T3 coppers are EPR silent when oxidized due to antiferromagnetic coupling of the spins, as are all types of copper centers in their reduced states (Cu1+, 3d10, S=0). Examples of other distinct types of copper centers include CuA and CuB of cytochrome c oxidase (CcO) (Section 8.5.
Which copper biomolecule is EPR silent?
Type III copper proteins contain antiferromagnetically coupled copper dimers. These proteins are diamagnetic and therefore are EPR silent.
What is a Type 3 copper protein?
Tyrosinases, tyrosinase-related proteins, catechol oxidases and hemocyanins comprise the type-3 copper protein family and are involved in a variety of biological processes, including pigment formation, innate immunity and oxygen transport.
What is a blue copper protein?
Blue copper proteins are type-I copper-containing redox proteins whose role is to shuttle electrons from an electron donor to an electron acceptor in bacteria and plants.
What are copper containing proteins?
Copper-containing proteins for which three-dimensional structures were known before 1990 include: the small blue copper proteins, known as cupredoxins, whose function is electron transfer (plastocyanin, azurin, cu- cumber basic protein and pseudoazurin); superoxide dismutase, a superoxide scavenger; hemocyanin, an oxy- …
Is hemocyanin a blue copper protein?
Hemocyanin, a copper-containing protein chemically unlike hemoglobin, is found in some crustaceans. Hemocyanin is blue in colour when oxygenated and colourless when oxygen is removed.
Is Plastocyanin a protein?
Plastocyanin is a 10 kD blue copper protein which is located in the lumen of the thylakoid where it functions as a mobileelectron carrier shuttling electrons from cytochromef to P700 in Photosystem I.
Which of the following are all the blue copper proteins?
We have studied the blue copper proteins plastocyanin, azurin, cucumber basic protein (CBP) and nitrite reductase (NiR) (159,160). We shall focus on these four in the remainder of this section.
Which copper protein is present in brain?
The results obtained led to the conclusion that in brain a new copper protein is discovered, which is named neurocuprein.