3B7G: Human Dead-Box Rna Helicase Ddx20, Conserved Domain I (Dead) In Complex With Amppnp (Adenosine-(Beta,Gamma)-Imidotriphosphate)

Citation:
Abstract
DEAD-box RNA helicases play various, often critical, roles in all processes where RNAs are involved. Members of this family of proteins are linked to human disease, including cancer and viral infections. DEAD-box proteins contain two conserved domains that both contribute to RNA and ATP binding. Despite recent advances the molecular details of how these enzymes convert chemical energy into RNA remodeling is unknown. We present crystal structures of the isolated DEAD-domains of human DDX2A/eIF4A1, DDX2B/eIF4A2, DDX5, DDX10/DBP4, DDX18/myc-regulated DEAD-box protein, DDX20, DDX47, DDX52/ROK1, and DDX53/CAGE, and of the helicase domains of DDX25 and DDX41. Together with prior knowledge this enables a family-wide comparative structural analysis. We propose a general mechanism for opening of the RNA binding site. This analysis also provides insights into the diversity of DExD/H- proteins, with implications for understanding the functions of individual family members.
PDB ID: 3B7GDownload
MMDB ID: 60750
PDB Deposition Date: 2007/10/30
Updated in MMDB: 2007/11
Experimental Method:
x-ray diffraction
Resolution: 1.9  Å
Source Organism:
Similar Structures:
Biological Unit for 3B7G: monomeric; determined by author and by software (PISA)
Molecular Components in 3B7G
Label Count Molecule
Protein (1 molecule)
1
Probable Atp-dependent RNA Helicase Ddx20(Gene symbol: DDX20)
Molecule annotation
Chemical (1 molecule)
1
1
* Click molecule labels to explore molecular sequence information.

Citing MMDB
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