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.

6yca

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 10:04, 21 December 2022

Crystal structure of Eis1 from Mycobacterium abscessus

Structural highlights

6yca is a 6 chain structure with sequence from Mycobacteroides abscessus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

A0A418LDP6_9MYCO

Publication Abstract from PubMed

Enhanced intracellular survival (Eis) proteins belonging to the superfamily of the GCN5-related N-acetyltransferases play important functions in mycobacterial pathogenesis. In Mycobacterium tuberculosis, Eis enhances the intracellular survival of the bacilli in macrophages by modulating the host immune response and is capable to chemically modify and inactivate aminoglycosides. In nontuberculous mycobacteria (NTM), Eis shares similar functions. However, Mycobacterium abscessus, a multidrug resistant NTM, possesses two functionally distinct Eis homologues, Eis1Mab and Eis2Mab . While Eis2Mab participates in virulence and aminoglycosides resistance, this is not the case for Eis1Mab, whose exact biological function remains to be determined. Herein, we show that overexpression of Eis1Mab in M. abscessus fails to induce resistance to aminoglycosides. To clarify why Eis1Mab is unable to modify this class of antibiotics, we solved its crystal structure bound to its cofactor, acetyl-CoA. The structure revealed that Eis1Mab has a typical homohexameric Eis-like organization. The structural analysis supported by biochemical approaches demonstrated that while Eis1Mab can acetylate small substrates, its active site is too narrow to accommodate aminoglycosides. Comparison with other Eis structures showed that an extended loop between strands 9 and 10 is blocking the access of large substrates to the active site and movement of helices 4 and 5 reduces the volume of the substrate-binding pocket to these compounds in Eis1Mab . Overall, this study underscores the molecular determinants explaining functional differences between Eis1Mab and Eis2Mab, especially those inherent to their capacity to modify aminoglycosides.

Structural analysis of the N-acetyltransferase Eis1 from Mycobacterium abscessus reveals the molecular determinants of its incapacity to modify aminoglycosides.,Ung KL, Kremer L, Blaise M Proteins. 2020 Aug 28. doi: 10.1002/prot.25997. PMID:32860271^[1]

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

References

↑ Ung KL, Kremer L, Blaise M. Structural analysis of the N-acetyltransferase Eis1 from Mycobacterium abscessus reveals the molecular determinants of its incapacity to modify aminoglycosides. Proteins. 2020 Aug 28. doi: 10.1002/prot.25997. PMID:32860271 doi:http://dx.doi.org/10.1002/prot.25997

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/6yca"

Categories: Large Structures | Mycobacteroides abscessus | Blaise M | Ung KL

@@ Line 3: / Line 3: @@
 <StructureSection load='6yca' size='340' side='right'caption='[[6yca]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[6yca]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/"mycobacterium_abcessus"_moore_and_frerichs_1953 "mycobacterium abcessus" moore and frerichs 1953]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6YCA OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6YCA FirstGlance]. <br>
+<table><tr><td colspan='2'>[[6yca]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Mycobacteroides_abscessus Mycobacteroides abscessus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6YCA OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6YCA FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACO:ACETYL+COENZYME+*A'>ACO</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">D2E76_00625 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=36809 "Mycobacterium abcessus" Moore and Frerichs 1953])</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=6yca FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6yca OCA], [https://pdbe.org/6yca PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6yca RCSB], [https://www.ebi.ac.uk/pdbsum/6yca PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6yca ProSAT]</span></td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=6yca FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6yca OCA], [http://pdbe.org/6yca PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6yca RCSB], [http://www.ebi.ac.uk/pdbsum/6yca PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6yca ProSAT]</span></td></tr>
 </table>
+== Function ==
+[https://www.uniprot.org/uniprot/A0A418LDP6_9MYCO A0A418LDP6_9MYCO]
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==
@@ Line 21: / Line 22: @@
 __TOC__
 </StructureSection>
-[[Category: Mycobacterium abcessus moore and frerichs 1953]]
 [[Category: Large Structures]]
-[[Category: Blaise, M]]
+[[Category: Mycobacteroides abscessus]]
-[[Category: Ung, K L]]
+[[Category: Blaise M]]
-[[Category: Ei]]
+[[Category: Ung KL]]
-[[Category: Gcn5-related n-acetyltransferase]]
-[[Category: Transferase]]

6yca

From Proteopedia

Revision as of 10:04, 21 December 2022

Crystal structure of Eis1 from Mycobacterium abscessus

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox