Reductase Protiens

Question 1

What is the function of Copper Nitrite Reductase (CuNiR)?

Answer 1

Denitrifying bacteria

Question 2

What is the balanced reaction of Copper Nitrite Reductase (CuNiR)?

Answer 2

[NO2] + 2H + e –> NO + H2O

Question 3

What is the structure of Copper Nitrite Reductase (CuNiR)?

Answer 3

trimeric with 2 Cu centres
- Cu1: cupredoxin
- Cu2: [NO2] binding site

Question 4

What is the function of Cytochrome Cd1 Nitrite Reductase (Cd1NiR)?

Answer 4

Denitrifying bacteria

Question 5

What is the balanced reaction of Cytochrome Cd1 Nitrite Reductase (Cd1NiR)?

Answer 5

[NO2] + 2H + e –> NO + H2O

Question 6

What is the structure of Cytochrome Cd1 Nitrite Reductase (Cd1NiR)?

Answer 6

dimeric with 2 heme groups
- heme c: et to heme d1
- heme d1: binds substrate

Question 7

What is the function of Cytochrome C Nitrite Reductase (CcNiR)?

Answer 7

Assimilatory denitrifying bacteria

Question 8

What is the balanced reaction of Cytochrome C Nitrite Reductase (CcNiR)?

Answer 8

[NO2] + 8H + 6e –> [NH4] + 2H2O

Question 9

What is the structure of Cytochrome C Nitrite Reductase (CcNiR)?

Answer 9

dimeric with each subunit having 5 heme groups

Question 10

What is the metal centre of Cytochrome C Nitrite Reductase (CcNiR)?

Answer 10

Iron

Question 11

What is the metal centre of Cytochrome Cd1 Nitrite Reductase (Cd1NiR)?

Answer 11

Iron