1JSS | pdb_00001jss

Crystal structure of the Mus musculus cholesterol-regulated START protein 4 (StarD4).

• PDB DOI: https://doi.org/10.2210/pdb1JSS/pdb

• Classification: LIPID BINDING PROTEIN
• Organism(s): Mus musculus
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2001-08-17 Released: 2002-04-10 
• Deposition Author(s): Romanowski, M.J., Soccio, R.E., Breslow, J.L., Burley, S.K., New York SGX Research Center for Structural Genomics (NYSGXRC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 
  0.285 (Depositor), 0.284 (DCC) 
• R-Value Work: 
  0.238 (Depositor), 0.239 (DCC) 
• R-Value Observed: 
  0.238 (Depositor) 

Literature

Crystal structure of the Mus musculus cholesterol-regulated START protein 4 (StarD4) containing a StAR-related lipid transfer domain.

Romanowski, M.J., Soccio, R.E., Breslow, J.L., Burley, S.K.

(2002) Proc Natl Acad Sci U S A 99: 6949-6954

• PubMed: 12011453 
• DOI: https://doi.org/10.1073/pnas.052140699
• Primary Citation Related Structures: 
  1JSS


• PubMed Abstract: 
  

  The x-ray structure of the mouse cholesterol-regulated START protein 4 (StarD4) has been determined at 2.2-A resolution, revealing a compact alpha/beta structure related to the START domain present in the cytoplasmic C-terminal portion of human MLN64. The volume of the putative lipid-binding tunnel was estimated at 847 A(3), which is consistent with the binding of one cholesterol-size lipid molecule. Comparison of the tunnel-lining residues in StarD4 and MLN64-START permitted identification of possible lipid specificity determinants in both molecular tunnels. Homology modeling of related proteins, and comparison of the StarD4 and MLN64-START structures, showed that StarD4 is a member of a large START domain superfamily characterized by the helix-grip fold. Additional mechanistic and evolutionary studies should be facilitated by the availability of a second START domain structure from a distant relative of MLN64.

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Organizational Affiliation: 
• Laboratories of Molecular Biophysics, The Rockefeller University, 1230 York Avenue, New York, NY 10021, USA. [e-mail]

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.

Macromolecule Content 

• Total Structure Weight: 51.16 kDa 
• Atom Count: 3,498 
• Modeled Residue Count: 398 
• Deposited Residue Count: 448 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
cholesterol-regulated START protein 4	A, B	224	Mus musculus	Mutation(s): 0  Gene Names: BC005642
UniProt
Find proteins for Q99JV5 (Mus musculus) Explore Q99JV5  Go to UniProtKB:  Q99JV5

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free:  0.285 (Depositor), 0.284 (DCC) 
• R-Value Work:  0.238 (Depositor), 0.239 (DCC) 
• R-Value Observed: 0.238 (Depositor) 

Space Group: P 3₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 69.966	α = 90
b = 69.966	β = 90
c = 85.19	γ = 120

Software Package:

Software Name	Purpose
MLPHARE	phasing
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2002-04-10 
Deposition Author(s): Romanowski, M.J., Soccio, R.E., Breslow, J.L., Burley, S.K., New York SGX Research Center for Structural Genomics (NYSGXRC)

Revision History  

• Version 1.0: 2002-04-10
  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: 2021-02-03
  Changes: Database references, Structure summary
• Version 1.4: 2024-02-07
  Changes: Data collection, Database references