Crystal structure of bifunctional 5,10-methylenetetrahydrofolate dehydrogenase/cyclohydrolase from Thermoplasma acidophilum
- Authors
- Lee, Won Ho; Sung, Min Woo; Kim, Jae Hee; Kim, Young Kwan; Han, Arum; Hwang, Kwang Yeon
- Issue Date
- 18-3월-2011
- Publisher
- ACADEMIC PRESS INC ELSEVIER SCIENCE
- Keywords
- 5,10-Methylenetetrahydrofolate dehydrogenase/cyclohydrolase; Tetrahydrofolate pathway; One-carbon metabolism; NADP complex structure; Folate
- Citation
- BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, v.406, no.3, pp.459 - 463
- Indexed
- SCIE
SCOPUS
- Journal Title
- BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
- Volume
- 406
- Number
- 3
- Start Page
- 459
- End Page
- 463
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/112836
- DOI
- 10.1016/j.bbrc.2011.02.074
- ISSN
- 0006-291X
- Abstract
- Folate co-enzymes play a pivotal role in one-carbon transfer cellular processes. Many eukaryotes encode the tri-functional tetrahydrofolate dehydrogenase/cyclohydrolase/synthetase (deh/cyc/syn) enzyme, which consists of a N-terminal bifunctional domain (deh/cyc) and a C-terminal monofunctional domain (syn). Here, we report the first analogous archeal enzyme structures, for the bifunctional methylenetetrahydrofolate dehydrogenase/cyclohydrolase from Thermoplasma acidophilum (TaMTHFDC) as the native protein and also as its NADP complex. The TaMTHFDC structure is a dimer with a polar interface, as well as a NADP binding site that shows minor conformational change. The orientations of the residues in the NADP binding site do not change on ligand binding, incorporating three water molecules which are hydrogen bonded with phosphate groups of NADP in the structure of the complex. Our structural information will contribute to an improved understanding of the basis of THF and one-carbon metabolism. (C) 2011 Elsevier Inc. All rights reserved.
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