Electron Transport System

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Complex	EC	Enzyme	Substrates		Products
Complex	EC	Enzyme	Electron donor	Electron acceptor	Oxidized	Reduced
I	1.6.5.3	NADH dehydrogenase (ubiquinone)	NADH	Ubiquinone	NAD+	Ubiquinol
II	1.3.5.1	Succinate dehydrogenase (ubiquinone)	Succinate	Ubiquinone	Fumarate	Ubiquinol
III	1.10.2.2	Ubiquinol--cytochrome c reductase	Ubiquinol	Ferricytochrome c	Ubiquinone	Ferrocytochrome c
IV	1.9.3.1	Cytochrome c oxidase	Ferrocytochrome c	O2	Ferricytochrome c	H2O

NADH dehydrogenase (Complex I) [EC:1.6.5.3] and similar enzymes

organism A B C D E F G H I J K L M N
eco [ P | G | T ] b2288(nuoA) b2287(nuoB) b2286 b2285(nuoE) b2284(nuoF) b2283(nuoG) b2282(nuoH) b2281(nuoI) b2280(nuoJ) b2279(nuoK) b2278(nuoL) b2277(nuoM) b2276(nuoN)
hpy [ P | G | T ] HP1260 HP1261 HP1262 HP1263 HP1264 HP1265 HP1266 HP1267 HP1268 HP1269 HP1270 HP1271 HP1272 HP1273
rpr [ P | G | T ] RP357 RP356 RP355 RP354 RP353 RP115 RP797 RP796 RP795 RP790 RP791 RP792 RP793 RP537
mtu [ P | G | T ] Rv3145 Rv3146 Rv3147 Rv3148 Rv3149 Rv3150 Rv3151 Rv3152 Rv3153 Rv3154 Rv3155 Rv3156 Rv3157 Rv3158
syn [ P | G | T ] slr1279 slr1280 slr1281 slr0261 sll1220 sll1221 sll1223 sll0519 sll0520 sll0521 sll0522 slr0844
sll0026
sll1732 slr0331
slr1291
sll0027
sll1733 sll0223
aae [ P | G | T ] aq_1310
aq_1385 aq_1312 aq_1314 aq_574 aq_573 aq_437 aq_1315
aq_1373
aq_1374 aq_1317
aq_1375 aq_1318
aq_1377 aq_1319
aq_1378 aq_1320
aq_1379 aq_1321
aq_1382 aq_1322
aq_1383
bsu [ P | G | T ] ndhF yufD
eco [ P | G | T ] b2489(hyfI) b2487(hyfG) b2483(hyfC) b2481(hyfA)
b2488(hyfH) b2485(hyfE) b2482(hyfB)
b2484(hyfD)
b2486(hyfF)
eco [ P | G | T ] b2719(hycG) b2721(hycE) b2722(hycD) b2724(hycB)
b2720(hycF) b2723(hycC)
mtu [ P | G | T ] Rv0082 Rv0087 Rv0084 Rv0085 Rv0086
mja [ P | G | T ] MJ0516 MJ0515 MJ0514 MJ0520 MJ0514.1
MJ0514.2 MJ1310 MJ1309
mth [ P | G | T ] MTH397
MTH1239 MTH398
MTH1238 MTH1548 MTH1549 MTH393
MTH1237 MTH399
MTH401
MTH1240 MTH1247 MTH391
MTH1246
afu [ P | G | T ] AF1829 AF1830 AF1831 AF1823 AF1824 AF1826 AF1825 AF1827
pho [ P | G | T ] PH1434 PH1435
PH1448 PH1437
PH1447 PH1439
PH1450 PH1440
PH1446 PH1430
PH1453 PH1431
PH1452

organism	A	B	C	D	E	F	G	H	I	J	K	L	M	N
eco [ P \| G \| T ]	b2288(nuoA)	b2287(nuoB)	b2286	b2285(nuoE)	b2284(nuoF)	b2283(nuoG)	b2282(nuoH)	b2281(nuoI)	b2280(nuoJ)	b2279(nuoK)	b2278(nuoL)	b2277(nuoM)	b2276(nuoN)
hpy [ P \| G \| T ]	HP1260	HP1261	HP1262	HP1263	HP1264	HP1265	HP1266	HP1267	HP1268	HP1269	HP1270	HP1271	HP1272	HP1273
rpr [ P \| G \| T ]	RP357	RP356	RP355	RP354	RP353	RP115	RP797	RP796	RP795	RP790	RP791	RP792	RP793	RP537
mtu [ P \| G \| T ]	Rv3145	Rv3146	Rv3147	Rv3148	Rv3149	Rv3150	Rv3151	Rv3152	Rv3153	Rv3154	Rv3155	Rv3156	Rv3157	Rv3158
syn [ P \| G \| T ]	slr1279	slr1280	slr1281	slr0261	sll1220	sll1221	sll1223	sll0519	sll0520	sll0521	sll0522	slr0844 sll0026 sll1732	slr0331 slr1291 sll0027 sll1733	sll0223
aae [ P \| G \| T ]	aq_1310 aq_1385	aq_1312	aq_1314	aq_574	aq_573	aq_437	aq_1315 aq_1373 aq_1374	aq_1317 aq_1375	aq_1318 aq_1377	aq_1319 aq_1378	aq_1320 aq_1379	aq_1321 aq_1382	aq_1322 aq_1383
bsu [ P \| G \| T ]												ndhF	yufD
eco [ P \| G \| T ]		b2489(hyfI)	b2487(hyfG)				b2483(hyfC)	b2481(hyfA) b2488(hyfH)	b2485(hyfE)	b2482(hyfB) b2484(hyfD) b2486(hyfF)
eco [ P \| G \| T ]		b2719(hycG)	b2721(hycE)				b2722(hycD)	b2724(hycB) b2720(hycF)		b2723(hycC)
mtu [ P \| G \| T ]		Rv0082		Rv0087				Rv0084			Rv0085			Rv0086
mja [ P \| G \| T ]		MJ0516		MJ0515		MJ0514		MJ0520	MJ0514.1 MJ0514.2		MJ1310			MJ1309
mth [ P \| G \| T ]		MTH397 MTH1239		MTH398 MTH1238	MTH1548	MTH1549		MTH393 MTH1237	MTH399 MTH401 MTH1240		MTH1247			MTH391 MTH1246
afu [ P \| G \| T ]		AF1829	AF1830				AF1831		AF1823	AF1824	AF1826	AF1825	AF1827
pho [ P \| G \| T ]		PH1434	PH1435 PH1448	PH1437 PH1447				PH1439 PH1450	PH1440 PH1446		PH1430 PH1453			PH1431 PH1452

Succinate dehydrogenase (Complex II) [EC:1.3.5.1] and similar enzymes

Fumarate reductase (E. coli)
[PDB:1FUM]
[RasMol:1FUM]

organism C D A B C D
eco [ P | G | T ] b0721(sdhC) b0722(sdhD) b0723(sdhA) b0724(sdhB)
eco [ P | G | T ] b4154(frdA) b4153(frdB) b4152(frdC) b4141(frdD)
hin [ P | G | T ] HI0835 HI0834 HI0833 HI0832
hpy [ P | G | T ] HP0192 HP0191
hpj [ P | G | T ] jhp0178 jhp0177
rpr [ P | G | T ] RP126 RP127 RP128 RP044
bsu [ P | G | T ] sdhC sdhA sdhB
mtu [ P | G | T ] Rv3316 Rv3317 Rv3318 Rv3319
mtu [ P | G | T ] Rv1552 Rv1553 Rv1554 Rv1555
mtu [ P | G | T ] Rv0248c Rv0247c
ctr [ P | G | T ] CT593 CT592 CT591
cpn [ P | G | T ] CPn0788 CPn0789 CPn0790
syn [ P | G | T ] slr1233 sll1625
sll0823
aae [ P | G | T ] aq_594 aq_655
aq_553
mja [ P | G | T ] MJ0033 MJ0092
mth [ P | G | T ] MTH1502 MTH1850
afu [ P | G | T ] AF0683 AF0684 AF0681 AF0682
ape [ P | G | T ] APE0950 APE0946
sce [ P | G | T ] SDH3 SDH4 SDH1
YJL045W SDH2
cel [ P | G | T ] T07C4.7 C34B2.7 F42A8.2
hsa [ P | G | T ] SDH2 SDH1

organism	C	D	A	B	C	D
eco [ P \| G \| T ]	b0721(sdhC)	b0722(sdhD)	b0723(sdhA)	b0724(sdhB)
eco [ P \| G \| T ]			b4154(frdA)	b4153(frdB)	b4152(frdC)	b4141(frdD)
hin [ P \| G \| T ]			HI0835	HI0834	HI0833	HI0832
hpy [ P \| G \| T ]			HP0192	HP0191
hpj [ P \| G \| T ]			jhp0178	jhp0177
rpr [ P \| G \| T ]	RP126	RP127	RP128	RP044
bsu [ P \| G \| T ]	sdhC		sdhA	sdhB
mtu [ P \| G \| T ]	Rv3316	Rv3317	Rv3318	Rv3319
mtu [ P \| G \| T ]			Rv1552	Rv1553	Rv1554	Rv1555
mtu [ P \| G \| T ]			Rv0248c	Rv0247c
ctr [ P \| G \| T ]	CT593		CT592	CT591
cpn [ P \| G \| T ]	CPn0788		CPn0789	CPn0790
syn [ P \| G \| T ]			slr1233	sll1625 sll0823
aae [ P \| G \| T ]			aq_594	aq_655 aq_553
mja [ P \| G \| T ]			MJ0033	MJ0092
mth [ P \| G \| T ]			MTH1502	MTH1850
afu [ P \| G \| T ]	AF0683	AF0684	AF0681	AF0682
ape [ P \| G \| T ]			APE0950	APE0946
sce [ P \| G \| T ]	SDH3	SDH4	SDH1 YJL045W	SDH2
cel [ P \| G \| T ]	T07C4.7		C34B2.7	F42A8.2
hsa [ P \| G \| T ]			SDH2	SDH1

Cytochrome c reductase (Complex III) [EC:1.10.2.2]

Cytochrome bc1 complex (bovine)
[PDB:1BGY]
[RasMol:1BGY]

organism ISP Cyt b Cyt c1 Core1 Core2 6 7 8 9 10
hpy [ P | G | T ] HP1540 HP1539
hpj [ P | G | T ] jhp1459 jhp1460 jhp1461
rpr [ P | G | T ] RP270 RP271 RP272
syn [ P | G | T ] sll1316
slr1185
slr1182 slr0342 sll1245
aae [ P | G | T ] aq_045 aq_044 aq_042
sce [ P | G | T ] RIP1 CYTB CYT1 COR1 QCR2 QCR6 QCR7 QCR8 QCR9 QCR10
cel [ P | G | T ] F42G8.12 C54G4.8 F56D2.1 T24C4.1 R07E4.3
F45H10.2 F36H12.1
hsa [ P | G | T ] MTCYB CYC1 UQCRC1 UQCRC2 UQCRB

organism	ISP	Cyt b	Cyt c1	Core1	Core2	6	7	8	9	10
hpy [ P \| G \| T ]	HP1540	HP1539
hpj [ P \| G \| T ]	jhp1459	jhp1460	jhp1461
rpr [ P \| G \| T ]	RP270	RP271	RP272
syn [ P \| G \| T ]	sll1316 slr1185 slr1182	slr0342	sll1245
aae [ P \| G \| T ]	aq_045	aq_044	aq_042
sce [ P \| G \| T ]	RIP1	CYTB	CYT1	COR1	QCR2	QCR6	QCR7	QCR8	QCR9	QCR10
cel [ P \| G \| T ]	F42G8.12		C54G4.8	F56D2.1	T24C4.1		R07E4.3 F45H10.2			F36H12.1
hsa [ P \| G \| T ]		MTCYB	CYC1	UQCRC1	UQCRC2		UQCRB

Cytochrome c oxidase (Complex IV) [EC:1.9.3.1]
Cytochrome bo complex [EC:1.10.3.-]

Cytochrome c oxidase (bovine)
[PDB:1OCC]
[RasMol:1OCC]

Organism III I II IV V VI VII VIII Assembly factor
eco [ P | G | T ] b0428(cyoE) b0429(cyoD) b0430(cyoC) b0431(cyoB) b0432(cyoA)
hpy [ P | G | T ] HP0144
rpr [ P | G | T ] RP346 RP191 RP405 RP406 RP257 RP304
bsu [ P | G | T ] ctaB ctaF ctaE ctaD ctaC
bsu [ P | G | T ] yjdK qoxD qoxC qoxB qoxA
mtu [ P | G | T ] Rv1451 RV2193 RV3043C RV2200c
syn [ P | G | T ] sll1899 slr1138
slr2083 slr1137
slr2082 slr1136
sll0813
aae [ P | G | T ] aq_154 aq_2188 aq_2191
aq_2192 aq_2190
aq_2191a
afu [ P | G | T ] AF2036 AF2046 AF0190
AF0142
AF0144
sce [ P | G | T ] COX10 COX1 COX2 COX4 COX5A
COX5B COX6
COX13
COX12 COX7
COX9 COX8 COX15 COX11
cel [ P | G | T ] F54D8.2 ZC455.11

Organism			III	I	II	IV	V	VI	VII	VIII	Assembly factor
eco [ P \| G \| T ]	b0428(cyoE)	b0429(cyoD)	b0430(cyoC)	b0431(cyoB)	b0432(cyoA)
hpy [ P \| G \| T ]				HP0144
rpr [ P \| G \| T ]	RP346		RP191	RP405	RP406						RP257	RP304
bsu [ P \| G \| T ]	ctaB	ctaF	ctaE	ctaD	ctaC
bsu [ P \| G \| T ]	yjdK	qoxD	qoxC	qoxB	qoxA
mtu [ P \| G \| T ]	Rv1451		RV2193	RV3043C	RV2200c
syn [ P \| G \| T ]	sll1899		slr1138 slr2083	slr1137 slr2082	slr1136 sll0813
aae [ P \| G \| T ]	aq_154		aq_2188	aq_2191 aq_2192	aq_2190 aq_2191a
afu [ P \| G \| T ]	AF2036			AF2046	AF0190 AF0142 AF0144
sce [ P \| G \| T ]	COX10			COX1	COX2	COX4	COX5A COX5B	COX6 COX13 COX12	COX7 COX9	COX8	COX15	COX11
cel [ P \| G \| T ]								F54D8.2			ZC455.11

Cytochrome bd complex [EC:1.10.3.-]

Organism I II
eco [ P | G | T ] b0733(cydA) b0734(cydB)
eco [ P | G | T ] b0978(appC) b0979(appB)
hin [ P | G | T ] HI1076 HI1075
rpr [ P | G | T ] RP216 RP217
bsu [ P | G | T ] cydA
ythA cydB
mtu [ P | G | T ] Rv1623c Rv1622c
ctr [ P | G | T ] CT013 CT014
cpn [ P | G | T ] CPn0102 CPn0103
syn [ P | G | T ] slr1379 slr1380
aae [ P | G | T ] aq_1357 aq_1358
afu [ P | G | T ] AF2296
AF2297

Organism	I	II
eco [ P \| G \| T ]	b0733(cydA)	b0734(cydB)
eco [ P \| G \| T ]	b0978(appC)	b0979(appB)
hin [ P \| G \| T ]	HI1076	HI1075
rpr [ P \| G \| T ]	RP216	RP217
bsu [ P \| G \| T ]	cydA ythA	cydB
mtu [ P \| G \| T ]	Rv1623c	Rv1622c
ctr [ P \| G \| T ]	CT013	CT014
cpn [ P \| G \| T ]	CPn0102	CPn0103
syn [ P \| G \| T ]	slr1379	slr1380
aae [ P \| G \| T ]	aq_1357	aq_1358
afu [ P \| G \| T ]	AF2296 AF2297