Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

 3D View: Structure | Ligand Interaction

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

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 172.44 kDa 
• Atom Count: 12269 
• Residue Count: 1519 
• Unique protein chains: 3

1OVA

CRYSTAL STRUCTURE OF UNCLEAVED OVALBUMIN AT 1.95 ANGSTROMS RESOLUTION

• DOI: 10.2210/pdb1OVA/pdb

• Classification: SERPIN
• Organism(s): Gallus gallus
• Mutation(s): No 


• Deposited: 1990-11-26 Released: 1992-04-15 
• Deposition Author(s): Stein, P.E., Leslie, A.G.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Observed: 0.169 

Literature

Crystal structure of uncleaved ovalbumin at 1.95 A resolution.

Stein, P.E., Leslie, A.G., Finch, J.T., Carrell, R.W.

(1991) J Mol Biol 221: 941-959

• PubMed: 1942038 
• DOI: 10.1016/0022-2836(91)80185-w
• Primary Citation of Related Structures:  
  1OVA


• PubMed Abstract: 
  

Ovalbumin, the major protein in avian egg-white, is a non-inhibitory member of the serine protease inhibitor (serpin) superfamily. The crystal structure of uncleaved, hen ovalbumin was solved by the molecular replacement method using the structure of plakalbumin, a proteolytically cleaved form of ovalbumin, as a starting model. The final refined model, including four ovalbumin molecules, 678 water molecules and a single metal ion, has a crystallographic R-factor of 17.4% for all reflections between 6.0 and 1.95 A resolution. The root-mean-square deviation from ideal values in bond lengths is 0.02 A and in bond angles is 2.9 degrees. This is the first crystal structure of a member of the serpin family in an uncleaved form. Surprisingly, the peptide that is homologous to the reactive centre of inhibitory serpins adopts an alpha-helical conformation. The implications for the mechanism of inhibition of the inhibitory members of the family is discussed.

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Related Citations: 

• Crystal Structure of Ovalbumin as a Model for the Reactive Centre of Serpins
  Stein, P.E., Leslie, A.G.W., Finch, J.T., Turnell, W.G., Mclaughlin, P.J., Carrell, R.W.
  (1990) Nature 347: 99

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Organizational Affiliation: 

Department of Haematology, University of Cambridge, U.K.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
OVALBUMIN	A	386	Gallus gallus	Mutation(s): 0  Gene Names: SERPINB14
Find proteins for P01012 (Gallus gallus) Explore P01012  Go to UniProtKB:  P01012

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
OVALBUMIN	B	386	Gallus gallus	Mutation(s): 0  Gene Names: SERPINB14
Find proteins for P01012 (Gallus gallus) Explore P01012  Go to UniProtKB:  P01012

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
OVALBUMIN	C, D	386	Gallus gallus	Mutation(s): 0  Gene Names: SERPINB14
Find proteins for P01012 (Gallus gallus) Explore P01012  Go to UniProtKB:  P01012

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	A, B, C, D	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N
CA	A	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
SEP	A	L-PEPTIDE LINKING	C3 H8 N O6 P		SER

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Observed: 0.169 
• Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 62.9	α = 87.5
b = 84.7	β = 104
c = 71.5	γ = 108.5

Software Package:

Software Name	Purpose
PROLSQ	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1990-11-26 
• Released Date: 1992-04-15 
Deposition Author(s): Stein, P.E., Leslie, A.G.W.

Revision History 

• Version 1.0: 1992-04-15
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Non-polymer description, Version format compliance
• Version 1.3: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Data collection, Derived calculations, Other, Structure summary