4ZA0 | pdb_00004za0

SF2312 is a natural phosphonate inhibitor of enolase.

(2016) Nat Chem Biol 12: 1053-1058

• PubMed: 27723749 Search on PubMedSearch on PubMed Central
• DOI: https://doi.org/10.1038/nchembio.2195
• Primary Citation Related Structures: 
  4ZA0, 4ZCW


• PubMed Abstract: 
  

  Despite being crucial for energy generation in most forms of life, few if any microbial antibiotics specifically inhibit glycolysis. To develop a specific inhibitor of the glycolytic enzyme enolase 2 (ENO2) for the treatment of cancers with deletion of ENO1 (encoding enolase 1), we modeled the synthetic tool compound inhibitor phosphonoacetohydroxamate (PhAH) into the active site of human ENO2. A ring-stabilized analog of PhAH, in which the hydroxamic nitrogen is linked to Cα by an ethylene bridge, was predicted to increase binding affinity by stabilizing the inhibitor in a bound conformation. Unexpectedly, a structure-based search revealed that our hypothesized backbone-stabilized PhAH bears strong similarity to SF2312, a phosphonate antibiotic of unknown mode of action produced by the actinomycete Micromonospora, which is active under anaerobic conditions. Here, we present multiple lines of evidence, including a novel X-ray structure, that SF2312 is a highly potent, low-nanomolar inhibitor of enolase.

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Organizational Affiliation: 
• Department of Genomic Medicine and Core for Biomolecular Structure and Function, University of Texas MD Anderson Cancer Center, Houston, TX 77054.
Department of Cancer Systems Imaging, University of Texas MD Anderson Cancer Center, Houston, TX 77054.
Department of Clinical Analytics & Informatics, Houston, TX 77054-3403.
Cardtronics, Inc., Houston, TX 77042.
Institute for Applied Cancer Science, University of Texas MD Anderson Cancer Center, Houston, TX 77054.
Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02115.
Department of Cancer Biology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA University of Texas MD Anderson Cancer Center, Houston, TX 77054 USA.
Bayou Therapeutics, Inc, Missouri City, TX 77459-3028.