This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.

Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.

4h44

From Proteopedia

(Difference between revisions)

Jump to: navigation, search

Revision as of 07:58, 3 November 2022

2.70 A Cytochrome b6f Complex Structure From Nostoc PCC 7120

Structural highlights

4h44 is a 8 chain structure with sequence from Nostoc sp. PCC 7120 = FACHB-418. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, , , , , , , , , , ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

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).

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 See Also
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/4h44"

@@ Line 3: / Line 3: @@
 <StructureSection load='4h44' size='340' side='right'caption='[[4h44]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[4h44]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Nostoc Nostoc]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4H44 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4H44 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[4h44]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Nostoc_sp._PCC_7120_=_FACHB-418 Nostoc sp. PCC 7120 = FACHB-418]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4H44 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4H44 FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=7PH:(1R)-2-(DODECANOYLOXY)-1-[(PHOSPHONOOXY)METHYL]ETHYL+TETRADECANOATE'>7PH</scene>, <scene name='pdbligand=8K6:OCTADECANE'>8K6</scene>, <scene name='pdbligand=BCR:BETA-CAROTENE'>BCR</scene>, <scene name='pdbligand=CD:CADMIUM+ION'>CD</scene>, <scene name='pdbligand=CLA:CHLOROPHYLL+A'>CLA</scene>, <scene name='pdbligand=FES:FE2/S2+(INORGANIC)+CLUSTER'>FES</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=MYS:PENTADECANE'>MYS</scene>, <scene name='pdbligand=OCT:N-OCTANE'>OCT</scene>, <scene name='pdbligand=OPC:(7R,17E)-4-HYDROXY-N,N,N,7-TETRAMETHYL-7-[(8E)-OCTADEC-8-ENOYLOXY]-10-OXO-3,5,9-TRIOXA-4-PHOSPHAHEPTACOS-17-EN-1-AMINIUM+4-OXIDE'>OPC</scene>, <scene name='pdbligand=SQD:1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL'>SQD</scene>, <scene name='pdbligand=UMQ:UNDECYL-MALTOSIDE'>UMQ</scene></td></tr>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=7PH:(1R)-2-(DODECANOYLOXY)-1-[(PHOSPHONOOXY)METHYL]ETHYL+TETRADECANOATE'>7PH</scene>, <scene name='pdbligand=8K6:OCTADECANE'>8K6</scene>, <scene name='pdbligand=BCR:BETA-CAROTENE'>BCR</scene>, <scene name='pdbligand=CD:CADMIUM+ION'>CD</scene>, <scene name='pdbligand=CLA:CHLOROPHYLL+A'>CLA</scene>, <scene name='pdbligand=FES:FE2/S2+(INORGANIC)+CLUSTER'>FES</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=MYS:PENTADECANE'>MYS</scene>, <scene name='pdbligand=OCT:N-OCTANE'>OCT</scene>, <scene name='pdbligand=OPC:(7R,17E)-4-HYDROXY-N,N,N,7-TETRAMETHYL-7-[(8E)-OCTADEC-8-ENOYLOXY]-10-OXO-3,5,9-TRIOXA-4-PHOSPHAHEPTACOS-17-EN-1-AMINIUM+4-OXIDE'>OPC</scene>, <scene name='pdbligand=SQD:1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL'>SQD</scene>, <scene name='pdbligand=UMQ:UNDECYL-MALTOSIDE'>UMQ</scene></td></tr>
-<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='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4h44 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4h44 OCA], [https://pdbe.org/4h44 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4h44 RCSB], [https://www.ebi.ac.uk/pdbsum/4h44 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4h44 ProSAT]</span></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://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 ==
-[[http://www.uniprot.org/uniprot/PETM_NOSS1 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). [[http://www.uniprot.org/uniprot/CYF_NOSS1 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). [[http://www.uniprot.org/uniprot/PETG_NOSS1 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). [[http://www.uniprot.org/uniprot/PETD_NOSS1 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). [[http://www.uniprot.org/uniprot/PETN_NOSS1 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). [[http://www.uniprot.org/uniprot/CYB6_NOSS1 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). [[http://www.uniprot.org/uniprot/UCRIA_NOSS1 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). [[http://www.uniprot.org/uniprot/PETL_NOSS1 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).
+[https://www.uniprot.org/uniprot/CYB6_NOSS1 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).
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==
@@ Line 23: / Line 21: @@
 ==See Also==
 *[[Cytochrome b6|Cytochrome b6]]
-*[[Cytochrome f|Cytochrome f]]
 == References ==
 <references/>
@@ Line 29: / Line 26: @@
 </StructureSection>
 [[Category: Large Structures]]
-[[Category: Nostoc]]
+[[Category: Nostoc sp. PCC 7120 = FACHB-418]]
-[[Category: Plastoquinol--plastocyanin reductase]]
+[[Category: Baniulis D]]
-[[Category: Baniulis, D]]
+[[Category: Cramer WA]]
-[[Category: Cramer, W A]]
+[[Category: Hasan SS]]
-[[Category: Hasan, S S]]
+[[Category: Yamashita E]]
-[[Category: Yamashita, E]]
-[[Category: Alpha helix]]
-[[Category: Beta-sheet]]
-[[Category: Photosynthesis]]
-[[Category: Plastocyanin]]
-[[Category: Plastoquinol-plastocyanin oxidoreductase]]
-[[Category: Thylakoid membrane]]

4h44

From Proteopedia

Revision as of 07:58, 3 November 2022

2.70 A Cytochrome b6f Complex Structure From Nostoc PCC 7120

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

Personal tools

Navigation

Search

Toolbox