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- EMDB-17113: Structure of human gamma-secretase PSEN1 APH-1B isoform reconstit... -

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Basic information

Entry
Database: EMDB / ID: EMD-17113
TitleStructure of human gamma-secretase PSEN1 APH-1B isoform reconstituted into lipid nanodisc in complex with Ab46
Map dataLocal resolution filtered masked map after pixel size calibration
Sample
  • Complex: Gamma secretase
    • Protein or peptide: Nicastrin
    • Protein or peptide: Presenilin-1 CTF12
    • Protein or peptide: Gamma-secretase subunit APH-1B
    • Protein or peptide: Gamma-secretase subunit PEN-2
    • Protein or peptide: Amyloid-beta peptide 1-46
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: 1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE
Keywordsintramembrane proteolysis / protease / di-aspartyl protease / Alzheimer's disease / complex / amyloid beta / MEMBRANE PROTEIN
Function / homology
Function and homology information


Cajal-Retzius cell differentiation / positive regulation of L-glutamate import across plasma membrane / amyloid precursor protein biosynthetic process / negative regulation of core promoter binding / positive regulation of endopeptidase activity / gamma-secretase complex / short-term synaptic potentiation / aspartic endopeptidase activity, intramembrane cleaving / positive regulation of amyloid precursor protein biosynthetic process / smooth endoplasmic reticulum calcium ion homeostasis ...Cajal-Retzius cell differentiation / positive regulation of L-glutamate import across plasma membrane / amyloid precursor protein biosynthetic process / negative regulation of core promoter binding / positive regulation of endopeptidase activity / gamma-secretase complex / short-term synaptic potentiation / aspartic endopeptidase activity, intramembrane cleaving / positive regulation of amyloid precursor protein biosynthetic process / smooth endoplasmic reticulum calcium ion homeostasis / Noncanonical activation of NOTCH3 / protein catabolic process at postsynapse / TGFBR3 PTM regulation / sequestering of calcium ion / Notch receptor processing / synaptic vesicle targeting / positive regulation of coagulation / central nervous system myelination / negative regulation of axonogenesis / membrane protein intracellular domain proteolysis / skin morphogenesis / choline transport / T cell activation involved in immune response / NOTCH4 Activation and Transmission of Signal to the Nucleus / dorsal/ventral neural tube patterning / ciliary rootlet / neural retina development / regulation of resting membrane potential / L-glutamate import across plasma membrane / Regulated proteolysis of p75NTR / myeloid dendritic cell differentiation / regulation of phosphorylation / endoplasmic reticulum calcium ion homeostasis / brain morphogenesis / locomotion / amyloid precursor protein metabolic process / regulation of synaptic vesicle cycle / regulation of long-term synaptic potentiation / regulation of postsynapse organization / astrocyte activation involved in immune response / embryonic limb morphogenesis / cell fate specification / regulation of canonical Wnt signaling pathway / aggresome / myeloid cell homeostasis / growth factor receptor binding / skeletal system morphogenesis / Hydrolases; Acting on peptide bonds (peptidases); Aspartic endopeptidases / azurophil granule membrane / Golgi cisterna membrane / G protein-coupled dopamine receptor signaling pathway / glutamate receptor signaling pathway / positive regulation of amyloid fibril formation / : / blood vessel development / amyloid-beta formation / mitochondrial transport / amyloid precursor protein catabolic process / heart looping / regulation of neuron projection development / positive regulation of dendritic spine development / adult behavior / cerebral cortex cell migration / smooth endoplasmic reticulum / positive regulation of receptor recycling / nuclear outer membrane / membrane protein ectodomain proteolysis / negative regulation of apoptotic signaling pathway / negative regulation of ubiquitin-dependent protein catabolic process / EPH-ephrin mediated repulsion of cells / autophagosome assembly / endopeptidase activator activity / neuron development / somitogenesis / hematopoietic progenitor cell differentiation / T cell proliferation / regulation of synaptic transmission, glutamatergic / Nuclear signaling by ERBB4 / calcium ion homeostasis / transport vesicle / rough endoplasmic reticulum / Degradation of the extracellular matrix / Notch signaling pathway / neuron projection maintenance / astrocyte activation / NOTCH2 Activation and Transmission of Signal to the Nucleus / NRIF signals cell death from the nucleus / cellular response to calcium ion / Activated NOTCH1 Transmits Signal to the Nucleus / cerebellum development / thymus development / positive regulation of glycolytic process / dendritic shaft / epithelial cell proliferation / post-embryonic development / PDZ domain binding / NOTCH3 Activation and Transmission of Signal to the Nucleus / neuromuscular junction / apoptotic signaling pathway / cell-cell adhesion
Similarity search - Function
Peptidase A22A, presenilin 1 / Gamma-secretase subunit Aph-1 / Gamma-secretase aspartyl protease complex, presenilin enhancer-2 subunit / Aph-1 protein / Presenilin enhancer-2 subunit of gamma secretase / Peptidase A22A, presenilin / Presenilin, C-terminal / Presenilin / Nicastrin / Nicastrin, small lobe ...Peptidase A22A, presenilin 1 / Gamma-secretase subunit Aph-1 / Gamma-secretase aspartyl protease complex, presenilin enhancer-2 subunit / Aph-1 protein / Presenilin enhancer-2 subunit of gamma secretase / Peptidase A22A, presenilin / Presenilin, C-terminal / Presenilin / Nicastrin / Nicastrin, small lobe / Nicastrin large lobe / Nicastrin small lobe / Presenilin/signal peptide peptidase / Presenilin, signal peptide peptidase, family
Similarity search - Domain/homology
Presenilin-1 / Gamma-secretase subunit APH-1B / Nicastrin / Gamma-secretase subunit PEN-2
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.4 Å
AuthorsOdorcic I / Chavez Gutierrez L / Efremov RG
Funding support Belgium, 4 items
OrganizationGrant numberCountry
Research Foundation - Flanders (FWO)G0H5916N Belgium
Research Foundation - Flanders (FWO)G054617N Belgium
Research Foundation - Flanders (FWO)G0B2519N Belgium
Research Foundation - Flanders (FWO)G008023N Belgium
CitationJournal: Nat Commun / Year: 2024
Title: Apo and Aβ46-bound γ-secretase structures provide insights into amyloid-β processing by the APH-1B isoform.
Authors: Ivica Odorčić / Mohamed Belal Hamed / Sam Lismont / Lucía Chávez-Gutiérrez / Rouslan G Efremov /
Abstract: Deposition of amyloid-β (Aβ) peptides in the brain is a hallmark of Alzheimer's disease. Aβs are generated through sequential proteolysis of the amyloid precursor protein by the γ-secretase ...Deposition of amyloid-β (Aβ) peptides in the brain is a hallmark of Alzheimer's disease. Aβs are generated through sequential proteolysis of the amyloid precursor protein by the γ-secretase complexes (GSECs). Aβ peptide length, modulated by the Presenilin (PSEN) and APH-1 subunits of GSEC, is critical for Alzheimer's pathogenesis. Despite high relevance, mechanistic understanding of the proteolysis of Aβ, and its modulation by APH-1, remain incomplete. Here, we report cryo-EM structures of human GSEC (PSEN1/APH-1B) reconstituted into lipid nanodiscs in apo form and in complex with the intermediate Aβ46 substrate without cross-linking. We find that three non-conserved and structurally divergent APH-1 regions establish contacts with PSEN1, and that substrate-binding induces concerted rearrangements in one of the identified PSEN1/APH-1 interfaces, providing structural basis for APH-1 allosteric-like effects. In addition, the GSEC-Aβ46 structure reveals an interaction between Aβ46 and loop 1, and identifies three other H-bonding interactions that, according to functional validation, are required for substrate recognition and efficient sequential catalysis.
History
DepositionApr 12, 2023-
Header (metadata) releaseApr 24, 2024-
Map releaseApr 24, 2024-
UpdateNov 13, 2024-
Current statusNov 13, 2024Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_17113.png

Downloads & links

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Map

FileDownload / File: emd_17113.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationLocal resolution filtered masked map after pixel size calibration
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.95 Å/pix.
x 256 pix.
= 242.944 Å		0.95 Å/pix.
x 256 pix.
= 242.944 Å		0.95 Å/pix.
x 256 pix.
= 242.944 Å

Surface

Projections

Slices (1/3)

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Images are generated by Spider.

Voxel sizeX=Y=Z: 0.949 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.03
Minimum - Maximum-0.16402116 - 0.26177335
Average (Standard dev.)0.00014212573 (±0.006360822)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 242.944 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_17113_msk_1.map
Projections & Slices
AxesZYX

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Slices (1/2)
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Histogram (log scale)

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Additional map: Sharpened map after pixel size calibration

Fileemd_17113_additional_1.map
AnnotationSharpened map after pixel size calibration
Projections & Slices
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Histogram

Histogram (log scale)

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Half map: Half-map (1)

Fileemd_17113_half_map_1.map
AnnotationHalf-map (1)
Projections & Slices
AxesZYX

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Histogram

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Half map: Half-map (2)

Fileemd_17113_half_map_2.map
AnnotationHalf-map (2)
Projections & Slices
AxesZYX

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Histogram

Histogram (log scale)

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Sample components

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Entire : Gamma secretase

EntireName: Gamma secretase
Components
  • Complex: Gamma secretase
    • Protein or peptide: Nicastrin
    • Protein or peptide: Presenilin-1 CTF12
    • Protein or peptide: Gamma-secretase subunit APH-1B
    • Protein or peptide: Gamma-secretase subunit PEN-2
    • Protein or peptide: Amyloid-beta peptide 1-46
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: 1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE

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Supramolecule #1: Gamma secretase

SupramoleculeName: Gamma secretase / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#5
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 172 KDa

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Macromolecule #1: Nicastrin

MacromoleculeName: Nicastrin / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 79.371586 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MATAGGGSGA DPGSRGLLRL LSFCVLLAGL CRGNSVERKI YIPLNKTAPC VRLLNATHQI GCQSSISGDT GVIHVVEKEE DLQWVLTDG PNPPYMVLLE SKHFTRDLME KLKGRTSRIA GLAVSLTKPS PASGFSPSVQ CPNDGFGVYS NSYGPEFAHC R EIQWNSLG ...String:
MATAGGGSGA DPGSRGLLRL LSFCVLLAGL CRGNSVERKI YIPLNKTAPC VRLLNATHQI GCQSSISGDT GVIHVVEKEE DLQWVLTDG PNPPYMVLLE SKHFTRDLME KLKGRTSRIA GLAVSLTKPS PASGFSPSVQ CPNDGFGVYS NSYGPEFAHC R EIQWNSLG NGLAYEDFSF PIFLLEDENE TKVIKQCYQD HNLSQNGSAP TFPLCAMQLF SHMHAVISTA TCMRRSSIQS TF SINPEIV CDPLSDYNVW SMLKPINTTG TLKPDDRVVV AATRLDSRSF FWNVAPGAES AVASFVTQLA AAEALQKAPD VTT LPRNVM FVFFQGETFD YIGSSRMVYD MEKGKFPVQL ENVDSFVELG QVALRTSLEL WMHTDPVSQK NESVRNQVED LLAT LEKSG AGVPAVILRR PNQSQPLPPS SLQRFLRARN ISGVVLADHS GAFHNKYYQS IYDTAENINV SYPEWLSPEE DLNFV TDTA KALADVATVL GRALYELAGG TNFSDTVQAD PQTVTRLLYG FLIKANNSWF QSILRQDLRS YLGDGPLQHY IAVSSP TNT TYVVQYALAN LTGTVVNLTR EQCQDPSKVP SENKDLYEYS WVQGPLHSNE TDRLPRCVRS TARLARALSP AFELSQW SS TEYSTWTESR WKDIRARIFL IASKELELIT LTVGFGILIF SLIVTYCINA KADVLFIAPR EPGAVSYGTL EVLFQ

UniProtKB: Nicastrin

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Macromolecule #2: Presenilin-1 CTF12

MacromoleculeName: Presenilin-1 CTF12 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 52.669527 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MTELPAPLSY FQNAQMSEDN HLSNTVRSQN DNRERQEHND RRSLGHPEPL SNGRPQGNSR QVVEQDEEED EELTLKYGAK HVIMLFVPV TLCMVVVVAT IKSVSFYTRK DGQLIYTPFT EDTETVGQRA LHSILNAAIM ISVIVVMTIL LVVLYKYRCY K VIHAWLII ...String:
MTELPAPLSY FQNAQMSEDN HLSNTVRSQN DNRERQEHND RRSLGHPEPL SNGRPQGNSR QVVEQDEEED EELTLKYGAK HVIMLFVPV TLCMVVVVAT IKSVSFYTRK DGQLIYTPFT EDTETVGQRA LHSILNAAIM ISVIVVMTIL LVVLYKYRCY K VIHAWLII SSLLLLFFFS FIYLGEVFKT YNVAVDYITV ALLIWNFGVV GMISIHWKGP LRLQQAYLIM ISALMALVFI KY LPEWTAW LILAVISVYA LVAVLCPKGP LRMLVETAQE RNETLFPALI YSSTMVWLVN MAEGDPEAQR RVSKNSKYNA EST ERESQD TVAENDDGGF SEEWEAQRDS HLGPHRSTPE SRAAVQELSS SILAGEDPEE RGVKLGLGDF IFYSVLVGKA SATA SGDWN TTIACFVAIL IGLCLTLLLL AIFKKALPAL PISITFGLVF YFATDYLVQP FMDQLAFHQF YI

UniProtKB: Presenilin-1

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Macromolecule #3: Gamma-secretase subunit APH-1B

MacromoleculeName: Gamma-secretase subunit APH-1B / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 28.480844 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MTAAVFFGCA FIAFGPALAL YVFTIATEPL RIIFLIAGAF FWLVSLLISS LVWFMARVII DNKDGPTQKY LLIFGAFVSV YIQEMFRFA YYKLLKKASE GLKSINPGET APSMRLLAYV SGLGFGIMSG VFSFVNTLSD SLGPGTVGIH GDSPQFFLYS A FMTLVIIL ...String:
MTAAVFFGCA FIAFGPALAL YVFTIATEPL RIIFLIAGAF FWLVSLLISS LVWFMARVII DNKDGPTQKY LLIFGAFVSV YIQEMFRFA YYKLLKKASE GLKSINPGET APSMRLLAYV SGLGFGIMSG VFSFVNTLSD SLGPGTVGIH GDSPQFFLYS A FMTLVIIL LHVFWGIVFF DGCEKKKWGI LLIVLLTHLL VSAQTFISSY YGINLASAFI ILVLMGTWAF LAAGGSCRSL KL CLLCQDK NFLLYNQRSR

UniProtKB: Gamma-secretase subunit APH-1B

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Macromolecule #4: Gamma-secretase subunit PEN-2

MacromoleculeName: Gamma-secretase subunit PEN-2 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 12.038029 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString:
MNLERVSNEE KLNLCRKYYL GGFAFLPFLW LVNIFWFFRE AFLVPAYTEQ SQIKGYVWRS AVGFLFWVIV LTSWITIFQI YRPRWGALG DYLSFTIPLG TP

UniProtKB: Gamma-secretase subunit PEN-2

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Macromolecule #5: Amyloid-beta peptide 1-46

MacromoleculeName: Amyloid-beta peptide 1-46 / type: protein_or_peptide / ID: 5
Details: Since a sequence register could not be assigned, the provided sequence is a poly-alanine
Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 5.634938 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK) ...String:
(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)

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Macromolecule #7: 2-acetamido-2-deoxy-beta-D-glucopyranose

MacromoleculeName: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 7 / Number of copies: 8 / Formula: NAG
Molecular weightTheoretical: 221.208 Da
Chemical component information

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose

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Macromolecule #8: 1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE

MacromoleculeName: 1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE / type: ligand / ID: 8 / Number of copies: 14 / Formula: PC1
Molecular weightTheoretical: 790.145 Da
Chemical component information

ChemComp-PC1:
1,2-DIACYL-SN-GLYCERO-3-PHOSPHOCHOLINE / phospholipid*YM

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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

Concentration0.1 mg/mL
BufferpH: 7.4
Component:
ConcentrationFormulaName
10.0 mMC8H18N2O6S2PIPES
100.0 mMNaClsodium chloride
GridModel: C-flat-2/1 / Material: COPPER / Mesh: 300 / Support film - #0 - Film type ID: 1 / Support film - #0 - Material: CARBON / Support film - #0 - topology: HOLEY / Support film - #1 - Film type ID: 2 / Support film - #1 - Material: GRAPHENE OXIDE / Support film - #1 - topology: CONTINUOUS
VitrificationCryogen name: ETHANE / Chamber humidity: 89 % / Chamber temperature: 277 K / Instrument: GATAN CRYOPLUNGE 3

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Electron microscopy

MicroscopeJEOL CRYO ARM 300
Specialist opticsEnergy filter - Name: In-column Omega Filter / Energy filter - Slit width: 20 eV
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Digitization - Dimensions - Width: 5760 pixel / Digitization - Dimensions - Height: 4092 pixel / Number grids imaged: 1 / Number real images: 18855 / Average exposure time: 2.8 sec. / Average electron dose: 56.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 100.0 µm / Calibrated defocus max: 2.8000000000000003 µm / Calibrated defocus min: 1.2 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.55 mm / Nominal defocus max: 2.3000000000000003 µm / Nominal defocus min: 1.3 µm / Nominal magnification: 60000
Sample stageSpecimen holder model: JEOL CRYOSPECPORTER / Cooling holder cryogen: NITROGEN

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Image processing

Particle selectionNumber selected: 2788683
Startup modelType of model: OTHER / Details: ab initio model
Final reconstructionNumber classes used: 1 / Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.1) / Number images used: 53612
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.1)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 3.1)
Final 3D classificationNumber classes: 19 / Avg.num./class: 10000 / Software - Name: RELION (ver. 3.1)
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial model
PDB IDChain

6iyc

source_name: PDB, initial_model_type: experimental model
chain_id: C, source_name: Modeller, initial_model_type: in silico model
RefinementSpace: REAL / Protocol: FLEXIBLE FIT
Output model

PDB-8oqz:
Structure of human gamma-secretase PSEN1 APH-1B isoform reconstituted into lipid nanodisc in complex with Ab46

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