ISDA

Deposition Date 2001-12-03

Release Date 2002-07-03

Last Version Date 2024-10-16

Entry Detail

PDB ID:

1KIB

Keywords:

ELECTRON TRANSPORT

Title:

cytochrome c6 from Arthrospira maxima: an assembly of 24 subunits in the form of an oblate shell

Biological Source:

Source Organism:

Arthrospira maxima (Taxon ID: 129910)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

3.50 Å

R-Value Free:

0.22

R-Value Work:

0.20

R-Value Observed:

0.20

Space Group:

I 41 3 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:cytochrome c6
Gene (Uniprot):petJ
Chain IDs:A, B, C, D, E, F, G, H
Chain Length:89
Number of Molecules:8
Biological Source:Arthrospira maxima

UniProt ID:P00118 Pfam ID:PF13442

Ligand Molecules

HEC

Primary Citation

Structure of cytochrome c6 from Arthrospira maxima: an assembly of 24 subunits in a nearly symmetric shell.

Kerfeld, C.A, Sawaya, M.R, Krogmann, D.W, Yeates, T.O, Sawaya, M.R, Krogmann, D.W, Serag, A, Ho, K.K, Yeates, T.O, Kerfeld, C.A.Show

Acta Crystallogr.,Sect.D 58 1104 1110 (2002)

PMID: 12077429 DOI: 10.1107/S0907444902006534

Abstact

Cytochrome c(6) from the cyanobacterium Arthrospira maxima is present in isoforms that can be resolved by size-exclusion chromatography. One isoform crystallized in space group I4(1)32 with eight protein molecules in the asymmetric unit and a total of 384 molecules in the unit cell. Within the crystal, the molecules are arranged as clusters of 24 cytochrome c(6) molecules. Each cluster is a hollow shell with approximate octahedral (432) symmetry. Structural and biochemical studies of cytochrome c(6) isolated from other cyanobacteria and algae have led to the suggestion that cytochrome c(6) forms oligomers. The cytochrome c(6) complex described here is the largest assembly of cytochrome c(6) molecules observed thus far.

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Primary Citation of related structures