1QCS

N-TERMINAL DOMAIN OF N-ETHYLMALEIMIDE SENSITIVE FACTOR (NSF)

• PDB DOI: https://doi.org/10.2210/pdb1QCS/pdb

• Classification: FUSION PROTEIN
• Organism(s): Cricetulus griseus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 1999-05-14 Released: 1999-05-18 
• Deposition Author(s): Yu, R.C., Jahn, R., Brunger, A.T.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.242 
• R-Value Work: 0.210 
• R-Value Observed: 0.213 

Literature

NSF N-terminal domain crystal structure: models of NSF function.

Yu, R.C., Jahn, R., Brunger, A.T.

(1999) Mol Cell 4: 97-107

• PubMed: 10445031 
• DOI: https://doi.org/10.1016/s1097-2765(00)80191-4
• Primary Citation of Related Structures:  
  1QCS


• PubMed Abstract: 
  

  N-ethylmaleimide-sensitive factor (NSF) is a hexameric ATPase essential for eukaryotic vesicle fusion. Along with SNAP proteins, it disassembles cis-SNARE complexes upon ATP hydrolysis, preparing SNAREs for trans complex formation. We have determined the crystal structure of the N-terminal domain of NSF (N) to 1.9 A resolution. N contains two subdomains which form a groove that is a likely SNAP interaction site. Unexpectedly, both N subdomains are structurally similar to domains in EF-Tu. Based on this similarity, we propose a model for a large conformational change in NSF that drives SNARE complex disassembly.

---

Organizational Affiliation: 

Howard Hughes Medical Institute, Yale University, New Haven, Connecticut 06520, USA.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 23.84 kDa 
• Atom Count: 1,662 
• Modelled Residue Count: 195 
• Deposited Residue Count: 211 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
N-ETHYLMALEIMIDE SENSITIVE FACTOR (NSF-N)	A	211	Cricetulus griseus	Mutation(s): 5  EC: 3.6.4.6
UniProt
Find proteins for P18708 (Cricetulus griseus) Explore P18708  Go to UniProtKB:  P18708

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	B [auth A], C [auth A], D [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.242 
• R-Value Work: 0.210 
• R-Value Observed: 0.213 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 32.042	α = 90
b = 175.362	β = 90
c = 79.663	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
ADSC	data collection
SCALEPACK	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1999-05-18 
Deposition Author(s): Yu, R.C., Jahn, R., Brunger, A.T.

Revision History  

• Version 1.0: 1999-05-18
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-10-09
  Changes: Data collection, Database references, Derived calculations, Structure summary