OCA at 08:06, 22 May 2024

OCA — Wed, 22 May 2024 08:06:51 GMT

←Older revision		Revision as of 08:06, 22 May 2024
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-	'''Unreleased structure'''

-	~~The entry~~ 8vzm is ~~ON HOLD until Paper~~ Publication	+	==DNA Ligase 1 captured with pre-step 3 ligation at the rA:T nicksite==
		+	<StructureSection load='8vzm' size='340' side='right'caption='[[8vzm]], [[Resolution\|resolution]] 2.51Å' scene=''>
		+	== Structural highlights ==
		+	<table><tr><td colspan='2'>[[8vzm]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8VZM OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8VZM FirstGlance]. <br>
		+	</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models\|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution\|Resolution]] 2.51Å</td></tr>
		+	<tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=AMP:ADENOSINE+MONOPHOSPHATE'>AMP</scene></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=8vzm FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8vzm OCA], [https://pdbe.org/8vzm PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8vzm RCSB], [https://www.ebi.ac.uk/pdbsum/8vzm PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8vzm ProSAT]</span></td></tr>
		+	</table>
		+	== Function ==
		+	[https://www.uniprot.org/uniprot/DNLI1_HUMAN DNLI1_HUMAN] DNA ligase that seals nicks in double-stranded DNA during DNA replication, DNA recombination and DNA repair.
		+	<div style="background-color:#fffaf0;">
		+	== Publication Abstract from PubMed ==
		+	Human DNA ligase 1 (LIG1) is the main replicative ligase that seals Okazaki fragments during nuclear replication and finalizes DNA repair pathways by joining DNA ends of the broken strand breaks in the three steps of the ligation reaction. LIG1 can tolerate the RNA strand upstream of the nick, yet an atomic insight into the sugar discrimination mechanism by LIG1 against a ribonucleotide at the 3'-terminus of nick DNA is unknown. Here, we determined X-ray structures of LIG1/3'-RNA-DNA hybrids and captured the ligase during pre- and post-step 3 the ligation reaction. Furthermore, the overlays of 3'-rA:T and 3'-rG:C step 3 structures with step 2 structures of canonical 3'-dA:T and 3'-dG:C uncover a network of LIG1/DNA interactions through Asp570 and Arg871 side chains with 2'-OH of the ribose at nick showing a final phosphodiester bond formation and the other ligase active site residues surrounding the AMP site. Finally, we demonstrated that LIG1 can ligate the nick DNA substrates with pre-inserted 3'-ribonucleotides as efficiently as Watson-Crick base-paired ends in vitro. Together, our findings uncover a novel atomic insight into a lack of sugar discrimination by LIG1 and the impact of improper sugar on the nick sealing of ribonucleotides at the last step of DNA replication and repair.

-	~~Authors~~:	+	Structures of LIG1 provide a mechanistic basis for understanding a lack of sugar discrimination against a ribonucleotide at the 3'-end of nick DNA.,Balu KE, Gulkis M, Almohdar D, Caglayan M J Biol Chem. 2024 Mar 24;300(5):107216. doi: 10.1016/j.jbc.2024.107216. PMID:38522520<ref>PMID:38522520</ref>

-	~~Description~~:	+	From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
-	[[Category: ~~Unreleased~~ Structures]]	+	</div>
		+	<div class="pdbe-citations 8vzm" style="background-color:#fffaf0;"></div>
		+	== References ==
		+	<references/>
		+	__TOC__
		+	</StructureSection>
		+	[[Category: Homo sapiens]]
		+	[[Category: Large Structures]]
		+	[[Category: Synthetic construct]]
		+	[[Category: Caglayan M]]
		+	[[Category: Gulkis M]]
		+	[[Category: KanalElamparithi B]]

OCA at 08:13, 1 March 2024

OCA — Fri, 01 Mar 2024 08:13:17 GMT

←Older revision		Revision as of 08:13, 1 March 2024
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	'''Unreleased structure'''		'''Unreleased structure'''

-	The entry 8vzm is ON HOLD	+	The entry 8vzm is ON HOLD until Paper Publication

	Authors:		Authors:

OCA: Protected "8vzm" [edit=sysop:move=sysop]

OCA — Wed, 21 Feb 2024 07:56:56 GMT

Protected "8vzm" [edit=sysop:move=sysop]

←Older revision

Revision as of 07:56, 21 February 2024

OCA: New page: '''Unreleased structure''' The entry 8vzm is ON HOLD Authors: Description: Category: Unreleased Structures

OCA — Wed, 21 Feb 2024 07:56:55 GMT

New page: '''Unreleased structure''' The entry 8vzm is ON HOLD Authors: Description: Category: Unreleased Structures

New page

'''Unreleased structure'''

The entry 8vzm is ON HOLD

Authors:

Description:
[[Category: Unreleased Structures]]

8vzm - Revision history

OCA at 08:06, 22 May 2024

OCA at 08:13, 1 March 2024

OCA: Protected "8vzm" [edit=sysop:move=sysop]

OCA: New page: '''Unreleased structure''' The entry 8vzm is ON HOLD Authors: Description: Category: Unreleased Structures