Entry
Name
Oocyte meiosis - Polyodon spathula (Mississippi paddlefish)
Description
During meiosis, a single round of DNA replication is followed by two rounds of chromosome segregation, called meiosis I and meiosis II. At meiosis I, homologous chromosomes recombine and then segregate to opposite poles, while the sister chromatids segregate from each other at meoisis II. In vertebrates, immature oocytes are arrested at the PI (prophase of meiosis I). The resumption of meiosis is stimulated by progesterone, which carries the oocyte through two consecutive M-phases (MI and MII) to a second arrest at MII. The key activity driving meiotic progression is the MPF (maturation-promoting factor), a heterodimer of CDC2 (cell division cycle 2 kinase) and cyclin B. In PI-arrested oocytes, MPF is initially inactive and is activated by the dual-specificity CDC25C phosphatase as the result of new synthesis of Mos induced by progesterone. MPF activation mediates the transition from the PI arrest to MI. The subsequent decrease in MPF levels, required to exit from MI into interkinesis, is induced by a negative feedback loop, where CDC2 brings about the activation of the APC (anaphase-promoting complex), which mediates destruction of cyclin B. Re-activation of MPF for MII requires re-accumulation of high levels of cyclin B as well as the inactivation of the APC by newly synthesized Emi2 and other components of the CSF (cytostatic factor), such as cyclin E or high levels of Mos. CSF antagonizes the ubiquitin ligase activity of the APC, preventing cyclin B destruction and meiotic exit until fertilization occurs. Fertilization triggers a transient increase in cytosolic free Ca2+, which leads to CSF inactivation and cyclin B destruction through the APC. Then eggs are released from MII into the first embryonic cell cycle.
Class
Cellular Processes; Cell growth and death
BRITE hierarchy
Pathway map
Ortholog table
Other DBs
Organism
Polyodon spathula (Mississippi paddlefish) [GN:
pspa ]
Gene
121296885 cytoplasmic polyadenylation element-binding protein 4-like isoform X1 [KO:K02602 ]
121298851 cytoplasmic polyadenylation element-binding protein 1-like isoform X1 [KO:K02602 ]
121294278 cytoplasmic polyadenylation element-binding protein 1-like [KO:K02602 ]
121321878 cytoplasmic polyadenylation element-binding protein 3-like isoform X1 [KO:K02602 ]
121329934 cytoplasmic polyadenylation element-binding protein 2-like isoform X1 [KO:K02602 ]
121324240 cytoplasmic polyadenylation element-binding protein 4-like isoform X1 [KO:K02602 ]
121324613 cytoplasmic polyadenylation element-binding protein 2-like isoform X1 [KO:K02602 ]
121325233 cytoplasmic polyadenylation element-binding protein 3-like isoform X1 [KO:K02602 ]
121305212 pkmyt1; membrane-associated tyrosine- and threonine-specific cdc2-inhibitory kinase [KO:K06633 ] [EC:2.7.11.1 ]
121317537 ywhaqa; tyrosine 3-monooxygenase/tryptophan 5-monooxygenase activation protein, theta polypeptide a [KO:K16197 ]
121308632 ywhae1; tyrosine 3-monooxygenase/tryptophan 5-monooxygenase activation protein, epsilon polypeptide 1 isoform X1 [KO:K06630 ]
121310072 serine/threonine-protein phosphatase PP1-beta catalytic subunit-like isoform X1 [KO:K06269 ] [EC:3.1.3.16 ]
121297128 F-box/WD repeat-containing protein 11-like isoform X1 [KO:K03362 ]
121317167 anapc1; anaphase-promoting complex subunit 1 isoform X1 [KO:K03348 ]
121299765 anapc5; anaphase-promoting complex subunit 5 isoform X1 [KO:K03352 ]
121320698 LOW QUALITY PROTEIN: cell division cycle protein 16 homolog [KO:K03353 ]
121321149 anaphase-promoting complex subunit 10-like isoform X1 [KO:K03357 ]
121302730 anapc15; anaphase-promoting complex subunit 15 isoform X1 [KO:K25228 ]
121318529 smc1b; structural maintenance of chromosomes protein 1B isoform X1 [KO:K06636 ]
121305362 structural maintenance of chromosomes protein 1A isoform X1 [KO:K06636 ]
121325778 LOW QUALITY PROTEIN: structural maintenance of chromosomes protein 3-like [KO:K06669 ]
121322670 mad2l1; mitotic spindle assembly checkpoint protein MAD2A [KO:K02537 ]
121328397 mitotic spindle assembly checkpoint protein MAD2B-like isoform X1 [KO:K13728 ]
121300878 mad1l1; mitotic spindle assembly checkpoint protein MAD1 isoform X1 [KO:K06679 ]
121306333 ppp2r5b; serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit beta isoform [KO:K11584 ]
121315690 serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit delta isoform [KO:K11584 ]
121315959 serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit alpha isoform isoform X1 [KO:K11584 ]
121316772 serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit delta isoform-like [KO:K11584 ]
121317086 serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit alpha isoform-like isoform X1 [KO:K11584 ]
121329871 serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit gamma isoform isoform X1 [KO:K11584 ]
121330040 serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit epsilon isoform [KO:K11584 ]
121324264 serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit gamma isoform isoform X1 [KO:K11584 ]
121324682 serine/threonine-protein phosphatase 2A 56 kDa regulatory subunit epsilon isoform [KO:K11584 ]
121298657 serine/threonine-protein phosphatase 2A 65 kDa regulatory subunit A alpha isoform [KO:K03456 ]
121309384 serine/threonine-protein phosphatase 2A 65 kDa regulatory subunit A alpha isoform-like [KO:K03456 ]
121303981 serine/threonine-protein phosphatase 2A 65 kDa regulatory subunit A beta isoform [KO:K03456 ]
121304409 serine/threonine-protein phosphatase 2A 65 kDa regulatory subunit A alpha isoform-like [KO:K03456 ]
121324408 serine/threonine-protein phosphatase 2A catalytic subunit alpha isoform isoform X1 [KO:K04382 ] [EC:3.1.3.16 ]
121298161 itpr1b; inositol 1,4,5-trisphosphate receptor type 1 isoform X1 [KO:K04958 ]
121328701 inositol 1,4,5-trisphosphate receptor type 1 isoform X1 [KO:K04958 ]
121319707 inositol 1,4,5-trisphosphate receptor type 2-like isoform X1 [KO:K04959 ]
121299669 inositol 1,4,5-trisphosphate receptor type 3-like isoform X1 [KO:K04960 ]
121304724 inositol 1,4,5-trisphosphate receptor type 3-like isoform X1 [KO:K04960 ]
121296291 serine/threonine-protein phosphatase 2B catalytic subunit alpha isoform isoform X1 [KO:K04348 ] [EC:3.1.3.16 ]
121325811 serine/threonine-protein phosphatase 2B catalytic subunit beta isoform-like isoform X1 [KO:K04348 ] [EC:3.1.3.16 ]
121321999 serine/threonine-protein phosphatase 2B catalytic subunit alpha isoform-like isoform X1 [KO:K04348 ] [EC:3.1.3.16 ]
121302376 serine/threonine-protein phosphatase 2B catalytic subunit gamma isoform-like isoform X1 [KO:K04348 ] [EC:3.1.3.16 ]
121303088 serine/threonine-protein phosphatase 2B catalytic subunit gamma isoform-like isoform X1 [KO:K04348 ] [EC:3.1.3.16 ]
121324996 serine/threonine-protein phosphatase 2B catalytic subunit alpha isoform-like isoform X1 [KO:K04348 ] [EC:3.1.3.16 ]
Compound
C01245 D-myo-Inositol 1,4,5-trisphosphate
Reference
Authors
Haccard O, Jessus C
Title
Oocyte maturation, Mos and cyclins--a matter of synthesis: two functionally redundant ways to induce meiotic maturation.
Journal
Reference
Authors
Crane R, Gadea B, Littlepage L, Wu H, Ruderman JV
Title
Aurora A, meiosis and mitosis.
Journal
Reference
Authors
Perdiguero E, Nebreda AR
Title
Regulation of Cdc25C activity during the meiotic G2/M transition.
Journal
Reference
Authors
Perry JA, Kornbluth S
Title
Cdc25 and Wee1: analogous opposites?
Journal
Reference
Authors
Jessus C, Ozon R
Title
How does Xenopus oocyte acquire its competence to undergo meiotic maturation?
Journal
Reference
Authors
Revenkova E, Jessberger R
Title
Shaping meiotic prophase chromosomes: cohesins and synaptonemal complex proteins.
Journal
Reference
Authors
Belloc E, Pique M, Mendez R
Title
Sequential waves of polyadenylation and deadenylation define a translation circuit that drives meiotic progression.
Journal
Reference
Authors
Pesin JA, Orr-Weaver TL
Title
Regulation of APC/C activators in mitosis and meiosis.
Journal
Reference
Authors
Tang W, Wu JQ, Guo Y, Hansen DV, Perry JA, Freel CD, Nutt L, Jackson PK, Kornbluth S
Title
Cdc2 and Mos regulate Emi2 stability to promote the meiosis I-meiosis II transition.
Journal
Reference
Authors
Wu JQ, Kornbluth S
Title
Across the meiotic divide - CSF activity in the post-Emi2/XErp1 era.
Journal
Reference
Authors
Schmidt A, Rauh NR, Nigg EA, Mayer TU
Title
Cytostatic factor: an activity that puts the cell cycle on hold.
Journal
Reference
Authors
Vogt E, Kirsch-Volders M, Parry J, Eichenlaub-Ritter U
Title
Spindle formation, chromosome segregation and the spindle checkpoint in mammalian oocytes and susceptibility to meiotic error.
Journal
Reference
Authors
Perry AC, Verlhac MH
Title
Second meiotic arrest and exit in frogs and mice.
Journal
Reference
Authors
Tunquist BJ, Eyers PA, Chen LG, Lewellyn AL, Maller JL
Title
Spindle checkpoint proteins Mad1 and Mad2 are required for cytostatic factor-mediated metaphase arrest.
Journal
Reference
Authors
Hutchins JR, Dikovskaya D, Clarke PR.
Title
Regulation of Cdc2/cyclin B activation in Xenopus egg extracts via inhibitory phosphorylation of Cdc25C phosphatase by Ca(2+)/calmodulin-dependent protein [corrected] kinase II.
Journal
Related pathway
pspa04914 Progesterone-mediated oocyte maturation
KO pathway
LinkDB
All DBs