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- EMDB-0524: The structure of the photosystem I IsiA super-complex -

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Basic information

Entry
Database: EMDB / ID: EMD-0524
TitleThe structure of the photosystem I IsiA super-complex
Map dataPSI-IsiA super-complex from cyanobacteria
Sample
  • Complex: PSI-IsiA
    • Protein or peptide: x 10 types
  • Protein or peptide: x 2 types
  • Ligand: x 9 types
KeywordsPhotosystem / Antenna / Chlorophyll / Membrane / PHOTOSYNTHESIS
Function / homology
Function and homology information


plasma membrane-derived photosystem I / cellular response to iron ion starvation / photosystem I reaction center / photosystem I / photosynthetic electron transport in photosystem I / photosynthetic electron transport chain / photosystem I / chlorophyll binding / plasma membrane-derived thylakoid membrane / photosynthesis ...plasma membrane-derived photosystem I / cellular response to iron ion starvation / photosystem I reaction center / photosystem I / photosynthetic electron transport in photosystem I / photosynthetic electron transport chain / photosystem I / chlorophyll binding / plasma membrane-derived thylakoid membrane / photosynthesis / 4 iron, 4 sulfur cluster binding / electron transfer activity / magnesium ion binding / metal ion binding
Similarity search - Function
Photosystem I reaction center subunit PsaK / Photosystem I reaction centre subunit PsaK / Photosystem I PsaM, reaction centre superfamily / Photosystem I PsaM, reaction centre / Photosystem I protein M (PsaM) / Photosystem I reaction centre subunit PsaK superfamily / Photosystem I psaG and psaK proteins signature. / Photosystem I reaction center subunit V/PsaK / Photosystem I psaG / psaK / Photosystem I PsaL, reaction centre subunit XI ...Photosystem I reaction center subunit PsaK / Photosystem I reaction centre subunit PsaK / Photosystem I PsaM, reaction centre superfamily / Photosystem I PsaM, reaction centre / Photosystem I protein M (PsaM) / Photosystem I reaction centre subunit PsaK superfamily / Photosystem I psaG and psaK proteins signature. / Photosystem I reaction center subunit V/PsaK / Photosystem I psaG / psaK / Photosystem I PsaL, reaction centre subunit XI / Photosystem I, reaction centre subunit XI / Photosystem I PsaL, reaction centre subunit XI superfamily / Photosystem I reaction centre subunit XI / Photosystem I reaction centre subunit VIII / Photosystem I reaction centre subunit VIII / Photosystem I reaction centre subunit VIII superfamily / Photosystem I PsaF, reaction centre subunit III / Photosystem I PsaF, reaction centre subunit III superfamily / Photosystem I reaction centre subunit III / Photosystem I PsaJ, reaction centre subunit IX / Photosystem I PsaD / Photosystem I PsaJ, reaction centre subunit IX superfamily / Photosystem I, reaction centre subunit PsaD superfamily / Photosystem I reaction centre subunit IX / PsaJ / PsaD / Photosystem antenna protein-like / Photosystem antenna protein-like superfamily / Photosystem II protein / Photosystem I PsaE, reaction centre subunit IV / Photosystem I reaction centre subunit IV / PsaE / Photosystem I protein PsaC / Photosystem I PsaA / Photosystem I PsaB / Photosystem I PsaA/PsaB, conserved site / Photosystem I psaA and psaB proteins signature. / Photosystem I PsaA/PsaB / Photosystem I PsaA/PsaB superfamily / Photosystem I psaA/psaB protein / Electron transport accessory-like domain superfamily / 4Fe-4S dicluster domain / 4Fe-4S ferredoxin, iron-sulphur binding, conserved site / 4Fe-4S ferredoxin-type iron-sulfur binding region signature. / 4Fe-4S ferredoxin-type iron-sulfur binding domain profile. / 4Fe-4S ferredoxin-type, iron-sulphur binding domain
Similarity search - Domain/homology
Photosystem I reaction center subunit IV / Photosystem I reaction center subunit II / Photosystem I P700 chlorophyll a apoprotein A1 / Photosystem I P700 chlorophyll a apoprotein A2 / Photosystem I reaction center subunit III / Photosystem I iron-sulfur center / Photosystem I reaction center subunit XI / Photosystem I reaction center subunit PsaK 1 / Photosystem I reaction center subunit XII / Iron stress-induced chlorophyll-binding protein ...Photosystem I reaction center subunit IV / Photosystem I reaction center subunit II / Photosystem I P700 chlorophyll a apoprotein A1 / Photosystem I P700 chlorophyll a apoprotein A2 / Photosystem I reaction center subunit III / Photosystem I iron-sulfur center / Photosystem I reaction center subunit XI / Photosystem I reaction center subunit PsaK 1 / Photosystem I reaction center subunit XII / Iron stress-induced chlorophyll-binding protein / Photosystem I reaction center subunit IX / Photosystem I reaction center subunit VIII
Similarity search - Component
Biological speciesSynechocystis sp. PCC 6803 (bacteria)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.48 Å
AuthorsToporik H / Li J
CitationJournal: Nat Struct Mol Biol / Year: 2019
Title: The structure of the stress-induced photosystem I-IsiA antenna supercomplex.
Authors: Hila Toporik / Jin Li / Dewight Williams / Po-Lin Chiu / Yuval Mazor /
Abstract: Photochemical conversion in oxygenic photosynthesis takes place in two large protein-pigment complexes named photosystem II and photosystem I (PSII and PSI, respectively). Photosystems associate with ...Photochemical conversion in oxygenic photosynthesis takes place in two large protein-pigment complexes named photosystem II and photosystem I (PSII and PSI, respectively). Photosystems associate with antennae in vivo to increase the size of photosynthetic units to hundreds or thousands of pigments. Regulation of the interactions between antennae and photosystems allows photosynthetic organisms to adapt to their environment. In low-iron environments, cyanobacteria express IsiA, a PSI antenna, critical to their survival. Here we describe the structure of the PSI-IsiA complex isolated from the mesophilic cyanobacterium Synechocystis sp. PCC 6803. This 2-MDa photosystem-antenna supercomplex structure reveals more than 700 pigments coordinated by 51 subunits, as well as the mechanisms facilitating the self-assembly and association of IsiA with multiple PSI assemblies.
History
DepositionFeb 6, 2019-
Header (metadata) releaseApr 24, 2019-
Map releaseMay 29, 2019-
UpdateMar 20, 2024-
Current statusMar 20, 2024Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.0125
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.0125
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  • Surface view with fitted model
  • Atomic models: PDB-6nwa
  • Surface level: 0.0125
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_0524.png

Downloads & links

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Map

FileDownload / File: emd_0524.map.gz / Format: CCP4 / Size: 476.8 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationPSI-IsiA super-complex from cyanobacteria
Voxel sizeX=Y=Z: 1.024 Å
Density
Contour LevelBy AUTHOR: 0.0125 / Movie #1: 0.0125
Minimum - Maximum-0.049302652 - 0.15141094
Average (Standard dev.)0.00014315994 (±0.0019637637)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions500500500
Spacing500500500
CellA=B=C: 512.0 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.0241.0241.024
M x/y/z500500500
origin x/y/z0.0000.0000.000
length x/y/z512.000512.000512.000
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS500500500
D min/max/mean-0.0490.1510.000

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Supplemental data

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Sample components

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Entire : PSI-IsiA

EntireName: PSI-IsiA
Components
  • Complex: PSI-IsiA
    • Protein or peptide: Photosystem I P700 chlorophyll a apoprotein A1
    • Protein or peptide: Photosystem I P700 chlorophyll a apoprotein A2
    • Protein or peptide: Photosystem I iron-sulfur center
    • Protein or peptide: Photosystem I reaction center subunit II
    • Protein or peptide: Photosystem I reaction center subunit IV
    • Protein or peptide: Photosystem I reaction center subunit III
    • Protein or peptide: Photosystem I reaction center subunit VIII
    • Protein or peptide: Photosystem I reaction center subunit IX
    • Protein or peptide: Photosystem I reaction center subunit XI
    • Protein or peptide: Photosystem I reaction center subunit XII
  • Protein or peptide: Iron stress-induced chlorophyll-binding protein
  • Protein or peptide: Photosystem I reaction center subunit PsaK 1
  • Ligand: 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE
  • Ligand: 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE
  • Ligand: CHLOROPHYLL A ISOMER
  • Ligand: CHLOROPHYLL A
  • Ligand: PHYLLOQUINONEPhytomenadione
  • Ligand: IRON/SULFUR CLUSTERIron–sulfur cluster
  • Ligand: BETA-CAROTENEΒ-Carotene
  • Ligand: DODECYL-BETA-D-MALTOSIDE
  • Ligand: CALCIUM IONCalcium

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Supramolecule #1: PSI-IsiA

SupramoleculeName: PSI-IsiA / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#10 / Details: PSI-IsiA from cyanobacteria
Source (natural)Organism: Synechocystis sp. PCC 6803 (bacteria)
Molecular weightTheoretical: 2 MDa

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Macromolecule #1: Photosystem I P700 chlorophyll a apoprotein A1

MacromoleculeName: Photosystem I P700 chlorophyll a apoprotein A1 / type: protein_or_peptide / ID: 1 / Number of copies: 3 / Enantiomer: LEVO / EC number: photosystem I
Source (natural)Organism: Synechocystis sp. PCC 6803 (bacteria)
Molecular weightTheoretical: 83.022375 KDa
SequenceString: MTISPPEREA KAKVSVDNNP VPTSFEKWGK PGHFDRTLAR GPKTTTWIWN LHANAHDFDS QTSDLEDVSR KIFSAHFGHL AVVFVWLSG MYFHGAKFSN YEGWLADPTH IKPSAQVVWP IVGQGILNGD VGGGFHGIQI TSGLFYLWRA SGFTDSYQLY C TAIGGLVM ...String:
MTISPPEREA KAKVSVDNNP VPTSFEKWGK PGHFDRTLAR GPKTTTWIWN LHANAHDFDS QTSDLEDVSR KIFSAHFGHL AVVFVWLSG MYFHGAKFSN YEGWLADPTH IKPSAQVVWP IVGQGILNGD VGGGFHGIQI TSGLFYLWRA SGFTDSYQLY C TAIGGLVM AALMLFAGWF HYHVKAPKLE WFQNVESMMN HHLAGLLGLG SLGWAGHQIH VSMPINKLLD AGVAPKDIPL PH EFILEPS KMAELYPSFA QGLTPFFTLN WGVYSDFLTF KGGLNPVTGG LWLSDTAHHH LAIAVLFIIA GHMYRTNWGI GHS MKEILE AHKGPFTGEG HKGLYEILTT SWHAQLAINL ALLGSLTIIV AQHMYAMPPY PYQAIDYATQ LSLFTHHMWI GGFL IVGAG AHGAIFMVRD YDPAKNVNNL LDRMLRHRDA IISHLNWVCI FLGFHSFGLY IHNDTMRALG RPQDMFSDTA IQLQP IFAQ WVQHLHTLAP GATAPNALAT ASYAFGGETI AVAGKVAMMP ITLGTADFMV HHIHAFTIHV TALILLKGVL YARSSR LVP DKANLGFRFP CDGPGRGGTC QVSGWDHVFL GLFWMYNSLS VVIFHFSWKM QSDVWGTVSP DGSVTHVTLG NFAQSAI TI NGWLRDFLWA QAANVINSYG SALSAYGIMF LAGHFVFAFS LMFLFSGRGY WQELIESIVW AHNKLNVAPA IQPRALSI I QGRAVGVAHY LLGGIVTTWA FFLARSLSIG

UniProtKB: Photosystem I P700 chlorophyll a apoprotein A1

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Macromolecule #2: Photosystem I P700 chlorophyll a apoprotein A2

MacromoleculeName: Photosystem I P700 chlorophyll a apoprotein A2 / type: protein_or_peptide / ID: 2 / Number of copies: 3 / Enantiomer: LEVO / EC number: photosystem I
Source (natural)Organism: Synechocystis sp. PCC 6803 (bacteria)
Molecular weightTheoretical: 81.369531 KDa
SequenceString: MATKFPKFSQ DLAQDPTTRR IWYGIATAHD FETHDGMTEE NLYQKIFASH FGHIAIIFLW TSGTLFHVAW QGNFEQWIKD PLNIRPIAH AIWDPHFGEG AVNAFTQAGA SNPVNIAYSG VYHWFYTIGM TTNQELYSGA VFLLVLASLF LFAGWLHLQP K FRPSLAWF ...String:
MATKFPKFSQ DLAQDPTTRR IWYGIATAHD FETHDGMTEE NLYQKIFASH FGHIAIIFLW TSGTLFHVAW QGNFEQWIKD PLNIRPIAH AIWDPHFGEG AVNAFTQAGA SNPVNIAYSG VYHWFYTIGM TTNQELYSGA VFLLVLASLF LFAGWLHLQP K FRPSLAWF KNAESRLNHH LAGLFGVSSL AWAGHLVHVA IPEARGQHVG WDNFLSTPPH PAGLMPFFTG NWGVYAADPD TA GHIFGTS EGAGTAILTF LGGFHPQTES LWLTDIAHHH LAIAVIFIIA GHMYRTNWGI GHSIKEILNA HKGPLTGAGH TNL YDTINN SLHFQLGLAL ASLGVITSLV AQHMYSLPSY AFIAQDHTTQ AALYTHHQYI AGFLMVGAFA HGAIFFVRDY DPVA NKDNV LARMLEHKEA LISHLSWVSL FLGFHTLGLY VHNDVVVAFG TPEKQILIEP VFAQWIQATS GKALYGFDVL LSNPD SIAS TTGAAWLPGW LDAINSGTNS LFLTIGPGDF LVHHAIALGL HTTALILIKG ALDARGSKLM PDKKDFGYSF PCDGPG RGG TCDISAWDAF YLAMFWMLNT LGWLTFYWHW KHLGVWSGNV AQFNENSTYL MGWFRDYLWA NSAQLINGYN PYGVNNL SV WAWMFLFGHL VWATGFMFLI SWRGYWQELI ETIVWAHERT PLANLVRWKD KPVALSIVQA RLVGLAHFTV GYVLTYAA F LIASTAGKFG

UniProtKB: Photosystem I P700 chlorophyll a apoprotein A2

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Macromolecule #3: Photosystem I iron-sulfur center

MacromoleculeName: Photosystem I iron-sulfur center / type: protein_or_peptide / ID: 3 / Number of copies: 3 / Enantiomer: LEVO / EC number: photosystem I
Source (natural)Organism: Synechocystis sp. PCC 6803 (bacteria)
Molecular weightTheoretical: 8.837261 KDa
SequenceString:
MSHSVKIYDT CIGCTQCVRA CPLDVLEMVP WDGCKAAQIA SSPRTEDCVG CKRCETACPT DFLSIRVYLG AETTRSMGLA Y

UniProtKB: Photosystem I iron-sulfur center

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Macromolecule #4: Photosystem I reaction center subunit II

MacromoleculeName: Photosystem I reaction center subunit II / type: protein_or_peptide / ID: 4 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Synechocystis sp. PCC 6803 (bacteria)
Molecular weightTheoretical: 15.663749 KDa
SequenceString:
MTELSGQPPK FGGSTGGLLS KANREEKYAI TWTSASEQVF EMPTGGAAIM NEGENLLYLA RKEQCLALGT QLRTKFKPKI QDYKIYRVY PSGEVQYLHP ADGVFPEKVN EGREAQGTKT RRIGQNPEPV TIKFSGKAPY EV

UniProtKB: Photosystem I reaction center subunit II

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Macromolecule #5: Photosystem I reaction center subunit IV

MacromoleculeName: Photosystem I reaction center subunit IV / type: protein_or_peptide / ID: 5 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Synechocystis sp. PCC 6803 (bacteria)
Molecular weightTheoretical: 8.154086 KDa
SequenceString:
MALNRGDKVR IKRTESYWYG DVGTVASVEK SGILYPVIVR FDRVNYNGFS GSASGVNTNN FAENELELVQ AAAK

UniProtKB: Photosystem I reaction center subunit IV

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Macromolecule #6: Photosystem I reaction center subunit III

MacromoleculeName: Photosystem I reaction center subunit III / type: protein_or_peptide / ID: 6 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Synechocystis sp. PCC 6803 (bacteria)
Molecular weightTheoretical: 18.267082 KDa
SequenceString:
MKHLLALLLA FTLWFNFAPS ASADDFANLT PCSENPAYLA KSKNFLNTTN DPNSGKIRAE RYASALCGPE GYPHLIVDGR FTHAGDFLI PSILFLYIAG WIGWVGRSYL IEIRESKNPE MQEVVINVPL AIKKMLGGFL WPLAAVGEYT SGKLVMKDSE I PTSPR

UniProtKB: Photosystem I reaction center subunit III

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Macromolecule #7: Photosystem I reaction center subunit VIII

MacromoleculeName: Photosystem I reaction center subunit VIII / type: protein_or_peptide / ID: 7 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Synechocystis sp. PCC 6803 (bacteria)
Molecular weightTheoretical: 4.414148 KDa
SequenceString:
MDGSYAASYL PWILIPMVGW LFPAVTMGLL FIHIESEGEG

UniProtKB: Photosystem I reaction center subunit VIII

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Macromolecule #8: Photosystem I reaction center subunit IX

MacromoleculeName: Photosystem I reaction center subunit IX / type: protein_or_peptide / ID: 8 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Synechocystis sp. PCC 6803 (bacteria)
Molecular weightTheoretical: 4.535415 KDa
SequenceString:
MDGLKSFLST APVMIMALLT FTAGILIEFN RFYPDLLFHP

UniProtKB: Photosystem I reaction center subunit IX

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Macromolecule #9: Photosystem I reaction center subunit XI

MacromoleculeName: Photosystem I reaction center subunit XI / type: protein_or_peptide / ID: 9 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Synechocystis sp. PCC 6803 (bacteria)
Molecular weightTheoretical: 16.631795 KDa
SequenceString:
MAESNQVVQA YNGDPFVGHL STPISDSAFT RTFIGNLPAY RKGLSPILRG LEVGMAHGYF LIGPWTLLGP LRDSEYQYIG GLIGALALI LVATAALSSY GLVTFQGEQG SGDTLQTADG WSQFAAGFFV GGMGGAFVAY FLLENLSVVD GIFRGLFN

UniProtKB: Photosystem I reaction center subunit XI

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Macromolecule #10: Photosystem I reaction center subunit XII

MacromoleculeName: Photosystem I reaction center subunit XII / type: protein_or_peptide / ID: 10 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Synechocystis sp. PCC 6803 (bacteria)
Molecular weightTheoretical: 3.382063 KDa
SequenceString:
MALSDTQILA ALVVALLPAF LAFRLSTELY K

UniProtKB: Photosystem I reaction center subunit XII

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Macromolecule #11: Iron stress-induced chlorophyll-binding protein

MacromoleculeName: Iron stress-induced chlorophyll-binding protein / type: protein_or_peptide / ID: 11 / Number of copies: 18 / Enantiomer: LEVO
Source (natural)Organism: Synechocystis sp. PCC 6803 (bacteria)
Molecular weightTheoretical: 37.250734 KDa
SequenceString: MQTYGNDTVQ YEWWAGNARF ADQSGLFIAA HVAQAALTAF WAGAFTLFEI SRFDPTQAMG DQGLILLPHL ATLGWGVGDG GQIVDTYPY FVIGSIHLIA SAVLGAGALF HTLRAPADLS TLKGQGKKFH FTWENPQQLG IILGHHLLFL GAGALLLAGK A MYWGGLYD ...String:
MQTYGNDTVQ YEWWAGNARF ADQSGLFIAA HVAQAALTAF WAGAFTLFEI SRFDPTQAMG DQGLILLPHL ATLGWGVGDG GQIVDTYPY FVIGSIHLIA SAVLGAGALF HTLRAPADLS TLKGQGKKFH FTWENPQQLG IILGHHLLFL GAGALLLAGK A MYWGGLYD ATTQTVRLVS QPTLDPLVIY GYQTHFASIS SLEDLVGGHI FVGFLLIGGG IWHILVPPLG WAKKVLLFSG EA ILSYSLG GIALAGFVAA YFCAVNTLAY PPEFYGPPLA IKLGIFPYFA DTVELPMHAH TSRAWLANAH FFLAFFFLQG HLW HALRAL GFDFKRVEQA FDSLQT

UniProtKB: Iron stress-induced chlorophyll-binding protein

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Macromolecule #12: Photosystem I reaction center subunit PsaK 1

MacromoleculeName: Photosystem I reaction center subunit PsaK 1 / type: protein_or_peptide / ID: 12 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Synechocystis sp. PCC 6803 (bacteria)
Molecular weightTheoretical: 8.649268 KDa
SequenceString:
MHSFLLATAV PATLSWSPKV AGVMIACNIL AIAFGKLTIK QQNVGTPMPS SNFFGGFGLG AVLGTASFGH ILGAGVILGL ANMGVL

UniProtKB: Photosystem I reaction center subunit PsaK 1

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Macromolecule #13: 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE

MacromoleculeName: 1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE / type: ligand / ID: 13 / Number of copies: 9 / Formula: LHG
Molecular weightTheoretical: 722.97 Da
Chemical component information

ChemComp-LHG:
1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE / phospholipid*YM / Phosphatidylglycerol

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Macromolecule #14: 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE

MacromoleculeName: 1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE / type: ligand / ID: 14 / Number of copies: 15 / Formula: LMG
Molecular weightTheoretical: 787.158 Da
Chemical component information

ChemComp-LMG:
1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE

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Macromolecule #15: CHLOROPHYLL A ISOMER

MacromoleculeName: CHLOROPHYLL A ISOMER / type: ligand / ID: 15 / Number of copies: 3 / Formula: CL0
Molecular weightTheoretical: 893.489 Da
Chemical component information

ChemComp-CL0:
CHLOROPHYLL A ISOMER / Chlorophyll a

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Macromolecule #16: CHLOROPHYLL A

MacromoleculeName: CHLOROPHYLL A / type: ligand / ID: 16 / Number of copies: 588 / Formula: CLA
Molecular weightTheoretical: 893.489 Da
Chemical component information

ChemComp-CLA:
CHLOROPHYLL A / Chlorophyll a

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Macromolecule #17: PHYLLOQUINONE

MacromoleculeName: PHYLLOQUINONE / type: ligand / ID: 17 / Number of copies: 6 / Formula: PQN
Molecular weightTheoretical: 450.696 Da
Chemical component information

ChemComp-PQN:
PHYLLOQUINONE / Phytomenadione

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Macromolecule #18: IRON/SULFUR CLUSTER

MacromoleculeName: IRON/SULFUR CLUSTER / type: ligand / ID: 18 / Number of copies: 9 / Formula: SF4
Molecular weightTheoretical: 351.64 Da
Chemical component information

ChemComp-FS1:
IRON/SULFUR CLUSTER / Iron–sulfur cluster

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Macromolecule #19: BETA-CAROTENE

MacromoleculeName: BETA-CAROTENE / type: ligand / ID: 19 / Number of copies: 135 / Formula: BCR
Molecular weightTheoretical: 536.873 Da
Chemical component information

ChemComp-BCR:
BETA-CAROTENE / Β-Carotene

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Macromolecule #20: DODECYL-BETA-D-MALTOSIDE

MacromoleculeName: DODECYL-BETA-D-MALTOSIDE / type: ligand / ID: 20 / Number of copies: 3 / Formula: LMT
Molecular weightTheoretical: 510.615 Da
Chemical component information

ChemComp-LMT:
DODECYL-BETA-D-MALTOSIDE / detergent*YM

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Macromolecule #21: CALCIUM ION

MacromoleculeName: CALCIUM ION / type: ligand / ID: 21 / Number of copies: 3 / Formula: CA
Molecular weightTheoretical: 40.078 Da

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 8
VitrificationCryogen name: ETHANE / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 1.6 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 572000
Startup modelType of model: NONE
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3)
Final 3D classificationSoftware - Name: RELION
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3)
Final reconstructionNumber classes used: 95 / Applied symmetry - Point group: C3 (3 fold cyclic) / Algorithm: BACK PROJECTION / Resolution.type: BY AUTHOR / Resolution: 3.48 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION / Software - details: 3 / Number images used: 74000
FSC plot (resolution estimation)

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Atomic model buiding 1

RefinementSpace: REAL / Protocol: OTHER / Overall B value: 16.43
Output model

PDB-6nwa:
The structure of the photosystem I IsiA super-complex

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Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi

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