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3h34

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Revision as of 09:30, 25 October 2017

PpcE, A cytochrome c7 from Geobacter sulfurreducens

Structural highlights

3h34 is a 1 chain structure with sequence from Atcc 51573. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	1os6, 3bxu, 3h33
Gene:	cyd-5, GSU1760 (ATCC 51573)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

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

Periplasmic cytochromes c(7) are important in electron transfer pathway(s) in Fe(III) respiration by Geobacter sulfurreducens. The genome of G. sulfurreducens encodes a family of five 10-kDa, three-heme cytochromes c(7). The sequence identity between the five proteins (designated PpcA, PpcB, PpcC, PpcD, and PpcE) varies between 45% and 77%. Here, we report the high-resolution structures of PpcC, PpcD, and PpcE determined by X-ray diffraction. This new information made it possible to compare the sequences and structures of the entire family. The triheme cores are largely conserved but are not identical. We observed changes, due to different crystal packing, in the relative positions of the hemes between two molecules in the crystal. The overall protein fold of the cytochromes is similar. The structure of PpcD differs most from that of the other homologs, which is not obvious from the sequence comparisons of the family. Interestingly, PpcD is the only cytochrome c(7) within the family that has higher abundance when G. sulfurreducens is grown on insoluble Fe(III) oxide compared to ferric citrate. The structures have the highest degree of conservation around "heme IV"; the protein surface around this heme is positively charged in all of the proteins, and therefore all cytochromes c(7) could interact with similar molecules involving this region. The structures and surface characteristics of the proteins near the other two hemes, "heme I" and "heme III", differ within the family. The above observations suggest that each of the five cytochromes c(7) could interact with its own redox partner via an interface involving the regions of heme I and/or heme III; this provides a possible rationalization for the existence of five similar proteins in G. sulfurreducens.

Structural characterization of a family of cytochromes c(7) involved in Fe(III) respiration by Geobacter sulfurreducens.,Pokkuluri PR, Londer YY, Yang X, Duke NE, Erickson J, Orshonsky V, Johnson G, Schiffer M Biochim Biophys Acta. 2010 Feb;1797(2):222-32. Epub 2009 Oct 24. PMID:19857457^[1]

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

References

↑ Pokkuluri PR, Londer YY, Yang X, Duke NE, Erickson J, Orshonsky V, Johnson G, Schiffer M. Structural characterization of a family of cytochromes c(7) involved in Fe(III) respiration by Geobacter sulfurreducens. Biochim Biophys Acta. 2010 Feb;1797(2):222-32. Epub 2009 Oct 24. PMID:19857457 doi:10.1016/j.bbabio.2009.10.007

1 Structural highlights
2 Evolutionary Conservation
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/3h34"

@@ Line 1: / Line 1: @@
 ==PpcE, A cytochrome c7 from Geobacter sulfurreducens==
 <StructureSection load='3h34' size='340' side='right' caption='[[3h34]], [[Resolution|resolution]] 1.60&Aring;' scene=''>
@@ Line 6: / Line 7: @@
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1os6|1os6]], [[3bxu|3bxu]], [[3h33|3h33]]</td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">cyd-5, GSU1760 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=35554 ATCC 51573])</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=3h34 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3h34 OCA], [http://pdbe.org/3h34 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3h34 RCSB], [http://www.ebi.ac.uk/pdbsum/3h34 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=3h34 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3h34 OCA], [http://pdbe.org/3h34 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3h34 RCSB], [http://www.ebi.ac.uk/pdbsum/3h34 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3h34 ProSAT]</span></td></tr>
 </table>
 == Evolutionary Conservation ==
@@ Line 27: / Line 28: @@
 </div>
 <div class="pdbe-citations 3h34" style="background-color:#fffaf0;"></div>
-==See Also==
-*[[Cytochrome c|Cytochrome c]]
 == References ==
 <references/>

3h34

From Proteopedia

Revision as of 09:30, 25 October 2017

PpcE, A cytochrome c7 from Geobacter sulfurreducens

Structural highlights

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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