1cyf: Difference between revisions

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[[Image:1cyf.jpg|left|200px]]


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==IDENTIFYING THE PHYSIOLOGICAL ELECTRON TRANSFER SITE OF CYTOCHROME C PEROXIDASE BY STRUCTURE-BASED ENGINEERING==
The line below this paragraph, containing "STRUCTURE_1cyf", creates the "Structure Box" on the page.
<StructureSection load='1cyf' size='340' side='right'caption='[[1cyf]], [[Resolution|resolution]] 2.35&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'>[[1cyf]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CYF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1CYF 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]] 2.35&#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=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene></td></tr>
{{STRUCTURE_1cyf| PDB=1cyf |  SCENE= }}
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1cyf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1cyf OCA], [https://pdbe.org/1cyf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1cyf RCSB], [https://www.ebi.ac.uk/pdbsum/1cyf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1cyf ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/CCPR_YEAST CCPR_YEAST] Destroys radicals which are normally produced within the cells and which are toxic to biological systems.
== 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/cy/1cyf_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=1cyf ConSurf].
<div style="clear:both"></div>


'''IDENTIFYING THE PHYSIOLOGICAL ELECTRON TRANSFER SITE OF CYTOCHROME C PEROXIDASE BY STRUCTURE-BASED ENGINEERING'''
==See Also==
 
*[[Cytochrome c peroxidase 3D structures|Cytochrome c peroxidase 3D structures]]
 
__TOC__
==Overview==
</StructureSection>
A technique was developed to evaluate whether electron transfer (ET) complexes formed in solution by the cloned cytochrome c peroxidase [CcP(MI)] and cytochromes c from yeast (yCc) and horse (hCc) are structurally similar to those seen in the respective crystal structures. Site-directed mutagenesis was used to convert the sole Cys of the parent enzyme (Cys 128) to Ala, and a Cys residue was introduced at position 193 of CcP(MI), the point of closest contact between CcP(MI) and yCc in the crystal structure. Cys 193 was then modified with a bulky sulfhydryl reagent, 3-(N-maleimidylpropionyl)-biocytin (MPB), to prevent yCc from binding at the site seen in the crystal. The MPB modification has no effect on overall enzyme structure but causes 20-100-fold decreases in transient and steady-state ET reaction rates with yCc. The MPB modification causes only 2-3-fold decreases in ET reaction rates with hCc, however. This differential effect is predicted by modeling studies based on the crystal structures and indicates that solution phase ET complexes closely resemble the crystalline complexes. The low rate of catalysis of the MPB-enzyme was constant for yCc in buffers of 20-160 mM ionic strength. This indicates that the low affinity complex formed between CcP(MI) and yCc at low ionic strength is not reactive in ET.
[[Category: Large Structures]]
 
==About this Structure==
1CYF is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CYF OCA].
 
==Reference==
Identifying the physiological electron transfer site of cytochrome c peroxidase by structure-based engineering., Miller MA, Geren L, Han GW, Saunders A, Beasley J, Pielak GJ, Durham B, Millett F, Kraut J, Biochemistry. 1996 Jan 23;35(3):667-73. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/8547245 8547245]
[[Category: Cytochrome-c peroxidase]]
[[Category: Saccharomyces cerevisiae]]
[[Category: Saccharomyces cerevisiae]]
[[Category: Single protein]]
[[Category: Han GW]]
[[Category: Han, G W.]]
[[Category: Kraut J]]
[[Category: Kraut, J.]]
[[Category: Miller MA]]
[[Category: Miller, M A.]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May  2 13:14:41 2008''

Latest revision as of 09:46, 7 February 2024

IDENTIFYING THE PHYSIOLOGICAL ELECTRON TRANSFER SITE OF CYTOCHROME C PEROXIDASE BY STRUCTURE-BASED ENGINEERINGIDENTIFYING THE PHYSIOLOGICAL ELECTRON TRANSFER SITE OF CYTOCHROME C PEROXIDASE BY STRUCTURE-BASED ENGINEERING

Structural highlights

1cyf is a 1 chain structure with sequence from Saccharomyces cerevisiae. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.35Å
Ligands:
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

CCPR_YEAST Destroys radicals which are normally produced within the cells and which are toxic to biological systems.

Evolutionary Conservation

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

See Also

1cyf, resolution 2.35Å

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