The NifS and NifU proteins from Azotobacter vinelandii are required for the full activation of
nitrogenase. NifS is a homodimeric cysteine desulfurase that supplies the inorganic sulfide …

Abstract The NifS and NifU nitrogen fixation-specific gene products are required for the full
activation of both the Fe-protein and MoFe-protein of nitrogenase from Azotobacter …

The nitrogen-fixing organism Azotobacter vinelandii contains at least two systems that
catalyze formation of [Fe-S] clusters. One of these systems is encoded by nif genes, whose …

NifU is a homodimeric modular protein comprising N-and C-terminal domains and a central
domain with a redox-active [2Fe− 2S] 2+,+ cluster. It plays a crucial role as a scaffold protein …

Biological nitrogen fixation is catalyzed by nitrogenase, an enzyme comprised of two
component proteins called the Fe protein and the MoFe protein. Both nitrogenase …

The NifU protein is a homodimer that is proposed to provide a molecular scaffold for the
assembly of [Fe-S] clusters uniquely destined for the maturation of the nitrogenase catalytic …

Biological nitrogen fixation is catalyzed by nitrogenase, a complex metalloenzyme
composed of two separately purifiable component proteins encoded by the structural genes …

Revised Manuscript Received February 10, 1994• abstract: The nifS gene product (NIFS) is
a pyridoxal phosphate binding enzyme that catalyzes the desulfurization of L-cysteine to …

Iron-sulfur clusters ([Fe-S] clusters) are assembled on molecular scaffolds and subsequently
used for maturation of proteins that require [Fe-S] clusters for their functions. Previous …

The mechanism of [4Fe-4S] cluster assembly on A-type Fe–S cluster assembly proteins, in
general, and the specific role of NifIscA in the maturation of nitrogen fixation proteins are …