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4h44

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Revision as of 11:30, 5 August 2016

2.70 A Cytochrome b6f Complex Structure From Nostoc PCC 7120

Structural highlights

4h44 is a 8 chain structure with sequence from Anabaena 7120. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, , , , , , , , , , ,
Related:	4h0l, 4h13, 2zt9, 2e74, 2e75, 2e76, 1vf5, 2d2c, 1q90
Activity:	Plastoquinol--plastocyanin reductase, with EC number 1.10.9.1
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[PETM_NOSS1] Component of the cytochrome b6-f complex, which mediates electron transfer between photosystem II (PSII) and photosystem I (PSI), cyclic electron flow around PSI, and state transitions (By similarity). [CYF_NOSS1] Component of the cytochrome b6-f complex, which mediates electron transfer between photosystem II (PSII) and photosystem I (PSI), cyclic electron flow around PSI, and state transitions (By similarity). [PETG_NOSS1] Component of the cytochrome b6-f complex, which mediates electron transfer between photosystem II (PSII) and photosystem I (PSI), cyclic electron flow around PSI, and state transitions. PetG is required for either the stability or assembly of the cytochrome b6-f complex (By similarity). [PETD_NOSS1] Component of the cytochrome b6-f complex, which mediates electron transfer between photosystem II (PSII) and photosystem I (PSI), cyclic electron flow around PSI, and state transitions (By similarity). [PETN_NOSS1] Component of the cytochrome b6-f complex, which mediates electron transfer between photosystem II (PSII) and photosystem I (PSI), cyclic electron flow around PSI, and state transitions (By similarity). [CYB6_NOSS1] Component of the cytochrome b6-f complex, which mediates electron transfer between photosystem II (PSII) and photosystem I (PSI), cyclic electron flow around PSI, and state transitions (By similarity). [UCRIA_NOSS1] Component of the cytochrome b6-f complex, which mediates electron transfer between photosystem II (PSII) and photosystem I (PSI), cyclic electron flow around PSI, and state transitions (By similarity). [PETL_NOSS1] Component of the cytochrome b6-f complex, which mediates electron transfer between photosystem II (PSII) and photosystem I (PSI), cyclic electron flow around PSI, and state transitions. PetL is important for photoautotrophic growth as well as for electron transfer efficiency and stability of the cytochrome b6-f complex (By similarity).

Publication Abstract from PubMed

As much as two-thirds of the proton gradient used for transmembrane free energy storage in oxygenic photosynthesis is generated by the cytochrome bf complex. The proton uptake pathway from the electrochemically negative (n) aqueous phase to the n-side quinone binding site of the complex, and a probable route for proton exit to the positive phase resulting from quinol oxidation, are defined in a 2.70-A crystal structure and in structures with quinone analog inhibitors at 3.07 A (tridecyl-stigmatellin) and 3.25-A (2-nonyl-4-hydroxyquinoline N-oxide) resolution. The simplest n-side proton pathway extends from the aqueous phase via Asp20 and Arg207 (cytochrome b subunit) to quinone bound axially to heme c. On the positive side, the heme-proximal Glu78 (subunit IV), which accepts protons from plastosemiquinone, defines a route for H transfer to the aqueous phase. These pathways provide a structure-based description of the quinone-mediated proton transfer responsible for generation of the transmembrane electrochemical potential gradient in oxygenic photosynthesis.

Quinone-dependent proton transfer pathways in the photosynthetic cytochrome b6f complex.,Hasan SS, Yamashita E, Baniulis D, Cramer WA Proc Natl Acad Sci U S A. 2013 Mar 12;110(11):4297-302. doi:, 10.1073/pnas.1222248110. Epub 2013 Feb 25. PMID:23440205^[1]

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

References

↑ Hasan SS, Yamashita E, Baniulis D, Cramer WA. Quinone-dependent proton transfer pathways in the photosynthetic cytochrome b6f complex. Proc Natl Acad Sci U S A. 2013 Mar 12;110(11):4297-302. doi:, 10.1073/pnas.1222248110. Epub 2013 Feb 25. PMID:23440205 doi:http://dx.doi.org/10.1073/pnas.1222248110

1 Structural highlights
2 Function
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/4h44"

@@ Line 1: / Line 1: @@
 ==2.70 A Cytochrome b6f Complex Structure From Nostoc PCC 7120==
 <StructureSection load='4h44' size='340' side='right' caption='[[4h44]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
@@ Line 6: / Line 7: @@
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4h0l|4h0l]], [[4h13|4h13]], [[2zt9|2zt9]], [[2e74|2e74]], [[2e75|2e75]], [[2e76|2e76]], [[1vf5|1vf5]], [[2d2c|2d2c]], [[1q90|1q90]]</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Plastoquinol--plastocyanin_reductase Plastoquinol--plastocyanin reductase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.10.9.1 1.10.9.1] </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=4h44 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4h44 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4h44 RCSB], [http://www.ebi.ac.uk/pdbsum/4h44 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=4h44 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4h44 OCA], [http://pdbe.org/4h44 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4h44 RCSB], [http://www.ebi.ac.uk/pdbsum/4h44 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4h44 ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 18: / Line 19: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 4h44" style="background-color:#fffaf0;"></div>
 == References ==
 <references/>

4h44

From Proteopedia

Revision as of 11:30, 5 August 2016

2.70 A Cytochrome b6f Complex Structure From Nostoc PCC 7120

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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