6QC3

Ovine respiratory supercomplex I+III2 open class 1


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Structures of Respiratory Supercomplex I+III2Reveal Functional and Conformational Crosstalk.

Letts, J.A.Fiedorczuk, K.Degliesposti, G.Skehel, M.Sazanov, L.A.

(2019) Mol Cell 75: 1131-1146.e6

  • DOI: 10.1016/j.molcel.2019.07.022
  • Primary Citation of Related Structures:  
    6Q9B, 6Q9E, 6Q9D, 6QA9, 6QCA, 6QCF, 6QBX, 6QC9, 6QC8, 6QC3, 6QC2, 6QC5, 6QC4, 6QC7, 6QC6

  • PubMed Abstract: 
  • The mitochondrial electron transport chain complexes are organized into supercomplexes (SCs) of defined stoichiometry, which have been proposed to regulate electron flux via substrate channeling. We demonstrate that CoQ trapping in the isolated SC I+III 2 limits complex (C)I turnover, arguing against channeling ...

    The mitochondrial electron transport chain complexes are organized into supercomplexes (SCs) of defined stoichiometry, which have been proposed to regulate electron flux via substrate channeling. We demonstrate that CoQ trapping in the isolated SC I+III 2 limits complex (C)I turnover, arguing against channeling. The SC structure, resolved at up to 3.8 Å in four distinct states, suggests that CoQ oxidation may be rate limiting because of unequal access of CoQ to the active sites of CIII 2 . CI shows a transition between "closed" and "open" conformations, accompanied by the striking rotation of a key transmembrane helix. Furthermore, the state of CI affects the conformational flexibility within CIII 2 , demonstrating crosstalk between the enzymes. CoQ was identified at only three of the four binding sites in CIII 2 , suggesting that interaction with CI disrupts CIII 2 symmetry in a functionally relevant manner. Together, these observations indicate a more nuanced functional role for the SCs.


    Organizational Affiliation

    Institute of Science and Technology Austria, Klosterneuberg 3400, Austria. Electronic address: sazanov@ist.ac.at.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
UQCRC1A [auth a1], K [auth a3]446Ovis ariesMutation(s): 0 
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Ubiquinol-cytochrome c reductase core protein 2B [auth a2], L [auth a4]439Ovis ariesMutation(s): 0 
Gene Names: UQCRC2
UniProt
Find proteins for W5Q0F9 (Ovis aries)
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome bC [auth b1], M [auth b2]379Ovis ariesMutation(s): 0 
Gene Names: MT-CYBCOBCYTBMTCYB
Membrane Entity: Yes 
UniProt
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome c1D [auth c1], N [auth c2]240Ovis ariesMutation(s): 0 
Gene Names: CYC1
Membrane Entity: Yes 
UniProt
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome b-c1 complex subunit Rieske, mitochondrialE [auth f1], O [auth f2]196Ovis ariesMutation(s): 0 
Gene Names: LOC101113001
EC: 1.10.2.2 (PDB Primary Data), 7.1.1.8 (UniProt)
Membrane Entity: Yes 
UniProt
Find proteins for W5P2X9 (Ovis aries)
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
UQCRBF [auth d1], P [auth d2]110Ovis ariesMutation(s): 0 
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
Ubiquinol-cytochrome c reductase complex III subunit VIIG [auth q1], Q [auth q2]81Ovis ariesMutation(s): 0 
Gene Names: UQCRQ
Membrane Entity: Yes 
UniProt
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome b-c1 complex subunit 6H [auth h1], R [auth h2]78Ovis ariesMutation(s): 0 
Gene Names: UQCRH
Membrane Entity: Yes 
UniProt
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Entity ID: 9
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome b-c1 complex subunit Rieske, mitochondrialI [auth x1], S [auth x2]26Ovis ariesMutation(s): 0 
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Entity ID: 10
MoleculeChainsSequence LengthOrganismDetailsImage
Ubiquinol-cytochrome c reductase, complex III subunit XJ [auth i1], T [auth i2]63Ovis ariesMutation(s): 0 
Gene Names: UQCR10
Membrane Entity: Yes 
UniProt
Find proteins for W5P6B2 (Ovis aries)
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Entity ID: 11
MoleculeChainsSequence LengthOrganismDetailsImage
NADH dehydrogenase [ubiquinone] flavoprotein 1, mitochondrialU [auth V1]445Ovis ariesMutation(s): 0 
Gene Names: NDUFV1
EC: 1.6.99.3 (PDB Primary Data), 7.1.1.2 (PDB Primary Data)
Membrane Entity: Yes 
UniProt
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Entity ID: 12
MoleculeChainsSequence LengthOrganismDetailsImage
NADH dehydrogenase [ubiquinone] flavoprotein 2, mitochondrialV [auth V2]217Ovis ariesMutation(s): 0 
Gene Names: NDUFV2
UniProt
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Entity ID: 13
MoleculeChainsSequence LengthOrganismDetailsImage
NADH:ubiquinone oxidoreductase core subunit S1W [auth S1]704Ovis ariesMutation(s): 0 
Gene Names: NDUFS1
UniProt
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Entity ID: 14
MoleculeChainsSequence LengthOrganismDetailsImage
NDUFB11X [auth S2]430Ovis ariesMutation(s): 0 
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Entity ID: 15
MoleculeChainsSequence LengthOrganismDetailsImage
NADH:ubiquinone oxidoreductase core subunit S3Y [auth S3]228Ovis ariesMutation(s): 0 
Gene Names: NDUFS3
UniProt
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Entity ID: 16
MoleculeChainsSequence LengthOrganismDetailsImage
NDUFB1Z [auth S7]179Ovis ariesMutation(s): 0 
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Entity ID: 17
MoleculeChainsSequence LengthOrganismDetailsImage
NDUFA1AA [auth S8]176Ovis ariesMutation(s): 0 
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Entity ID: 18
MoleculeChainsSequence LengthOrganismDetailsImage
NDUFV3BA [auth V3]75Ovis ariesMutation(s): 0 
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Entity ID: 19
MoleculeChainsSequence LengthOrganismDetailsImage
NDUFB6CA [auth S6]96Ovis ariesMutation(s): 0 
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Entity ID: 20
MoleculeChainsSequence LengthOrganismDetailsImage
NADH:ubiquinone oxidoreductase subunit S4DA [auth S4]133Ovis ariesMutation(s): 0 
Gene Names: NDUFS4
Membrane Entity: Yes 
UniProt
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Entity ID: 21
MoleculeChainsSequence LengthOrganismDetailsImage
NADH:ubiquinone oxidoreductase subunit A9EA [auth A9]338Ovis ariesMutation(s): 0 
Gene Names: NDUFA9
UniProt
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Entity ID: 22
MoleculeChainsSequence LengthOrganismDetailsImage
NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 2FA [auth A2]98Ovis ariesMutation(s): 0 
Gene Names: NDUFA2
Membrane Entity: Yes 
UniProt
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Entity ID: 23
MoleculeChainsSequence LengthOrganismDetailsImage
NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 5GA [auth A5]115Ovis ariesMutation(s): 0 
Gene Names: NDUFA5
Membrane Entity: Yes 
UniProt
Find proteins for W5PNX7 (Ovis aries)
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Entity ID: 24
MoleculeChainsSequence LengthOrganismDetailsImage
NADH:ubiquinone oxidoreductase subunit A6HA [auth A6]127Ovis ariesMutation(s): 0 
Gene Names: NDUFA6
Membrane Entity: Yes 
UniProt
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Entity ID: 25
MoleculeChainsSequence LengthOrganismDetailsImage
NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 7IA [auth A7]112Ovis ariesMutation(s): 0 
Gene Names: NDUFA7
Membrane Entity: Yes 
UniProt
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Entity ID: 26
MoleculeChainsSequence LengthOrganismDetailsImage
NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 12JA [auth AL]145Ovis ariesMutation(s): 0 
Membrane Entity: Yes 
UniProt
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Entity ID: 27
MoleculeChainsSequence LengthOrganismDetailsImage
Acyl carrier proteinKA [auth AA], UA [auth AB]88Ovis ariesMutation(s): 0 
Gene Names: NDUFAB1
UniProt
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Entity ID: 28
MoleculeChainsSequence LengthOrganismDetailsImage
NADH-ubiquinone oxidoreductase chain 3LA [auth D3]115Ovis ariesMutation(s): 0 
Gene Names: MT-ND3MTND3NADH3ND3
EC: 7.1.1.2
Membrane Entity: Yes 
UniProt
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Entity ID: 29
MoleculeChainsSequence LengthOrganismDetailsImage
NADH-ubiquinone oxidoreductase chain 1MA [auth D1]318Ovis ariesMutation(s): 0 
Gene Names: MT-ND1MTND1NADH1ND1
EC: 7.1.1.2
Membrane Entity: Yes 
UniProt
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Entity ID: 30
MoleculeChainsSequence LengthOrganismDetailsImage
NADH-ubiquinone oxidoreductase chain 6NA [auth D6]175Ovis ariesMutation(s): 0 
Gene Names: MT-ND6MTND6NADH6ND6
EC: 7.1.1.2
Membrane Entity: Yes 
UniProt
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Entity ID: 31
MoleculeChainsSequence LengthOrganismDetailsImage
NADH-ubiquinone oxidoreductase chain 4LOA [auth 4L]98Ovis ariesMutation(s): 0 
Gene Names: MT-ND4LMTND4LNADH4LND4L
EC: 7.1.1.2
Membrane Entity: Yes 
UniProt
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Entity ID: 32
MoleculeChainsSequence LengthOrganismDetailsImage
NADH-ubiquinone oxidoreductase chain 5PA [auth D5]606Ovis ariesMutation(s): 0 
Gene Names: MT-ND5MTND5NADH5ND5
EC: 7.1.1.2
Membrane Entity: Yes 
UniProt
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Entity ID: 33
MoleculeChainsSequence LengthOrganismDetailsImage
NADH-ubiquinone oxidoreductase chain 4QA [auth D4]459Ovis ariesMutation(s): 0 
Gene Names: MT-ND4MTND4NADH4ND4
EC: 7.1.1.2
Membrane Entity: Yes 
UniProt
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Entity ID: 34
MoleculeChainsSequence LengthOrganismDetailsImage
NADH-ubiquinone oxidoreductase chain 2RA [auth D2]347Ovis ariesMutation(s): 0 
Gene Names: MT-ND2MTND2NADH2ND2
EC: 7.1.1.2
Membrane Entity: Yes 
UniProt
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Entity ID: 35
MoleculeChainsSequence LengthOrganismDetailsImage
NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 11SA [auth AK]140Ovis ariesMutation(s): 0 
Gene Names: NDUFA11
Membrane Entity: Yes 
UniProt
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Entity ID: 36
MoleculeChainsSequence LengthOrganismDetailsImage
NADH:ubiquinone oxidoreductase subunit B5TA [auth B5]143Ovis ariesMutation(s): 0 
Gene Names: NDUFB5
Membrane Entity: Yes 
UniProt
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Entity ID: 37
MoleculeChainsSequence LengthOrganismDetailsImage
NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 8VA [auth A8]171Ovis ariesMutation(s): 0 
Gene Names: NDUFA8
Membrane Entity: Yes 
UniProt
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Entity ID: 38
MoleculeChainsSequence LengthOrganismDetailsImage
MT-ND5WA [auth BJ]175Ovis ariesMutation(s): 0 
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Entity ID: 39
MoleculeChainsSequence LengthOrganismDetailsImage
NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 10, mitochondrialXA [auth AJ]320Ovis ariesMutation(s): 0 
Gene Names: NDUFA10
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Entity ID: 40
MoleculeChainsSequence LengthOrganismDetailsImage
NADH:ubiquinone oxidoreductase subunit S5YA [auth S5]105Ovis ariesMutation(s): 0 
Gene Names: NDUFS5
Membrane Entity: Yes 
UniProt
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Entity ID: 41
MoleculeChainsSequence LengthOrganismDetailsImage
NADH:ubiquinone oxidoreductase subunit A3ZA [auth A3]83Ovis ariesMutation(s): 0 
Gene Names: NDUFA3
Membrane Entity: Yes 
UniProt
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Entity ID: 42
MoleculeChainsSequence LengthOrganismDetailsImage
NADH:ubiquinone oxidoreductase subunit B3AB [auth B3]97Ovis ariesMutation(s): 0 
Gene Names: NDUFB3
Membrane Entity: Yes 
UniProt
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Entity ID: 43
MoleculeChainsSequence LengthOrganismDetailsImage
NADH dehydrogenase [ubiquinone] 1 subunit C2BB [auth C2]120Ovis ariesMutation(s): 0 
Gene Names: NDUFC2
Membrane Entity: Yes 
UniProt
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Entity ID: 44
MoleculeChainsSequence LengthOrganismDetailsImage
NADH:ubiquinone oxidoreductase subunit B4CB [auth B4]128Ovis ariesMutation(s): 0 
Gene Names: NDUFB4
Membrane Entity: Yes 
UniProt
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Entity ID: 45
MoleculeChainsSequence LengthOrganismDetailsImage
MT-ND1DB [auth AM]143Ovis ariesMutation(s): 0 
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Entity ID: 46
MoleculeChainsSequence LengthOrganismDetailsImage
NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 6EB [auth B6]127Ovis ariesMutation(s): 0 
Gene Names: NDUFB6
Membrane Entity: Yes 
UniProt
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Entity ID: 47
MoleculeChainsSequence LengthOrganismDetailsImage
NADH:ubiquinone oxidoreductase subunit B7FB [auth B7]119Ovis ariesMutation(s): 0 
Gene Names: NDUFB7
Membrane Entity: Yes 
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Entity ID: 48
MoleculeChainsSequence LengthOrganismDetailsImage
NADH:ubiquinone oxidoreductase subunit B9GB [auth B9]178Ovis ariesMutation(s): 0 
Gene Names: NDUFB9
Membrane Entity: Yes 
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Entity ID: 49
MoleculeChainsSequence LengthOrganismDetailsImage
NADH:ubiquinone oxidoreductase subunit B2HB [auth B2]72Ovis ariesMutation(s): 0 
Gene Names: NDUFB2
Membrane Entity: Yes 
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Entity ID: 50
MoleculeChainsSequence LengthOrganismDetailsImage
NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 8, mitochondrialIB [auth B8]158Ovis ariesMutation(s): 0 
Gene Names: NDUFB8
Membrane Entity: Yes 
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Entity ID: 51
MoleculeChainsSequence LengthOrganismDetailsImage
NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 11, mitochondrialJB [auth BK]125Ovis ariesMutation(s): 0 
Gene Names: NDUFB11
Membrane Entity: Yes 
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Entity ID: 52
MoleculeChainsSequence LengthOrganismDetailsImage
NDUFB4KB [auth C1]49Ovis ariesMutation(s): 0 
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Entity ID: 53
MoleculeChainsSequence LengthOrganismDetailsImage
NDUFA13LB [auth B1]57Ovis ariesMutation(s): 0 
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Entity ID: 54
MoleculeChainsSequence LengthOrganismDetailsImage
NDUFA1MB [auth A1]70Ovis ariesMutation(s): 0 
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Small Molecules
Ligands 11 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CDL (Subject of Investigation/LOI)
Query on CDL

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KC [auth D5]CARDIOLIPIN
C81 H156 O17 P2
XVTUQDWPJJBEHJ-KZCWQMDCSA-L
 Ligand Interaction
PC1 (Subject of Investigation/LOI)
Query on PC1

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NC [auth AK]1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE
C44 H88 N O8 P
NRJAVPSFFCBXDT-HUESYALOSA-N
 Ligand Interaction
3PE (Subject of Investigation/LOI)
Query on 3PE

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JC [auth D1], LC [auth D5], MC [auth D4], QB [auth c1], VB [auth f2]1,2-Distearoyl-sn-glycerophosphoethanolamine
C41 H82 N O8 P
LVNGJLRDBYCPGB-LDLOPFEMSA-N
 Ligand Interaction
NDP (Subject of Investigation/LOI)
Query on NDP

Download Ideal Coordinates CCD File 
HC [auth A9]NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H30 N7 O17 P3
ACFIXJIJDZMPPO-NNYOXOHSSA-N
 Ligand Interaction
HEC (Subject of Investigation/LOI)
Query on HEC

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PB [auth c1], UB [auth c2]HEME C
C34 H34 Fe N4 O4
HXQIYSLZKNYNMH-LJNAALQVSA-N
 Ligand Interaction
HEM (Subject of Investigation/LOI)
Query on HEM

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NB [auth b1], OB [auth b1], SB [auth b2], TB [auth b2]PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
ZMP (Subject of Investigation/LOI)
Query on ZMP

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IC [auth AA], OC [auth AB]S-[2-({N-[(2S)-2-hydroxy-3,3-dimethyl-4-(phosphonooxy)butanoyl]-beta-alanyl}amino)ethyl] tetradecanethioate
C25 H49 N2 O8 P S
HDTINWYIVVMRIN-HSZRJFAPSA-N
 Ligand Interaction
FMN (Subject of Investigation/LOI)
Query on FMN

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YB [auth V1]FLAVIN MONONUCLEOTIDE
C17 H21 N4 O9 P
FVTCRASFADXXNN-SCRDCRAPSA-N
 Ligand Interaction
SF4
Query on SF4

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AC [auth S1], BC [auth S1], DC [auth S7], EC [auth S8], FC [auth S8], XB [auth V1]IRON/SULFUR CLUSTER
Fe4 S4
LJBDFODJNLIPKO-VKOJMFJBAC
 Ligand Interaction
FES
Query on FES

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CC [auth S1], RB [auth f1], WB [auth f2], ZB [auth V2]FE2/S2 (INORGANIC) CLUSTER
Fe2 S2
NIXDOXVAJZFRNF-UHFFFAOYSA-N
 Ligand Interaction
ZN
Query on ZN

Download Ideal Coordinates CCD File 
GC [auth S6]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
European Research CouncilAustria701309

Revision History  (Full details and data files)

  • Version 1.0: 2019-08-21
    Type: Initial release
  • Version 1.1: 2019-09-18
    Changes: Data collection, Database references
  • Version 1.2: 2019-10-02
    Changes: Data collection, Database references
  • Version 1.3: 2019-12-18
    Changes: Other
  • Version 1.4: 2021-06-02
    Changes: Derived calculations