Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

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

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

Macromolecule Content

• Total Structure Weight: 41.80 kDa 
• Atom Count: 3411 
• Modelled Residue Count: 360 
• Deposited Residue Count: 362 
• Unique protein chains: 1

1S2P

The structure and refinement of apocrustacyanin C2 to 1.3A resolution and the search for differences between this protein and the homologous apoproteins A1 and C1

• PDB DOI: 10.2210/pdb1S2P/pdb

• Classification: PROTEIN BINDING
• Organism(s): Homarus gammarus
• Mutation(s): No 


• Deposited: 2004-01-09 Released: 2004-03-02 
• Deposition Author(s): Habash, J., Helliwell, J.R., Raftery, J., Cianci, M., Rizkallah, P.J., Chayen, N.E., NNeji, G.A., Zakalsky, P.F.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.30 Å
• R-Value Free: 0.215 
• R-Value Work: 0.189 
• R-Value Observed: 0.190 

Literature

The structure and refinement of apocrustacyanin C2 to 1.3 A resolution and the search for differences between this protein and the homologous apoproteins A1 and C1.

Habash, J., Helliwell, J.R., Raftery, J., Cianci, M., Rizkallah, P.J., Chayen, N.E., Nneji, G.A., Zagalsky, P.F.

(2004) Acta Crystallogr D Biol Crystallogr 60: 493-498

• PubMed: 14993674 
• DOI: 10.1107/S090744490400037X
• Primary Citation of Related Structures:  
  1S2P, 1S44


• PubMed Abstract: 
  

The blue carotenoprotein alpha-crustacyanin of Homarus gammarus lobster carapace is comprised chemically of five 20 kDa subunits. Only two genes for the proteins have been isolated (J. B. C. Findlay, personal communication) and the five apoproteins fall into two sets of homologous proteins based on their chemical properties (CRTC, consisting of apoproteins C(1), C(2) and A(1), and CRTA, consisting of apoproteins A(2) and A(3)). The diffraction quality of apo C(2) has been improved from 2.2 to 1.3 A and its structure solved. The structure is compared with the A(1) and C(1) proteins determined at 1.4 A [Cianci et al. (2001), Acta Cryst. D57, 1219-1229] and 1.15 A, respectively [Gordon et al. (2001), Acta Cryst. D57, 1230-1237] and found to be very similar. Normalized B-factor difference plots per residue of different types were used to try to find chemically modified residues; none were found at these resolutions. It remains possible that the differences between the CRTC proteins result from differences in amidation. By comparison of a crystal grown with glycerol (studied at 1.6 A) and one grown without glycerol (studied at 1.3 A) it was seen that glycerol bound at the astaxanthin site.

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Related Citations: 

• Structure of lobster apocrustacyanin A1 using softer X-rays
  (2001) Acta Crystallogr D Biol Crystallogr 57: 1219

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Organizational Affiliation: 

Section of Structural Chemistry, Department of Chemistry, University of Manchester, Manchester M13 9PL, England.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Crustacyanin C2 subunit	A, B	181	Homarus gammarus	Mutation(s): 0
UniProt
Find proteins for P80029 (Homarus gammarus) Explore P80029  Go to UniProtKB:  P80029

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MPD	D [auth A], E [auth A]	(4S)-2-METHYL-2,4-PENTANEDIOL C6 H14 O2 SVTBMSDMJJWYQN-YFKPBYRVSA-N
SO4	C [auth A], F [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.30 Å
• R-Value Free: 0.215 
• R-Value Work: 0.189 
• R-Value Observed: 0.190 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 41.148	α = 90
b = 79.846	β = 90
c = 110.263	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
CCP4	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-01-09 
• Released Date: 2004-03-02 
Deposition Author(s): Habash, J., Helliwell, J.R., Raftery, J., Cianci, M., Rizkallah, P.J., Chayen, N.E., NNeji, G.A., Zakalsky, P.F.

Revision History  

• Version 1.0: 2004-03-02
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2018-04-04
  Changes: Advisory, Data collection