This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

5lil

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Current revision

Structure of Aggregatibacter actinomycetemcomitans MacB bound to ATPyS (P21)

Structural highlights

5lil is a 2 chain structure with sequence from Aggregatibacter actinomycetemcomitans. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 3.35Å
Ligands:	,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

MACB_AGGAC Part of the tripartite efflux system MacAB-TdeA. MacB is a non-canonical ABC transporter that contains transmembrane domains (TMD), which form a pore in the inner membrane, and an ATP-binding domain (NBD), which is responsible for energy generation. Confers resistance against macrolides.^[1]

Publication Abstract from PubMed

MacB is an ABC transporter that collaborates with the MacA adaptor protein and TolC exit duct to drive efflux of antibiotics and enterotoxin STII out of the bacterial cell. Here we present the structure of ATP-bound MacB and reveal precise molecular details of its mechanism. The MacB transmembrane domain lacks a central cavity through which substrates could be passed, but instead conveys conformational changes from one side of the membrane to the other, a process we term mechanotransmission. Comparison of ATP-bound and nucleotide-free states reveals how reversible dimerization of the nucleotide binding domains drives opening and closing of the MacB periplasmic domains via concerted movements of the second transmembrane segment and major coupling helix. We propose that the assembled tripartite pump acts as a molecular bellows to propel substrates through the TolC exit duct, driven by MacB mechanotransmission. Homologs of MacB that do not form tripartite pumps, but share structural features underpinning mechanotransmission, include the LolCDE lipoprotein trafficking complex and FtsEX cell division signaling protein. The MacB architecture serves as the blueprint for understanding the structure and mechanism of an entire ABC transporter superfamily and the many diverse functions it supports.

Structure and mechanotransmission mechanism of the MacB ABC transporter superfamily.,Crow A, Greene NP, Kaplan E, Koronakis V Proc Natl Acad Sci U S A. 2017 Nov 6. pii: 201712153. doi:, 10.1073/pnas.1712153114. PMID:29109272^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Xu Y, Sim SH, Nam KH, Jin XL, Kim HM, Hwang KY, Lee K, Ha NC. Crystal Structure of the Periplasmic Region of MacB, a Noncanonic ABC Transporter (,). Biochemistry. 2009 May 21. PMID:19432486 doi:10.1021/bi900415t
↑ Crow A, Greene NP, Kaplan E, Koronakis V. Structure and mechanotransmission mechanism of the MacB ABC transporter superfamily. Proc Natl Acad Sci U S A. 2017 Nov 6. pii: 201712153. doi:, 10.1073/pnas.1712153114. PMID:29109272 doi:http://dx.doi.org/10.1073/pnas.1712153114

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/5lil"

Categories: Aggregatibacter actinomycetemcomitans | Large Structures | Crow A

@@ Line 1: / Line 1: @@
 ==Structure of Aggregatibacter actinomycetemcomitans MacB bound to ATPyS (P21)==
-<StructureSection load='5lil' size='340' side='right' caption='[[5lil]], [[Resolution|resolution]] 3.35&Aring;' scene=''>
+<StructureSection load='5lil' size='340' side='right'caption='[[5lil]], [[Resolution|resolution]] 3.35&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[5lil]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5LIL OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5LIL FirstGlance]. <br>
+<table><tr><td colspan='2'>[[5lil]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Aggregatibacter_actinomycetemcomitans Aggregatibacter actinomycetemcomitans]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5LIL OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5LIL FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ATP:ADENOSINE-5-TRIPHOSPHATE'>ATP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</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]] 3.35&#8491;</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5lil FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5lil OCA], [http://pdbe.org/5lil PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5lil RCSB], [http://www.ebi.ac.uk/pdbsum/5lil PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5lil ProSAT]</span></td></tr>
+<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ATP:ADENOSINE-5-TRIPHOSPHATE'>ATP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</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=5lil FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5lil OCA], [https://pdbe.org/5lil PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5lil RCSB], [https://www.ebi.ac.uk/pdbsum/5lil PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5lil ProSAT]</span></td></tr>
 </table>
 == Function ==
-[[http://www.uniprot.org/uniprot/MACB_AGGAC MACB_AGGAC]] Part of the tripartite efflux system MacAB-TdeA. MacB is a non-canonical ABC transporter that contains transmembrane domains (TMD), which form a pore in the inner membrane, and an ATP-binding domain (NBD), which is responsible for energy generation. Confers resistance against macrolides.<ref>PMID:19432486</ref>
+[https://www.uniprot.org/uniprot/MACB_AGGAC MACB_AGGAC] Part of the tripartite efflux system MacAB-TdeA. MacB is a non-canonical ABC transporter that contains transmembrane domains (TMD), which form a pore in the inner membrane, and an ATP-binding domain (NBD), which is responsible for energy generation. Confers resistance against macrolides.<ref>PMID:19432486</ref>
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==
@@ Line 22: / Line 23: @@
 __TOC__
 </StructureSection>
-[[Category: Crow, A]]
+[[Category: Aggregatibacter actinomycetemcomitans]]
-[[Category: Membrane protein abc transporter]]
+[[Category: Large Structures]]
-[[Category: Transport protein]]
+[[Category: Crow A]]

5lil

From Proteopedia

Current revision

Structure of Aggregatibacter actinomycetemcomitans MacB bound to ATPyS (P21)

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox