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- EMDB-15264: IF(apo/as isolated) conformation of CydDC mutant (H85A.C) in AMP-... -

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Basic information

Entry
Database: EMDB / ID: EMD-15264
TitleIF(apo/as isolated) conformation of CydDC mutant (H85A.C) in AMP-PNP(CydD) bound state (Dataset-17)
Map dataRELION local-resolution filtered map
Sample
  • Complex: CydDC heterodimer
    • Protein or peptide: CydC
    • Protein or peptide: CydD
KeywordsABC transporter / CydDC / Heme transporter / MEMBRANE PROTEIN
Function / homology
Function and homology information


cysteine export across plasma membrane / ATP-binding cassette (ABC) transporter complex, integrated substrate binding / cytochrome biosynthetic process / Translocases; Catalysing the translocation of amino acids and peptides; Linked to the hydrolysis of a nucleoside triphosphate / ABC-type heme transporter activity / heme transmembrane transport / glutathione transmembrane transport / ATPase-coupled lipid transmembrane transporter activity / ATPase-coupled transmembrane transporter activity / ATP-binding cassette (ABC) transporter complex ...cysteine export across plasma membrane / ATP-binding cassette (ABC) transporter complex, integrated substrate binding / cytochrome biosynthetic process / Translocases; Catalysing the translocation of amino acids and peptides; Linked to the hydrolysis of a nucleoside triphosphate / ABC-type heme transporter activity / heme transmembrane transport / glutathione transmembrane transport / ATPase-coupled lipid transmembrane transporter activity / ATPase-coupled transmembrane transporter activity / ATP-binding cassette (ABC) transporter complex / cell redox homeostasis / transmembrane transport / ATP hydrolysis activity / ATP binding / plasma membrane
Similarity search - Function
ABC transporter, CydDC cysteine exporter (CydDC-E) family, permease/ATP-binding protein CydC / ABC transporter, CydDC cysteine exporter (CydDC-E) family, permease/ATP-binding protein CydD / Type 1 protein exporter / ABC transporter transmembrane region / ABC transporter type 1, transmembrane domain / ABC transporter integral membrane type-1 fused domain profile. / ABC transporter type 1, transmembrane domain superfamily / ABC transporter-like, conserved site / ABC transporters family signature. / ABC transporter ...ABC transporter, CydDC cysteine exporter (CydDC-E) family, permease/ATP-binding protein CydC / ABC transporter, CydDC cysteine exporter (CydDC-E) family, permease/ATP-binding protein CydD / Type 1 protein exporter / ABC transporter transmembrane region / ABC transporter type 1, transmembrane domain / ABC transporter integral membrane type-1 fused domain profile. / ABC transporter type 1, transmembrane domain superfamily / 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. / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Glutathione/L-cysteine transport system ATP-binding/permease protein CydC / Glutathione/L-cysteine transport system ATP-binding/permease protein CydD
Similarity search - Component
Biological speciesEscherichia coli (E. coli) / Escherichia coli K-12 (bacteria)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.26 Å
AuthorsWu D / Safarian S
Funding support Germany, 1 items
OrganizationGrant numberCountry
Max Planck Society Germany
CitationJournal: Nat Chem Biol / Year: 2023
Title: Dissecting the conformational complexity and mechanism of a bacterial heme transporter.
Authors: Di Wu / Ahmad R Mehdipour / Franziska Finke / Hojjat G Goojani / Roan R Groh / Tamara N Grund / Thomas M B Reichhart / Rita Zimmermann / Sonja Welsch / Dirk Bald / Mark Shepherd / Gerhard ...Authors: Di Wu / Ahmad R Mehdipour / Franziska Finke / Hojjat G Goojani / Roan R Groh / Tamara N Grund / Thomas M B Reichhart / Rita Zimmermann / Sonja Welsch / Dirk Bald / Mark Shepherd / Gerhard Hummer / Schara Safarian /
Abstract: Iron-bound cyclic tetrapyrroles (hemes) are redox-active cofactors in bioenergetic enzymes. However, the mechanisms of heme transport and insertion into respiratory chain complexes remain unclear. ...Iron-bound cyclic tetrapyrroles (hemes) are redox-active cofactors in bioenergetic enzymes. However, the mechanisms of heme transport and insertion into respiratory chain complexes remain unclear. Here, we used cellular, biochemical, structural and computational methods to characterize the structure and function of the heterodimeric bacterial ABC transporter CydDC. We provide multi-level evidence that CydDC is a heme transporter required for functional maturation of cytochrome bd, a pharmaceutically relevant drug target. Our systematic single-particle cryogenic-electron microscopy approach combined with atomistic molecular dynamics simulations provides detailed insight into the conformational landscape of CydDC during substrate binding and occlusion. Our simulations reveal that heme binds laterally from the membrane space to the transmembrane region of CydDC, enabled by a highly asymmetrical inward-facing CydDC conformation. During the binding process, heme propionates interact with positively charged residues on the surface and later in the substrate-binding pocket of the transporter, causing the heme orientation to rotate 180°.
History
DepositionJun 27, 2022-
Header (metadata) releaseJul 5, 2023-
Map releaseJul 5, 2023-
UpdateNov 1, 2023-
Current statusNov 1, 2023Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_15264.png

Downloads & links

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Map

FileDownload / File: emd_15264.map.gz / Format: CCP4 / Size: 91.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationRELION local-resolution filtered map
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.84 Å/pix.
x 288 pix.
= 241.056 Å		0.84 Å/pix.
x 288 pix.
= 241.056 Å		0.84 Å/pix.
x 288 pix.
= 241.056 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

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Images are generated by Spider.

Voxel sizeX=Y=Z: 0.837 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.032
Minimum - Maximum-0.10188335 - 0.18987289
Average (Standard dev.)-0.0000042774723 (±0.004316193)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions288288288
Spacing288288288
CellA=B=C: 241.056 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: RELION masked 3D refinement map

Fileemd_15264_additional_1.map
AnnotationRELION masked 3D refinement map
Projections & Slices
AxesZYX

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Additional map: RELION masked postprocessing map

Fileemd_15264_additional_2.map
AnnotationRELION masked postprocessing map
Projections & Slices
AxesZYX

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Histogram

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Half map: RELION 3D refinement half map 2

Fileemd_15264_half_map_1.map
AnnotationRELION 3D refinement half map 2
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: RELION 3D refinement half map 1

Fileemd_15264_half_map_2.map
AnnotationRELION 3D refinement half map 1
Projections & Slices
AxesZYX

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Histogram

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Sample components

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Entire : CydDC heterodimer

EntireName: CydDC heterodimer
Components
  • Complex: CydDC heterodimer
    • Protein or peptide: CydC
    • Protein or peptide: CydD

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Supramolecule #1: CydDC heterodimer

SupramoleculeName: CydDC heterodimer / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Escherichia coli (E. coli) / Strain: K12
Molecular weightTheoretical: 130 KDa

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Macromolecule #1: CydC

MacromoleculeName: CydC / type: protein_or_peptide / ID: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli K-12 (bacteria)
Recombinant expressionOrganism: Escherichia coli K-12 (bacteria)
SequenceString: MRALLPYLAL YKRHKWMLSL GIVLAIVTLL ASIGLLTLSG WFLSASAVAG VAGLYSFNYM LPAAGVRGAA ITRTAGRYFE RLVSADATF RVLQHLRIYT FSKLLPLSPA GLARYRQGEL LNRVVADVDT LDHLYLRVIS PLVGAFVVIM VVTIGLSFLD F TLAFTLGG ...String:
MRALLPYLAL YKRHKWMLSL GIVLAIVTLL ASIGLLTLSG WFLSASAVAG VAGLYSFNYM LPAAGVRGAA ITRTAGRYFE RLVSADATF RVLQHLRIYT FSKLLPLSPA GLARYRQGEL LNRVVADVDT LDHLYLRVIS PLVGAFVVIM VVTIGLSFLD F TLAFTLGG IMLLTLFLMP PLFYRAGKST GQNLTHLRGQ YRQQLTAWLQ GQAELTIFGA SDRYRTQLEN TEIQWLEAQR RQ SELTALS QAIMLLIGAL AVILMLWMAS GGVGGNAQPG ALIALFVFCA LAAFEALAPV TGAFQHLGQV IASAVRISDL TDQ KPEVTF PDTQTRVADR VSLTLRDVQF TYPEQSQQAL KGISLQVNAG EHIAILGRTG CGKSTLLQQL TRAWDPQQGE ILLN DSPIA SLNEAALRQT ISVVPQRVHL FSATLRDNLL LASPGSSDEA LSEILRRVGL EKLLEDAGLN SWLGEGGRQL SGGEL RRLA IARALLHDAP LVLLDEPTEG LDATTESQIL ELLAEMMREK TVLMVTHRLR GLSRFQQIIV MDNGQIIEQG THAELL ARQ GRYYQFKQGL

UniProtKB: Glutathione/L-cysteine transport system ATP-binding/permease protein CydC

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Macromolecule #2: CydD

MacromoleculeName: CydD / type: protein_or_peptide / ID: 2 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli K-12 (bacteria)
Recombinant expressionOrganism: Escherichia coli K-12 (bacteria)
SequenceString: MNKSRQKELT RWLKQQSVIS QRWLNISRLL GFVSGILIIA QAWFMARILQ HMIMENIPRE ALLLPFTLLV LTFVLRAWVV WLRERVGYH AGQHIRFAIR RQVLDRLQQA GPAWIQGKPA GSWATLVLEQ IDDMHDYYAR YLPQMALAVS VPLLIVVAIF P SNWAAALI ...String:
MNKSRQKELT RWLKQQSVIS QRWLNISRLL GFVSGILIIA QAWFMARILQ HMIMENIPRE ALLLPFTLLV LTFVLRAWVV WLRERVGYH AGQHIRFAIR RQVLDRLQQA GPAWIQGKPA GSWATLVLEQ IDDMHDYYAR YLPQMALAVS VPLLIVVAIF P SNWAAALI LLGTAPLIPL FMALVGMGAA DANRRNFLAL ARLSGHFLDR LRGMETLRIF GRGEAEIESI RSASEDFRQR TM EVLRLAF LSSGILEFFT SLSIALVAVY FGFSYLGELD FGHYDTGVTL AAGFLALILA PEFFQPLRDL GTFYHAKAQA VGA ADSLKT FMETPLAHPQ RGEAELASTD PVTIEAEELF ITSPEGKTLA GPLNFTLPAG QRAVLVGRSG SGKSSLLNAL SGFL SYQGS LRINGIELRD LSPESWRKHL SWVGQNPQLP AATLRDNVLL ARPDASEQEL QAALDNAWVS EFLPLLPQGV DTPVG DQAA RLSVGQAQRV AVARALLNPC SLLLLDEPAA SLDAHSEQRV MEALNAASLR QTTLMVTHQL EDLADWDVIW VMQDGR IIE QGRYAELSVA GGPFATLLAH RQEEI

UniProtKB: Glutathione/L-cysteine transport system ATP-binding/permease protein CydD

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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

Concentration1.5 mg/mL
BufferpH: 6
GridModel: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 300 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 90 sec.
VitrificationCryogen name: ETHANE / Chamber humidity: 100 %

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 40.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.1 µm / Nominal defocus min: 1.1 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.26 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 204256
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: ANGULAR RECONSTITUTION
FSC plot (resolution estimation)

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