1EG7

THE CRYSTAL STRUCTURE OF FORMYLTETRAHYDROFOLATE SYNTHETASE FROM MOORELLA THERMOACETICA

Summary for 1EG7

• Entry DOI: 10.2210/pdb1eg7/pdb
• Descriptor: FORMYLTETRAHYDROFOLATE SYNTHETASE, SULFATE ION (3 entities in total)
• Functional Keywords: synthetase, folate binding, atp binding, formate binding, monovalent cation binding, ligase
• Biological source: Moorella thermoacetica
• Total number of polymer chains: 2
• Total formula weight: 120788.45

Authors

Radfar, R.,Shin, R.,Sheldrick, G.M.,Minor, W.,Lovell, C.R.,Odom, J.D.,Dunlap, R.B.,Lebioda, L. (deposition date: 2000-02-14, release date: 2001-02-14, Last modification date: 2024-02-07)

Primary citation

Radfar, R.,Shin, R.,Sheldrick, G.M.,Minor, W.,Lovell, C.R.,Odom, J.D.,Dunlap, R.B.,Lebioda, L.
The crystal structure of N(10)-formyltetrahydrofolate synthetase from Moorella thermoacetica.
Biochemistry, 39:3920-3926, 2000

PubMed Abstract: The structure was solved at 2.5 A resolution using multiwavelength anomalous dispersion (MAD) scattering by Se-Met residues. The subunit of N(10)-formyltetrahydrofolate synthetase is composed of three domains organized around three mixed beta-sheets. There are two cavities between adjacent domains. One of them was identified as the nucleotide binding site by homology modeling. The large domain contains a seven-stranded beta-sheet surrounded by helices on both sides. The second domain contains a five-stranded beta-sheet with two alpha-helices packed on one side while the other two are a wall of the active site cavity. The third domain contains a four-stranded beta-sheet forming a half-barrel. The concave side is covered by two helices while the convex side is another wall of the large cavity. Arg 97 is likely involved in formyl phosphate binding. The tetrameric molecule is relatively flat with the shape of the letter X, and the active sites are located at the end of the subunits far from the subunit interface.

PubMed: 10747779
DOI: 10.1021/bi992790z

Experimental method

X-RAY DIFFRACTION (2.5 Å)