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Open data
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Basic information
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Title | Phycocyanin rod structure of cyanobacterial phycobilisome | ||||||||||||
![]() | postprocess_masked.mrc | ||||||||||||
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Function / homology | ![]() phycobilisome / plasma membrane-derived thylakoid membrane / photosynthesis Similarity search - Function | ||||||||||||
Biological species | ![]() ![]() ![]() | ||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 4.2 Å | ||||||||||||
![]() | Kawakami K / Hamaguchi T / Hirose Y / Kosumi D / Miyata M / Kamiya N / Yonekura K | ||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Core and rod structures of a thermophilic cyanobacterial light-harvesting phycobilisome. Authors: Keisuke Kawakami / Tasuku Hamaguchi / Yuu Hirose / Daisuke Kosumi / Makoto Miyata / Nobuo Kamiya / Koji Yonekura / ![]() Abstract: Cyanobacteria, glaucophytes, and rhodophytes utilize giant, light-harvesting phycobilisomes (PBSs) for capturing solar energy and conveying it to photosynthetic reaction centers. PBSs are ...Cyanobacteria, glaucophytes, and rhodophytes utilize giant, light-harvesting phycobilisomes (PBSs) for capturing solar energy and conveying it to photosynthetic reaction centers. PBSs are compositionally and structurally diverse, and exceedingly complex, all of which pose a challenge for a comprehensive understanding of their function. To date, three detailed architectures of PBSs by cryo-electron microscopy (cryo-EM) have been described: a hemiellipsoidal type, a block-type from rhodophytes, and a cyanobacterial hemidiscoidal-type. Here, we report cryo-EM structures of a pentacylindrical allophycocyanin core and phycocyanin-containing rod of a thermophilic cyanobacterial hemidiscoidal PBS. The structures define the spatial arrangement of protein subunits and chromophores, crucial for deciphering the energy transfer mechanism. They reveal how the pentacylindrical core is formed, identify key interactions between linker proteins and the bilin chromophores, and indicate pathways for unidirectional energy transfer. | ||||||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 1.6 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 14.3 KB 14.3 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 5.8 KB | Display | ![]() |
Images | ![]() | 65.4 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 381.3 KB | Display | ![]() |
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Full document | ![]() | 380.8 KB | Display | |
Data in XML | ![]() | 8.6 KB | Display | |
Data in CIF | ![]() | 10.9 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7vebMC ![]() 7veaC M: atomic model generated by this map C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Map
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Annotation | postprocess_masked.mrc | ||||||||||||||||||||
Voxel size | X=Y=Z: 1.86 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
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Sample components
-Entire : Phycocyanin rod complex of cyanobacterial phyocobilisome
Entire | Name: Phycocyanin rod complex of cyanobacterial phyocobilisome |
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Components |
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-Supramolecule #1: Phycocyanin rod complex of cyanobacterial phyocobilisome
Supramolecule | Name: Phycocyanin rod complex of cyanobacterial phyocobilisome type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#5 |
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Source (natural) | Organism: ![]() |
-Macromolecule #1: C-phycocyanin alpha subunit
Macromolecule | Name: C-phycocyanin alpha subunit / type: protein_or_peptide / ID: 1 / Number of copies: 12 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 17.456631 KDa |
Sequence | String: MKTPITEAIA AADTQGRFLS NTELQAVDGR FKRAVASMEA ARALTNNAQS LIDGAAQAVY QKFPYTTTMQ GSQYASTPEG KAKCARDIG YYLRMVTYCL VAGGTGPMDE YLIAGLSEIN STFDLSPSWY IEALKYIKAN HGLTGQAAVE ANAYIDYAIN A LS |
-Macromolecule #2: C-phycocyanin beta subunit
Macromolecule | Name: C-phycocyanin beta subunit / type: protein_or_peptide / ID: 2 / Number of copies: 12 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 18.216652 KDa |
Sequence | String: MLDAFAKVVA QADARGEFLT NAQFDALSNL VKEGNKRLDA VNRITSNAST IVANAARALF AEQPQLIQPG G(MEN)AYTN RRM AACLRDMEII LRYVTYAILA GDSSVLDDRC LNGLRETYQA LGTPGSSVAV AIQKMKDAAI AIANDPNGIT PGDCSAL MS EIAGYFDRAA AAVA |
-Macromolecule #3: Phycobilisome 8.9 kDa linker polypeptide, phycocyanin-associated, rod
Macromolecule | Name: Phycobilisome 8.9 kDa linker polypeptide, phycocyanin-associated, rod type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 8.681903 KDa |
Sequence | String: MFGQTASGSA ALSPSGARVF RYEVVGLRQN EETDRMEFPI RRSGSTFITV PYNRMNEEMQ RITRMGGKIV SITPVVAS |
-Macromolecule #4: Phycobilisome 32.1 kDa linker polypeptide, phycocyanin-associated, rod
Macromolecule | Name: Phycobilisome 32.1 kDa linker polypeptide, phycocyanin-associated, rod type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 32.158914 KDa |
Sequence | String: MAITAAASRL GTSAFSDAPP VELRANWSEE DLETVIRAVY RQVLGNDYVM ASERLVSAES LLRNGKITVR EFVRAVAKSE LYKEKFLYG NFQTRVIELN YKHLLGRAPY DESEVIFHLD LYENEGFDAD IDSYIDSPEY TNSFGDWVVP YYRGFNTQPG Q KTVGFNRI ...String: MAITAAASRL GTSAFSDAPP VELRANWSEE DLETVIRAVY RQVLGNDYVM ASERLVSAES LLRNGKITVR EFVRAVAKSE LYKEKFLYG NFQTRVIELN YKHLLGRAPY DESEVIFHLD LYENEGFDAD IDSYIDSPEY TNSFGDWVVP YYRGFNTQPG Q KTVGFNRI FRLYRGYANS DRAQAEGSMS RLARDLATNR ANTVVPPSNS DTAFAYYTPS ADVPPRACLG GSFGESGRVY RI EVAGIRQ PGYPGVRRSS TAFLVPYEQL SAKMQQLQRT GARIISVNPA |
-Macromolecule #5: Phycobilisome rod-core linker polypeptide CpcG2
Macromolecule | Name: Phycobilisome rod-core linker polypeptide CpcG2 / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 28.817357 KDa |
Sequence | String: MTIPLLSYAP SSQNQRVAGY EVPNEETPWR YSLEDAVDQS DIDELIWAAY RQVFSEHVVL KSTRQPHLES QLANRAISVR DFIRGLAKS ETFRRLVVET NSNYRLVEIA LKRLLGRAPY NKQEELAWSI RIATDGWQKF VDTLVDSDEY TQNFGDNTVP Y QRRRYKDR ...String: MTIPLLSYAP SSQNQRVAGY EVPNEETPWR YSLEDAVDQS DIDELIWAAY RQVFSEHVVL KSTRQPHLES QLANRAISVR DFIRGLAKS ETFRRLVVET NSNYRLVEIA LKRLLGRAPY NKQEELAWSI RIATDGWQKF VDTLVDSDEY TQNFGDNTVP Y QRRRYKDR PFNLVTPRYS DYWRDKLENS RYKWGDIRNF LEMARSVKVT PVQFKPVSTA NVQIPDTTRR DRPTVPASIN PT ASFPLR |
-Macromolecule #6: PHYCOCYANOBILIN
Macromolecule | Name: PHYCOCYANOBILIN / type: ligand / ID: 6 / Number of copies: 36 / Formula: CYC |
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Molecular weight | Theoretical: 588.694 Da |
Chemical component information | ![]() ChemComp-CYC: |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 6.5 |
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Vitrification | Cryogen name: NITROGEN |
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Electron microscopy
Microscope | JEOL CRYO ARM 300 |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 50.5 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | C2 aperture diameter: 150.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm |