Author
Listed:
- Shih-Chi Luo
(Institute of Biological Chemistry, Academia Sinica)
- Hsin-Yi Yeh
(Institute of Biochemical Sciences, National Taiwan University)
- Wei-Hsuan Lan
(National Taiwan University)
- Yi-Min Wu
(Institute of Biological Chemistry, Academia Sinica)
- Cheng-Han Yang
(Institute of Biological Chemistry, Academia Sinica)
- Hao-Yen Chang
(Institute of Biochemical Sciences, National Taiwan University)
- Guan-Chin Su
(Institute of Biochemical Sciences, National Taiwan University)
- Chia-Yi Lee
(Institute of Biochemical Sciences, National Taiwan University)
- Wen-Jin Wu
(Institute of Biological Chemistry, Academia Sinica)
- Hung-Wen Li
(National Taiwan University)
- Meng-Chiao Ho
(Institute of Biological Chemistry, Academia Sinica
Institute of Biochemical Sciences, National Taiwan University)
- Peter Chi
(Institute of Biological Chemistry, Academia Sinica
Institute of Biochemical Sciences, National Taiwan University)
- Ming-Daw Tsai
(Institute of Biological Chemistry, Academia Sinica
Institute of Biochemical Sciences, National Taiwan University)
Abstract
Both high-fidelity and mismatch-tolerant recombination, catalyzed by RAD51 and DMC1 recombinases, respectively, are indispensable for genomic integrity. Here, we use cryo-EM, MD simulation and functional analysis to elucidate the structural basis for the mismatch tolerance of DMC1. Structural analysis of DMC1 presynaptic and postsynaptic complexes suggested that the lineage-specific Loop 1 Gln244 (Met243 in RAD51) may help stabilize DNA backbone, whereas Loop 2 Pro274 and Gly275 (Val273/Asp274 in RAD51) may provide an open “triplet gate” for mismatch tolerance. In support, DMC1-Q244M displayed marked increase in DNA dynamics, leading to unobservable DNA map. MD simulation showed highly dispersive mismatched DNA ensemble in RAD51 but well-converged DNA in DMC1 and RAD51-V273P/D274G. Replacing Loop 1 or Loop 2 residues in DMC1 with RAD51 counterparts enhanced DMC1 fidelity, while reciprocal mutations in RAD51 attenuated its fidelity. Our results show that three Loop 1/Loop 2 residues jointly enact contrasting fidelities of DNA recombinases.
Suggested Citation
Shih-Chi Luo & Hsin-Yi Yeh & Wei-Hsuan Lan & Yi-Min Wu & Cheng-Han Yang & Hao-Yen Chang & Guan-Chin Su & Chia-Yi Lee & Wen-Jin Wu & Hung-Wen Li & Meng-Chiao Ho & Peter Chi & Ming-Daw Tsai, 2021.
"Identification of fidelity-governing factors in human recombinases DMC1 and RAD51 from cryo-EM structures,"
Nature Communications, Nature, vol. 12(1), pages 1-10, December.
Handle:
RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-020-20258-1
DOI: 10.1038/s41467-020-20258-1
Download full text from publisher
Citations
Citations are extracted by the
CitEc Project, subscribe to its
RSS feed for this item.
Cited by:
- James M. Dunce & Owen R. Davies, 2024.
"BRCA2 stabilises RAD51 and DMC1 nucleoprotein filaments through a conserved interaction mode,"
Nature Communications, Nature, vol. 15(1), pages 1-11, December.
- Shih-Chi Luo & Min-Chi Yeh & Yu-Hsiang Lien & Hsin-Yi Yeh & Huei-Lun Siao & I-Ping Tu & Peter Chi & Meng-Chiao Ho, 2023.
"A RAD51–ADP double filament structure unveils the mechanism of filament dynamics in homologous recombination,"
Nature Communications, Nature, vol. 14(1), pages 1-11, December.
Corrections
All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-020-20258-1. See general information about how to correct material in RePEc.
If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.
We have no bibliographic references for this item. You can help adding them by using this form .
If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Sonal Shukla or Springer Nature Abstracting and Indexing (email available below). General contact details of provider: http://www.nature.com .
Please note that corrections may take a couple of weeks to filter through
the various RePEc services.