Biochemistry: The Molecular Basis of Life
Biochemistry: The Molecular Basis of Life
6th Edition
ISBN: 9780190209896
Author: Trudy McKee, James R. McKee
Publisher: Oxford University Press
bartleby

Concept explainers

bartleby

Videos

Question
Book Icon
Chapter 14, Problem 1Q
Summary Introduction

To review:

The structures ofproducts of the reaction between nitrogenase complex and substrates hydrogen cyanide, dinitroge, nnd acetylene.

Introduction:

Nitrogenase complex is present in all the species that can fix nitrogen. It is produced by bacteria such as cyanobacteria. This reduces nitrogen (N2) to ammonia (NH3). This is the only enzyme that can catalyze the reaction for nitrogen fixation.

Expert Solution & Answer
Check Mark

Explanation of Solution

The nitrogenase complex consists of two proteins called dinitrogenase as well asdinitrogenase reductase. The dinitrogenase is heterotetramer of MoFe protein. The dinitrogenase reductase is called Fe(ferrous) protein. It contains Mg-ATP (magnesium-adenosine triphosphate)-binding sites. In the reaction catalyzed by this complex, there is a transfer of electrons from (4Fe-4S) cluster in Fe protein. The Fe transfers the electrons to Mo-Fe protein. The transfer of electrons leads to a reduction of H+. The incoming N2 exchanges withH+ within the active site to form stable intermediates. So, the reaction of nitrogenasecomplex with the given substrates is as follows:

When nitrogenase complex reacts with cyanide, it gives two product, sethylamine and methan, elong with ammonia:

Biochemistry: The Molecular Basis of Life, Chapter 14, Problem 1Q , additional homework tip  1

When nitrogenase complex reacts with acetylene, it gives ethylene as a product:

Biochemistry: The Molecular Basis of Life, Chapter 14, Problem 1Q , additional homework tip  2

When nitrogenase complex reacts with dinitrogen, it gives hydrazine or ammonia as a product:

Biochemistry: The Molecular Basis of Life, Chapter 14, Problem 1Q , additional homework tip  3

Conclusion

Thus, it can be concluded that the products of substrates hydrogen cyanide, acetylen, endnitrogen are methylamine, ethylene, and hydrazine, respectively.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
Make an electron-flow-mechanism for this synthetic scheme. This involves predicting major and by-products using electronic and structural effects. The arrow push mechanism must be shown.(from the reaction of α-ketoacids and oxaprolines to proteins that contain native serine residues ) with label
Chymotrypsin has the highest affinity for which of the following substrates: Table. The values of KM and kcat for some Enzymes and Substrates Enzyme Chymotrypsin Ки (М) 4.4 x 10-1 8.8 x 10-2 6.6 x 104 Kcat (S-1) 5.1 x 10-2 1.7 x 10-1 1.9 x 102 Substrate N-acetylglycine ethyl ester N-acetylvaline ethyl ester N-acetyltyrosine ethyl ester Catalase H2O2 2.5 x 10-2 1.0 x 107 Urease Urea 2.5 x 10-2 4.0 x 105 OA. N-acetylglycine ethyl ester OB. N-acetylvaline ethyl ester OC. N-acetyltyrosine ethyl ester D. Urea
1. Draw the structure of the L-isomer of the Fisher projection of one epimer of D-allopyronoside. Discuss why is this an epimer of the monosaccharide. 2. Is this saccharide a good substrate for glycolysis? Explain.
Knowledge Booster
Background pattern image
Biochemistry
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biochemistry and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
  • Text book image
    Biochemistry
    Biochemistry
    ISBN:9781305577206
    Author:Reginald H. Garrett, Charles M. Grisham
    Publisher:Cengage Learning
Text book image
Biochemistry
Biochemistry
ISBN:9781305577206
Author:Reginald H. Garrett, Charles M. Grisham
Publisher:Cengage Learning
Metabolic Pathways; Author: Wisc-Online;https://www.youtube.com/watch?v=m61bQYio9ys;License: Standard Youtube License