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4xk8

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Revision as of 07:03, 4 March 2020

Crystal structure of plant photosystem I-LHCI super-complex at 2.8 angstrom resolution

Structural highlights

4xk8 is a 32 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, , , , , , , , , , ,
Activity:	Photosystem I, with EC number 1.97.1.12
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[PSAC_PEA] 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-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 (By similarity).[HAMAP-Rule:MF_01303] [PSAI_PEA] May help in the organization of the PsaL subunit. [CB23_PEA] The light-harvesting complex (LHC) functions as a light receptor, it captures and delivers excitation energy to photosystems with which it is closely associated.^[1] May channel protons produced in the catalytic Mn center of water oxidation into the thylakoid lumen.^[2] [PSAJ_PHAVU] May help in the organization of the PsaE and PsaF subunits.

Publication Abstract from PubMed

Photosynthesis converts solar energy to chemical energy by means of two large pigment-protein complexes: photosystem I (PSI) and photosystem II (PSII). In higher plants, the PSI core is surrounded by a large light-harvesting complex I (LHCI) that captures sunlight and transfers the excitation energy to the core with extremely high efficiency. We report the structure of PSI-LHCI, a 600-kilodalton membrane protein supercomplex, from Pisum sativum (pea) at a resolution of 2.8 angstroms. The structure reveals the detailed arrangement of pigments and other cofactors-especially within LHCI-as well as numerous specific interactions between the PSI core and LHCI. These results provide a firm structural basis for our understanding on the energy transfer and photoprotection mechanisms within the PSI-LHCI supercomplex.

Photosynthesis. Structural basis for energy transfer pathways in the plant PSI-LHCI supercomplex.,Qin X, Suga M, Kuang T, Shen JR Science. 2015 May 29;348(6238):989-95. doi: 10.1126/science.aab0214. PMID:26023133^[3]

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

References

↑ Jahns P, Junge W. Dicyclohexylcarbodiimide-binding proteins related to the short circuit of the proton-pumping activity of photosystem II. Identified as light-harvesting chlorophyll-a/b-binding proteins. Eur J Biochem. 1990 Nov 13;193(3):731-6. PMID:2174365
↑ Jahns P, Junge W. Dicyclohexylcarbodiimide-binding proteins related to the short circuit of the proton-pumping activity of photosystem II. Identified as light-harvesting chlorophyll-a/b-binding proteins. Eur J Biochem. 1990 Nov 13;193(3):731-6. PMID:2174365
↑ Qin X, Suga M, Kuang T, Shen JR. Photosynthesis. Structural basis for energy transfer pathways in the plant PSI-LHCI supercomplex. Science. 2015 May 29;348(6238):989-95. doi: 10.1126/science.aab0214. PMID:26023133 doi:http://dx.doi.org/10.1126/science.aab0214

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/4xk8"

@@ Line 3: / Line 3: @@
 <StructureSection load='4xk8' size='340' side='right'caption='[[4xk8]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[4xk8]] is a 32 chain structure with sequence from [http://en.wikipedia.org/wiki/Arabidopsis_thaliana Arabidopsis thaliana], [http://en.wikipedia.org/wiki/Glycine_max Glycine max], [http://en.wikipedia.org/wiki/Phaseolus_vulgaris Phaseolus vulgaris], [http://en.wikipedia.org/wiki/Pisum_sativum Pisum sativum] and [http://en.wikipedia.org/wiki/Spinacia_oleracea Spinacia oleracea]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4XK8 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4XK8 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[4xk8]] is a 32 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4XK8 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4XK8 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=CHL:CHLOROPHYLL+B'>CHL</scene>, <scene name='pdbligand=CLA:CHLOROPHYLL+A'>CLA</scene>, <scene name='pdbligand=DGD:DIGALACTOSYL+DIACYL+GLYCEROL+(DGDG)'>DGD</scene>, <scene name='pdbligand=HTG:HEPTYL+1-THIOHEXOPYRANOSIDE'>HTG</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=LMT:DODECYL-BETA-D-MALTOSIDE'>LMT</scene>, <scene name='pdbligand=LUT:(3R,3R,6S)-4,5-DIDEHYDRO-5,6-DIHYDRO-BETA,BETA-CAROTENE-3,3-DIOL'>LUT</scene>, <scene name='pdbligand=PQN:PHYLLOQUINONE'>PQN</scene>, <scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</scene>, <scene name='pdbligand=XAT:(3S,5R,6S,3S,5R,6S)-5,6,5,6-DIEPOXY-5,6,5,6-+TETRAHYDRO-BETA,BETA-CAROTENE-3,3-DIOL'>XAT</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>
@@ Line 26: / Line 26: @@
 __TOC__
 </StructureSection>
-[[Category: Arabidopsis thaliana]]
-[[Category: Glycine max]]
 [[Category: Large Structures]]
-[[Category: Phaseolus vulgaris]]
 [[Category: Photosystem I]]
-[[Category: Pisum sativum]]
-[[Category: Spinacia oleracea]]
 [[Category: Kuang, T]]
 [[Category: Qin, X]]

4xk8

From Proteopedia

Revision as of 07:03, 4 March 2020

Crystal structure of plant photosystem I-LHCI super-complex at 2.8 angstrom resolution

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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