2VBS image
Entry Detail
PDB ID:
2VBS
Keywords:
Title:
Riboflavin kinase Mj0056 from Methanocaldococcus jannaschii in complex with PO4
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2007-09-16
Release Date:
2007-11-20
Method Details:
Experimental Method:
Resolution:
3.00 Å
R-Value Free:
0.28
R-Value Work:
0.23
R-Value Observed:
0.23
Space Group:
P 43 21 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:RIBOFLAVIN KINASE
Chain IDs:A
Chain Length:136
Number of Molecules:1
Biological Source:METHANOCOCCUS JANNASCHII
Primary Citation
A Ctp-Dependent Archaeal Riboflavin Kinase Forms a Bridge in the Evolution of Cradle-Loop Barrels.
Structure 15 1577 ? (2007)
PMID: 18073108 DOI: 10.1016/J.STR.2007.09.027

Abstact

Proteins of the cradle-loop barrel metafold are formed by duplication of a conserved betaalphabeta-element, suggesting a common evolutionary origin from an ancestral group of nucleic acid-binding proteins. The basal fold within this metafold, the RIFT barrel, is also found in a wide range of enzymes, whose homologous relationship with the nucleic acid-binding group is unclear. We have characterized a protein family that is intermediate in sequence and structure between the basal group of cradle-loop barrels and one family of RIFT-barrel enzymes, the riboflavin kinases. We report the structure, substrate-binding mode, and catalytic activity for one of these proteins, Methanocaldococcus jannaschii Mj0056, which is an archaeal riboflavin kinase. Mj0056 is unusual in utilizing CTP rather than ATP as the donor nucleotide, and sequence conservation in the relevant residues suggests that this is a general feature of archaeal riboflavin kinases.

Legend

Protein

Chemical

Disease

Primary Citation of related structures