8gnn
From Proteopedia
(Difference between revisions)
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=8gnn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8gnn OCA], [https://pdbe.org/8gnn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8gnn RCSB], [https://www.ebi.ac.uk/pdbsum/8gnn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8gnn ProSAT]</span></td></tr> | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=8gnn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8gnn OCA], [https://pdbe.org/8gnn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8gnn RCSB], [https://www.ebi.ac.uk/pdbsum/8gnn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8gnn ProSAT]</span></td></tr> | ||
</table> | </table> | ||
| - | == Function == | ||
| - | [https://www.uniprot.org/uniprot/RAD9A_HUMAN RAD9A_HUMAN] Component of the 9-1-1 cell-cycle checkpoint response complex that plays a major role in DNA repair. The 9-1-1 complex is recruited to DNA lesion upon damage by the RAD17-replication factor C (RFC) clamp loader complex. Acts then as a sliding clamp platform on DNA for several proteins involved in long-patch base excision repair (LP-BER). The 9-1-1 complex stimulates DNA polymerase beta (POLB) activity by increasing its affinity for the 3'-OH end of the primer-template and stabilizes POLB to those sites where LP-BER proceeds; endonuclease FEN1 cleavage activity on substrates with double, nick, or gap flaps of distinct sequences and lengths; and DNA ligase I (LIG1) on long-patch base excision repair substrates. The 9-1-1 complex is necessary for the recruitment of RHNO1 to sites of double-stranded breaks (DSB) occurring during the S phase. RAD9A possesses 3'->5' double stranded DNA exonuclease activity. Its phosphorylation by PRKCD may be required for the formation of the 9-1-1 complex.<ref>PMID:10713044</ref> <ref>PMID:21659603</ref> | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
| - | The RAD9-RAD1-HUS1 complex (9-1-1) is a eukaryotic DNA clamp with a crucial role at checkpoints for DNA damage. The ring-like structure of 9-1-1 is opened for loading onto 5' recessed DNA by the clamp | + | The RAD9-RAD1-HUS1 complex (9-1-1) is a eukaryotic DNA clamp with a crucial role at checkpoints for DNA damage. The ring-like structure of 9-1-1 is opened for loading onto 5' recessed DNA by the clamp loader RAD17 RFC-like complex (RAD17-RLC), in which the RAD17 subunit is responsible for specificity to 9-1-1. Loading of 9-1-1 is required for activation of the ATR-CHK1 checkpoint pathway and the activation is stimulated by a 9-1-1 interacting protein, RHINO, which interacts with 9-1-1 via a recently identified RAD1-binding motif. This discovery led to the hypothesis that other interacting proteins may contain a RAD1-binding motif as well. Here, we show that vertebrate RAD17 proteins also have a putative RAD1-binding motif in their N-terminal regions, and we report the crystal structure of human 9-1-1 bound to a human RAD17 peptide incorporating the motif at 2.1 A resolution. Our structure confirms that the N-terminal region of RAD17 binds to the RAD1 subunit of 9-1-1 via specific interactions. Furthermore, we show that the RAD1-binding motif of RHINO disturbs the interaction of the N-terminal region of RAD17 with 9-1-1. Our results provide deeper understanding of how RAD17-RLC specifically recognizes 9-1-1 and imply that RHINO has a functional role in 9-1-1 loading/unloading and checkpoint activation. |
| - | The 9-1-1 DNA clamp subunit RAD1 forms specific interactions with clamp loader RAD17, revealing functional implications for binding-protein RHINO.,Hara K, Hishiki A, Hoshino T, Nagata K, Iida N, Sawada Y, Ohashi E, Hashimoto H J Biol Chem. 2023 | + | The 9-1-1 DNA clamp subunit RAD1 forms specific interactions with clamp loader RAD17, revealing functional implications for binding-protein RHINO.,Hara K, Hishiki A, Hoshino T, Nagata K, Iida N, Sawada Y, Ohashi E, Hashimoto H J Biol Chem. 2023 Apr;299(4):103061. doi: 10.1016/j.jbc.2023.103061. Epub 2023 , Feb 24. PMID:36841485<ref>PMID:36841485</ref> |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
Current revision
Crystal structure of the human RAD9-RAD1-HUS1-RAD17 complex
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