Journal
JOURNAL OF BACTERIOLOGY
Volume 185, Issue 7, Pages 2383-2386Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/JB.185.7.2383-2386.2003
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Funding
- NIGMS NIH HHS [GM35332, R37 GM035332] Funding Source: Medline
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A gene from Azotobacter vinelandii whose product exhibits primary sequence similarity to the NifY, Nafy, NifX, and VnfX family of proteins, and which is required for effective V-dependent diazotrophic growth, was identified. Because this gene is located downstream from vnjK in an arrangement similar to the relative organization of the nifK and nifY genes, it was designated vnfY. A mutant strain having an insertion mutation in vnfY has 10-fold less vnf dinitrogenase activity and exhibits a greatly diminished level of V-49 label incorporation into the V-dependent dinitrogenase when compared to the wild type. These results indicate that VnfY has a role in the maturation of the V-dependent dinitrogenase, with a specific role in the formation of the V-containing cofactor and/or its insertion into apodinitrogenase.
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