8ass - Revision history

OCA at 08:13, 7 February 2024

2024-02-07T08:13:32Z

←Older revision		Revision as of 08:13, 7 February 2024
Line 10:		Line 10:
	== Function ==		== Function ==
	[https://www.uniprot.org/uniprot/A0A0N1ABZ3_9HYPH A0A0N1ABZ3_9HYPH]		[https://www.uniprot.org/uniprot/A0A0N1ABZ3_9HYPH A0A0N1ABZ3_9HYPH]
-	<div style="background-color:#fffaf0;">
-	== Publication Abstract from PubMed ==
-	The dimeric avidin family has been expanded in recent years to include many new members. All of them lack the intermonomeric Trp that plays a critical role in biotin-binding. Nevertheless, these new members of the avidins maintain the high affinity towards biotin. Additionally, all of the dimeric avidins share a very unique property: namely, the cylindrical oligomerization in the crystal structure. The newest member described here, agroavidin from the agrobacterium, Rhizobium sp. AAP43, shares their important structural features. However, the affinity of agroavidin towards biotin is lower than all other members of the avidin family, due to the presence of phenylalanine instead of a conserved tyrosine in the biotin-binding site. Mutating this phenylalanine into tyrosine regenerated the high affinity, which emphasizes the importance of this particular tyrosine residue. Another unique feature that distinguishes agroavidin from the other dimeric avidins is that it does not produce oligomers in its crystal structure. In order to understand the factors that promote oligomerization in dimeric avidins, we exchanged the C-terminal region of agroavidin with that of hoefavidin that produced octamers. This exchange resulted in a decamer rather than an octamer. This unusual outcome demonstrates the impact of the C-terminal region on the ability to produce oligomers. The decameric assembly of agroavidin expands the avidin-biotin toolbox even further and could well pave the path into new biotin-based technologies. Moreover, uncovering the factors that induce dimeric avidins into oligomeric assemblies may aid in better understanding the general molecular determinants that promote oligomerization.
-
-	Self-assembly of a dimeric avidin into unique higher-order oligomers.,Bana J, Warwar J, Bayer EA, Livnah O FEBS J. 2023 Feb 28. doi: 10.1111/febs.16764. PMID:36853192<ref>PMID:36853192</ref>
-
-	From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
-	</div>
-	<div class="pdbe-citations 8ass" style="background-color:#fffaf0;"></div>
-	== References ==
-	<references/>
	__TOC__		__TOC__
	</StructureSection>		</StructureSection>

OCA at 11:10, 2 August 2023

2023-08-02T11:10:23Z

←Older revision		Revision as of 11:10, 2 August 2023
Line 4:		Line 4:
	== Structural highlights ==		== Structural highlights ==
	<table><tr><td colspan='2'>[[8ass]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Rhizobium_sp._AAP43 Rhizobium sp. AAP43]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8ASS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8ASS FirstGlance]. <br>		<table><tr><td colspan='2'>[[8ass]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Rhizobium_sp._AAP43 Rhizobium sp. AAP43]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8ASS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8ASS FirstGlance]. <br>
-	</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BTN:BIOTIN'>BTN</scene></td></tr>	+	</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models\|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution\|Resolution]] 2.12Å</td></tr>
		+	<tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BTN:BIOTIN'>BTN</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=8ass FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8ass OCA], [https://pdbe.org/8ass PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8ass RCSB], [https://www.ebi.ac.uk/pdbsum/8ass PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8ass 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=8ass FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8ass OCA], [https://pdbe.org/8ass PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8ass RCSB], [https://www.ebi.ac.uk/pdbsum/8ass PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8ass ProSAT]</span></td></tr>
	</table>		</table>

OCA at 20:29, 12 April 2023

2023-04-12T20:29:54Z

←Older revision		Revision as of 20:29, 12 April 2023
Line 1:		Line 1:
-	'''Unreleased structure'''

-	The ~~entry~~ 8ass is ~~ON HOLD until Paper~~ Publication	+	==The Crystal structure of F46Y mutant of the agroavidin-biotin complex==
		+	<StructureSection load='8ass' size='340' side='right'caption='[[8ass]], [[Resolution\|resolution]] 2.12Å' scene=''>
		+	== Structural highlights ==
		+	<table><tr><td colspan='2'>[[8ass]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Rhizobium_sp._AAP43 Rhizobium sp. AAP43]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8ASS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8ASS FirstGlance]. <br>
		+	</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BTN:BIOTIN'>BTN</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=8ass FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8ass OCA], [https://pdbe.org/8ass PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8ass RCSB], [https://www.ebi.ac.uk/pdbsum/8ass PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8ass ProSAT]</span></td></tr>
		+	</table>
		+	== Function ==
		+	[https://www.uniprot.org/uniprot/A0A0N1ABZ3_9HYPH A0A0N1ABZ3_9HYPH]
		+	<div style="background-color:#fffaf0;">
		+	== Publication Abstract from PubMed ==
		+	The dimeric avidin family has been expanded in recent years to include many new members. All of them lack the intermonomeric Trp that plays a critical role in biotin-binding. Nevertheless, these new members of the avidins maintain the high affinity towards biotin. Additionally, all of the dimeric avidins share a very unique property: namely, the cylindrical oligomerization in the crystal structure. The newest member described here, agroavidin from the agrobacterium, Rhizobium sp. AAP43, shares their important structural features. However, the affinity of agroavidin towards biotin is lower than all other members of the avidin family, due to the presence of phenylalanine instead of a conserved tyrosine in the biotin-binding site. Mutating this phenylalanine into tyrosine regenerated the high affinity, which emphasizes the importance of this particular tyrosine residue. Another unique feature that distinguishes agroavidin from the other dimeric avidins is that it does not produce oligomers in its crystal structure. In order to understand the factors that promote oligomerization in dimeric avidins, we exchanged the C-terminal region of agroavidin with that of hoefavidin that produced octamers. This exchange resulted in a decamer rather than an octamer. This unusual outcome demonstrates the impact of the C-terminal region on the ability to produce oligomers. The decameric assembly of agroavidin expands the avidin-biotin toolbox even further and could well pave the path into new biotin-based technologies. Moreover, uncovering the factors that induce dimeric avidins into oligomeric assemblies may aid in better understanding the general molecular determinants that promote oligomerization.

-	~~Authors: Livnah, O~~., Bana, J.	+	Self-assembly of a dimeric avidin into unique higher-order oligomers.,Bana J, Warwar J, Bayer EA, Livnah O FEBS J. 2023 Feb 28. doi: 10.1111/febs.16764. PMID:36853192<ref>PMID:36853192</ref>

-	~~Description: The Crystal structure of F46Y mutant~~ of the ~~agroavidin~~-~~biotin complex~~	+	From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
-	[[Category: ~~Unreleased~~ Structures]]	+	</div>
-	[[Category: ~~Livnah, O~~]]	+	<div class="pdbe-citations 8ass" style="background-color:#fffaf0;"></div>
-	[[Category: Bana, J]]	+	== References ==
		+	<references/>
		+	__TOC__
		+	</StructureSection>
		+	[[Category: Large Structures]]
		+	[[Category: Rhizobium sp. AAP43]]
		+	[[Category: Bana J]]
		+	[[Category: Livnah O]]

OCA at 04:31, 28 September 2022

2022-09-28T04:31:16Z

←Older revision		Revision as of 04:31, 28 September 2022
Line 1:		Line 1:
	'''Unreleased structure'''		'''Unreleased structure'''

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

	Authors: Livnah, O., Bana, J.		Authors: Livnah, O., Bana, J.
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	Description: The Crystal structure of F46Y mutant of the agroavidin-biotin complex		Description: The Crystal structure of F46Y mutant of the agroavidin-biotin complex
	[[Category: Unreleased Structures]]		[[Category: Unreleased Structures]]
-	[[Category: Bana, J]]
	[[Category: Livnah, O]]		[[Category: Livnah, O]]
		+	[[Category: Bana, J]]

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

2022-08-31T05:26:04Z

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

←Older revision

Revision as of 05:26, 31 August 2022

OCA: New page: '''Unreleased structure''' The entry 8ass is ON HOLD Authors: Livnah, O., Bana, J. Description: The Crystal structure of F46Y mutant of the agroavidin-biotin complex [[Category: Unrele...

2022-08-31T05:26:03Z

New page: '''Unreleased structure''' The entry 8ass is ON HOLD Authors: Livnah, O., Bana, J. Description: The Crystal structure of F46Y mutant of the agroavidin-biotin complex [[Category: Unrele...

New page

'''Unreleased structure'''

The entry 8ass is ON HOLD

Authors: Livnah, O., Bana, J.

Description: The Crystal structure of F46Y mutant of the agroavidin-biotin complex
[[Category: Unreleased Structures]]
[[Category: Bana, J]]
[[Category: Livnah, O]]