6kig - Revision history

OCA at 02:24, 11 April 2020

OCA — Sat, 11 Apr 2020 02:24:33 GMT

←Older revision		Revision as of 02:24, 11 April 2020
Line 3:		Line 3:
	<SX load='6kig' size='340' side='right' viewer='molstar' caption='[[6kig]], [[Resolution\|resolution]] 2.90Å' scene=''>		<SX load='6kig' size='340' side='right' viewer='molstar' caption='[[6kig]], [[Resolution\|resolution]] 2.90Å' scene=''>
	== Structural highlights ==		== Structural highlights ==
-	<table><tr><td colspan='2'>[[6kig]] is a 51 chain structure with sequence from [http://en.wikipedia.org/wiki/Anacystis_nidulans_r2 Anacystis nidulans r2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6KIG OCA]. For a <b>guided tour on the structure components</b> use [http://~~oca~~.~~weizmann.ac.il/oca-docs~~/fgij/fg.htm?mol=6KIG FirstGlance]. <br>	+	<table><tr><td colspan='2'>[[6kig]] is a 51 chain structure with sequence from [http://en.wikipedia.org/wiki/Anacystis_nidulans_r2 Anacystis nidulans r2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6KIG OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6KIG FirstGlance]. <br>
-	</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BCR:BETA-CAROTENE'>BCR</scene>, <scene name='pdbligand=CLA:CHLOROPHYLL+A'>CLA</scene>, <scene name='pdbligand=LHG:1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE'>LHG</scene>, <scene name='pdbligand=LMG:1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE'>LMG</scene>, <scene name='pdbligand=LMU:DODECYL-ALPHA-D-MALTOSIDE'>LMU</scene>, <scene name='pdbligand=PQN:PHYLLOQUINONE'>PQN</scene>, <scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</scene>, <scene name='pdbligand=SQD:1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL'>SQD</scene></td></tr>	+	</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BCR:BETA-CAROTENE'>BCR</scene>, <scene name='pdbligand=CLA:CHLOROPHYLL+A'>CLA</scene>, <scene name='pdbligand=LHG:1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE'>LHG</scene>, <scene name='pdbligand=LMG:1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE'>LMG</scene>, <scene name='pdbligand=LMU:DODECYL-ALPHA-D-MALTOSIDE'>LMU</scene>, <scene name='pdbligand=PQN:PHYLLOQUINONE'>PQN</scene>, <scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</scene>, <scene name='pdbligand=SQD:1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL'>SQD</scene></td></tr>
	<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Photosystem_I Photosystem I], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.97.1.12 1.97.1.12] </span></td></tr>		<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Photosystem_I Photosystem I], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.97.1.12 1.97.1.12] </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=6kig FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6kig OCA], [http://pdbe.org/6kig PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6kig RCSB], [http://www.ebi.ac.uk/pdbsum/6kig PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6kig ProSAT]</span></td></tr>	+	<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=6kig FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6kig OCA], [http://pdbe.org/6kig PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6kig RCSB], [http://www.ebi.ac.uk/pdbsum/6kig PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6kig ProSAT]</span></td></tr>
	</table>		</table>
	== Function ==		== Function ==

OCA at 22:24, 6 March 2020

OCA — Fri, 06 Mar 2020 22:24:33 GMT

←Older revision		Revision as of 22:24, 6 March 2020
Line 1:		Line 1:

	==Structure of cyanobacterial photosystem I-IsiA supercomplex==		==Structure of cyanobacterial photosystem I-IsiA supercomplex==
-	<~~StructureSection~~ load='6kig' size='340' side='right'caption='[[6kig]], [[Resolution\|resolution]] 2.90Å' scene=''>	+	<SX load='6kig' size='340' side='right' viewer='molstar' caption='[[6kig]], [[Resolution\|resolution]] 2.90Å' scene=''>
	== Structural highlights ==		== Structural highlights ==
	<table><tr><td colspan='2'>[[6kig]] is a 51 chain structure with sequence from [http://en.wikipedia.org/wiki/Anacystis_nidulans_r2 Anacystis nidulans r2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6KIG OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6KIG FirstGlance]. <br>		<table><tr><td colspan='2'>[[6kig]] is a 51 chain structure with sequence from [http://en.wikipedia.org/wiki/Anacystis_nidulans_r2 Anacystis nidulans r2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6KIG OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6KIG FirstGlance]. <br>
Line 9:		Line 9:
	</table>		</table>
	== Function ==		== Function ==
-	[[http://www.uniprot.org/uniprot/PSAC_SYNE7 PSAC_SYNE7]] Apoprotein for the two 4Fe-4S centers FA and FB of photosystem I (PSI); essential for photochemical activity. FB is the terminal electron acceptor of PSI, donating electrons to ferredoxin. The C-terminus interacts with PsaA/B/D and helps assemble the protein into the PSI complex. Required for binding of PsaD and PsaE to PSI. PSI is a plastocyanin/cytochrome c6-ferredoxin oxidoreductase, converting photonic excitation into a charge separation, which transfers an electron from the donor P700 chlorophyll pair to the spectroscopically characterized acceptors A0, A1, FX, FA and FB in turn.[HAMAP-Rule:MF_01303] [[http://www.uniprot.org/uniprot/ISIA_SYNE7 ISIA_SYNE7]] Functions as an antenna for photosystem I (PSI) under iron-limiting conditions, when phycobilisomes disappear. Also functions as a dissipator of light energy, protecting cells from excessive light under iron-deficient conditions. Sequesters chlorophyll when cells are growing in iron-deficient conditions; it may bind up to 50% of the chlorophyll in iron-starved cells.<ref>PMID:10216865</ref> <ref>PMID:8022940</ref> <ref>PMID:11594057</ref> [[http://www.uniprot.org/uniprot/PSAB_SYNE7 PSAB_SYNE7]] PsaA and PsaB bind P700, the primary electron donor of photosystem I (PSI), as well as the electron acceptors A0, A1 and FX. PSI is a plastocyanin/cytochrome c6-ferredoxin oxidoreductase, converting photonic excitation into a charge separation, which transfers an electron from the donor P700 chlorophyll pair to the spectroscopically characterized acceptors A0, A1, FX, FA and FB in turn. Oxidized P700 is reduced on the lumenal side of the thylakoid membrane by plastocyanin or cytochrome c6. [[http://www.uniprot.org/uniprot/PSAJ_SYNE7 PSAJ_SYNE7]] May help in the organization of the PsaE and PsaF subunits.[HAMAP-Rule:MF_00522] [[http://www.uniprot.org/uniprot/PSAA_SYNE7 PSAA_SYNE7]] PsaA and PsaB bind P700, the primary electron donor of photosystem I (PSI), as well as the electron acceptors A0, A1 and FX. PSI is a plastocyanin/cytochrome c6-ferredoxin oxidoreductase, converting photonic excitation into a charge separation, which transfers an electron from the donor P700 chlorophyll pair to the spectroscopically characterized acceptors A0, A1, FX, FA and FB in turn. Oxidized P700 is reduced on the lumenal side of the thylakoid membrane by plastocyanin or cytochrome c6. [[http://www.uniprot.org/uniprot/PSAE_SYNE7 PSAE_SYNE7]] Stabilizes the interaction between PsaC and the PSI core, assists the docking of the ferredoxin to PSI and interacts with ferredoxin-NADP oxidoreductase.	+	[[http://www.uniprot.org/uniprot/PSAC_SYNE7 PSAC_SYNE7]] Apoprotein for the two 4Fe-4S centers FA and FB of photosystem I (PSI); essential for photochemical activity. FB is the terminal electron acceptor of PSI, donating electrons to ferredoxin. The C-terminus interacts with PsaA/B/D and helps assemble the protein into the PSI complex. Required for binding of PsaD and PsaE to PSI. PSI is a plastocyanin/cytochrome c6-ferredoxin oxidoreductase, converting photonic excitation into a charge separation, which transfers an electron from the donor P700 chlorophyll pair to the spectroscopically characterized acceptors A0, A1, FX, FA and FB in turn.[HAMAP-Rule:MF_01303] [[http://www.uniprot.org/uniprot/PSAB_SYNE7 PSAB_SYNE7]] PsaA and PsaB bind P700, the primary electron donor of photosystem I (PSI), as well as the electron acceptors A0, A1 and FX. PSI is a plastocyanin/cytochrome c6-ferredoxin oxidoreductase, converting photonic excitation into a charge separation, which transfers an electron from the donor P700 chlorophyll pair to the spectroscopically characterized acceptors A0, A1, FX, FA and FB in turn. Oxidized P700 is reduced on the lumenal side of the thylakoid membrane by plastocyanin or cytochrome c6. [[http://www.uniprot.org/uniprot/ISIA_SYNE7 ISIA_SYNE7]] Functions as an antenna for photosystem I (PSI) under iron-limiting conditions, when phycobilisomes disappear. Also functions as a dissipator of light energy, protecting cells from excessive light under iron-deficient conditions. Sequesters chlorophyll when cells are growing in iron-deficient conditions; it may bind up to 50% of the chlorophyll in iron-starved cells.<ref>PMID:10216865</ref> <ref>PMID:8022940</ref> <ref>PMID:11594057</ref> [[http://www.uniprot.org/uniprot/PSAJ_SYNE7 PSAJ_SYNE7]] May help in the organization of the PsaE and PsaF subunits.[HAMAP-Rule:MF_00522] [[http://www.uniprot.org/uniprot/PSAA_SYNE7 PSAA_SYNE7]] PsaA and PsaB bind P700, the primary electron donor of photosystem I (PSI), as well as the electron acceptors A0, A1 and FX. PSI is a plastocyanin/cytochrome c6-ferredoxin oxidoreductase, converting photonic excitation into a charge separation, which transfers an electron from the donor P700 chlorophyll pair to the spectroscopically characterized acceptors A0, A1, FX, FA and FB in turn. Oxidized P700 is reduced on the lumenal side of the thylakoid membrane by plastocyanin or cytochrome c6. [[http://www.uniprot.org/uniprot/PSAE_SYNE7 PSAE_SYNE7]] Stabilizes the interaction between PsaC and the PSI core, assists the docking of the ferredoxin to PSI and interacts with ferredoxin-NADP oxidoreductase.
	<div style="background-color:#fffaf0;">		<div style="background-color:#fffaf0;">
	== Publication Abstract from PubMed ==		== Publication Abstract from PubMed ==
Line 22:		Line 22:
	<references/>		<references/>
	__TOC__		__TOC__
-	</~~StructureSection~~>	+	</SX>
	[[Category: Anacystis nidulans r2]]		[[Category: Anacystis nidulans r2]]
	[[Category: Large Structures]]		[[Category: Large Structures]]

OCA at 10:22, 26 February 2020

OCA — Wed, 26 Feb 2020 10:22:08 GMT

←Older revision		Revision as of 10:22, 26 February 2020
Line 3:		Line 3:
	<StructureSection load='6kig' size='340' side='right'caption='[[6kig]], [[Resolution\|resolution]] 2.90Å' scene=''>		<StructureSection load='6kig' size='340' side='right'caption='[[6kig]], [[Resolution\|resolution]] 2.90Å' scene=''>
	== Structural highlights ==		== Structural highlights ==
-	<table><tr><td colspan='2'>[[6kig]] is a 51 chain structure with sequence from [http://en.wikipedia.org/wiki/~~Synechococcus_elongatus_(strain_pcc_7942) Synechococcus elongatus (strain pcc 7942)~~]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6KIG OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6KIG FirstGlance]. <br>	+	<table><tr><td colspan='2'>[[6kig]] is a 51 chain structure with sequence from [http://en.wikipedia.org/wiki/Anacystis_nidulans_r2 Anacystis nidulans r2]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6KIG OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6KIG FirstGlance]. <br>
	</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BCR:BETA-CAROTENE'>BCR</scene>, <scene name='pdbligand=CLA:CHLOROPHYLL+A'>CLA</scene>, <scene name='pdbligand=LHG:1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE'>LHG</scene>, <scene name='pdbligand=LMG:1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE'>LMG</scene>, <scene name='pdbligand=LMU:DODECYL-ALPHA-D-MALTOSIDE'>LMU</scene>, <scene name='pdbligand=PQN:PHYLLOQUINONE'>PQN</scene>, <scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</scene>, <scene name='pdbligand=SQD:1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL'>SQD</scene></td></tr>		</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BCR:BETA-CAROTENE'>BCR</scene>, <scene name='pdbligand=CLA:CHLOROPHYLL+A'>CLA</scene>, <scene name='pdbligand=LHG:1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE'>LHG</scene>, <scene name='pdbligand=LMG:1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE'>LMG</scene>, <scene name='pdbligand=LMU:DODECYL-ALPHA-D-MALTOSIDE'>LMU</scene>, <scene name='pdbligand=PQN:PHYLLOQUINONE'>PQN</scene>, <scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</scene>, <scene name='pdbligand=SQD:1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL'>SQD</scene></td></tr>
	<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Photosystem_I Photosystem I], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.97.1.12 1.97.1.12] </span></td></tr>		<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Photosystem_I Photosystem I], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.97.1.12 1.97.1.12] </span></td></tr>
Line 10:		Line 10:
	== Function ==		== Function ==
	[[http://www.uniprot.org/uniprot/PSAC_SYNE7 PSAC_SYNE7]] Apoprotein for the two 4Fe-4S centers FA and FB of photosystem I (PSI); essential for photochemical activity. FB is the terminal electron acceptor of PSI, donating electrons to ferredoxin. The C-terminus interacts with PsaA/B/D and helps assemble the protein into the PSI complex. Required for binding of PsaD and PsaE to PSI. PSI is a plastocyanin/cytochrome c6-ferredoxin oxidoreductase, converting photonic excitation into a charge separation, which transfers an electron from the donor P700 chlorophyll pair to the spectroscopically characterized acceptors A0, A1, FX, FA and FB in turn.[HAMAP-Rule:MF_01303] [[http://www.uniprot.org/uniprot/ISIA_SYNE7 ISIA_SYNE7]] Functions as an antenna for photosystem I (PSI) under iron-limiting conditions, when phycobilisomes disappear. Also functions as a dissipator of light energy, protecting cells from excessive light under iron-deficient conditions. Sequesters chlorophyll when cells are growing in iron-deficient conditions; it may bind up to 50% of the chlorophyll in iron-starved cells.<ref>PMID:10216865</ref> <ref>PMID:8022940</ref> <ref>PMID:11594057</ref> [[http://www.uniprot.org/uniprot/PSAB_SYNE7 PSAB_SYNE7]] PsaA and PsaB bind P700, the primary electron donor of photosystem I (PSI), as well as the electron acceptors A0, A1 and FX. PSI is a plastocyanin/cytochrome c6-ferredoxin oxidoreductase, converting photonic excitation into a charge separation, which transfers an electron from the donor P700 chlorophyll pair to the spectroscopically characterized acceptors A0, A1, FX, FA and FB in turn. Oxidized P700 is reduced on the lumenal side of the thylakoid membrane by plastocyanin or cytochrome c6. [[http://www.uniprot.org/uniprot/PSAJ_SYNE7 PSAJ_SYNE7]] May help in the organization of the PsaE and PsaF subunits.[HAMAP-Rule:MF_00522] [[http://www.uniprot.org/uniprot/PSAA_SYNE7 PSAA_SYNE7]] PsaA and PsaB bind P700, the primary electron donor of photosystem I (PSI), as well as the electron acceptors A0, A1 and FX. PSI is a plastocyanin/cytochrome c6-ferredoxin oxidoreductase, converting photonic excitation into a charge separation, which transfers an electron from the donor P700 chlorophyll pair to the spectroscopically characterized acceptors A0, A1, FX, FA and FB in turn. Oxidized P700 is reduced on the lumenal side of the thylakoid membrane by plastocyanin or cytochrome c6. [[http://www.uniprot.org/uniprot/PSAE_SYNE7 PSAE_SYNE7]] Stabilizes the interaction between PsaC and the PSI core, assists the docking of the ferredoxin to PSI and interacts with ferredoxin-NADP oxidoreductase.		[[http://www.uniprot.org/uniprot/PSAC_SYNE7 PSAC_SYNE7]] Apoprotein for the two 4Fe-4S centers FA and FB of photosystem I (PSI); essential for photochemical activity. FB is the terminal electron acceptor of PSI, donating electrons to ferredoxin. The C-terminus interacts with PsaA/B/D and helps assemble the protein into the PSI complex. Required for binding of PsaD and PsaE to PSI. PSI is a plastocyanin/cytochrome c6-ferredoxin oxidoreductase, converting photonic excitation into a charge separation, which transfers an electron from the donor P700 chlorophyll pair to the spectroscopically characterized acceptors A0, A1, FX, FA and FB in turn.[HAMAP-Rule:MF_01303] [[http://www.uniprot.org/uniprot/ISIA_SYNE7 ISIA_SYNE7]] Functions as an antenna for photosystem I (PSI) under iron-limiting conditions, when phycobilisomes disappear. Also functions as a dissipator of light energy, protecting cells from excessive light under iron-deficient conditions. Sequesters chlorophyll when cells are growing in iron-deficient conditions; it may bind up to 50% of the chlorophyll in iron-starved cells.<ref>PMID:10216865</ref> <ref>PMID:8022940</ref> <ref>PMID:11594057</ref> [[http://www.uniprot.org/uniprot/PSAB_SYNE7 PSAB_SYNE7]] PsaA and PsaB bind P700, the primary electron donor of photosystem I (PSI), as well as the electron acceptors A0, A1 and FX. PSI is a plastocyanin/cytochrome c6-ferredoxin oxidoreductase, converting photonic excitation into a charge separation, which transfers an electron from the donor P700 chlorophyll pair to the spectroscopically characterized acceptors A0, A1, FX, FA and FB in turn. Oxidized P700 is reduced on the lumenal side of the thylakoid membrane by plastocyanin or cytochrome c6. [[http://www.uniprot.org/uniprot/PSAJ_SYNE7 PSAJ_SYNE7]] May help in the organization of the PsaE and PsaF subunits.[HAMAP-Rule:MF_00522] [[http://www.uniprot.org/uniprot/PSAA_SYNE7 PSAA_SYNE7]] PsaA and PsaB bind P700, the primary electron donor of photosystem I (PSI), as well as the electron acceptors A0, A1 and FX. PSI is a plastocyanin/cytochrome c6-ferredoxin oxidoreductase, converting photonic excitation into a charge separation, which transfers an electron from the donor P700 chlorophyll pair to the spectroscopically characterized acceptors A0, A1, FX, FA and FB in turn. Oxidized P700 is reduced on the lumenal side of the thylakoid membrane by plastocyanin or cytochrome c6. [[http://www.uniprot.org/uniprot/PSAE_SYNE7 PSAE_SYNE7]] Stabilizes the interaction between PsaC and the PSI core, assists the docking of the ferredoxin to PSI and interacts with ferredoxin-NADP oxidoreductase.
		+	<div style="background-color:#fffaf0;">
		+	== Publication Abstract from PubMed ==
		+	Under iron-deficiency stress, which occurs frequently in natural aquatic environments, cyanobacteria reduce the amount of iron-enriched proteins, including photosystem I (PSI) and ferredoxin (Fd), and upregulate the expression of iron-stress-induced proteins A and B (IsiA and flavodoxin (Fld)). Multiple IsiAs function as the peripheral antennae that encircle the PSI core, whereas Fld replaces Fd as the electron receptor of PSI. Here, we report the structures of the PSI3-IsiA18-Fld3 and PSI3-IsiA18 supercomplexes from Synechococcus sp. PCC 7942, revealing features that are different from the previously reported PSI structures, and a sophisticated pigment network that involves previously unobserved pigment molecules. Spectroscopic results demonstrated that IsiAs are efficient light harvesters for PSI. Three Flds bind symmetrically to the trimeric PSI core-we reveal the detailed interaction and the electron transport path between PSI and Fld. Our results provide a structural basis for understanding the mechanisms of light harvesting, energy transfer and electron transport of cyanobacterial PSI under stressed conditions.
		+
		+	Structural basis for energy and electron transfer of the photosystem I-IsiA-flavodoxin supercomplex.,Cao P, Cao D, Si L, Su X, Tian L, Chang W, Liu Z, Zhang X, Li M Nat Plants. 2020 Feb;6(2):167-176. doi: 10.1038/s41477-020-0593-7. Epub 2020 Feb , 10. PMID:32042157<ref>PMID:32042157</ref>
		+
		+	From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
		+	</div>
		+	<div class="pdbe-citations 6kig" style="background-color:#fffaf0;"></div>
	== References ==		== References ==
	<references/>		<references/>
	__TOC__		__TOC__
	</StructureSection>		</StructureSection>
		+	[[Category: Anacystis nidulans r2]]
	[[Category: Large Structures]]		[[Category: Large Structures]]
	[[Category: Photosystem I]]		[[Category: Photosystem I]]

OCA at 04:14, 13 February 2020

OCA — Thu, 13 Feb 2020 04:14:15 GMT

←Older revision		Revision as of 04:14, 13 February 2020
Line 1:		Line 1:
-	'''Unreleased structure'''

-	~~The entry~~ 6kig is ~~ON HOLD until Paper Publication~~	+	==Structure of cyanobacterial photosystem I-IsiA supercomplex==
-		+	<StructureSection load='6kig' size='340' side='right'caption='[[6kig]], [[Resolution\|resolution]] 2.90Å' scene=''>
-	~~Authors~~:	+	== Structural highlights ==
-		+	<table><tr><td colspan='2'>[[6kig]] is a 51 chain structure with sequence from [http://en.wikipedia.org/wiki/Synechococcus_elongatus_(strain_pcc_7942) Synechococcus elongatus (strain pcc 7942)]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6KIG OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=6KIG FirstGlance]. <br>
-	~~Description~~:	+	</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand\|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BCR:BETA-CAROTENE'>BCR</scene>, <scene name='pdbligand=CLA:CHLOROPHYLL+A'>CLA</scene>, <scene name='pdbligand=LHG:1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE'>LHG</scene>, <scene name='pdbligand=LMG:1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE'>LMG</scene>, <scene name='pdbligand=LMU:DODECYL-ALPHA-D-MALTOSIDE'>LMU</scene>, <scene name='pdbligand=PQN:PHYLLOQUINONE'>PQN</scene>, <scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</scene>, <scene name='pdbligand=SQD:1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL'>SQD</scene></td></tr>
-	[[Category: ~~Unreleased~~ Structures]]	+	<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Photosystem_I Photosystem I], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.97.1.12 1.97.1.12] </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=6kig FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6kig OCA], [http://pdbe.org/6kig PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6kig RCSB], [http://www.ebi.ac.uk/pdbsum/6kig PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6kig ProSAT]</span></td></tr>
		+	</table>
		+	== Function ==
		+	[[http://www.uniprot.org/uniprot/PSAC_SYNE7 PSAC_SYNE7]] Apoprotein for the two 4Fe-4S centers FA and FB of photosystem I (PSI); essential for photochemical activity. FB is the terminal electron acceptor of PSI, donating electrons to ferredoxin. The C-terminus interacts with PsaA/B/D and helps assemble the protein into the PSI complex. Required for binding of PsaD and PsaE to PSI. PSI is a plastocyanin/cytochrome c6-ferredoxin oxidoreductase, converting photonic excitation into a charge separation, which transfers an electron from the donor P700 chlorophyll pair to the spectroscopically characterized acceptors A0, A1, FX, FA and FB in turn.[HAMAP-Rule:MF_01303] [[http://www.uniprot.org/uniprot/ISIA_SYNE7 ISIA_SYNE7]] Functions as an antenna for photosystem I (PSI) under iron-limiting conditions, when phycobilisomes disappear. Also functions as a dissipator of light energy, protecting cells from excessive light under iron-deficient conditions. Sequesters chlorophyll when cells are growing in iron-deficient conditions; it may bind up to 50% of the chlorophyll in iron-starved cells.<ref>PMID:10216865</ref> <ref>PMID:8022940</ref> <ref>PMID:11594057</ref> [[http://www.uniprot.org/uniprot/PSAB_SYNE7 PSAB_SYNE7]] PsaA and PsaB bind P700, the primary electron donor of photosystem I (PSI), as well as the electron acceptors A0, A1 and FX. PSI is a plastocyanin/cytochrome c6-ferredoxin oxidoreductase, converting photonic excitation into a charge separation, which transfers an electron from the donor P700 chlorophyll pair to the spectroscopically characterized acceptors A0, A1, FX, FA and FB in turn. Oxidized P700 is reduced on the lumenal side of the thylakoid membrane by plastocyanin or cytochrome c6. [[http://www.uniprot.org/uniprot/PSAJ_SYNE7 PSAJ_SYNE7]] May help in the organization of the PsaE and PsaF subunits.[HAMAP-Rule:MF_00522] [[http://www.uniprot.org/uniprot/PSAA_SYNE7 PSAA_SYNE7]] PsaA and PsaB bind P700, the primary electron donor of photosystem I (PSI), as well as the electron acceptors A0, A1 and FX. PSI is a plastocyanin/cytochrome c6-ferredoxin oxidoreductase, converting photonic excitation into a charge separation, which transfers an electron from the donor P700 chlorophyll pair to the spectroscopically characterized acceptors A0, A1, FX, FA and FB in turn. Oxidized P700 is reduced on the lumenal side of the thylakoid membrane by plastocyanin or cytochrome c6. [[http://www.uniprot.org/uniprot/PSAE_SYNE7 PSAE_SYNE7]] Stabilizes the interaction between PsaC and the PSI core, assists the docking of the ferredoxin to PSI and interacts with ferredoxin-NADP oxidoreductase.
		+	== References ==
		+	<references/>
		+	__TOC__
		+	</StructureSection>
		+	[[Category: Large Structures]]
		+	[[Category: Photosystem I]]
		+	[[Category: Cao, D F]]
		+	[[Category: Cao, P]]
		+	[[Category: Chang, W R]]
		+	[[Category: Li, M]]
		+	[[Category: Liu, Z F]]
		+	[[Category: Si, L]]
		+	[[Category: Su, X D]]
		+	[[Category: Zhang, X Z]]
		+	[[Category: Antenna]]
		+	[[Category: Chlorophyll-binding protein]]
		+	[[Category: Iron stress-induced protein some]]
		+	[[Category: Membrane protein]]
		+	[[Category: Photosynthesis]]
		+	[[Category: Photosystem]]

OCA at 07:16, 30 October 2019

OCA — Wed, 30 Oct 2019 07:16:24 GMT

←Older revision		Revision as of 07:16, 30 October 2019
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-	The entry 6kig is ON HOLD	+	The entry 6kig is ON HOLD until Paper Publication

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OCA: Protected "6kig" [edit=sysop:move=sysop]

OCA — Wed, 24 Jul 2019 04:17:28 GMT

Protected "6kig" [edit=sysop:move=sysop]

←Older revision

Revision as of 04:17, 24 July 2019

OCA: New page: '''Unreleased structure''' The entry 6kig is ON HOLD Authors: Description: Category: Unreleased Structures

OCA — Wed, 24 Jul 2019 04:17:26 GMT

New page: '''Unreleased structure''' The entry 6kig is ON HOLD Authors: Description: Category: Unreleased Structures

New page

'''Unreleased structure'''

The entry 6kig is ON HOLD

Authors:

Description:
[[Category: Unreleased Structures]]