1dkh

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(Difference between revisions)

Revision as of 11:24, 10 September 2015

CRYSTAL STRUCTURE OF THE HEMOPHORE HASA, PH 6.5

Structural highlights

1dkh is a 1 chain structure with sequence from "bacillus_marcescens"_(bizio_1823)_trevisan_in_de_toni_and_trevisan_1889 "bacillus marcescens" (bizio 1823) trevisan in de toni and trevisan 1889. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, ,
Related:	1b2v, 1dk0
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum

Function

[HASA_SERMA] Can bind free heme and also acquire it from hemoglobin. Conveys heme from hemoglobin to the HasR receptor which releases it into the bacterium. HasR alone can take up heme but the synergy between HasA and HasR increases heme uptake 100-fold.^[1] ^[2]

Evolutionary Conservation

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

Publication Abstract from PubMed

The protein HasA from the Gram negative bacteria Serratia marcescens is the first hemophore to be described at the molecular level. It participates to the shuttling of heme from hemoglobin to the outer membrane receptor HasR, which in turn releases it into the bacterium. HasR alone is also able to take up heme from hemoglobin but synergy with HasA increases the efficiency of the system by a factor of about 100. This iron acquisition system allows the bacteria to survive with hemoglobin as the sole iron source. Here we report the structures of a new crystal form of HasA diffracting up to 1.77A resolution as well as the refined structure of the trigonal crystal form diffracting to 3.2A resolution. The crystal structure of HasA at high resolution shows two possible orientations of the heme within the heme-binding pocket, which probably are functionally involved in the heme-iron acquisition process. The detailed analysis of the three known structures reveals the molecular basis regulating the relative affinity of the heme/hemophore complex.

Functional aspects of the heme bound hemophore HasA by structural analysis of various crystal forms.,Arnoux P, Haser R, Izadi-Pruneyre N, Lecroisey A, Czjzek M Proteins. 2000 Nov 1;41(2):202-10. PMID:10966573^[3]

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

References

↑ Letoffe S, Ghigo JM, Wandersman C. Iron acquisition from heme and hemoglobin by a Serratia marcescens extracellular protein. Proc Natl Acad Sci U S A. 1994 Oct 11;91(21):9876-80. PMID:7937909
↑ Ghigo JM, Letoffe S, Wandersman C. A new type of hemophore-dependent heme acquisition system of Serratia marcescens reconstituted in Escherichia coli. J Bacteriol. 1997 Jun;179(11):3572-9. PMID:9171402
↑ Arnoux P, Haser R, Izadi-Pruneyre N, Lecroisey A, Czjzek M. Functional aspects of the heme bound hemophore HasA by structural analysis of various crystal forms. Proteins. 2000 Nov 1;41(2):202-10. PMID:10966573

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1dkh"

@@ Line 2: / Line 2: @@
 <StructureSection load='1dkh' size='340' side='right' caption='[[1dkh]], [[Resolution|resolution]] 3.20&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1dkh]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Serratia_marcescens Serratia marcescens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DKH OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1DKH FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1dkh]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_marcescens"_(bizio_1823)_trevisan_in_de_toni_and_trevisan_1889 "bacillus marcescens" (bizio 1823) trevisan in de toni and trevisan 1889]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DKH OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1DKH FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=SM:SAMARIUM+(III)+ION'>SM</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1b2v|1b2v]], [[1dk0|1dk0]]</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=1dkh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dkh OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1dkh RCSB], [http://www.ebi.ac.uk/pdbsum/1dkh PDBsum]</span></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=1dkh FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1dkh OCA], [http://pdbe.org/1dkh PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1dkh RCSB], [http://www.ebi.ac.uk/pdbsum/1dkh PDBsum]</span></td></tr>
 </table>
 == Function ==
@@ Line 27: / Line 27: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 1dkh" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>
 __TOC__
 </StructureSection>
-[[Category: Serratia marcescens]]
 [[Category: Arnoux, P]]
 [[Category: Czjzek, M]]

1dkh

From Proteopedia

Revision as of 11:24, 10 September 2015

CRYSTAL STRUCTURE OF THE HEMOPHORE HASA, PH 6.5

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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