[ppt]rantai respirasikimia.fmipa.unpatti.ac.id/.../2018/03/rantai-respirasi.pptx · web...
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![Page 1: [PPT]Rantai respirasikimia.fmipa.unpatti.ac.id/.../2018/03/Rantai-respirasi.pptx · Web viewtergantung organ yang melakukan glikolisis KI3261 Zeily Nurachman Inhibisi dan uncoupling](https://reader036.vdocuments.net/reader036/viewer/2022062505/5c88542b09d3f291748ca634/html5/thumbnails/1.jpg)
KI3261 Zeily Nurachman 1
Rantai respirasi
KI3261 Zeily Nurachman
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KI3261 Zeily Nurachman 2
Rantai respirasi• Istilah lain: fosforilasi oksidatif• Proses pembentukan ATP dari hasil
transfer elektron dari NADH/FADH2 ke O2 melalui rangkaian reaksi transfer elektron
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KI3261 Zeily Nurachman 3
Fosforilasi oksidatif
• Reaksi redoks (reduksi-oksidasi)• Terjadi di membran-dalam mitokhondria• Aliran elektron: dari NADH/FADH2 ke O2
• Mengakibatkan pompa proton ke luar matrik
• Ada gradien pH dan potensial listrik transmembran
• ATP dibentuk dari aliran proton balik
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KI3261 Zeily Nurachman 4
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KI3261 Zeily Nurachman 5
Aliran elektron
II
IV
III
I
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KI3261 Zeily Nurachman 6
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KI3261 Zeily Nurachman 7
Rantai transpor elektron
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KI3261 Zeily Nurachman 8
Kompleks I4 proton dipompa ke luar
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KI3261 Zeily Nurachman 9
Tidak ada proton dipompa
Kompleks II
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KI3261 Zeily Nurachman 10
Kompleks III4 proton dipompa ke luar
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KI3261 Zeily Nurachman 11
Siklus Q pada kompleks III
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KI3261 Zeily Nurachman 12
Kompleks IV2 proton dipompa ke luar
½O2 = 2 proton dipompa
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KI3261 Zeily Nurachman 13
NADH + 11H+(N) + ½O2 → NAD+ + 10H+
(P) + H2O
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KI3261 Zeily Nurachman 14
KemiosmotikMCB 1602
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KI3261 Zeily Nurachman 15
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KI3261 Zeily Nurachman 16
ATP sintase
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KI3261 Zeily Nurachman 17
Subunit F1
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KI3261 Zeily Nurachman 18
1 ATP perlu10/3 = 3,33 proton
≈ 4 proton
Subunit F0
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KI3261 Zeily Nurachman 19
Model sintesis ATP
O (open, konformasi buka)L (loose, konformasi longgar)T (tight, konformasi ketat)
MCB 1603
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KI3261 Zeily Nurachman 20
Rasio P/O atau rasio P/2e-
(perbandingan ATP terhadap ½O2)
• 1 NADH → 10 proton dipompa = 10/4 ATP (rasio P/O = 2,5)
• 1 FADH2 → 6 proton dipompa = 6/4 ATP (rasio P/O = 1,5)
Jadi 1 mol NADH = 2,5 mol ATP1 mol FADH2 = 1,5 mol ATP
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KI3261 Zeily Nurachman 21
Transpor ATP tidak butuh energi
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KI3261 Zeily Nurachman 22
Sistem pengantaran NADH
di hati, ginjal, dan jantung
1 mol NADH (sitosol) = 2,5 mol ATP
Sistem malat-aspartat
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KI3261 Zeily Nurachman 23
Sistem pengantaran NADHdi otot rangka dan otakSistem gliserol-3-fosfat
1 mol NADH (sitosol) = 1,5 mol ATP
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KI3261 Zeily Nurachman 24
Contoh perhitungan ATP
1 mol asam palmitat jika dibakar sempurna akan menghasilkan 106 mol ATP
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KI3261 Zeily Nurachman 25
Contoh perhitungan ATP
1 mol glukosa jika dibakar sempurna akan menghasilkan 30 atau 32 mol ATPtergantung organ yang melakukan glikolisis
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KI3261 Zeily Nurachman 26
Inhibisi dan uncoupling
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KI3261 Zeily Nurachman 27
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KI3261 Zeily Nurachman 28
Pengendalian jalur produksi ATP