PXD044597

PXD044597 is an original dataset announced via ProteomeXchange.

Title	Spo13/MEIKIN ensures a two-division meiosis by preventing the activation of APC/CAma1 at meiosis I
Description	Genome haploidization at meiosis depends on two consecutive nuclear divisions, which are controlled by an oscillatory system consisting of Cdk1-cyclin B and the APC/C bound to the Cdc20 activator. How the oscillator generates exactly two divisions has been unclear. We have studied this question in yeast where exit from meiosis involves accumulation of the APC/C activator Ama1 at meiosis II. We show that inactivation of the meiosis I-specific protein Spo13/MEIKIN results in a single-division meiosis due to premature activation of APC/CAma1. In the wild-type, Spo13 bound to the polo-like kinase Cdc5 prevents Ama1 synthesis at meiosis I by stabilizing the translational repressor Rim4. In addition, Cdc5-Spo13 inhibits the activity of Ama1 by converting the B-type cyclin Clb1 from a substrate to an inhibitor of Ama1. Cdc20-dependent degradation of Spo13 at anaphase I unleashes a feedback loop that increases Ama1’s synthesis and activity, leading to irreversible exit from meiosis at the second division. Thus, by repressing the exit machinery at meiosis I, Cdc5-Spo13 ensures that cells undergo two divisions to produce haploid gametes.
HostingRepository	PRIDE
AnnounceDate	2023-09-03
AnnouncementXML	Submission_2023-09-03_12:38:29.755.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	BarbaraSteigenberger
SpeciesList	scientific name: Saccharomyces cerevisiae (Baker's yeast); NCBI TaxID: 4932;
ModificationList	phosphorylated residue
Instrument	Q Exactive HF

Revision	Datetime	Status	ChangeLog Entry
0	2023-08-15 16:07:25	ID requested
⏵ 1	2023-09-03 12:38:30	announced

Dataset with its publication pending

submitter keyword: APC/C-Ama1 / Cyclin phosphorylation / Meiotic exit / Polo-like kinase / Spo13/MEIKIN / Translational repressor

Dr. WolfgangZachariae
contact affiliation	Laboratory of Chromosome Biology Max Planck Institute of Biochemistry Am Klopferspitz 18 D-82152 Martinsried, Germany
contact email	zachar@biochem.mpg.de
lab head
BarbaraSteigenberger
contact affiliation	MPI of Biochemistry
contact email	steigenberger@biochem.mpg.de
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD044597
     1. Label: PRIDE project
     2. Name: Spo13/MEIKIN ensures a two-division meiosis by preventing the activation of APC/CAma1 at meiosis I