ISDA

Entry Detail

PDB ID:

1RFJ

Keywords:

METAL BINDING PROTEIN

Title:

Crystal Structure of Potato Calmodulin PCM6

Biological Source:

Source Organism:

Solanum tuberosum

Host Organism:

Escherichia coli

PDB Version:

Deposition Date:

2003-11-10

Release Date:

2004-06-29

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.00 Å

R-Value Free:

0.25

R-Value Work:

0.22

R-Value Observed:

0.23

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:calmodulin
Chain IDs:A
Chain Length:149
Number of Molecules:1
Biological Source:Solanum tuberosum

UniProt ID:Q7DMN9 Pfam ID:PF13499

Ligand Molecules

MPD

Primary Citation

Structure of potato calmodulin PCM6: the first report of the three-dimensional structure of a plant calmodulin.

Yun, C.H, Bai, J, Sun, D.Y, Cui, D.F, Chang, W.R, Liang, D.C.Show

Acta Crystallogr.,Sect.D 60 1214 1219 (2004)

PMID: 15213382 DOI: 10.1107/S0907444904009771

Abstact

The crystal structure of a potato calmodulin (PCM6) was solved by molecular replacement and refined to a crystallographic R factor of 22.8% (R(free) = 25.0%) using X-ray diffraction data in the resolution range 8.0-2.0 A. This is the first report of the three-dimensional structure of a plant Ca(2+)-calmodulin. PCM6 crystallizes in a crystal form that belongs to space group P2(1)2(1)2(1), which is different to that of most other calmodulin crystals. The main structural difference between PCM6 and the other calmodulins is in the central helix region and appears to be caused by crystal packing. The surface properties of PCM6 molecules were compared with those of animal calmodulins, which provided an explanation for the unique crystal-packing state of PCM6.

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Primary Citation of related structures