Biological Assembly 1  

 3D View: Structure | Electron Density

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 15.99 kDa 
• Atom Count: 1237 
• Residue Count: 145 
• Unique protein chains: 1

1AT0

17-kDA fragment of hedgehog C-terminal autoprocessing domain

• DOI: 10.2210/pdb1AT0/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Drosophila melanogaster
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1997-08-15 Released: 1997-11-12 
• Deposition Author(s): Hall, T.M.T., Porter, J.A., Young, K.E., Koonin, E.V., Beachy, P.A., Leahy, D.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.275 
• R-Value Work: 0.218 
• R-Value Observed: 0.218 

Literature

Crystal structure of a Hedgehog autoprocessing domain: homology between Hedgehog and self-splicing proteins.

Hall, T.M., Porter, J.A., Young, K.E., Koonin, E.V., Beachy, P.A., Leahy, D.J.

(1997) Cell 91: 85-97

• PubMed: 9335337 
• DOI: 10.1016/s0092-8674(01)80011-8
• Primary Citation of Related Structures:  
  1AT0


• PubMed Abstract: 
  

The approximately 25 kDa carboxy-terminal domain of Drosophila Hedgehog protein (Hh-C) possesses an autoprocessing activity that results in an intramolecular cleavage of full-length Hedgehog protein and covalent attachment of a cholesterol moiety to the newly generated amino-terminal fragment. We have identified a 17 kDa fragment of Hh-C (Hh-C17) active in the initiation of autoprocessing and report here its crystal structure. The Hh-C17 structure comprises two homologous subdomains that appear to have arisen from tandem duplication of a primordial gene. Residues in the Hh-C17 active site have been identified, and their role in Hedgehog autoprocessing probed by site-directed mutagenesis. Aspects of sequence, structure, and reaction mechanism are conserved between Hh-C17 and the self-splicing regions of inteins, permitting reconstruction of a plausible evolutionary history of Hh-C and the inteins.

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Organizational Affiliation: 

Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
17-HEDGEHOG	A	145	Drosophila melanogaster	Mutation(s): 0  Gene Names: hh, CG4637
Find proteins for Q02936 (Drosophila melanogaster) Explore Q02936  Go to UniProtKB:  Q02936

Small Molecules

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: 0.275 
• R-Value Work: 0.218 
• R-Value Observed: 0.218 
• Space Group: I 2₁ 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 101.54	α = 90
b = 101.54	β = 90
c = 101.54	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1997-08-15 
• Released Date: 1997-11-12 
Deposition Author(s): Hall, T.M.T., Porter, J.A., Young, K.E., Koonin, E.V., Beachy, P.A., Leahy, D.J.

Revision History 

• Version 1.0: 1997-11-12
  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: 2017-09-13
  Changes: Other, Refinement description