ATP Structure and Energy

oh you all are aware about adenosine

triphosphate or simply ATP molecule when

we are dealing with the biochemical

reactions we always lay on this molecule

for the purpose of energy as it's also

called the energy currency of the cell

so here in this video we'll be

discussing its structure first then we

will try to understand why and how the

ATP gives out the energy in biochemical

reactions as I have already determined

this molecule as the energy currency of

the cell so all the reactions in our

body relay on this molecule in order to

drive the reactions first of all let's

see the structure of ATP molecule when

we draw the structure of ATP molecule we

have nucleoside part first

that's adenine nitrogenous base plus

ribose sugar so this problem is the

nucleoside part then to this nucleoside

part at tri prosperities attached' 3

phosphates in a linear fashion and Pinal

result comes out to be nucleotide that's

nucleoside bound to phosphates so ATP

molecule is basically the nucleotide

molecule to distinguish between

nucleoside and nucleotide have a look at

this diagram nucleoside is a combination

of nitrogenous base plus ribose sugar

while as the nucleotide is the

combination of nitrogenous base plus

ribose sugar plus phosphates attached to

the molecule so this is the molecular

structure of ADP molecule plus we're

also differentiated the nucleoside with

nucleotide now let's see where from the

ATP molecule release energy and how it

releases energy in the biochemical

reactions first of all keep this thing

in mind it's not the whole ATP molecule

which gives of the energy but it's

actually the bonds that releases the

energy where we see the structure of ATP

molecule we have got 3 phosphates

attached to the nucleoside and there are

three possible energized bonds between

these molecules but the phosphoanhydride

bonds between beta and gamma phosphate

delivers the energy reactions these

phosphoanhydride bonds are very high

energy bonds and it's when the world

from all

and hydrolyze the terminal phosphate the

bond is broken and we get the energy

poor cellular processes so it is the ATP

hydrolysis that gives the total energy

in that direction we get inorganic

phosphate also plus ADP molecule along

with the energy released from the bond

in the hydrolysis reaction the ATP is

hydrolyzed by water molecule and in this

reaction we get the products in the form

of ADP plus we get terminal phosphate in

the form of inorganic phosphate and also

we get the energy and this energy comes

from the bone which is broken between

oxygen and phosphate that's possible and

right born if we go further ATP molecule

is further hydrolyzed spotted second

prospect releasing the energy again we

get the EMP that time that's ad nauseum

mono phosphate as its beta and gamma

prospects have been removed now getting

back to the frustration we see in this

reaction the ADP plus inorganic

phosphate recycles back to ATP in the

ADP ATP cycle which we have already

discussed the ATP adp cycle the link

slides in for that video it must be

noted that hydrolysis of phosphate

groups in ATP's especially exergonic

process because the resulting ortho

phosphate group is correctly stabilized

by multiple resonance structures making

the products ADP and inorganic phosphate

much lower in energy than the reactants

while making up ATP molecule from ADP

plus inorganic phosphate that emits

endergonic reaction but at the end we

get the total energy gain because the

energy needed to break the bone in ATP

is always lesser than the energy

released by the molecule and also

remember this ATP molecule is not a

stable molecule and it always tends to

kick off the terminal phosphate the high

negative charge density associated with

three adjacent phosphate units of ATP

also dis stabilizes their molecule

making it higher in energy hydrolysis

relieves some of these electrostatic


liberating useful energy in the process

by causing conformational changes in a

teepee structure

and that's why 80 people to lose

terminal prospect on hydrolysis easily

so this is all about the structure of

ATP molecule and how it leads energy and

why it needs energy I hope you like the

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