The citric acid cycle is the principal process for generating reduced coenzymes NADH and FADH2, which are necessary for ATP synthesis. It takes place in the mitochondrial matrix and involves eight steps catalyzed by different enzymes. Acetyl-CoA enters the cycle and is oxidized, producing carbon dioxide and the reduced coenzymes that fuel ATP production. Regulation occurs at three steps to precisely adjust the cycle's rate according to cellular energy needs. Overall, 12 ATP molecules are generated for each acetyl-CoA molecule that completes the citric acid cycle.
Pentose phosphate pathway is an alternative pathway to glycolysis and TCA cycle for oxidation of glucose. It is a shunt of glycolysis. It is also known as hexose monophosphate (HMP) shunt or phosphogluconate pathway. It occurs in cytoplasm of both prokaryotes and eukaryotes. While it involves oxidation of glucose, its primary role is anabolic rather than catabolic. It is an important pathway that generates precursors for nucleotide synthesis and is especially important in red blood cells (erythrocytes).
Fatty acid oxidation
Types of fatty acid oxidation
Overview of fatty acid oxidation
Beta-Oxidation of fatty acid
Steps in Beta-Oxidation of fatty acid
Stoichiometry of Beta oxidation
Reference
This PPT is on Amino acid metabolism. And the topics covered under this ppt are Transamination, deamination
Book referred: https://www.amazon.in/Biochemistry-2019-Satyanarayana-Satyanarayana-Author/dp/B07WGHCTKZ/ref=sr_1_1?dchild=1&qid=1591608419&refinements=p_27%3AU+Satyanarayana&s=books&sr=1-1
Pentose phosphate pathway is an alternative pathway to glycolysis and TCA cycle for oxidation of glucose. It is a shunt of glycolysis. It is also known as hexose monophosphate (HMP) shunt or phosphogluconate pathway. It occurs in cytoplasm of both prokaryotes and eukaryotes. While it involves oxidation of glucose, its primary role is anabolic rather than catabolic. It is an important pathway that generates precursors for nucleotide synthesis and is especially important in red blood cells (erythrocytes).
Fatty acid oxidation
Types of fatty acid oxidation
Overview of fatty acid oxidation
Beta-Oxidation of fatty acid
Steps in Beta-Oxidation of fatty acid
Stoichiometry of Beta oxidation
Reference
This PPT is on Amino acid metabolism. And the topics covered under this ppt are Transamination, deamination
Book referred: https://www.amazon.in/Biochemistry-2019-Satyanarayana-Satyanarayana-Author/dp/B07WGHCTKZ/ref=sr_1_1?dchild=1&qid=1591608419&refinements=p_27%3AU+Satyanarayana&s=books&sr=1-1
Digestion of proteins, absorption of amino acids, synthesis of amino acids, catabolism of amino acids and synthesis of specialised non-protein compounds from amino acids for undergraduates
“TCA cycle is the series of chemical reactions used by all aerobic organisms to release stored energy through the oxidation of acetyl CoA derived from carbohydrates, fats, and proteins into ATP.” TCA cycle or Tricarboxylic Cycle is also known as Kreb's Cycle or Citric Acid Cycle.
The citric acid cycle is the central metabolic hub of the cell.
It is the final common pathway for the oxidation of fuel molecule such as amino acids, fatty acids, and carbohydrates.
Digestion of proteins, absorption of amino acids, synthesis of amino acids, catabolism of amino acids and synthesis of specialised non-protein compounds from amino acids for undergraduates
“TCA cycle is the series of chemical reactions used by all aerobic organisms to release stored energy through the oxidation of acetyl CoA derived from carbohydrates, fats, and proteins into ATP.” TCA cycle or Tricarboxylic Cycle is also known as Kreb's Cycle or Citric Acid Cycle.
The citric acid cycle is the central metabolic hub of the cell.
It is the final common pathway for the oxidation of fuel molecule such as amino acids, fatty acids, and carbohydrates.
citric acid cycle or TCA cycle.
krebs cycle is amphibolic in nature and its important reactions.
occurs in mitochondrial matrix in close proximity to ETC.
5 types of vitamins are involved in this cycle. also inhibitors are present . regulation of TCA cycle is governed by mainly 3 enzymes
and there is mention the energies of every step that takes place in citric acid cycle.
citric acid cycle produces 24 molecules of ATP in every cycle
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
We all have good and bad thoughts from time to time and situation to situation. We are bombarded daily with spiraling thoughts(both negative and positive) creating all-consuming feel , making us difficult to manage with associated suffering. Good thoughts are like our Mob Signal (Positive thought) amidst noise(negative thought) in the atmosphere. Negative thoughts like noise outweigh positive thoughts. These thoughts often create unwanted confusion, trouble, stress and frustration in our mind as well as chaos in our physical world. Negative thoughts are also known as “distorted thinking”.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
1. LECTURE NOTES: PHARMACEUTICAL BIOCHEMISTRY
PREPARED BY: DR. USMAN SALEEM 1
Citric Acid Cycle
Over View
Stage III in the oxidation of fuel molecules begins when the two-carbon acetyl units (of acetyl
CoA) enter the citric acid cycle. This process is called the citric acid cycle because one of the key
intermediates is citric acid. However, it is also called the tricarboxylic acid cycle (TCA) in reference
to the three carboxylic acid groups in citric acid, and the Krebs cycle in honor of Sir Hans A. Krebs,
who deduced its reaction sequence in 1937.
Functions of Citric Acid Cycle
1. The citric acid cycle is the principal process for generating the reduced coenzymes NADH and
FADH2, which are necessary for the reduction of oxygen and ATP synthesis in the electron
transport chain.
2. Another important function of the citric acid cycle as a source of intermediates for
biosynthesis of
Fatty acids
Heme
Nonessential amino acids (Glutamate and Aspartate)
Steroids
2. LECTURE NOTES: PHARMACEUTICAL BIOCHEMISTRY
PREPARED BY: DR. USMAN SALEEM 2
Location of the Citric Acid Cycle
The citric acid cycle takes place in the mitochondrial matrix, with exception that one enzyme
(succinate dehydrogenase) is located in the inner mitochondrial membrane.
Reactions of Citric Acid Cycle
The citric acid cycle is shown in schematic form in following figure.
3. LECTURE NOTES: PHARMACEUTICAL BIOCHEMISTRY
PREPARED BY: DR. USMAN SALEEM 3
The citric acid cycle has eight steps, each catalyzed by a different enzyme. Four of the eight
steps—Steps 3, 4, 6, and 8—are oxidation reactions. The oxidizing agent is NAD+ in all except Step
6, in which FAD plays the same role. In Step 5, a molecule of GDP (guanosine diphosphate) is
phosphorylated to produce GTP. This reaction is equivalent to the production of ATP because the
phosphate group is easily transferred to ADP, producing GDP and ATP.
Net Reaction
The individual reactions of the cycle can be added to give an overall net equation:
Important Features of Citric Acid Cycle
Some important features of the citric acid cycle are the following:
1. Acetyl CoA, available from the breakdown of carbohydrates, lipids, and amino acids, is the
fuel of the citric acid cycle.
2. The operation of the cycle requires a supply of the oxidizing agents NAD+
and FAD.
3. The cycle is dependent on reactions of the electron transport chain to supply the necessary
NAD+
and FAD. Because oxygen is the final acceptor of electrons in the electron transport
chain, the continued operation of the citric acid cycle depends ultimately on an adequate
supply of oxygen.
4. Two carbon atoms enter the cycle as an acetyl unit, and two carbon atoms leave the cycle as
two molecules of CO2.
5. In each complete cycle, four oxidation–reduction reactions produce three molecules of NADH
and one molecule of FADH2.
6. One molecule of the high-energy phosphate compound guanosine triphosphate (GTP) is
generated.
Regulation of the Citric Acid Cycle
The rate at which the citric acid cycle operates is precisely adjusted to meet cellular needs for
ATP. The cycle is regulated at three steps which are catalyzed by:
1. Citrate synthetase (Reaction 1)
2. Isocitrate dehydrogenase (Reaction 3)
3. -ketoglutarate dehydrogenase complex (Reaction 4)
The citrate synthetase is an allosteric enzyme that is inhibited by ATP and NADH and activated
by ADP. When cellular needs for ATP are met, ATP interacts with citrate synthetase and
4. LECTURE NOTES: PHARMACEUTICAL BIOCHEMISTRY
PREPARED BY: DR. USMAN SALEEM 4
reduces its affinity for acetyl CoA. Thus, ATP acts as a modulator (inhibitor) of citrate
synthetase and inhibits the entry of acetyl CoA into the citric acid cycle. Similarly, NADH acts as
an inhibitor and signals the citric acid cycle to slow the production of NADH and FADH2. On the other
hand, when ATP levels are low, ADP levels are usually high. ADP, an activator of citrate
synthetase, stimulates the entry of acetyl CoA into the citric acid cycle and thus boosts the
production of NADH and FADH2.
Isocitrate dehydrogenase, a second controlling enzyme, is an allosteric enzyme that is
activated by ADP and inhibited by NADH in very much the same way as is citrate synthetase.
The third control point is catalyzed by the a-ketoglutarate dehydrogenase complex. This
group of enzymes is inhibited by succinyl CoA and NADH, products of the reaction it catalyzes,
and also by ATP.
These control points are indicated the following figure.
In short, the entry of acetyl CoA into the citric acid cycle and the rate at which the cycle operates
are reduced when cellular ATP levels are high. When ATP supplies are low (and ADP levels are
high), the cycle is stimulated.
5. LECTURE NOTES: PHARMACEUTICAL BIOCHEMISTRY
PREPARED BY: DR. USMAN SALEEM 5
Energetics of Citric Acid Cycle
As a result of oxidation of one molecule of acetyl-CoA to H2O and CO2 by citric acid cycle,
three molecules of NADH and one FADH2 are produced.
Oxidation of 3 NADH by electron transport chain results in the synthesis of 9 ATP, whereas
FADH2 generates 2 ATP molecules.
One molecule of ATP is generated at substrate level during the conversion of succinyl-CoA
to succinate. Thus, a total of 12 ATP are generated from one molecule of acetyl-CoA.
Production of ATP in Citric Acid Cycle
Reaction Comments
Yield of ATP
(Moles)
Isocitrate -ketoglutarate + CO2 2 mol produces 2 NADH* +6
a-ketoglutarate Succinyl CoA + CO2 2 mol produces 2 NADH +6
Succinyl CoA Succinate 2 mol produces 2 GTP +2
Succinate Fumarate 2 mol produces 2 FADH2* +4
Malate Oxaloacetate 2 mol produces 2 NADH +6
Yield of ATP Per Two Molecules of Acetyl-CoA in Citric Acid Cycle: +24
*Oxidation of 1 mole NADH produces 3 moles ATP
*Oxidation of 1 mole FADH2 produces 2 moles ATP
Note: The yield of ATP is 2 moles per molecule of glucose (or two molecules of Acetyl-CoA) as it
passes through Citric acid cycle. The remaining 22 moles of ATP are produced by the reoxidation
of reduced electron carriers (NADH and FADH2) by the electron transport chain.
Summary
The citric acid cycle is amphibolic. It plays a role in both catabolism and anabolism. It is the
central metabolic pathway.
The citric acid cycle is exergonic in terms of overall free-energy changes. In addition, it
produces three NADH and one FADH2 for each Acetyl-CoA that enters the cycle.
NADH and FADH2 generated by the citric acid cycle ultimately pass their electrons to oxygen.
Control of the citric acid cycle is exercised at three points.