Substrate interactions with the nitrogenase active site

Patricia C. Dos Santos, Robert Y. Igarashi, Hong In Lee, Brian M. Hoffman, Lance C. Seefeldt, Dennis R. Dean*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

181 Scopus citations


The chemical mechanism for biological cleavage of the N 2 triple bond at ambient pressure and temperature has been the subject of intense study for many years. The site of substrate activation and reduction has been localized to a complex cofactor, called FeMo cofactor, yet until now the complexity of the system has denied information concerning exactly where and how substrates interact with the metal-sulfur framework of the active site. In this Account, we describe a combined genetic, biophysical, and biochemical approach that was used to provide direct and detailed information concerning where alternative alkyne substrates interact with FeMo cofactor during catalysis. The relevance and limitations of this work with respect to N 2 binding and reduction also are discussed.

Original languageEnglish (US)
Pages (from-to)208-214
Number of pages7
JournalAccounts of chemical research
Issue number3
StatePublished - Mar 2005

ASJC Scopus subject areas

  • Chemistry(all)


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