Superfamily » 1.1.05. Electron transport chain complex II superfamily (6 families) <a href="http://www.tcdb.org/search/result.php?tc=5.A.3" class="external" target="_blank">5.A.3 (TCDB)</a> <a href="http://pfam.sanger.ac.uk/clan/CL0328" class="external" target="_blank">CL0328</a>, <a href="http://www.ebi.ac.uk/thornton-srv/databases/cgi-bin/pdbsum/GetPfamStr.pl?pfam_id=CL0328" class="external" target="_blank">PDBsum</a> - Orientations of Proteins in Membranes (OPM) database

Type:1. Transmembrane (3 classes)
Class:1.1. Alpha-helical polytopic (72 superfamilies)
Superfamily:1.1.05. Electron transport chain complex II superfamily (6 families) 5.A.3 (TCDB) CL0328, PDBsum
Family:
1. 1.1.05.02.
  Formate dehydrogenase 5.A.3 (TCDB) PF00033, PDBsum
  Formate dehydrogenase
  
  Escherichia coli
  (1kqf, 1kqg)
2. 1.1.05.03.
  Respiratory nitrate reductase 5.A.3 (TCDB) PF02665, PDBsum
  Respiratory Nitrate Reductase
  
  Escherichia coli
  (1q16, 1siw, 1y4z, 1y5i, 1y5l, 1y5n, 3egw, 3ir5, 3ir6, 3ir7)
3. 1.1.05.04.
  Fumarate reductase/mitochondrial respiratory complex (II) PF01127, PDBsum
  Fumarate reductase
  
  Wolinella succinogenes
  (2bs2, 1e7p, 1qlb, 2bs3, 2bs4)
  
  Succinate dehydrogenase (mitochondrial respiratory complex II)
  
  Sus scrofa
  (1zoy, 1zp0, 3abv, 3ae1, 3ae2, 3ae3, 3ae4, 3ae5, 3ae6, 3ae7, 3ae8, 3ae9, 3aea, 3aeb, 3aec, 3aed, 3aee, 3aef, 3aeg, 3sfd, 3sfe)
  
  Gallus gallus
  (1yq3, 1yq4, 2fbw, 2h88, 2h89, 2wqy)
  
  Ascaris suum
  (3vr8, 3vr9, 3vra, 3vrb)
4. 1.1.05.05.
  Succinate dehydrogenase/fumarate reductase PF02300, PDBsum
  Fumarate reductase
  
  Escherichia coli
  (1kf6, 1kfy, 1l0v, 2b76, 3cir, 3p4p, 3p4q, 3p4r, 3p4s)
  
  Succinate dehydrogenase
  
  Escherichia coli
  (1nek, 1nen, 2acz, 2wdq, 2wdr, 2wdv, 2wp9, 2ws3, 2wu2, 2wu5)
5. 1.1.05.01.
  Polysulfide reductase 5.A.3 (TCDB) PF03916, PDBsum
  Polysulfide reductase, inactive state
  
  Thermus thermophilus
  (2vpz, 2vpy)
  
  Polysulfide reductase, substrate-bound state
  
  Thermus thermophilus
  (2vpx, 2vpw)
6. 1.1.05.06.
  Prokaryotic cytochrome b561 PF01292, PDBsum
  Ni/Fe-hydrogenase complex
  
  Escherichia coli
  (4gd3)

1.1.05. Electron transport chain complex II superfamily (6 families) 5.A.3 (TCDB) CL0328, PDBsum (11 proteins)

Family	Protein Name	PDB ID	Species	Localization	Num. Subunits	Num. TM Sec. Structs.	Hydrophobic Thickness or Depth (Å)	Tilt Angle (°)	ΔG_transfer (kcal/mol)
1.1.05.02.	Formate dehydrogenase	1kqf	Escherichia coli	Bact. Gram-neg inner	6	15	33.7 ± 1.1	0 ± 0	-141.9
1.1.05.05.	Succinate dehydrogenase	1nek	Escherichia coli	Bact. Gram-neg inner	6	18	32.0 ± 0.6	0 ± 0	-183.5
1.1.05.06.	Ni/Fe-hydrogenase complex	4gd3	Escherichia coli	Bact. Gram-neg inner	3	6	27.2 ± 1.4	9 ± 1	-42.4
1.1.05.04.	Succinate dehydrogenase (mitochondrial respiratory complex II)	1zoy	Sus scrofa	Mitochon. inner	2	6	29.8 ± 1.1	3 ± 6	-52.6
1.1.05.03.	Respiratory Nitrate Reductase	1q16	Escherichia coli	Bact. Gram-neg inner	2	10	30.1 ± 0.9	0 ± 0	-126.9
1.1.05.04.	Succinate dehydrogenase (mitochondrial respiratory complex II)	1yq3	Gallus gallus	Mitochon. inner	2	6	29.6 ± 1.8	4 ± 6	-56.7
1.1.05.05.	Fumarate reductase	1kf6	Escherichia coli	Bact. Gram-neg inner	2	6	30.2 ± 1.2	14 ± 2	-65.6
1.1.05.04.	Succinate dehydrogenase (mitochondrial respiratory complex II)	3vr8	Ascaris suum	Mitochon. inner	2	6	30.4 ± 1.2	10 ± 1	-57.1
1.1.05.01.	Polysulfide reductase, inactive state	2vpz	Thermus thermophilus	Bact. Gram-neg inner	2	16	29.8 ± 1.5	1 ± 0	-105.2
1.1.05.04.	Fumarate reductase	2bs2	Wolinella succinogenes	Bact. Gram-neg inner	2	10	31.4 ± 1.3	2 ± 0	-118.8
1.1.05.01.	Polysulfide reductase, substrate-bound state	2vpx	Thermus thermophilus	Bact. Gram-neg inner	2	16	27.1 ± 1.1	0 ± 1	-103.3