1m74: Difference between revisions

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[[Image:1m74.gif|left|200px]]


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==Crystal structure of Mg-ADP-bound SecA from Bacillus subtilis==
The line below this paragraph, containing "STRUCTURE_1m74", creates the "Structure Box" on the page.
<StructureSection load='1m74' size='340' side='right'caption='[[1m74]], [[Resolution|resolution]] 3.00&Aring;' scene=''>
You may change the PDB parameter (which sets the PDB file loaded into the applet)
== Structural highlights ==
or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
<table><tr><td colspan='2'>[[1m74]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Bacillus_subtilis Bacillus subtilis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1M74 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1M74 FirstGlance]. <br>
or leave the SCENE parameter empty for the default display.
</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&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ADP:ADENOSINE-5-DIPHOSPHATE'>ADP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
{{STRUCTURE_1m74| PDB=1m74 |  SCENE= }}
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1m74 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1m74 OCA], [https://pdbe.org/1m74 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1m74 RCSB], [https://www.ebi.ac.uk/pdbsum/1m74 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1m74 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/SECA_BACSU SECA_BACSU] Part of the Sec protein translocase complex. Interacts with the SecYEG preprotein conducting channel. Has a central role in coupling the hydrolysis of ATP to the transfer of proteins into and across the cell membrane, serving as an ATP-driven molecular motor driving the stepwise translocation of polypeptide chains across the membrane (By similarity).[HAMAP-Rule:MF_01382]
== 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/m7/1m74_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.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=1m74 ConSurf].
<div style="clear:both"></div>


'''Crystal structure of Mg-ADP-bound SecA from Bacillus subtilis'''
==See Also==
 
*[[Preprotein translocase 3D structures|Preprotein translocase 3D structures]]
 
*[[SecA|SecA]]
==Overview==
__TOC__
The SecA adenosine triphosphatase (ATPase) mediates extrusion of the amino termini of secreted proteins from the eubacterial cytosol based on cycles of reversible binding to the SecYEG translocon. We have determined the crystal structure of SecA with and without magnesium-adenosine diphosphate bound to the high-affinity ATPase site at 3.0 and 2.7 angstrom resolution, respectively. Candidate sites for preprotein binding are located on a surface containing the SecA epitopes exposed to the periplasm upon binding to SecYEG and are thus positioned to deliver preprotein to SecYEG. Comparisons with structurally related ATPases, including superfamily I and II ATP-dependent helicases, suggest that the interaction geometry of the tandem motor domains in SecA is modulated by nucleotide binding, which is shown by fluorescence anisotropy experiments to reverse an endothermic domain-dissociation reaction hypothesized to gate binding to SecYEG.
</StructureSection>
 
==About this Structure==
1M74 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Bacillus_subtilis Bacillus subtilis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1M74 OCA].
 
==Reference==
Nucleotide control of interdomain interactions in the conformational reaction cycle of SecA., Hunt JF, Weinkauf S, Henry L, Fak JJ, McNicholas P, Oliver DB, Deisenhofer J, Science. 2002 Sep 20;297(5589):2018-26. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/12242434 12242434]
[[Category: Bacillus subtilis]]
[[Category: Bacillus subtilis]]
[[Category: Single protein]]
[[Category: Large Structures]]
[[Category: Deisenhofer, J.]]
[[Category: Deisenhofer J]]
[[Category: Fak, J J.]]
[[Category: Fak JJ]]
[[Category: Henry, L.]]
[[Category: Henry L]]
[[Category: Hunt, J F.]]
[[Category: Hunt JF]]
[[Category: McNicholas, P.]]
[[Category: McNicholas P]]
[[Category: Oliver, D B.]]
[[Category: Oliver DB]]
[[Category: Weinkauf, S.]]
[[Category: Weinkauf S]]
[[Category: Atpase]]
[[Category: Helicase family structure]]
[[Category: Mechanochemisty]]
[[Category: Protein translocation]]
[[Category: Transmembrane transport]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May  3 00:43:04 2008''

Latest revision as of 10:40, 14 February 2024

Crystal structure of Mg-ADP-bound SecA from Bacillus subtilisCrystal structure of Mg-ADP-bound SecA from Bacillus subtilis

Structural highlights

1m74 is a 1 chain structure with sequence from Bacillus subtilis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 3Å
Ligands:, ,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

SECA_BACSU Part of the Sec protein translocase complex. Interacts with the SecYEG preprotein conducting channel. Has a central role in coupling the hydrolysis of ATP to the transfer of proteins into and across the cell membrane, serving as an ATP-driven molecular motor driving the stepwise translocation of polypeptide chains across the membrane (By similarity).[HAMAP-Rule:MF_01382]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

See Also

1m74, resolution 3.00Å

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