- PDB-8ce8: Cytochrome c maturation complex CcmABCDE -
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基本情報
登録情報
データベース: PDB / ID: 8ce8
タイトル
Cytochrome c maturation complex CcmABCDE
要素
Cytochrome c biogenesis ATP-binding export protein CcmA
Cytochrome c-type biogenesis protein CcmE
Heme exporter protein B
Heme exporter protein C
Heme exporter protein D
キーワード
MEMBRANE PROTEIN / Cytochrome c maturation
機能・相同性
機能・相同性情報
cytochrome c biosynthetic process / heme import across plasma membrane / ABC-type heme transporter / ABC-type heme transporter activity / heme transmembrane transporter activity / cytochrome complex assembly / ATP-binding cassette (ABC) transporter complex / heme binding / ATP hydrolysis activity / ATP binding ...cytochrome c biosynthetic process / heme import across plasma membrane / ABC-type heme transporter / ABC-type heme transporter activity / heme transmembrane transporter activity / cytochrome complex assembly / ATP-binding cassette (ABC) transporter complex / heme binding / ATP hydrolysis activity / ATP binding / metal ion binding / plasma membrane 類似検索 - 分子機能
CcmE/CycJ protein / CcmE-like superfamily / CcmE domain / Cytochrome c-type biogenesis protein CcmB / Cytochrome c-type biogenesis protein CcmC / ABC transporter, haem export, CcmA / Haem exporter protein D (CcmD) / Cytochrome c-type biogenesis protein CcmB, bacteria / : / CcmB protein ...CcmE/CycJ protein / CcmE-like superfamily / CcmE domain / Cytochrome c-type biogenesis protein CcmB / Cytochrome c-type biogenesis protein CcmC / ABC transporter, haem export, CcmA / Haem exporter protein D (CcmD) / Cytochrome c-type biogenesis protein CcmB, bacteria / : / CcmB protein / Heme exporter protein D (CcmD) / Cytochrome C biogenesis export ATP-binding protein ccmA family profile. / Cytochrome c-type biogenesis protein CcsA/CcmC / Cytochrome c assembly protein / Cytochrome C assembly protein / Nucleic acid-binding proteins / ABC transporter-like, conserved site / ABC transporters family signature. / ABC transporter / ABC transporter-like, ATP-binding domain / ATP-binding cassette, ABC transporter-type domain profile. / OB fold (Dihydrolipoamide Acetyltransferase, E2P) / Nucleic acid-binding, OB-fold / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / Beta Barrel / P-loop containing nucleoside triphosphate hydrolase / Mainly Beta 類似検索 - ドメイン・相同性
Heme exporter protein B / Heme exporter protein C / Heme exporter protein D / Cytochrome c biogenesis ATP-binding export protein CcmA / Cytochrome c-type biogenesis protein CcmE 類似検索 - 構成要素
ジャーナル: Nat Commun / 年: 2023 タイトル: Architecture of the Heme-translocating CcmABCD/E complex required for Cytochrome c maturation. 著者: Lorena Ilcu / Lukas Denkhaus / Anton Brausemann / Lin Zhang / Oliver Einsle / 要旨: Mono- and multiheme cytochromes c are post-translationally matured by the covalent attachment of heme. For this, Escherichia coli employs the most complex type of maturation machineries, the Ccm- ...Mono- and multiheme cytochromes c are post-translationally matured by the covalent attachment of heme. For this, Escherichia coli employs the most complex type of maturation machineries, the Ccm-system (for cytochrome c maturation). It consists of two membrane protein complexes, one of which shuttles heme across the membrane to a mobile chaperone that then delivers the cofactor to the second complex, an apoprotein:heme lyase, for covalent attachment. Here we report cryo-electron microscopic structures of the heme translocation complex CcmABCD from E. coli, alone and bound to the heme chaperone CcmE. CcmABCD forms a heterooctameric complex centered around the ABC transporter CcmAB that does not by itself transport heme. Our data suggest that the complex flops a heme group from the inner to the outer leaflet at its CcmBC interfaces, driven by ATP hydrolysis at CcmA. A conserved heme-handling motif (WxWD) at the periplasmic side of CcmC rotates the heme by 90° for covalent attachment to the heme chaperone CcmE that we find interacting exclusively with the CcmB subunit.
A: Cytochrome c biogenesis ATP-binding export protein CcmA B: Heme exporter protein B C: Heme exporter protein C D: Heme exporter protein D a: Cytochrome c biogenesis ATP-binding export protein CcmA b: Heme exporter protein B c: Heme exporter protein C d: Heme exporter protein D E: Cytochrome c-type biogenesis protein CcmE