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Summary Metabolism (WBBY058-05)

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A summary of the treated substance in the lectures on metabolism. All pathways are discussed and then the regulation and distribution of fluxes is discussed.

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Uploaded on
July 12, 2022
File latest updated on
July 12, 2022
Number of pages
11
Written in
2021/2022
Type
Summary

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metabolism

, glycolysis
ATP
glucose

ADP < * exokina.se



glucose b-phosphate

[ Phosphoglucose
isomerase

fructose 6- phosphate
ATP
phosphofructokinase
A-OP (

fructose 1,6 -




bisphosphate


←*
dihydroxyacetone glyceraldehyde
Phosphate C-triose phosphate 3- phosphate

isomerase Pi


Nf glyceraldehyde




}
,

3- phosphate
NA0H 2 dehydrogenase OG
"
= +6,3kt .mu
"




1,3 -

bisphosphoglycer.at *

AOP
however PGK
]↓ phosphoglyceratekina.se
"
* GAOPH has a positive OG , pulls oa
"
≤ -
↳• my .mu
,




""
GAOPH over the barrier by keeping the concentration
<3 -


phosphoglycerate


bisphosphoglyceratelow.t.m.mooeratemu.ae
Of 1,3 -




ax
2- phosphoglycerat.ee

Nolase
H20

phosphoenolpyruvate
"

pyruvate kinase
exergonicrxnr-OGDAT.PL
(strongly
lactate
-
OR
-4in pyruvate
fpyruvateethanol-e-acetal.de
hyde decarboxylase
fatigue
Reaction: glucose +2 NAD
+
T2A-0PT 2 Pi → 2 pyruvate +2 NA0H +2 ATP + ZH0A 2HY

, TCA cycle



NAO't
pyruvate
↳A

pyruvate dehydrogenase
NA0H L
1- CO2

acetyl-CoA C2

citrate synthase
oxaloacetate
NA0H
cu
citrate C6
NA0] / Malate
dehydrogenase aconit
)
1- Malate

(
cu
Aconitatecb




¥
fumarate [Officer can I keep
, getting ≤ex for money)
"
°Ñᵗ
isocitrate C6
Fumarate cu



"° " "



FA0
]
.
dehydrogenase
denytsa%Fe.ru#seNA0+9 NA0H + ≤02

a-
Ketoglutarate C5
a-ketoglutarate
succinate C4 dehydrogenase



µiyg Succinyl
[of + NA☐+

synthetase



µ
"
-
C0A C4 NA0H + ≤02
ATP
COAT OR ADP 1- Pi
GTP OR
GOPTPI




*


{
Reaction acetyl-CoA
& :
:




pyruvate + NA0
"
+
+3 NAD't FAD

C0A →
acetyl-CoA -1
+



NA0H
ADP

1-
+


C02
Pi +21-120 → 2602+3 NADHTFAOHZTATP +24+-1 C0A

, Respiratory chain




1+1+1=7 ttttt
→ cytochrome C →


""" " "" " " "" "
"



""""" "" " " """"""" """"" " "" " " " " "" " " "
" "

I IV
inner membrane ↑
" " " " " " " " "" " " " "
oooooooooeooeoo




%,µt]A_ I AOPTPI
n.
- - - -
-




NA ☐ µ
-
NA0H Ht
FA0+Hᵗ 21-1++1-202
H20

Agp
] ,
↑ ATP synthetase
µ


→ = electron transport



1 NA0H → 2.5 ATP
I FADHZ → 1.5 ATP




Complex I= NA0H -

Q oxidoreductase


complex # = Succinate -

Q reductase


complex # =
Q -




cytochrome C oxidoreductase → transfers electrons from a membrane soluble carrier to
-
a water-soluble
carrier

complex IV =
Cytochrome c. oxidase




?⃝
?⃝

, Summary induced fit enzymes active site closes around substrates → prevents
:
water from entering
↳ hero kinase and hydro liking ATP




Lecture 1 catabolism : fuel → coat Hzot energy
bond energy release
(free energy ) p breaking
=




ATP Anabolism complex molecules
6ibby
carrier of energy e- precursors
:
,
a high energy phosphate
-
bonds .
: →




keq
" =
Gibbs energy of reaction At B. → Cto :
☐ G. =
☐G t RT lnkeq ,


↳ OG =
out p ov -
T0S
entropy
energy temp .




Why is ATP a good carrier ? e. g. .
negative charges on P 's repel each other NA9P converts equilibrium ratio in t
molecules (entropy)
µ
.
2 are formed from 1
-
resonance stabilization Pi
"
1 .
ATP hydrolysis has
s-yimgf-ore.AT P is capable of driving uphill reactions ( OG =
-30.5 KJ /M0W
besides energy & signal transduction
p


ᵈᵈÑ
"
2. ATP is style in absence of enzymes Another role of ATP =
ATP
hydro -




maintaining protein solubility phobia
3 There are processes in the cell with
. an even largernegd-iue-UGtoregenerate.AT P from AOP 3P


Need to know by names of reactions & Which conversions are catalyzed (not the structures)
ribose
:



µ
Glycolysis glucose pyruvate



:





Reaction types : Michaelis Menten kinetics - :




way__
. . . . . .
.. . . . .





Oxidation reduction electron
- :
transfer V = ✓Max '

m '
humax -





Ligation ATP cleavage formation of : covalent bonds if [S ] =
km → V = { Vmax
;µ-
0 Isomerization rearrangement of :
atoms competitive inhibitor : Vmax stays the same .
km ↑



Group transfer : transfer of a functional group from one molecule to another Lineweaver -
Burk plot :
↓ =

¥ᵈa× ^5 '
+

×





Hydrolytic :
cleavage of bonds by the addition of water




Glucose transporters (GLUT ) . . .
: (km tells how much substrate is needed to get to Y2Vma_)

GLUT 1 → all tissues ( basal glucose uptake) km = 1mm



GLUTZ → liver and pancreatic B cells ( liver :
removes excess glucose from the blood Pancreas .
:
role in insulin regulation) km= 15-20 MM



GLUT 3 → all tissues ( basal glucose uptake) km =
1 mm



GLUT 4 → muscle and fat tissues (amount in muscles increases with endurance training ) km 5mm =





GLUT 5 → small intestine ( fructose transporter)

( 6 LU94 is insulin sensitive → insulin
-

promotes uptake of glucose by muscle and fat tissues at high blood glucose levels .
)




^naer_-obic conditions → fermentation : ethanol or lactate Glycolysis in cancer cells :
glycolysis is less efficient


→ increase in glucose uptake

Lecture 2 ( higher rate of glycolysis)

Total amount ATP used : 160g kinase → transfers phosphate from ATP to an acceptor molecule oxidative phosphorylation b

↳ brain uses
120g lyase → carbon bond cleavage

Gluconeogenesis :
synthesis of glucose / reverse of glycolysis

↳ however not all reactions just be reversed this will lead to very positive OG 's of
exlra↓TP&GP_-_

:
can ,
use



investment of 3 ATP per pyruvate
(2×3=6 ATP )
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