Entry Database : PDB / ID : 8ab8 Structure visualization Downloads & linksTitle Complex III2, b-position, with decylubiquinone and ascorbate-reduced Components(Cytochrome b-c1 complex subunit ...) x 4 Complex III subunit 9 Cytochrome b YALI0A14806p YALI0A17468p YALI0C12210p YALI0F24673p Show more 3 items Show less DetailsKeywords MEMBRANE PROTEIN / oxidoreductase / electron transport chainFunction / homology Function and homology informationFunction Domain/homology Component
mitochondrial protein processing / mitochondrial processing peptidase / matrix side of mitochondrial inner membrane / signal peptidase activity / mitochondrial respiratory chain complex III assembly / mitochondrial processing peptidase complex / respiratory chain complex III / quinol-cytochrome-c reductase / quinol-cytochrome-c reductase activity / mitochondrial electron transport, ubiquinol to cytochrome c ... mitochondrial protein processing / mitochondrial processing peptidase / matrix side of mitochondrial inner membrane / signal peptidase activity / mitochondrial respiratory chain complex III assembly / mitochondrial processing peptidase complex / respiratory chain complex III / quinol-cytochrome-c reductase / quinol-cytochrome-c reductase activity / mitochondrial electron transport, ubiquinol to cytochrome c / mitochondrial crista / protein localization to mitochondrion / nuclear periphery / 2 iron, 2 sulfur cluster binding / metalloendopeptidase activity / mitochondrial intermembrane space / oxidoreductase activity / mitochondrial inner membrane / heme binding / mitochondrion / proteolysis / metal ion binding / membrane Similarity search - Function Cytochrome b-c1 complex subunit 10, fungi / Ubiquinol-cytochrome-c reductase complex subunit (QCR10) / Cytochrome Bc1 Complex; Chain A, domain 1 / Metalloenzyme, LuxS/M16 peptidase-like / Cytochrome b-c1 complex subunit 8 / UcrQ family / Cytochrome bc1 complex subunit Rieske, transmembrane domain superfamily / Cytochrome b-c1 complex subunit 7 / Cytochrome b-c1 complex subunit 7 superfamily / Ubiquinol-cytochrome C reductase complex 14kD subunit ... Cytochrome b-c1 complex subunit 10, fungi / Ubiquinol-cytochrome-c reductase complex subunit (QCR10) / Cytochrome Bc1 Complex; Chain A, domain 1 / Metalloenzyme, LuxS/M16 peptidase-like / Cytochrome b-c1 complex subunit 8 / UcrQ family / Cytochrome bc1 complex subunit Rieske, transmembrane domain superfamily / Cytochrome b-c1 complex subunit 7 / Cytochrome b-c1 complex subunit 7 superfamily / Ubiquinol-cytochrome C reductase complex 14kD subunit / Cytochrome b-c1 complex subunit 8 superfamily / Cytochrome b-c1 complex subunit Rieske, transmembrane domain / Ubiquinol cytochrome reductase transmembrane region / Cytochrome b-c1 complex subunit 9 / Cytochrome b-c1 complex subunit 9 superfamily / Cytochrome b-c1 complex subunit 9 / Ubiquinol-cytochrome C reductase hinge domain / Ubiquinol-cytochrome C reductase hinge domain superfamily / Ubiquinol-cytochrome C reductase hinge protein / Cytochrome c1, transmembrane anchor, C-terminal / : / Cytochrome b / Ubiquinol-cytochrome c reductase, iron-sulphur subunit / Peptidase M16, zinc-binding site / Insulinase family, zinc-binding region signature. / : / Cytochrome c1 / Cytochrome C1 family / : / Cytochrome b/b6, C-terminal / Cytochrome b(C-terminal)/b6/petD / Cytochrome b/b6 C-terminal region profile. / Cytochrome b/b6, C-terminal domain superfamily / Cytochrome b/b6/petB / Rieske iron-sulphur protein, C-terminal / Cytochrome b/b6, N-terminal / Cytochrome b/b6-like domain superfamily / Cytochrome b/b6 N-terminal region profile. / Di-haem cytochrome, transmembrane / Peptidase M16, C-terminal / Peptidase M16 inactive domain / Peptidase M16, N-terminal / Insulinase (Peptidase family M16) / Rieske iron-sulphur protein / Metalloenzyme, LuxS/M16 peptidase-like / Rieske [2Fe-2S] domain / Rieske [2Fe-2S] iron-sulphur domain / Rieske [2Fe-2S] iron-sulfur domain profile. / Rieske [2Fe-2S] iron-sulphur domain superfamily / Cytochrome c family profile. / Cytochrome c-like domain / Cytochrome c-like domain superfamily / 2-Layer Sandwich / Alpha Beta Similarity search - Domain/homology CARDIOLIPIN / Chem-DCQ / FE2/S2 (INORGANIC) CLUSTER / HEME C / PROTOPORPHYRIN IX CONTAINING FE / 1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE / PHOSPHATIDYLETHANOLAMINE / 1,2-DIMYRISTOYL-SN-GLYCERO-3-PHOSPHATE / YALI0F24673p / Cytochrome b-c1 complex subunit 2, mitochondrial ... CARDIOLIPIN / Chem-DCQ / FE2/S2 (INORGANIC) CLUSTER / HEME C / PROTOPORPHYRIN IX CONTAINING FE / 1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE / PHOSPHATIDYLETHANOLAMINE / 1,2-DIMYRISTOYL-SN-GLYCERO-3-PHOSPHATE / YALI0F24673p / Cytochrome b-c1 complex subunit 2, mitochondrial / Cytochrome b-c1 complex subunit 8 / Cytochrome b-c1 complex subunit 7 / YALI0C12210p / Complex III subunit 9 / quinol--cytochrome-c reductase / mitochondrial processing peptidase / Cytochrome b-c1 complex subunit Rieske, mitochondrial / Cytochrome b Similarity search - ComponentBiological species Yarrowia lipolytica (yeast)Method ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution : 2.6 Å DetailsAuthors Wieferig, J.P. / Kuhlbrandt, W. Funding support Germany, 1items Details Hide detailsOrganization Grant number Country Max Planck Society Germany
CitationJournal : IUCrJ / Year : 2023Title : Analysis of the conformational heterogeneity of the Rieske iron-sulfur protein in complex III by cryo-EM.Authors : Jan Philip Wieferig / Werner Kühlbrandt / Abstract : Movement of the Rieske domain of the iron-sulfur protein is essential for intramolecular electron transfer within complex III (CIII) of the respiratory chain as it bridges a gap in the cofactor chain ... Movement of the Rieske domain of the iron-sulfur protein is essential for intramolecular electron transfer within complex III (CIII) of the respiratory chain as it bridges a gap in the cofactor chain towards the electron acceptor cytochrome c. We present cryo-EM structures of CIII from Yarrowia lipolytica at resolutions up to 2.0 Å under different conditions, with different redox states of the cofactors of the high-potential chain. All possible permutations of three primary positions were observed, indicating that the two halves of the dimeric complex act independently. Addition of the substrate analogue decylubiquinone to CIII with a reduced high-potential chain increased the occupancy of the Q site. The extent of Rieske domain interactions through hydrogen bonds to the cytochrome b and cytochrome c subunits varied depending on the redox state and substrate. In the absence of quinols, the reduced Rieske domain interacted more closely with cytochrome b and cytochrome c than in the oxidized state. Upon addition of the inhibitor antimycin A, the heterogeneity of the cd-helix and ef-loop increased, which may be indicative of a long-range effect on the Rieske domain. History Deposition Jul 4, 2022 Deposition site : PDBE / Processing site : PDBERevision 1.0 Jan 11, 2023 Provider : repository / Type : Initial releaseRevision 1.0 Jan 11, 2023 Data content type : EM metadata / Data content type : EM metadata / Provider : repository / Type : Initial releaseRevision 1.1 Jan 25, 2023 Group : Database references / Structure summary / Category : audit_author / citation / citation_authorItem : _audit_author.name / _citation.journal_volume ... _audit_author.name / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation_author.identifier_ORCID Revision 1.2 Oct 16, 2024 Group : Data collection / Refinement description / Structure summaryCategory : chem_comp_atom / chem_comp_bond ... chem_comp_atom / chem_comp_bond / em_admin / pdbx_entry_details / pdbx_modification_feature / struct_ncs_dom_lim Item : _em_admin.last_update / _pdbx_entry_details.has_protein_modification ... _em_admin.last_update / _pdbx_entry_details.has_protein_modification / _struct_ncs_dom_lim.beg_auth_comp_id / _struct_ncs_dom_lim.beg_label_asym_id / _struct_ncs_dom_lim.beg_label_comp_id / _struct_ncs_dom_lim.beg_label_seq_id / _struct_ncs_dom_lim.end_auth_comp_id / _struct_ncs_dom_lim.end_label_asym_id / _struct_ncs_dom_lim.end_label_comp_id / _struct_ncs_dom_lim.end_label_seq_id Revision 2.0 Sep 2, 2026 Group : Data collection / Derived calculations ... Data collection / Derived calculations / Non-polymer description / Structure summary Category : chem_comp / chem_comp_atom ... chem_comp / chem_comp_atom / chem_comp_bond / em_admin / entity / pdbx_modification_feature / pdbx_nonpoly_atom_coordination / pdbx_nonpoly_atom_coordination_sphere / pdbx_nonpoly_atom_coordination_sphere_order / pdbx_validate_chiral Item : _chem_comp.formula / _chem_comp.formula_weight ... _chem_comp.formula / _chem_comp.formula_weight / _em_admin.last_update / _entity.formula_weight Description : Metalloprotein remediation / Provider : repository / Type : RemediationRevision 1.1 Sep 2, 2026 Data content type : EM metadata / Data content type : EM metadata / EM metadata / Group : Experimental summary / Structure summary / Data content type : EM metadata / EM metadata / Category : em_admin / entity / Data content type : EM metadata / EM metadata / Item : _em_admin.last_update / _entity.formula_weight
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