Structural insights into binding of polyglutamylated tetrahydrofolate by serine hydroxymethyltransferase 8 from soybean
Journal Article
·
· Frontiers in Plant Science
- University of Missouri, Columbia, MO (United States)
- University of Georgia, Athens, GA (United States)
Tetrahydrofolate and its derivatives participate in one-carbon transfer reactions in all organisms. The cellular form of tetrahydrofolate (THF) is modified by multiple glutamate residues and polyglutamylation plays a key role in organellar and cellular folate homeostasis. In addition, polyglutamylation of THF is known to increase the binding affinity to enzymes in the folate cycle, many of which can utilize polyglutamylated THF as a substrate. Here, we use X-ray crystallography to provide a high-resolution view of interactions between the enzyme serine hydroxymethyltransferase (SHMT), which provides one carbon precursors for the folate cycle, and a polyglutamylated form of THF. Our 1.7 Å crystal structure of soybean SHMT8 in complex with diglutamylated 5-formyl-THF reveals, for the first time, a structural rearrangement of a loop at the entrance to the folate binding site accompanied by the formation of novel specific interactions between the enzyme and the diglutamyl tail of the ligand. Biochemical assays show that additional glutamate moieties on the folate ligand increase both enzyme stability and binding affinity. Together these studies provide new information on SHMT structure and function and inform the design of anti-folate agents.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Sponsoring Organization:
- National Institutes of Health (NIH); National Science Foundation (NSF); USDA; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 2471063
- Journal Information:
- Frontiers in Plant Science, Journal Name: Frontiers in Plant Science Vol. 15; ISSN 1664-462X
- Publisher:
- Frontiers Research FoundationCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Impaired folate binding of serine hydroxymethyltransferase 8 from soybean underlies resistance to the soybean cyst nematode
Structural basis of methotrexate and pemetrexed action on serine hydroxymethyltransferases revealed using plant models
Structural and functional analysis of two SHMT8 variants associated with soybean cyst nematode resistance
Journal Article
·
Sat Feb 01 19:00:00 EST 2020
· Journal of Biological Chemistry
·
OSTI ID:1616596
Structural basis of methotrexate and pemetrexed action on serine hydroxymethyltransferases revealed using plant models
Journal Article
·
Sat Nov 30 19:00:00 EST 2019
· Scientific Reports
·
OSTI ID:1624518
Structural and functional analysis of two SHMT8 variants associated with soybean cyst nematode resistance
Journal Article
·
Sat Oct 14 20:00:00 EDT 2023
· Federation of European Biochemical Societies (FEBS) Journal
·
OSTI ID:2582710