Human steroidogenic acute regulatory protein

Experimental Data Snapshot

  • Resolution: 3.40 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.257 
  • R-Value Observed: 0.260 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Comparative structural analysis of lipid binding START domains.

Thorsell, A.G.Lee, W.H.Persson, C.Siponen, M.I.Nilsson, M.Busam, R.D.Kotenyova, T.Schuler, H.Lehtio, L.

(2011) PLoS One 6: e19521-e19521

  • DOI: https://doi.org/10.1371/journal.pone.0019521
  • Primary Citation of Related Structures:  
    2PSO, 2R55, 3FO5, 3P0L

  • PubMed Abstract: 

    Steroidogenic acute regulatory (StAR) protein related lipid transfer (START) domains are small globular modules that form a cavity where lipids and lipid hormones bind. These domains can transport ligands to facilitate lipid exchange between biological membranes, and they have been postulated to modulate the activity of other domains of the protein in response to ligand binding. More than a dozen human genes encode START domains, and several of them are implicated in a disease. We report crystal structures of the human STARD1, STARD5, STARD13 and STARD14 lipid transfer domains. These represent four of the six functional classes of START domains. Sequence alignments based on these and previously reported crystal structures define the structural determinants of human START domains, both those related to structural framework and those involved in ligand specificity. This article can also be viewed as an enhanced version in which the text of the article is integrated with interactive 3D representations and animated transitions. Please note that a web plugin is required to access this enhanced functionality. Instructions for the installation and use of the web plugin are available in Text S1.

  • Organizational Affiliation

    Department of Medical Biochemistry and Biophysics, Structural Genomics Consortium, Karolinska Institutet, Stockholm, Sweden.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Steroidogenic acute regulatory protein, mitochondrial
A, B, C, D
221Homo sapiensMutation(s): 0 
Gene Names: STARSTARD1
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P49675 (Homo sapiens)
Explore P49675 
Go to UniProtKB:  P49675
PHAROS:  P49675
GTEx:  ENSG00000147465 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP49675
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.40 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.257 
  • R-Value Observed: 0.260 
  • Space Group: P 63
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 144.13α = 90
b = 144.13β = 90
c = 101.03γ = 120
Software Package:
Software NamePurpose
MxCuBEdata collection
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report

Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2010-11-24
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2011-09-21
    Changes: Database references
  • Version 1.3: 2023-09-06
    Changes: Data collection, Database references, Refinement description