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[[Image:2hg4.gif|left|200px]]
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{{STRUCTURE_2hg4|  PDB=2hg4  |  SCENE=  }}
'''Structure of the ketosynthase-acyltransferase didomain of module 5 from DEBS.'''


==Structure of the ketosynthase-acyltransferase didomain of module 5 from DEBS.==
<StructureSection load='2hg4' size='340' side='right'caption='[[2hg4]], [[Resolution|resolution]] 2.73&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2hg4]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharopolyspora_erythraea Saccharopolyspora erythraea]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2HG4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2HG4 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]] 2.73&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=2hg4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2hg4 OCA], [https://pdbe.org/2hg4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2hg4 RCSB], [https://www.ebi.ac.uk/pdbsum/2hg4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2hg4 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/ERYA3_SACER ERYA3_SACER]
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/hg/2hg4_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2hg4 ConSurf].
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The x-ray crystal structure of a 194-kDa fragment from module 5 of the 6-deoxyerythronolide B synthase has been solved at 2.7 Angstrom resolution. Each subunit of the homodimeric protein contains a full-length ketosynthase (KS) and acyl transferase (AT) domain as well as three flanking "linkers." The linkers are structurally well defined and contribute extensively to intersubunit or interdomain interactions, frequently by means of multiple highly conserved residues. The crystal structure also reveals that the active site residue Cys-199 of the KS domain is separated from the active site residue Ser-642 of the AT domain by approximately 80 Angstrom. This distance is too large to be covered simply by alternative positioning of a statically anchored, fully extended phosphopantetheine arm of the acyl carrier protein domain from module 5. Thus, substantial domain reorganization appears necessary for the acyl carrier protein to interact successively with both the AT and the KS domains of this prototypical polyketide synthase module. The 2.7-Angstrom KS-AT structure is fully consistent with a recently reported lower resolution, 4.5-Angstrom model of fatty acid synthase structure, and emphasizes the close biochemical and structural similarity between polyketide synthase and fatty acid synthase enzymology.


==Overview==
The 2.7-Angstrom crystal structure of a 194-kDa homodimeric fragment of the 6-deoxyerythronolide B synthase.,Tang Y, Kim CY, Mathews II, Cane DE, Khosla C Proc Natl Acad Sci U S A. 2006 Jul 25;103(30):11124-9. Epub 2006 Jul 14. PMID:16844787<ref>PMID:16844787</ref>
The x-ray crystal structure of a 194-kDa fragment from module 5 of the 6-deoxyerythronolide B synthase has been solved at 2.7 Angstrom resolution. Each subunit of the homodimeric protein contains a full-length ketosynthase (KS) and acyl transferase (AT) domain as well as three flanking "linkers." The linkers are structurally well defined and contribute extensively to intersubunit or interdomain interactions, frequently by means of multiple highly conserved residues. The crystal structure also reveals that the active site residue Cys-199 of the KS domain is separated from the active site residue Ser-642 of the AT domain by approximately 80 Angstrom. This distance is too large to be covered simply by alternative positioning of a statically anchored, fully extended phosphopantetheine arm of the acyl carrier protein domain from module 5. Thus, substantial domain reorganization appears necessary for the acyl carrier protein to interact successively with both the AT and the KS domains of this prototypical polyketide synthase module. The 2.7-Angstrom KS-AT structure is fully consistent with a recently reported lower resolution, 4.5-Angstrom model of fatty acid synthase structure, and emphasizes the close biochemical and structural similarity between polyketide synthase and fatty acid synthase enzymology.


==About this Structure==
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
2HG4 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Saccharopolyspora_erythraea Saccharopolyspora erythraea]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2HG4 OCA].
</div>
<div class="pdbe-citations 2hg4" style="background-color:#fffaf0;"></div>


==Reference==
==See Also==
The 2.7-Angstrom crystal structure of a 194-kDa homodimeric fragment of the 6-deoxyerythronolide B synthase., Tang Y, Kim CY, Mathews II, Cane DE, Khosla C, Proc Natl Acad Sci U S A. 2006 Jul 25;103(30):11124-9. Epub 2006 Jul 14. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16844787 16844787]
*[[6-deoxyerythronolide B synthase (DEBS)|6-deoxyerythronolide B synthase (DEBS)]]
[[Category: Erythronolide synthase]]
*[[6-deoxyerythronolide B synthase 3D structures|6-deoxyerythronolide B synthase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Saccharopolyspora erythraea]]
[[Category: Saccharopolyspora erythraea]]
[[Category: Single protein]]
[[Category: Cane DE]]
[[Category: Cane, D E.]]
[[Category: Khosla C]]
[[Category: Khosla, C.]]
[[Category: Kim CY]]
[[Category: Kim, C Y.]]
[[Category: Mathews II]]
[[Category: Mathews, I I.]]
[[Category: Tang Y]]
[[Category: Tang, Y.]]
[[Category: Acyltransferase]]
[[Category: Deb]]
[[Category: Ketosynthase]]
[[Category: Module 5]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May  4 06:15:07 2008''

Latest revision as of 09:10, 6 November 2024

Structure of the ketosynthase-acyltransferase didomain of module 5 from DEBS.

2hg4, resolution 2.73Å

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