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The amino acid side chain high affinity for Ca2+ and Cu2+ in metallo–proteins is:
- a)Carboxylate in both the cases.
- b)Imidazole in both the cases.
- c)Carboxylate for Ca2+ and imidazo le for Cu2+.
- d)Imidazole for Ca2+ and carboxylate for Cu2+.
Correct answer is option 'C'. Can you explain this answer?
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The amino acid side chain high affinity for Ca2+ and Cu2+ in metallo&#...
Metalloproteins are proteins that contain metal ions as an integral part of their structure and function. The amino acid side chains in these proteins have a high affinity for metal ions such as Ca2+ and Cu2+. The correct answer is option C, which states that carboxylate is the high-affinity side chain for Ca2+ and imidazole is the high-affinity side chain for Cu2+.
Carboxylate Side Chain for Ca2+
The carboxylate side chain is a negatively charged group that is present in amino acids such as aspartate and glutamate. This side chain has a high affinity for metal ions such as Ca2+ due to its negative charge. Ca2+ ions are essential for many biological processes such as muscle contraction, neurotransmitter release, and blood clotting. Metalloproteins that bind Ca2+ ions include calmodulin, troponin C, and osteocalcin.
Imidazole Side Chain for Cu2+
The imidazole side chain is a nitrogen-containing group that is present in the amino acid histidine. This side chain has a high affinity for metal ions such as Cu2+ due to its ability to coordinate with the metal ion through its nitrogen atoms. Cu2+ ions are essential for many biological processes such as electron transport, oxidative metabolism, and iron absorption. Metalloproteins that bind Cu2+ ions include ceruloplasmin, cytochrome c oxidase, and dopamine β-hydroxylase.
In conclusion, the amino acid side chains in metalloproteins have a high affinity for metal ions such as Ca2+ and Cu2+. The carboxylate side chain is the high-affinity side chain for Ca2+ ions, while the imidazole side chain is the high-affinity side chain for Cu2+ ions.
Carboxylate Side Chain for Ca2+
The carboxylate side chain is a negatively charged group that is present in amino acids such as aspartate and glutamate. This side chain has a high affinity for metal ions such as Ca2+ due to its negative charge. Ca2+ ions are essential for many biological processes such as muscle contraction, neurotransmitter release, and blood clotting. Metalloproteins that bind Ca2+ ions include calmodulin, troponin C, and osteocalcin.
Imidazole Side Chain for Cu2+
The imidazole side chain is a nitrogen-containing group that is present in the amino acid histidine. This side chain has a high affinity for metal ions such as Cu2+ due to its ability to coordinate with the metal ion through its nitrogen atoms. Cu2+ ions are essential for many biological processes such as electron transport, oxidative metabolism, and iron absorption. Metalloproteins that bind Cu2+ ions include ceruloplasmin, cytochrome c oxidase, and dopamine β-hydroxylase.
In conclusion, the amino acid side chains in metalloproteins have a high affinity for metal ions such as Ca2+ and Cu2+. The carboxylate side chain is the high-affinity side chain for Ca2+ ions, while the imidazole side chain is the high-affinity side chain for Cu2+ ions.
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The amino acid side chain high affinity for Ca2+ and Cu2+ in metallo–proteins is:a)Carboxylate in both the cases.b)Imidazole in both the cases.c)Carboxylate for Ca2+ and imidazo le for Cu2+.d)Imidazole for Ca2+ and carboxylate for Cu2+.Correct answer is option 'C'. Can you explain this answer?
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