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Open data
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Basic information
Entry | ![]() | |||||||||
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Title | Cryo-EM Structure of human ABCA7 in PE/Ch nanodiscs | |||||||||
![]() | human ABCA7 in Brain Polar Phosphatidylethanolamine (PE)/Cholesterol (Ch) nanodiscs![]() | |||||||||
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Function / homology | ![]() plasma membrane raft organization / apolipoprotein A-I receptor activity / positive regulation of engulfment of apoptotic cell / phospholipid transporter activity / negative regulation of amyloid precursor protein biosynthetic process / ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | ![]() ![]() | |||||||||
![]() | Alam A / Le LTM / Thompson JR | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Cryo-EM structures of human ABCA7 provide insights into its phospholipid translocation mechanisms. Authors: Le Thi My Le / James Robert Thompson / Sepehr Dehghani-Ghahnaviyeh / Shashank Pant / Phuoc Xuan Dang / Jarrod Bradley French / Takahisa Kanikeyo / Emad Tajkhorshid / Amer Alam / ![]() Abstract: Phospholipid extrusion by ABC subfamily A (ABCA) exporters is central to cellular physiology, although the specifics of the underlying substrate interactions and transport mechanisms remain poorly ...Phospholipid extrusion by ABC subfamily A (ABCA) exporters is central to cellular physiology, although the specifics of the underlying substrate interactions and transport mechanisms remain poorly resolved at the molecular level. Here we report cryo-EM structures of lipid-embedded human ABCA7 in an open state and in a nucleotide-bound, closed state at resolutions between 3.6 and 4.0 Å. The former reveals an ordered patch of bilayer lipids traversing the transmembrane domain (TMD), while the latter reveals a lipid-free, closed TMD with a small extracellular opening. These structures offer a structural framework for both substrate entry and exit from the ABCA7 TMD and highlight conserved rigid-body motions that underlie the associated conformational transitions. Combined with functional analysis and molecular dynamics (MD) simulations, our data also shed light on lipid partitioning into the ABCA7 TMD and localized membrane perturbations that underlie ABCA7 function and have broader implications for other ABCA family transporters. | |||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 202.2 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 21.9 KB 21.9 KB | Display Display | ![]() |
Images | ![]() | 42.9 KB | ||
Others | ![]() ![]() ![]() | 128.5 MB 171.1 MB 171 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8ee6MC ![]() 8edwC ![]() 8eebC ![]() 8eopC 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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Related items in Molecule of the Month |
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Map
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Annotation | human ABCA7 in Brain Polar Phosphatidylethanolamine (PE)/Cholesterol (Ch) nanodiscs | ||||||||||||||||||||
Voxel size | X=Y=Z: 0.889 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Additional map: Local Resolution filtered map of human ABCA7 in...
File | emd_28047_additional_1.map | ||||||||||||
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Annotation | Local Resolution filtered map of human ABCA7 in Brain Polar Phosphatidylethanolamine (PE)/Cholesterol (Ch) nanodiscs | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: Refinement half Map 1
File | emd_28047_half_map_1.map | ||||||||||||
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Annotation | Refinement half Map 1 | ||||||||||||
Projections & Slices |
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Density Histograms |
-Half map: Refinement half Map 2
File | emd_28047_half_map_2.map | ||||||||||||
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Annotation | Refinement half Map 2 | ||||||||||||
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Density Histograms |
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Sample components
-Entire : Human ABCA7 in Porcine BPL/Ch/MSP1D1 nanodiscs
Entire | Name: Human ABCA7 in Porcine BPL/Ch/MSP1D1 nanodiscs![]() |
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Components |
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-Supramolecule #1: Human ABCA7 in Porcine BPL/Ch/MSP1D1 nanodiscs
Supramolecule | Name: Human ABCA7 in Porcine BPL/Ch/MSP1D1 nanodiscs / type: complex / ID: 1 / Chimera: Yes / Parent: 0 / Macromolecule list: #1 Details: Human ABCA7 recombinantly expressed in HEK293 TREX cell line and reconstituted in MSP1D1 nanodiscs comprising 4:1 mixture of Porcine Brain Polar Lipids:Cholesterol |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 234.35 KDa |
-Macromolecule #1: Phospholipid-transporting ATPase ABCA7
Macromolecule | Name: Phospholipid-transporting ATPase ABCA7 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO / EC number: P-type phospholipid transporter |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 234.598578 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MAFWTQLMLL LWKNFMYRRR QPVQLLVELL WPLFLFFILV AVRHSHPPLE HHECHFPNKP LPSAGTVPWL QGLICNVNNT CFPQLTPGE EPGRLSNFND SLVSRLLADA RTVLGGASAH RTLAGLGKLI ATLRAARSTA QPQPTKQSPL EPPMLDVAEL L TSLLRTES ...String: MAFWTQLMLL LWKNFMYRRR QPVQLLVELL WPLFLFFILV AVRHSHPPLE HHECHFPNKP LPSAGTVPWL QGLICNVNNT CFPQLTPGE EPGRLSNFND SLVSRLLADA RTVLGGASAH RTLAGLGKLI ATLRAARSTA QPQPTKQSPL EPPMLDVAEL L TSLLRTES LGLALGQAQE PLHSLLEAAE DLAQELLALR SLVELRALLQ RPRGTSGPLE LLSEALCSVR GPSSTVGPSL NW YEASDLM ELVGQEPESA LPDSSLSPAC SELIGALDSH PLSRLLWRRL KPLILGKLLF APDTPFTRKL MAQVNRTFEE LTL LRDVRE VWEMLGPRIF TFMNDSSNVA MLQRLLQMQD EGRRQPRPGG RDHMEALRSF LDPGSGGYSW QDAHADVGHL VGTL GRVTE CLSLDKLEAA PSEAALVSRA LQLLAEHRFW AGVVFLGPED SSDPTEHPTP DLGPGHVRIK IRMDIDVVTR TNKIR DRFW DPGPAADPLT DLRYVWGGFV YLQDLVERAA VRVLSGANPR AGLYLQQMPY PCYVDDVFLR VLSRSLPLFL TLAWIY SVT LTVKAVVREK ETRLRDTMRA MGLSRAVLWL GWFLSCLGPF LLSAALLVLV LKLGDILPYS HPGVVFLFLA AFAVATV TQ SFLLSAFFSR ANLAAACGGL AYFSLYLPYV LCVAWRDRLP AGGRVAASLL SPVAFGFGCE SLALLEEQGE GAQWHNVG T RPTADVFSLA QVSGLLLLDA ALYGLATWYL EAVCPGQYGI PEPWNFPFRR SYWCGPRPPK SPAPCPTPLD PKVLVEEAP PGLSPGVSVR SLEKRFPGSP QPALRGLSLD FYQGHITAFL GHNGAGKTTT LSILSGLFPP SGGSAFILGH DVRSSMAAIR PHLGVCPQY NVLFDMLTVD EHVWFYGRLK GLSAAVVGPE QDRLLQDVGL VSKQSVQTRH LSGGMQRKLS VAIAFVGGSQ V VILDEPTA GVDPASRRGI WELLLKYREG RTLILSTHHL DEAELLGDRV AVVAGGRLCC CGSPLFLRRH LGSGYYLTLV KA RLPLTTN EKADTDMEGS VDTRQEKKNG SQGSRVGTPQ LLALVQHWVP GARLVEELPH ELVLVLPYTG AHDGSFATLF REL DTRLAE LRLTGYGISD TSLEEIFLKV VEECAADTDM EDGSCGQHLC TGIAGLDVTL RLKMPPQETA LENGEPAGSA PETD QGSGP DAVGRVQGWA LTRQQLQALL LKRFLLARRS RRGLFAQIVL PALFVGLALV FSLIVPPFGH YPALRLSPTM YGAQV SFFS EDAPGDPGRA RLLEALLQEA GLEEPPVQHS SHRFSAPEVP AEVAKVLASG NWTPESPSPA CQCSRPGARR LLPDCP AAA GGPPPPQAVT GSGEVVQNLT GRNLSDFLVK TYPRLVRQGL KTKKWVNEVR YGGFSLGGRD PGLPSGQELG RSVEELW AL LSPLPGGALD RVLKNLTAWA HSLDAQDSLK IWFNNKGWHS MVAFVNRASN AILRAHLPPG PARHAHSITT LNHPLNLT K EQLSEGALMA SSVDVLVSIC VVFAMSFVPA SFTLVLIEER VTRAKHLQLM GGLSPTLYWL GNFLWDMCNY LVPACIVVL IFLAFQQRAY VAPANLPALL LLLLLYGWSI TPLMYPASFF FSVPSTAYVV LTCINLFIGI NGSMATFVLE LFSDQKLQEV SRILKQVFL IFPHFCLGRG LIDMVRNQAM ADAFERLGDR QFQSPLRWEV VGKNLLAMVI QGPLFLLFTL LLQHRSQLLP Q PRVRSLPL LGEEDEDVAR ERERVVQGAT QGDVLVLRNL TKVYRGQRMP AVDRLCLGIP PGECFGLLGV NGAGKTSTFR MV TGDTLAS RGEAVLAGHS VAREPSAAHL SMGYCPQSDA IFELLTGREH LELLARLRGV PEAQVAQTAG SGLARLGLSW YAD RPAGTY SGGNKRKLAT ALALVGDPAV VFLDEPTTGM DPSARRFLWN SLLAVVREGR SVMLTSHSME ECEALCSRLA IMVN GRFRC LGSPQHLKGR FAAGHTLTLR VPAARSQPAA AFVAAEFPGA ELREAHGGRL RFQLPPGGRC ALARVFGELA VHGAE HGVE DFSVSQTMLE EVFLYFSKDQ GKDEDTEEQK EAGVGVDPAP GLQHPKRVSQ FLDDPSTAET VL |
-Macromolecule #4: 2-acetamido-2-deoxy-beta-D-glucopyranose
Macromolecule | Name: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 4 / Number of copies: 5 / Formula: NAG |
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Molecular weight | Theoretical: 221.208 Da |
Chemical component information | ![]() ChemComp-NAG: |
-Macromolecule #5: UNKNOWN LIGAND
Macromolecule | Name: UNKNOWN LIGAND / type: ligand / ID: 5 / Number of copies: 20 / Formula: UNL |
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Molecular weight | Theoretical: 622.834 Da |
Chemical component information | ![]()
ChemComp-UNL: |
-Macromolecule #6: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER
Macromolecule | Name: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER / type: ligand / ID: 6 / Number of copies: 2 / Formula: AGS |
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Molecular weight | Theoretical: 523.247 Da |
Chemical component information | ![]() ChemComp-AGS: |
-Experimental details
-Structure determination
Method | ![]() |
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Aggregation state | particle |
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Sample preparation
Concentration | 0.5 mg/mL |
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Buffer | pH: 7.5 Details: 25mM HEPES pH 7.5, 150mM NaCl, 5mM ATP gammaS, 10mM Magnesium Chloride |
Grid | Model: Quantifoil R1.2/1.3 / Support film - Material: CARBON / Support film - topology: HOLEY |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 90 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD![]() |
Image recording | Film or detector model: FEI FALCON III (4k x 4k) / Detector mode: COUNTING / Average exposure time: 60.0 sec. / Average electron dose: 60.0 e/Å2 |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Startup model | Type of model: EMDB MAP EMDB ID: |
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Initial angle assignment | Type: PROJECTION MATCHING / Software - Name: RELION (ver. 3.1) |
Final 3D classification | Number classes: 1 / Software - Name: RELION (ver. 3.1/4.0) |
Final angle assignment | Type: PROJECTION MATCHING / Software - Name: RELION (ver. 3.1) |
Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 4.0 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.1/4.0) / Number images used: 50704 |