1eum: Difference between revisions

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


{{Structure
==CRYSTAL STRUCTURE OF THE E.COLI FERRITIN ECFTNA==
|PDB= 1eum |SIZE=350|CAPTION= <scene name='initialview01'>1eum</scene>, resolution 2.05&Aring;
<StructureSection load='1eum' size='340' side='right'caption='[[1eum]], [[Resolution|resolution]] 2.05&Aring;' scene=''>
|SITE=  
== Structural highlights ==
|LIGAND=  
<table><tr><td colspan='2'>[[1eum]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EUM OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1EUM FirstGlance]. <br>
|ACTIVITY=  
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.05&#8491;</td></tr>
|GENE=  
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1eum FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1eum OCA], [https://pdbe.org/1eum PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1eum RCSB], [https://www.ebi.ac.uk/pdbsum/1eum PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1eum ProSAT]</span></td></tr>
|DOMAIN=
</table>
|RELATEDENTRY=
== Function ==
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1eum FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1eum OCA], [http://www.ebi.ac.uk/pdbsum/1eum PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1eum RCSB]</span>
[https://www.uniprot.org/uniprot/FTNA_ECOLI FTNA_ECOLI] Iron-storage protein.
}}
== 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/eu/1eum_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=1eum ConSurf].
<div style="clear:both"></div>


'''CRYSTAL STRUCTURE OF THE E.COLI FERRITIN ECFTNA'''
==See Also==
 
*[[Ferritin 3D structures|Ferritin 3D structures]]
 
__TOC__
==Overview==
</StructureSection>
The high-resolution structure of the non-haem ferritin from Escherichia coli (EcFtnA) is presented together with those of its Fe(3+) and Zn(2+) derivatives, this being the first high-resolution X-ray analysis of the iron centres in any ferritin.The binding of both metals is accompanied by small changes in the amino acid ligand positions. Mean Fe(A)(3+)-Fe(B)(3+) and Zn(A)(2+)-Zn(B)(2+) distances are 3.24 A and 3.43 A, respectively. In both derivatives, metal ions at sites A and B are bridged by a glutamate side-chain (Glu50) in a syn-syn conformation. The Fe(3+) derivative alone shows a third metal site (Fe( C)( 3+)) joined to Fe(B)(3+) by a long anti-anti bidentate bridge through Glu130 (mean Fe(B)(3+)-Fe(C)(3+) distance 5.79 A). The third metal site is unique to the non-haem bacterial ferritins.The dinuclear site lies at the inner end of a hydrophobic channel connecting it to the outside surface of the protein shell, which may provide access for dioxygen and possibly for metal ions shielded by water. Models representing the possible binding mode of dioxygen to the dinuclear Fe(3+) pair suggest that a gauche micro-1,2 mode may be preferred stereochemically.Like those of other ferritins, the 24 subunits of EcFtnA are folded as four-helix bundles that assemble into hollow shells and both metals bind at dinuclear centres in the middle of the bundles. The structural similarity of EcFtnA to the human H chain ferritin (HuHF) is remarkable (r.m.s. deviation of main-chain atoms 0.66 A) given the low amino acid sequence identity (22 %). Many of the conserved residues are clustered at the dinuclear centre but there is very little conservation of residues making inter-subunit interactions.
 
==About this Structure==
1EUM is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1EUM OCA].
 
==Reference==
The high-resolution X-ray crystallographic structure of the ferritin (EcFtnA) of Escherichia coli; comparison with human H ferritin (HuHF) and the structures of the Fe(3+) and Zn(2+) derivatives., Stillman TJ, Hempstead PD, Artymiuk PJ, Andrews SC, Hudson AJ, Treffry A, Guest JR, Harrison PM, J Mol Biol. 2001 Mar 23;307(2):587-603. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11254384 11254384]
[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
[[Category: Single protein]]
[[Category: Large Structures]]
[[Category: Andrews, S C.]]
[[Category: Andrews SC]]
[[Category: Artymiuk, P J.]]
[[Category: Artymiuk PJ]]
[[Category: Guest, J R.]]
[[Category: Guest JR]]
[[Category: Harrison, P M.]]
[[Category: Harrison PM]]
[[Category: Hempstead, P D.]]
[[Category: Hempstead PD]]
[[Category: Hudson, A J.]]
[[Category: Hudson AJ]]
[[Category: Stillman, T J.]]
[[Category: Stillman TJ]]
[[Category: Treffry, A.]]
[[Category: Treffry A]]
[[Category: e coli non heme ferritin]]
[[Category: ecftna]]
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 20:09:58 2008''

Latest revision as of 10:07, 7 February 2024

CRYSTAL STRUCTURE OF THE E.COLI FERRITIN ECFTNACRYSTAL STRUCTURE OF THE E.COLI FERRITIN ECFTNA

Structural highlights

1eum is a 6 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.05Å
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

FTNA_ECOLI Iron-storage protein.

Evolutionary Conservation

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

See Also

1eum, resolution 2.05Å

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