The effects of salinity and other factors on nitrite reduction by Ochrobactrum anthropi 49187.
The nitrite reductase (NIR) gene was cloned from Ochrobactrum anthropi 49187 and found to contain an open reading frame of 1131 nucleotides, encoding a polypeptide of 376 amino acids. The O. anthropi NIR gene encodes a copper-type dissimilatory reductase based on sequence homology with other genes. The polypeptide product is predicted to form a trimeric holoenzyme of 37 kDa subunits based on molecular weight estimates of extracts in activity gels. Expression of the enzyme is up-regulated by nitrate, presumably through the intermediate nitrite, and its activity is influenced by inhibitors. Salinity enhances the activity of existing NIR enzyme, but appears to decrease the expression of new enzyme.
Causey
Margaret B
MB
Peace College, 15 East Peace Street, Raleigh, NC 27604, USA.
Beane
Kimberly N
KN
Wolf
Joe R
JR
D000595:Amino Acid Sequence; D015964:Gene Expression Regulation, Bacterial; D005798:Genes, Bacterial; D008969:Molecular Sequence Data; D009572:Nitrite Reductases / Q000235:genetics* / Q000302:isolation & purification / Q000378:metabolism; D009573:Nitrites / Q000378:metabolism*; D020621:Ochrobactrum anthropi / Q000201:enzymology / Q000235:genetics* / Q000254:growth & development; D010084:Oxidation-Reduction; D012965:Sodium Chloride
D009573:Nitrites; D012965:Sodium Chloride; D009572:Nitrite Reductases