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1yeb

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Revision as of 14:50, 3 March 2021

STRUCTURE DETERMINATION AND ANALYSIS OF YEAST ISO-2-CYTOCHROME C AND A COMPOSITE MUTANT PROTEIN

Structural highlights

1yeb is a 1 chain structure with sequence from Atcc 18824. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
NonStd Res:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[CYC7_YEAST] Electron carrier protein. The oxidized form of the cytochrome c heme group can accept an electron from the heme group of the cytochrome c1 subunit of cytochrome reductase. Cytochrome c then transfers this electron to the cytochrome oxidase complex, the final protein carrier in the mitochondrial electron-transport chain.

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

As part of a study of protein folding and stability, the three-dimensional structures of yeast iso-2-cytochrome c and a composite protein (B-2036) composed of primary sequences of both iso-1 and iso-2-cytochromes c have been solved to 1.9 A and 1.95 A resolutions, respectively, using X-ray diffraction techniques. The sequences of iso-1 and iso-2-cytochrome c share approximately 84% identity and the B-2036 composite protein has residues 15 to 63 from iso-2-cytochrome c with the rest being derived form the iso-1 protein. Comparison of these structures reveals that amino acid substitutions result in alterations in the details of intramolecular interactions. Specifically, the substitution Leu98Met results in the filling of an internal cavity present in iso-1-cytochrome c. Further substitutions of Val20Ile and Cys102Ala alter the packing of secondary structure elements in the iso-2 protein. Blending the isozymic amino acid sequences in this latter area results in the expansion of the volume of an internal cavity in the B-2036 structure to relieve a steric clash between Ile20 and Cys102. Modification of hydrogen bonding and protein packing without disrupting the protein fold is illustrated by the His26Asn and Asn63Ser substitutions between iso-1 and iso-2-cytochromes c. Alternatively, a change in main-chain fold is observed at Gly37 apparently due to a remote amino acid substitution. Further structural changes occur at Phe82 and the amino terminus where a four residue extension is present in yeast iso-2-cytochrome c. An additional comparison with all other eukaryotic cytochrome c structures determined to date is presented, along with an analysis of conserved water molecules. Also determined are the midpoint reduction potentials of iso-2 and B-2036 cytochromes c using direct electrochemistry. The values obtained are 286 and 288 mV, respectively, indicating that the amino acid substitutions present have had only a small impact on the heme reduction potential in comparison to iso-1-cytochrome c, which has a reduction potential of 290 mV.

Structure determination and analysis of yeast iso-2-cytochrome c and a composite mutant protein.,Murphy ME, Nall BT, Brayer GD J Mol Biol. 1992 Sep 5;227(1):160-76. PMID:1326054^[1]

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

References

↑ Murphy ME, Nall BT, Brayer GD. Structure determination and analysis of yeast iso-2-cytochrome c and a composite mutant protein. J Mol Biol. 1992 Sep 5;227(1):160-76. PMID:1326054

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

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

Categories: Atcc 18824 | Large Structures | Brayer, G D | Murphy, M E.P | Electron transport

@@ Line 3: / Line 3: @@
 <StructureSection load='1yeb' size='340' side='right'caption='[[1yeb]], [[Resolution|resolution]] 1.95&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1yeb]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_18824 Atcc 18824]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1YEB OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1YEB FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1yeb]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Atcc_18824 Atcc 18824]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1YEB OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1YEB 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=SO4:SULFATE+ION'>SO4</scene></td></tr>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=HEC:HEME+C'>HEC</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
 <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=M3L:N-TRIMETHYLLYSINE'>M3L</scene></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=1yeb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1yeb OCA], [http://pdbe.org/1yeb PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1yeb RCSB], [http://www.ebi.ac.uk/pdbsum/1yeb PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1yeb ProSAT]</span></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=1yeb FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1yeb OCA], [https://pdbe.org/1yeb PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1yeb RCSB], [https://www.ebi.ac.uk/pdbsum/1yeb PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1yeb ProSAT]</span></td></tr>
 </table>
 == Function ==
-[[http://www.uniprot.org/uniprot/CYC7_YEAST CYC7_YEAST]] Electron carrier protein. The oxidized form of the cytochrome c heme group can accept an electron from the heme group of the cytochrome c1 subunit of cytochrome reductase. Cytochrome c then transfers this electron to the cytochrome oxidase complex, the final protein carrier in the mitochondrial electron-transport chain.
+[[https://www.uniprot.org/uniprot/CYC7_YEAST CYC7_YEAST]] Electron carrier protein. The oxidized form of the cytochrome c heme group can accept an electron from the heme group of the cytochrome c1 subunit of cytochrome reductase. Cytochrome c then transfers this electron to the cytochrome oxidase complex, the final protein carrier in the mitochondrial electron-transport chain.
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]

1yeb

From Proteopedia

Revision as of 14:50, 3 March 2021

STRUCTURE DETERMINATION AND ANALYSIS OF YEAST ISO-2-CYTOCHROME C AND A COMPOSITE MUTANT PROTEIN

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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