2HSD

THE REFINED THREE-DIMENSIONAL STRUCTURE OF 3ALPHA,20BETA-HYDROXYSTEROID DEHYDROGENASE AND POSSIBLE ROLES OF THE RESIDUES CONSERVED IN SHORT-CHAIN DEHYDROGENASES

• PDB DOI:  https://doi.org/10.2210/pdb2HSD/pdb
• Entry: 2HSD supersedes: 1HSD

• Classification: OXIDOREDUCTASE
• Organism(s): Streptomyces exfoliatus
• Mutation(s): No 


• Deposited: 1994-03-28 Released: 1994-08-31 
• Deposition Author(s): Ghosh, D., Duax, W.L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.64 Å
• R-Value Observed: 0.188 

Literature

The refined three-dimensional structure of 3 alpha,20 beta-hydroxysteroid dehydrogenase and possible roles of the residues conserved in short-chain dehydrogenases.

Ghosh, D., Wawrzak, Z., Weeks, C.M., Duax, W.L., Erman, M.

(1994) Structure 2: 629-640

• PubMed: 7922040 
• DOI: https://doi.org/10.1016/s0969-2126(00)00064-2
• Primary Citation of Related Structures:  
  2HSD


• PubMed Abstract: 
  

Bacterial 3 alpha,20 beta-hydroxysteroid dehydrogenase reversibly oxidizes the 3 alpha and 20 beta hydroxyl groups of steroids derived from androstanes and pregnanes. It was the first short-chain dehydrogenase to be studied by X-ray crystallography. The previous description of the structure of this enzyme, at 2.6 A resolution, did not permit unambiguous assignment of several important groups. We have further refined the structure of the complex of the enzyme with its cofactor, nicotinamide adenine dinucleotide (NAD), and solvent molecules, at the same resolution.

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Related Citations: 

• Three-Dimensional Structure of Holo 3Alpha,20Beta-Hydroxysteroid Dehydrogenase: A Member of a Short-Chain Dehydrogenase Family
  Ghosh, D., Weeks, C.M., Grochulski, P., Duax, W.L., Erman, M., Rimsay, R.L., Orr, J.C.
  (1991) Proc Natl Acad Sci U S A 88: 10064

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Organizational Affiliation: 

Medical Foundation of Buffalo, Inc., NY 14203.

Biological Assembly 1  

Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 107.76 kDa 
• Atom Count: 7,544 
• Modelled Residue Count: 1,012 
• Deposited Residue Count: 1,012 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
3-ALPHA, 20 BETA-HYDROXYSTEROID DEHYDROGENASE	A, B, C, D	253	Streptomyces exfoliatus	Mutation(s): 0  EC: 1.1.1.53
UniProt
Find proteins for P19992 (Streptomyces exfoliatus) Explore P19992  Go to UniProtKB:  P19992

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAD	E [auth A], F [auth B], G [auth C], H [auth D]	NICOTINAMIDE-ADENINE-DINUCLEOTIDE C21 H27 N7 O14 P2 BAWFJGJZGIEFAR-NNYOXOHSSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.64 Å
• R-Value Observed: 0.188 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 106.2	α = 90
b = 106.2	β = 90
c = 203.8	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
PROLSQ	refinement
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1994-08-31 
Deposition Author(s): Ghosh, D., Duax, W.L.
• This entry supersedes: 1HSD

Revision History  

• Version 1.0: 1994-08-31
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-11-29
  Changes: Derived calculations, Other