2N7Q | pdb_00002n7q

Structure of the transmembrane domain of human nicastrin in SDS micelles

• PDB DOI: https://doi.org/10.2210/pdb2N7Q/pdb
• BMRB: 25817

• Classification: MEMBRANE PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 
• Membrane Protein: Yes  PDBTMMemProtMDmpstruc


• Deposited: 2015-09-17 Released: 2016-04-27 
• Deposition Author(s): Li, Y., Liew, L., Li, Q., Kang, C.

---

Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Structure of the transmembrane domain of human nicastrin-a component of gamma-secretase

Li, Y., Liew, L.S., Li, Q., Kang, C.

(2016) Sci Rep 6: 19522-19522

• PubMed: 26776682 
• DOI: https://doi.org/10.1038/srep19522
• Primary Citation Related Structures: 
  2N7Q, 2N7R


• PubMed Abstract: 
  

  Nicastrin is the largest component of γ-secretase that is an intramembrane protease important in the development of Alzheimer's disease. Nicastrin contains a large extracellular domain, a single transmembrane (TM) domain, and a short C-terminus. Its TM domain is important for the γ-secretase complex formation. Here we report nuclear magnetic resonance (NMR) studies of the TM and C-terminal regions of human nicastrin in both sodium dodecyl sulfate (SDS) and dodecylphosphocholine (DPC) micelles. Structural study and dynamic analysis reveal that the TM domain is largely helical and stable under both SDS and DPC micelles with its N-terminal region undergoing intermediate time scale motion. The TM helix contains a hydrophilic patch that is important for TM-TM interactions. The short C-terminus is not structured in solution and a region formed by residues V697-A702 interacts with the membrane, suggesting that these residues may play a role in the γ-secretase complex formation. Our study provides structural insight into the function of the nicastrin TM domain and the C-terminus in γ-secretase complex.

---

Organizational Affiliation: 
• Experimental Therapeutics Centre, Agency for Science, Technology and Research (A*STAR), Singapore, 138669 Singapore.
Institute of Chemical &Engineering Sciences, Agency for Science, Technology and Research (A*STAR), Singapore, 138669 Singapore.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 5.99 kDa 
• Atom Count: 350 
• Modeled Residue Count: 46 
• Deposited Residue Count: 54 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Nicastrin	A	54	Homo sapiens	Mutation(s): 0  Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for Q92542 (Homo sapiens) Explore Q92542  Go to UniProtKB:  Q92542
PHAROS:  Q92542 GTEx:  ENSG00000162736

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2016-04-27 
Deposition Author(s): Li, Y., Liew, L., Li, Q., Kang, C.

Revision History  

• Version 1.0: 2016-04-27
  Type: Initial release
  
• Version 1.1: 2024-05-01
  Changes: Data collection, Database references