3MSV | pdb_00003msv

The hypoxic regulator of sterol synthesis Nro1 is a nuclear import adaptor

• PDB DOI: https://doi.org/10.2210/pdb3MSV/pdb

• Classification: PROTEIN BINDING
• Organism(s): Schizosaccharomyces pombe
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2010-04-29 Released: 2011-04-20 
• Deposition Author(s): Yeh, T.L., Amzel, L.M., Bianchet, M.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.18 Å
• R-Value Free: 
  0.257 (Depositor), 0.247 (DCC) 
• R-Value Work: 
  0.205 (Depositor), 0.200 (DCC) 
• R-Value Observed: 
  0.207 (Depositor) 

Literature

The hypoxic regulator of sterol synthesis nro1 is a nuclear import adaptor.

Yeh, T.L., Lee, C.Y., Amzel, L.M., Espenshade, P.J., Bianchet, M.A.

(2011) Structure 19: 503-514

• PubMed: 21481773 
• DOI: https://doi.org/10.1016/j.str.2011.01.017
• Primary Citation Related Structures: 
  3MSV, 6E0T


• PubMed Abstract: 
  

  Fission yeast protein Sre1, the homolog of the mammalian sterol regulatory element-binding protein (SREBP), is a hypoxic transcription factor required for sterol homeostasis and low-oxygen growth. Nro1 regulates the stability of the N-terminal transcription factor domain of Sre1 (Sre1N) by inhibiting the action of the prolyl 4-hydroxylase-like Ofd1 in an oxygen-dependent manner. The crystal structure of Nro1 determined at 2.2 Å resolution shows an all-α-helical fold that can be divided into two domains: a small N-terminal domain, and a larger C-terminal HEAT-repeat domain. Follow-up studies showed that Nro1 defines a new class of nuclear import adaptor that functions both in Ofd1 nuclear localization and in the oxygen-dependent inhibition of Ofd1 to control the hypoxic response.

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Organizational Affiliation: 
• Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of Medicine, 725 N Wolfe Street, Baltimore, MD 21205, USA.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Biological Assembly 3  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 3 generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 88.97 kDa 
• Atom Count: 6,039 
• Modeled Residue Count: 700 
• Deposited Residue Count: 786 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Nuclear import adaptor, Nro1	A, B	393	Schizosaccharomyces pombe	Mutation(s): 0  Gene Names: SPCC4B3.07
UniProt
Find proteins for Q9USJ7 (Schizosaccharomyces pombe (strain 972 / ATCC 24843)) Explore Q9USJ7  Go to UniProtKB:  Q9USJ7

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.18 Å
• R-Value Free:  0.257 (Depositor), 0.247 (DCC) 
• R-Value Work:  0.205 (Depositor), 0.200 (DCC) 
• R-Value Observed: 0.207 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 47.79	α = 90
b = 107.96	β = 102.6
c = 100.78	γ = 90

Software Package:

Software Name	Purpose
StructureStudio	data collection
SOLVE	phasing
REFMAC	refinement
XDS	data reduction
SCALA	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2011-04-20 
Deposition Author(s): Yeh, T.L., Amzel, L.M., Bianchet, M.A.

Revision History  

• Version 1.0: 2011-04-20
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2024-02-21
  Changes: Data collection, Database references