Biological Assembly 1  

 3D View: Structure

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 5-mer - ABCDE 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 127307.88 
• Atom Count: 8518 
• Residue Count: 1249 
• Unique protein chains: 5

4UIS

The cryoEM structure of human gamma-Secretase complex

• DOI: 10.2210/pdb4UIS/pdb
• EMDataBank: EMD-2974

• Classification: HYDROLASE
• Organism(s): Homo sapiens, Enterobacteria phage T4
• Expression System: Homo sapiens


• Deposited: 2015-04-03 Released: 2015-06-10 
• Deposition Author(s): Sun, L., Zhao, L., Yang, G., Yan, C., Zhou, R., Zhou, X., Xie, T., Zhao, Y., Wu, S., Li, X., Shi, Y.

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 4.4 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Structural Basis of Human Gamma-Secretase Assembly.

Sun, L., Zhao, L., Yang, G., Yan, C., Zhou, R., Zhou, X., Xie, T., Zhao, Y., Wu, S., Li, X., Shi, Y.

(2015) Proc.Natl.Acad.Sci.USA 112: 6003

• PubMed: 25918421 
• DOI: 10.1073/pnas.1506242112


• PubMed Abstract: 
  

The four-component intramembrane protease γ-secretase is intricately linked to the development of Alzheimer's disease. Despite recent structural advances, the transmembrane segments (TMs) of γ-secretase remain to be specifically assigned. Here we report a 3D structure of human γ-secretase at 4.32-Å resolution, determined by single-particle, electron cryomicroscopy in the presence of digitonin and with a T4 lysozyme fused to the amino terminus of presenilin 1 (PS1). The overall structure of this human γ-secretase is very similar to that of wild-type γ-secretase determined in the presence of amphipols. The 20 TMs are unambiguously assigned to the four components, revealing principles of subunit assembly. Within the transmembrane region, PS1 is centrally located, with its amino-terminal fragment (NTF) packing against Pen-2 and its carboxyl-terminal fragment (CTF) interacting with Aph-1. The only TM of nicastrin associates with Aph-1 at the thick end of the TM horseshoe, and the extracellular domain of nicastrin directly binds Pen-2 at the thin end. TM6 and TM7 in PS1, which harbor the catalytic aspartate residues, are located on the convex side of the TM horseshoe. This structure serves as an important framework for understanding the function and mechanism of γ-secretase.

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Organizational Affiliation: 

Ministry of Education Key Laboratory of Protein Science, Tsinghua-Peking Joint Center for Life Sciences, Center for Structural Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
GAMMA-SECRETASE	A	588	Homo sapiens	Gene Names: NCSTN (KIAA0253)
Membrane protein mpstruct	Group:  TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group:  Intramembrane Proteases	Protein:  γ-secretase
Find proteins for Q92542 (Homo sapiens) Go to Gene View: NCSTN Go to UniProtKB:  Q92542

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
GAMMA-SECRETASE	B	241	Homo sapiens	Gene Names: PSEN1 (AD3, PS1, PSNL1) EC: 3.4.23.-
Membrane protein mpstruct	Group:  TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group:  Intramembrane Proteases	Protein:  γ-secretase
Find proteins for P49768 (Homo sapiens) Go to Gene View: PSEN1 Go to UniProtKB:  P49768

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details
GAMMA-SECRETASE	C	196	N/A
Protein Feature View is not available: No corresponding UniProt sequence found.

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details
GAMMA-SECRETASE	D	62	N/A
Protein Feature View is not available: No corresponding UniProt sequence found.

Entity ID: 5
Molecule	Chains	Sequence Length	Organism	Details
LYSOZYME	G	162	Enterobacteria phage T4	Gene Names: e EC: 3.2.1.17
Membrane protein mpstruct	Group:  TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group:  Intramembrane Proteases	Protein:  γ-secretase
Find proteins for D9IEF7 (Enterobacteria phage T4) Go to UniProtKB:  D9IEF7

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
UNK	A, B, C, D	L-PEPTIDE LINKING	C4 H9 N O2		--

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 4.4 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2015-04-03 
• Released Date: 2015-06-10 
• Deposition Author(s): Sun, L., Zhao, L., Yang, G., Yan, C., Zhou, R., Zhou, X., Xie, T., Zhao, Y., Wu, S., Li, X., Shi, Y.

Revision History 

• Version 1.0: 2015-06-10
  Type: Initial release
• Version 1.1: 2017-08-02
  Type: Data collection