PDBsum entry 2v8a

Electron transport

PDB id: 2v8a

Contents

Protein chains

160 a.a. *

161 a.a. *

Ligands

CYC ×2

* Residue conservation analysis

PDB id:

2v8a

Name:

Electron transport

Title:

The structure of thermosynechococcus elongatus allophycocyanin at 3.5 angstroems.

Structure:

Allophycocyanin alpha chain. Chain: a. Allophycocyanin beta chain. Chain: b

Source:

Thermosynechococcus elongatus. Organism_taxid: 197221. Strain: bp-1. Strain: bp-1

Resolution:

3.50Å R-factor: 0.261 R-free: 0.285

Authors:

J.W.Murray,K.Maghlaoui,J.Barber

Key ref:

J.W.Murray et al. (2007). The structure of allophycocyanin from Thermosynechococcus elongatus at 3.5 A resolution. Acta Crystallogr Sect F Struct Biol Cryst Commun, 63, 998. PubMed id: 18084078

Date:

06-Aug-07 Release date: 11-Dec-07

Protein chain

P50030  (PHAA_THEEB) -  Allophycocyanin alpha chain from Thermosynechococcus vestitus (strain NIES-2133 / IAM M-273 / BP-1)

Seq: 161 a.a.

Struc: 160 a.a.

Protein chain

P50031  (APCB_THEEB) -  Allophycocyanin beta chain from Thermosynechococcus vestitus (strain NIES-2133 / IAM M-273 / BP-1)

Seq: 161 a.a.

Struc: 161 a.a.*

* PDB and UniProt seqs differ at 1 residue position (black cross)

Acta Crystallogr Sect F Struct Biol Cryst Commun 63:998 (2007)

PubMed id: 18084078

The structure of allophycocyanin from Thermosynechococcus elongatus at 3.5 A resolution.

J.W.Murray, K.Maghlaoui, J.Barber.

ABSTRACT

Cyanobacteria and red algae use light-harvesting pigments bound by proteins to capture solar radiation and to channel excitation energy into their reaction centres. In most cyanobacteria, a multi-megadalton soluble structure known as the phycobilisome is a major light-harvesting system. Allophycocyanin is the main component of the phycobilisome core, forming a link between the rest of the phycobilisome and the reaction-centre core. The crystal structure of allophycocyanin from Thermosynechococcus elongatus (TeAPC) has been determined and refined at 3.5 A resolution to a crystallographic R value of 26.0% (R(free) = 28.5%). The structure was solved by molecular replacement using the allophycocyanin structure from Spirulina platensis as the search model. The asymmetric unit contains an (alphabeta) monomer which is expanded by symmetry to a crystallographic trimer.