ISDA

Entry Detail

PDB ID:

1P8X

Keywords:

STRUCTURAL PROTEIN

Title:

The Calcium-Activated C-terminal half of gelsolin

Biological Source:

Source Organism:

Homo sapiens

Host Organism:

Escherichia coli

PDB Version:

Deposition Date:

2003-05-08

Release Date:

2003-10-14

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.00 Å

R-Value Free:

0.24

R-Value Work:

0.20

R-Value Observed:

0.20

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Gelsolin precursor, plasma
Chain IDs:A, B, C
Chain Length:344
Number of Molecules:3
Biological Source:Homo sapiens

UniProt ID:P06396 Pfam ID:PF00626

Ligand Molecules

Primary Citation

Activation in isolation: Exposure of the actin-binding site in the C-terminal half of gelsolin does not require actin

Narayan, K, Chumnarnsilpa, S, Choe, H, Irobi, E, Urosev, D, Lindberg, U, Schutt, C.E, Burtnick, L.D, Robinson, R.C.Show

FEBS LETT. 552 82 85 (2003)

PMID: 14527664 DOI: 10.1016/S0014-5793(03)00933-5

Abstact

Gelsolin requires activation to carry out its severing and capping activities on F-actin. Here, we present the structure of the isolated C-terminal half of gelsolin (G4-G6) at 2.0 A resolution in the presence of Ca(2+) ions. This structure completes a triptych of the states of activation of G4-G6 that illuminates its role in the function of gelsolin. Activated G4-G6 displays an open conformation, with the actin-binding site on G4 fully exposed and all three type-2 Ca(2+) sites occupied. Neither actin nor the type-l Ca(2+), which normally is sandwiched between actin and G4, is required to achieve this conformation.

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Primary Citation of related structures