1cfm

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[[Image:1cfm.jpg|left|200px]]
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{{Structure
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|LIGAND= <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1cfm FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1cfm OCA], [http://www.ebi.ac.uk/pdbsum/1cfm PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1cfm RCSB]</span>
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'''CYTOCHROME F FROM CHLAMYDOMONAS REINHARDTII'''
'''CYTOCHROME F FROM CHLAMYDOMONAS REINHARDTII'''
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[[Category: Malkin, R.]]
[[Category: Malkin, R.]]
[[Category: Zhang, Z.]]
[[Category: Zhang, Z.]]
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[[Category: cytochrome f]]
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[[Category: Cytochrome f]]
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[[Category: electron transport]]
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[[Category: Electron transport]]
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[[Category: heme]]
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[[Category: Heme]]
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[[Category: plastocyanin]]
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[[Category: Plastocyanin]]
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[[Category: proton wire]]
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[[Category: Proton wire]]
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Revision as of 09:41, 2 May 2008

Image:1cfm.jpg

Template:STRUCTURE 1cfm

CYTOCHROME F FROM CHLAMYDOMONAS REINHARDTII


Overview

A truncated form of cytochrome f from Chlamydomonas reinhardtii (an important eukaryotic model organism for photosynthetic electron transfer studies) has been crystallized (space group P2(1)2(1)2(1); three molecules/asymmetric unit) and its structure determined to 2.0 A resolution by molecular replacement using the coordinates of a truncated turnip cytochrome f as a model. The structure displays the same folding and detailed features as turnip cytochrome f, including (a) an unusual heme Fe ligation by the alpha-amino group of tyrosine 1, (b) a cluster of lysine residues (proposed docking site of plastocyanin), and (c) the presence of a chain of seven water molecules bound to conserved residues and extending between the heme pocket and K58 and K66 at the lysine cluster. For this array of waters, we propose a structural role. Two cytochrome f molecules are related by a noncrystallographic symmetry operator which is a distorted proper 2-fold rotation. This may represent the dimeric relation of the monomers in situ; however, the heme orientation suggested by this model is not consistent with previous EPR measurements on oriented membranes.

About this Structure

1CFM is a Single protein structure of sequence from Chlamydomonas reinhardtii. Full crystallographic information is available from OCA.

Reference

X-ray structure of a truncated form of cytochrome f from chlamydomonas reinhardtii., Chi YI, Huang LS, Zhang Z, Fernandez-Velasco JG, Berry EA, Biochemistry. 2000 Jul 4;39(26):7689-701. PMID:10869174 Page seeded by OCA on Fri May 2 12:41:01 2008

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