activates the MAPK pathway; structure in first source quercetin 3,4'-dimethyl ether : A dimethoxyflavone that is the 3,4'-dimethyl ether derivative of quercetin. Isolated from Combretum quadrangulare, it exhibits antineoplastic activity. | dimethoxyflavone; trihydroxyflavone | antineoplastic agent; metabolite |
| 1-(4-methoxyphenyl)-2-(3,4,5-trimethoxyphenyl)ethene | |||
| vinblastine sulfate | |||
| ternatin (flavonoid) | ternatin (flavonoid): from Sceptridium ternatum; also isolated from Egletes viscosa; structure in first source | ether; flavonoids | |
| cryptophycin 1 | |||
| pironetin | pironetin: a microbial secondary metabolite having the activity of shortening plant height from Streptomyces sp.; structure in first source | aliphatic alcohol | |
| ave-8063 | AVE-8063: has both antivascular and antineoplastic activities; structure in first source | ||
| dolastatin 10 | dolastatin 10 : A tetrapeptide that is isolated from the sea hare Dolabella auricularia. It is a potent anticancer agent which inhibits tubulin polymerization. dolastatin 10: from mollusk Dolabella auricularia; contains four amino acids, dolavaline, dolaisoleucine, dolaproine, valine and the primary amine dolaphenine; deo-dolastatin 10 is a new dolastatin 10 chiral derivative with MW of 784 | 1,3-thiazoles; tetrapeptide | animal metabolite; antineoplastic agent; apoptosis inducer; marine metabolite; microtubule-destabilising agent |
| 3-hydroxy-4,3',4',5'-tetramethoxychalcone | 3-hydroxy-4,3',4',5'-tetramethoxychalcone: structure in first source | ||
| nsc 348103 | |||
| dolastatin 15 | dolastatin 15: from Dolabella auricularia; seven subunit depsipeptide | ||
| arenastatin a | |||
| zampanolide | zampanolide: structure in first source | ||
| kx-01 | |||
| isocombretastatin a-4 | |||
| jq1 compound | carboxylic ester; organochlorine compound; tert-butyl ester; thienotriazolodiazepine | angiogenesis inhibitor; anti-inflammatory agent; antineoplastic agent; apoptosis inducer; bromodomain-containing protein 4 inhibitor; cardioprotective agent; ferroptosis inducer | |
| MZ1 | organic molecular entity | ||
| 2-styrylquinazolin-4(3h)-one | 2-styrylquinazolin-4(3H)-one: structure given in first source |