Chemistry of Amino Acids Part 1 : Medical biochemistry
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- เผยแพร่เมื่อ 8 ก.ย. 2024
- 📌 𝐅𝐨𝐥𝐥𝐨𝐰 𝐨𝐧 𝐈𝐧𝐬𝐭𝐚𝐠𝐫𝐚𝐦:- / drgbhanuprakash
amino acid, any of a group of organic molecules that consist of a basic amino group (―NH2), an acidic carboxyl group (―COOH), and an organic R group (or side chain) that is unique to each amino acid. The term amino acid is short for α-amino [alpha-amino] carboxylic acid. Each molecule contains a central carbon (C) atom, called the α-carbon, to which both an amino and a carboxyl group are attached. The remaining two bonds of the α-carbon atom are generally satisfied by a hydrogen (H) atom and the R group.
Amino acids play central roles both as building blocks of proteins and as intermediates in metabolism. The 20 amino acids that are found within proteins convey a vast array of chemical versatility. Tertiary Structure of a proteinThe precise amino acid content, and the sequence of those amino acids, of a specific protein, is determined by the sequence of the bases in the gene that encodes that protein. The chemical properties of the amino acids of proteins determine the biological activity of the protein. Proteins not only catalyze all (or most) of the reactions in living cells, they control virtually all cellular process. In addition, proteins contain within their amino acid sequences the necessary information to determine how that protein will fold into a three dimensional structure, and the stability of the resulting structure. The field of protein folding and stability has been a critically important area of research for years, and remains today one of the great unsolved mysteries. It is, however, being actively investigated, and progress is being made every day.
As we learn about amino acids, it is important to keep in mind that one of the more important reasons to understand amino acid structure and properties is to be able to understand protein structure and properties. We will see that the vastly complex characteristics of even a small, relatively simple, protein are a composite of the properties of the amino acids which comprise the protein.
Essential amino acids
Humans can produce 10 of the 20 amino acids. The others must be supplied in the food. Failure to obtain enough of even 1 of the 10 essential amino acids, those that we cannot make, results in degradation of the body's proteins-muscle and so forth-to obtain the one amino acid that is needed. Unlike fat and starch, the human body does not store excess amino acids for later use-the amino acids must be in the food every day.
The 10 amino acids that we can produce are alanine, asparagine, aspartic acid, cysteine, glutamic acid, glutamine, glycine, proline, serine and tyrosine. Tyrosine is produced from phenylalanine, so if the diet is deficient in phenylalanine, tyrosine will be required as well. The essential amino acids are arginine (required for the young, but not for adults), histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine. These amino acids are required in the diet. Plants, of course, must be able to make all the amino acids. Humans, on the other hand, do not have all the the enzymes required for the biosynthesis of all of the amino acids.
Why learn these structures and properties?
It is critical that all students of the life sciences know well the structure and chemistry of the amino acids and other building blocks of biological molecules. Otherwise, it is impossible to think or talk sensibly about proteins and enzymes, or the nucleic acids.
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Stupendous ✨ Explaination for all kind of students to understand easily and will be very helpful for competitive exams, Thank you so much sir for providing this type of content in TH-cam
Glad it was helpful!
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We need part 2!!!!
th-cam.com/video/wLdDitV4eko/w-d-xo.html
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As soon as possible
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Amino acids helps in increasing amniotic fluid at 24 weeks my doctor gave me infusion every second day for a week ... amino acids will help????
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Enough for Msc biotechnology sem 1st?
Sir please draw the structure of beta amino acid in detail.
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Can any one tell me how to get notes of this video lec ?
Kindly reply
Sir can you please give the reference book ?
Name kindly?
Harper's Biochemistry or Leninger's Biochemistry
Sir do you have videos on chemistry of carbohydrates
Yeah he has. You just gotta look on his channel as they were published about a month ago
Arginine are essential or non essential
Semi-essential
Hmm
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Nidhiyadav ❤❤❤🎉🎉Nice sir
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Most welcome