8hfs - Revision history

OCA at 19:50, 29 May 2024

OCA — Wed, 29 May 2024 19:50:59 GMT

←Older revision		Revision as of 19:50, 29 May 2024
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	== Structural highlights ==		== Structural highlights ==
	<table><tr><td colspan='2'>[[8hfs]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Lactococcus_lactis_subsp._lactis Lactococcus lactis subsp. lactis] and [https://en.wikipedia.org/wiki/Lactococcus_lactis_subsp._lactis_KF147 Lactococcus lactis subsp. lactis KF147]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8HFS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8HFS FirstGlance]. <br>		<table><tr><td colspan='2'>[[8hfs]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Lactococcus_lactis_subsp._lactis Lactococcus lactis subsp. lactis] and [https://en.wikipedia.org/wiki/Lactococcus_lactis_subsp._lactis_KF147 Lactococcus lactis subsp. lactis KF147]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8HFS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8HFS FirstGlance]. <br>
-	</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene></td></tr>	+	</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models\|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution\|Resolution]] 2.98Å</td></tr>
		+	<tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</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=8hfs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8hfs OCA], [https://pdbe.org/8hfs PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8hfs RCSB], [https://www.ebi.ac.uk/pdbsum/8hfs PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8hfs 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=8hfs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8hfs OCA], [https://pdbe.org/8hfs PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8hfs RCSB], [https://www.ebi.ac.uk/pdbsum/8hfs PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8hfs ProSAT]</span></td></tr>
	</table>		</table>
	== Function ==		== Function ==
	[https://www.uniprot.org/uniprot/D2BKY8_LACLK D2BKY8_LACLK]		[https://www.uniprot.org/uniprot/D2BKY8_LACLK D2BKY8_LACLK]
		+	<div style="background-color:#fffaf0;">
		+	== Publication Abstract from PubMed ==
		+	Lactococcin A (LcnA), a class IId bacteriocin, induces membrane leakage and cell death by specifically binding to the membrane receptor-mannose phosphotransferase system (man-PTS), as is the case for pediocin-like (class IIa) bacteriocins. The cognate immunity protein of bacteriocins, which protects the producer cell from its own bacteriocin, recognizes and binds to the bacteriocin-man-PTS complex, consequently blocking membrane leakage. We previously deciphered the mode of action and immunity of class IIa bacteriocins. Here, we determined the structure of the ternary complex of LcnA, LciA (i.e., the immunity protein), and its receptor, i.e., the man-PTS of Lactococcus lactis (ll-man-PTS). An external loop on the membrane-located component IIC of ll-man-PTS was found to prevent specific binding of the N-terminal region of LcnA to the site recognized by pediocin-like bacteriocins. Thus, the N-terminal beta-sheet region of LcnA recognized an adjacent site on the extracellular side of ll-man-PTS, with the LcnA C-terminal hydrophobic helix penetrating into the membrane. The cytoplasmic cleft formed within the man-PTS Core and Vmotif domains induced by embedded LcnA from the periplasmic side is adopted by the appropriate angle between helices H3 and H4 of the N terminus of LciA. The flexible C terminus of LciA then blocks membrane leakage. To summarize, our findings reveal the molecular mechanisms of action and immunity of LcnA and LciA, laying a foundation for further design of class IId bacteriocins. IMPORTANCE Class IId (lactococcin-like) bacteriocins and class IIa (pediocin-like) bacteriocins share a few similarities: (i) both induce membrane leakage and cell death by specifically binding the mannose phosphotransferase system (man-PTS) on their target cells, and (ii) cognate immunity proteins recognize and bind to the bacteriocin-man-PTS complex to block membrane leakage. However, class IId bacteriocins lack the "pediocin box" motif, which is typical of class IIa bacteriocins, and basically target only lactococcal cells; in contrast, class IIa bacteriocins target diverse bacterial cells, but not lactococcal cells. We previously solved the structure of class IIa bacteriocin-receptor-immunity ternary complex from Lactobacillus sakei. Here, we determined the structure of the ternary complex of class IId bacteriocin LcnA, its cognate immunity protein LciA, and its receptor, the man-PTS of Lactococcus lactis. By comparing the interactions between man-PTS and class IIa and class IId bacteriocins, this study affords some clues to better understand the specificity of bacteriocins targeting the mannose phosphotransferase system.
		+
		+	Structural Basis of the Mechanisms of Action and Immunity of Lactococcin A, a Class IId Bacteriocin.,Li R, Duan J, Zhou Y, Wang J Appl Environ Microbiol. 2023 Mar 29;89(3):e0006623. doi: 10.1128/aem.00066-23. , Epub 2023 Feb 22. PMID:36840592<ref>PMID:36840592</ref>
		+
		+	From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
		+	</div>
		+	<div class="pdbe-citations 8hfs" style="background-color:#fffaf0;"></div>
		+	== References ==
		+	<references/>
	__TOC__		__TOC__
	</StructureSection>		</StructureSection>

OCA at 06:50, 8 February 2023

OCA — Wed, 08 Feb 2023 06:50:12 GMT

←Older revision		Revision as of 06:50, 8 February 2023
Line 1:		Line 1:
-	'''Unreleased structure'''

-	~~The entry 8hfs is ON HOLD until Paper Publication~~	+	==The structure of LcnA, LciA, and the man-PTS of Lactococcus lactis==
-		+	<StructureSection load='8hfs' size='340' side='right'caption='[[8hfs]], [[Resolution\|resolution]] 2.98Å' scene=''>
-	~~Authors: Wang, J.W.~~	+	== Structural highlights ==
-		+	<table><tr><td colspan='2'>[[8hfs]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Lactococcus_lactis_subsp._lactis Lactococcus lactis subsp. lactis] and [https://en.wikipedia.org/wiki/Lactococcus_lactis_subsp._lactis_KF147 Lactococcus lactis subsp. lactis KF147]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8HFS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8HFS FirstGlance]. <br>
-	~~Description:~~ The structure of LcnA, LciA, and the man-PTS of Lactococcus lactis	+	</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene></td></tr>
-	[[Category: ~~Unreleased~~ Structures]]	+	<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=8hfs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8hfs OCA], [https://pdbe.org/8hfs PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8hfs RCSB], [https://www.ebi.ac.uk/pdbsum/8hfs PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8hfs ProSAT]</span></td></tr>
-	[[Category: Wang~~, J.W~~]]	+	</table>
		+	== Function ==
		+	[https://www.uniprot.org/uniprot/D2BKY8_LACLK D2BKY8_LACLK]
		+	__TOC__
		+	</StructureSection>
		+	[[Category: Lactococcus lactis subsp. lactis]]
		+	[[Category: Lactococcus lactis subsp. lactis KF147]]
		+	[[Category: Large Structures]]
		+	[[Category: Wang JW]]

OCA at 07:56, 14 December 2022

OCA — Wed, 14 Dec 2022 07:56:31 GMT

←Older revision		Revision as of 07:56, 14 December 2022
Line 1:		Line 1:
	'''Unreleased structure'''		'''Unreleased structure'''

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

	Authors: Wang, J.W.		Authors: Wang, J.W.

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

OCA — Thu, 24 Nov 2022 08:23:59 GMT

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

←Older revision

Revision as of 08:23, 24 November 2022

OCA: New page: '''Unreleased structure''' The entry 8hfs is ON HOLD Authors: Wang, J.W. Description: The structure of LcnA, LciA, and the man-PTS of Lactococcus lactis [[Category: Unreleased Structur...

OCA — Thu, 24 Nov 2022 08:23:56 GMT

New page: '''Unreleased structure''' The entry 8hfs is ON HOLD Authors: Wang, J.W. Description: The structure of LcnA, LciA, and the man-PTS of Lactococcus lactis [[Category: Unreleased Structur...

New page

'''Unreleased structure'''

The entry 8hfs is ON HOLD

Authors: Wang, J.W.

Description: The structure of LcnA, LciA, and the man-PTS of Lactococcus lactis
[[Category: Unreleased Structures]]
[[Category: Wang, J.W]]