PXD044258

PXD044258 is an original dataset announced via ProteomeXchange.

Title	Catalytic and non-catalytic functions of DNA polymerase kappa in translesion DNA synthesis
Description	Translesion DNA synthesis (TLS) is a cellular process that enables the bypass of DNA lesions encountered during DNA replication and is emerging as a primary target of chemotherapy. Among vertebrate DNA polymerases, polymerase kappa (PolK) has the distinctive ability to bypass minor groove DNA adducts in vitro. However, PolK is also required for cells to overcome major groove DNA adducts but the basis of this requirement is unclear. Here, we combine CRISPR base editor screening technology in human cells with TLS analysis of defined DNA lesions in Xenopus egg extracts to unravel the functions and regulations of PolK during lesion bypass. Strikingly, we show that PolK has two main functions during TLS, which are differentially regulated via Rev1 binding. On the one hand, PolK is essential to replicate across a minor groove DNA lesion in a process that depends on PCNA ubiquitylation but is independent of Rev1. On the other hand, via its cooperative interaction with Rev1 and ubiquitylated PCNA, PolK appears to stabilize the Rev1-PolZ extension complex on DNA to allow extension past major groove DNA lesions and abasic sites, in a process that is independent of PolK's catalytic activity. Together, our work identifies catalytic and non-catalytic functions of PolK in TLS and reveals important regulatory mechanisms underlying the unique domain architecture present at the C-terminal end of Y-family TLS polymerases.
HostingRepository	PRIDE
AnnounceDate	2024-08-27
AnnouncementXML	Submission_2024-08-27_05:15:37.757.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Ivo Hendriks
SpeciesList	scientific name: Xenopus laevis (African clawed frog); NCBI TaxID: 8355;
ModificationList	No PTMs are included in the dataset
Instrument	Orbitrap Exploris 480

Revision	Datetime	Status	ChangeLog Entry
0	2023-08-01 04:45:03	ID requested
⏵ 1	2024-08-27 05:15:38	announced

Dataset with its publication pending

submitter keyword: Xenopus, TLS, Polz, Polk, Rev1, polymerase kappa, ubiquitin, translesion DNA synthesis, PCNA, DNA replication

Ivo Hendriks
contact affiliation	Proteomics program, Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
contact email	ivo.a.hendriks@gmail.com
lab head
Ivo Hendriks
contact affiliation	Proteomics program, Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark
contact email	ivo.a.hendriks@gmail.com
dataset submitter

Dataset FTP location NOTE: Most web browsers have now discontinued native support for FTP access within the browser window. But you can usually install another FTP app (we recommend FileZilla) and configure your browser to launch the external application when you click on this FTP link. Or otherwise, launch an app that supports FTP (like FileZilla) and use this address: ftp://ftp.pride.ebi.ac.uk/pride/data/archive/2024/08/PXD044258

PRIDE project URI

• PRIDE
  1. PXD044258
     1. Label: PRIDE project
     2. Name: Catalytic and non-catalytic functions of DNA polymerase kappa in translesion DNA synthesis