PXD031315

PXD031315 is an original dataset announced via ProteomeXchange.

Title	The structural basis of Cdc7-Dbf4 kinase dependent targeting and phosphorylation of the MCM2-7 double hexamer
Description	The controlled assembly of replication forks is critical for genome stability. The Dbf4-dependent Cdc7 kinase (DDK) initiates replisome assembly by phosphorylating the MCM2-7 replicative helicase at the N-terminal tails of Mcm2, Mcm4 and Mcm6. At present, it remains poorly understood how DDK docks onto the helicase and how the kinase targets distal Mcm subunits for phosphorylation. By cryo-electron microscopy and biochemical analysis we discovered that an interaction between the HBRCT domain of Dbf4 with Mcm2 serves as an anchoring point, which supports binding of DDK across the MCM2-7 double-hexamer interface and phosphorylation of Mcm4 on the opposite hexamer. Moreover, a rotation of DDK along its anchoring point allows phosphorylation of Mcm2 and Mcm6 on opposite hexamers. In summary, our work provides fundamental insights in the DDK structure, control and the selective activation of the MCM2-7 helicase during DNA replication, which can be exploited for development of novel DDK inhibitors.
HostingRepository	PRIDE
AnnounceDate	2023-11-14
AnnouncementXML	Submission_2023-11-14_08:54:39.743.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Alex Montoya
SpeciesList	scientific name: Saccharomyces cerevisiae; NCBI TaxID: NCBITaxon:4932; scientific name: Saccharomyces cerevisiae (Baker's yeast); NCBI TaxID: 4932;
ModificationList	thiophosphorylated residue; acetylated residue; monohydroxylated residue; iodoacetamide derivatized residue
Instrument	Q Exactive HF-X

Revision	Datetime	Status	ChangeLog Entry
0	2022-01-30 10:39:17	ID requested
1	2022-05-31 05:33:41	announced
⏵ 2	2023-11-14 08:54:40	announced	2023-11-14: Updated project metadata.

Dataset with its publication pending

submitter keyword: cryo-EM, DDK, yeast, S-phase, Dbf4, molecular dynamics, helicase, origins, Cdc7, helicase activation, kinase,MCM2-7, DNA replication

Dr Pavel Shliaha
contact affiliation	Core facility head
contact email	p.shliaha@lms.mrc.ac.uk
lab head
Alex Montoya
contact affiliation	Medical Research Council - London Institute of Medical Sciences
contact email	alex.montoya@lms.mrc.ac.uk
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD031315
     1. Label: PRIDE project
     2. Name: The structural basis of Cdc7-Dbf4 kinase dependent targeting and phosphorylation of the MCM2-7 double hexamer