1B33

STRUCTURE OF LIGHT HARVESTING COMPLEX OF ALLOPHYCOCYANIN ALPHA AND BETA CHAINS/CORE-LINKER COMPLEX AP*LC7.8


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural analysis at 2.2 A of orthorhombic crystals presents the asymmetry of the allophycocyanin-linker complex, AP.LC7.8, from phycobilisomes of Mastigocladus laminosus.

Reuter, W.Wiegand, G.Huber, R.Than, M.E.

(1999) Proc.Natl.Acad.Sci.USA 96: 1363-1368


  • PubMed Abstract: 
  • An electrophoretically purified allophycocyanin-linker complex, AP. LC7.8, from phycobilisomes of Mastigocladus laminosus has been crystallized in the orthorhombic space group P212121. Cryocrystallographic x-ray measurements enabled the structural an ...

    An electrophoretically purified allophycocyanin-linker complex, AP. LC7.8, from phycobilisomes of Mastigocladus laminosus has been crystallized in the orthorhombic space group P212121. Cryocrystallographic x-ray measurements enabled the structural analysis of the complex at a resolution of 2.2 A. The asymmetric unit contains two side-to-side associated "trimeric" (alphabeta)3 allophycocyanin complexes comprising the linker polypeptide in a defined orientation inside the trimer. The linker representing a protein fold related to the prosegment of procarboxypeptidase A is in contact with only two of the three beta-subunits and directly interacts with the corresponding chromophores of these proteins. In addition to a modulation of the chromophores' spectral properties, the linker polypeptide attracts the alphabeta-subcomplexes, thereby bringing the beta-chromophores closer together. These results will enable interpretations of energy-transfer mechanisms within phycobiliproteins.


    Related Citations: 
    • Minor Polypeptides from the Cyanobacterium Mastigocladus Laminosus
      Fueglistaller, P.,Ruembli, R.,Suter, F.,Zuber, H.
      (1984) Hoppe-Seyler's Z.Physiol.Chem. 365: 1085
    • Isolation, Crystallization, Crystal Structure Analysis and Refinement of Allophycocyanin from the Cyanobacterium Spirulina Platensis at 2.3 A Resolution
      Brejc, K.,Ficner, R.,Huber, R.,Steinbacher, S.
      (1995) J.Mol.Biol. 249: 424
    • The Complete Amino Acid Sequence of Both Subunits of Allophycocyanin, a Light Harvesting Protein-Pigment Complex from the Cyanobacterium Mastigocladus Laminosus
      Sidler, W.,Gysi, J.,Isker, E.,Zuber, H.
      (1981) Hoppe-Seyler's Z.Physiol.Chem. 362: 611


    Organizational Affiliation

    Max-Planck-Institut für Biochemie, Am Klopferspitz 18A, D-82158 Martinsried, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ALLOPHYCOCYANIN, ALPHA CHAIN
A, C, E, H, J, L
160Mastigocladus laminosusGene Names: apcA
Find proteins for P00315 (Mastigocladus laminosus)
Go to UniProtKB:  P00315
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ALLOPHYCOCYANIN, BETA CHAIN
B, D, F, I, K, M
161Mastigocladus laminosusGene Names: apcB
Find proteins for P00318 (Mastigocladus laminosus)
Go to UniProtKB:  P00318
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
PHYCOBILISOME 7.8 KD LINKER POLYPEPTIDE
N, O
67Mastigocladus laminosusGene Names: apcC
Find proteins for P20116 (Mastigocladus laminosus)
Go to UniProtKB:  P20116
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CYC
Query on CYC

Download SDF File 
Download CCD File 
C, D, E, F, H, I, J, K, L, M
PHYCOCYANOBILIN
C33 H40 N4 O6
VXTXPYZGDQPMHK-GMXXPEQVSA-N
 Ligand Interaction
BO4
Query on BO4

Download SDF File 
Download CCD File 
C, E, J, L
BORATE ION
B H4 O4
KCFLOKKYWBPKFN-UHFFFAOYSA-N
 Ligand Interaction
BLA
Query on BLA

Download SDF File 
Download CCD File 
A, B
BILIVERDINE IX ALPHA
C33 H34 N4 O6
GWZYPXHJIZCRAJ-SRVCBVSDSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MEN
Query on MEN
B, D, F, I, K, M
L-PEPTIDE LINKINGC5 H10 N2 O3ASN
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.211 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 176.120α = 90.00
b = 151.900β = 90.00
c = 137.850γ = 90.00
Software Package:
Software NamePurpose
CCP4data scaling
X-PLORrefinement
AMoREphasing
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-02-23
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance