pendahuluan metabolisme protein ok
TRANSCRIPT
-
7/25/2019 Pendahuluan Metabolisme Protein OK
1/29
METABOLISMEPROTEIN
FERY INDRADEWI
-
7/25/2019 Pendahuluan Metabolisme Protein OK
2/29
Penggolongan Protein
Protein Fibrous (Serat)Protein ang ti!a" larut !ala#
air$Misal % "eratin& "olagen& sutra
Protein 'lobularProtein ang larut !ala# air$Misal % eni#& or#on&e#oglobin& #ioglobin&
o*albu#in (+a!a +uti telur)
-
7/25/2019 Pendahuluan Metabolisme Protein OK
3/29
Stru"tur Protein
Stru"tur +ri#er +rotein, Rantai peptida yang dihubungkan
oleh ikatan peptida
N C C
O
H
RH
N C C
O
H
RH
N C C
O
H
RH
N C C
O
H
RH
-
7/25/2019 Pendahuluan Metabolisme Protein OK
4/29
Stru"tur Protein
Stru"tur se"un!er +rotein:(a) -Helix; (b) -sheet
-
7/25/2019 Pendahuluan Metabolisme Protein OK
5/29
u"tur +rotein serat % -./eli0
-
7/25/2019 Pendahuluan Metabolisme Protein OK
6/29
I"atan ang ber+eran +a!a+e#bentu"an
stru"tur tersier
-
7/25/2019 Pendahuluan Metabolisme Protein OK
7/29
FUNG! "R#$%!N :
Pe#bentu"an 1aringan baru se+erti%ra#but& "u"u$
Mengganti 1aringan ang rusa" se+erti%+engelu+asan #u"osa usus$
Mengganti asa# a#ino ang ilang#isalna le2at urin$
Mensintesis asa# a#ino nonesensial
!engan #enggabung"an asa# "eto #elalui+roses transa#inasi ole ati$
Mensintesis #ole"ul 3ungsional se+erti4or#on& eni# !sb$
-
7/25/2019 Pendahuluan Metabolisme Protein OK
8/29
Meli+uti%
Degra!asi +rotein (#a"anan!an +rotein intraseluler)#en1a!i asa# a#ino
O"si!asi asa# a#ino
Biosintesis asa# a#inoBiosintesis +rotein
Metabolis#e +rotein
-
7/25/2019 Pendahuluan Metabolisme Protein OK
9/29
DE'RADASI PROTEIN
& "%N'%RNN "R#$%!Neg*adasi p*otein d* +akanan asa+ a+ino(di salu*an pen,e*naan)
"*otein diabso*psi di usus halus dala+ bentuk
asa+ a+ino +asuk da*ahala+ da*ah asa+ a+ino diseba* ke selu*uhsel untuk disi+pan
i dala+ sel asa+ a+ino disi+pan dala+
bentuk p*otein (dengan +enggunakan en.i+)
Hati +e*upakan /a*ingan uta+a untuk+enyi+pan dan +engolah p*otein
-
7/25/2019 Pendahuluan Metabolisme Protein OK
10/29
-
7/25/2019 Pendahuluan Metabolisme Protein OK
11/29
Isi la#bung #asu" !ala#!uo!enu#
Se"resi +an"reas !an e#+e!u#enguba +/ #en1a!i al"ali
'eta +an"reas ang#engan!ung eni# tri+sin !an
"i#otri+sin +oli+e+ti!a
Pen6ernaan Protein
-
7/25/2019 Pendahuluan Metabolisme Protein OK
12/29
'eta +an"reas 1uga #engan!ungeni# +e+ti!ase
7arbo"si+e+ti!ase
#engi!rolisis i"atan +e+ti!ater#inal +a!a u1ung "arbo"silrantai +oli+e+ti!a
A#ino+e+ti!ase !an Di+e+ti!ase
#e#e6a i"atan +e+ti!ater#inal +a!a u1ung a#inobebas rantai +oli+e+ti!a
Pen6ernaan Protein
-
7/25/2019 Pendahuluan Metabolisme Protein OK
13/29
Isi !uo!enu#'eta usus ang !ise"resi ole
"elen1ar Brunner !an Lieber"un1uga #engan!ung eni#
a#ino+e+ti!ase !an !i+e+ti!ase
Proses i!rolisis +e+ti!a asa#a#ino
Pen6ernaan Protein
-
7/25/2019 Pendahuluan Metabolisme Protein OK
14/29
Asa# a#ino !i absorbsi ole
#u"osa usus alus
Asa# a#ino #asu" "e !ala#
sir"ulasi !ara
Pen6ernaan Protein
-
7/25/2019 Pendahuluan Metabolisme Protein OK
15/29
O*er*ie2 o3 a#ino a6i!s#etabolis#%a) +ino a,ids se*0e as subst*ates 1o* the
synthesis o1 p*otein2b) +ino a,ids p*o0ide nit*ogen 1o* the synthesiso1 othe* nit*ogen ,ontaining ,o+pounds2,) +ino a,ids a*e ,ataboli.ed as 1uels3
5lassi86ation o3 a#ino a6i!s%9$ 5e#i6al 6lassi86ation$a3 ,,o*ding to the 6e#istr o3 te si!e6ains$b3 ,,o*ding to
+olarit o3 si!e 6ains$:$ Nutritional 6lassi86ation %4 %ssential4 Non-essential;$ Metaboli6 6lassi86ation %
4 Glu,ogeni,2
-
7/25/2019 Pendahuluan Metabolisme Protein OK
16/29
-
7/25/2019 Pendahuluan Metabolisme Protein OK
17/29
Asa#.asa# a#ino 1uga #ene!ia"an"ebutuan nitrogen untu"%
Stru"tur basa nitrogen DNA !an RNA
/e#e !an stru"tur lain ang seru+ase+erti #ioglobin& e#oglobin&sito"ro#& eni# !ll$
Asetil"olin !an neurotrans#itterlainna$
/or#on !an 3os3oli+i!
-
7/25/2019 Pendahuluan Metabolisme Protein OK
18/29
Stru"tur Asa# A#ino
-
7/25/2019 Pendahuluan Metabolisme Protein OK
19/29
Asa# a#ino
Asa# a#ino glu"ogeni"
7e+iliki ke+a+puan +e+bentukglukosa da*i glukoneogenesis
Asa# a#ino "etogeni"
$idak +e+iliki ke+a+puan+e+bentuk glukosa3 6e*guna untuk
ketogenesis dan sintesis lipid
Asa# a#ino glu"ogeni" !an"etogeni"
-
7/25/2019 Pendahuluan Metabolisme Protein OK
20/29
Essential an! nonessentiala#ino a6i!s
'lu6ogeni6 an! "etogeni6
a#ino a6i!s
AA Esensial AA Non Esensial
Arginine/isti!ine
Isoleu6ineLeu6ineLsineMetioninePenlalanineTreonineTr+to+an?aline
AlanineAs+artate
As+aragine5steine'luta#ate'luta#ine'l6ineProlineSerineTrosine
'lu6ogeni6 Bot 'lu6ogeni6 an!"etogeni6
7etogeni6
AlanineAs+aragine5steine'luta#ine/isti!ine Proline
TreonineAs+artate
Isoleu6inePenlalanineTr+to+anTrosine
Leu6ineLsine
-
7/25/2019 Pendahuluan Metabolisme Protein OK
21/29
'li"olisis
De"arbo"silasio"si!ati3
Daur 7reb@s
Sintesis asa# a#ino
!3 $H% N!$R#G%N !N 7!N# '!2 "UR!N%2"8R!7!!N% N #$H%R 6!#7#9%'U9%LTIMATELY 5OMES FROM ATMOSP/ERI5 N:$!!3 $H! "R#'% 6%G!N !$H $H% R%U'$!#N #FN $# NH3 7!N# '! R% 7% FR#7 7%$6#9!$% #F$H% 7?#R 7%$6#9!' "$H83
-
7/25/2019 Pendahuluan Metabolisme Protein OK
22/29
-
7/25/2019 Pendahuluan Metabolisme Protein OK
23/29
Pele+asan gugus a#in
Transa#inasi
!nte*aksi dua +olekul (a+ino a,id dan keto
a,id)'th3 +ino g*oup da*i gluta+at dipindahkanke keto a,id a+ino a,id @ -ketogluta*at
Dea#inasi o"si!ati3
"elepasan a+ino g*oup da*i suatu +olekul2dengan bantuan en.i+ dea+inase
'th3 Hid*olisis spontan ,ytosine u*a,il @a++onia
7atabolis#e asa# a#ino
-
7/25/2019 Pendahuluan Metabolisme Protein OK
24/29
-
7/25/2019 Pendahuluan Metabolisme Protein OK
25/29
Calur #etaboli" uta#aasa# a#ino
!3 pe*ta+a2 p*oduksi asa+ a+ino da*ipe+bongka*an p*otein tubuh2 digestip*otein diet se*ta sintesis asa+ a+ino di
hati3!!3 penga+bilan nit*ogen da*i asa+ a+ino3
!!!3 katabolis+e asa+ a+ino +en/adi ene*gi+elalui siklus asa+ se*ta siklus u*ea
sebagai p*oses pengolahan hasilsa+pingan pe+e,ahan asa+ a+ino3
!>3 sintesis p*otein da*i asa+-asa+ a+ino3
-
7/25/2019 Pendahuluan Metabolisme Protein OK
26/29
-
7/25/2019 Pendahuluan Metabolisme Protein OK
27/29
-
7/25/2019 Pendahuluan Metabolisme Protein OK
28/29
Su##ar
-
7/25/2019 Pendahuluan Metabolisme Protein OK
29/29