OCA at 06:14, 19 July 2023

OCA — Wed, 19 Jul 2023 06:14:36 GMT

←Older revision		Revision as of 06:14, 19 July 2023
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-	'''Unreleased structure'''

-	~~The entry~~ 8gaj is ~~ON HOLD until Paper~~ Publication	+	==Crystal Structure of E. coli LptA in complex with Podisus maculiventris Thanatin==
		+	<StructureSection load='8gaj' size='340' side='right'caption='[[8gaj]], [[Resolution\|resolution]] 2.43Å' scene=''>
		+	== Structural highlights ==
		+	<table><tr><td colspan='2'>[[8gaj]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli] and [https://en.wikipedia.org/wiki/Podisus_maculiventris Podisus maculiventris]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8GAJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8GAJ 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]] 2.43Å</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=8gaj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8gaj OCA], [https://pdbe.org/8gaj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8gaj RCSB], [https://www.ebi.ac.uk/pdbsum/8gaj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8gaj ProSAT]</span></td></tr>
		+	</table>
		+	== Function ==
		+	[https://www.uniprot.org/uniprot/A0A6D0DFJ5_ECOLX A0A6D0DFJ5_ECOLX] Involved in the assembly of lipopolysaccharide (LPS). Required for the translocation of LPS from the inner membrane to the outer membrane. May form a bridge between the inner membrane and the outer membrane, via interactions with LptC and LptD, thereby facilitating LPS transfer across the periplasm.[HAMAP-Rule:MF_01914]
		+	<div style="background-color:#fffaf0;">
		+	== Publication Abstract from PubMed ==
		+	Podisus maculiventris thanatin has been reported as a potent antimicrobial peptide with antibacterial and antifungal activity. Its antibiotic activity has been most thoroughly characterized against E. coli and shown to interfere with multiple pathways, such as the lipopolysaccharide transport (LPT) pathway comprised of seven different Lpt proteins. Thanatin binds to E. coli LptA and LptD, thus disrupting the LPT complex formation and inhibiting cell wall synthesis and microbial growth. Here, we performed a genomic database search to uncover novel thanatin orthologs, characterized their binding to E. coli LptA using bio-layer interferometry, and assessed their antimicrobial activity against E. coli. We found that thanatins from Chinavia ubica and Murgantia histrionica bound tighter (by 3.6- and 2.2-fold respectively) to LptA and exhibited more potent antibiotic activity (by 2.1- and 2.8-fold respectively) than the canonical thanatin from P. maculiventris. We crystallized and determined the LptA-bound complex structures of thanatins from C. ubica (1.90 A resolution), M. histrionica (1.80 A resolution), and P. maculiventris (2.43 A resolution) to better understand their mechanism of action. Our structural analysis revealed that residues A10 and I21 in C. ubica and M. histrionica thanatin are important for improving the binding interface with LptA, thus overall improving the potency of thanatin against E. coli. We also designed a stapled variant of thanatin that removes the need for a disulfide bond but retains the ability to bind LptA and antibiotic activity. Our discovery presents a library of novel thanatin sequences to serve as starting scaffolds for designing more potent antimicrobial therapeutics.

-	~~Authors~~:	+	Discovery, characterization, and redesign of potent antimicrobial thanatin orthologs from Chinavia ubica and Murgantia histrionica targeting E. coli LptA.,Huynh K, Kibrom A, Donald BR, Zhou P J Struct Biol X. 2023 Jun 13;8:100091. doi: 10.1016/j.yjsbx.2023.100091. , eCollection 2023 Dec. PMID:37416832<ref>PMID:37416832</ref>

-	~~Description~~:	+	From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
-	[[Category: ~~Unreleased~~ Structures]]	+	</div>
		+	<div class="pdbe-citations 8gaj" style="background-color:#fffaf0;"></div>
		+	== References ==
		+	<references/>
		+	__TOC__
		+	</StructureSection>
		+	[[Category: Escherichia coli]]
		+	[[Category: Large Structures]]
		+	[[Category: Podisus maculiventris]]
		+	[[Category: Donald B]]
		+	[[Category: Huynh K]]
		+	[[Category: Kibrom A]]
		+	[[Category: Zhou P]]

OCA at 04:54, 7 April 2023

OCA — Fri, 07 Apr 2023 04:54:56 GMT

←Older revision		Revision as of 04:54, 7 April 2023
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	'''Unreleased structure'''		'''Unreleased structure'''

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

	Authors:		Authors:

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

OCA — Thu, 02 Mar 2023 04:34:05 GMT

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

←Older revision

Revision as of 04:34, 2 March 2023

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

OCA — Thu, 02 Mar 2023 04:34:04 GMT

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

New page

'''Unreleased structure'''

The entry 8gaj is ON HOLD

Authors:

Description:
[[Category: Unreleased Structures]]

8gaj - Revision history

OCA at 06:14, 19 July 2023

OCA at 04:54, 7 April 2023

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

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