2ACZ

Complex II (Succinate Dehydrogenase) From E. Coli with Atpenin A5 inhibitor co-crystallized at the ubiquinone binding site

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: MemProtMD
Membrane Protein Annotation: mpstruc

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d2aczb1	All alpha proteins	Globin-like	alpha-helical ferredoxin	Fumarate reductase/Succinate dehydogenase iron-sulfur protein, C-terminal domain	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
B	d2aczb2	Alpha and beta proteins (a+b)	beta-Grasp (ubiquitin-like)	2Fe-2S ferredoxin-like	2Fe-2S ferredoxin domains from multidomain proteins	automated matches	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
C	d2aczc_	Membrane and cell surface proteins and peptides	Heme-binding four-helical bundle	Fumarate reductase respiratory complex transmembrane subunits	Succinate dehydrogenase/Fumarate reductase transmembrane subunits (SdhC/FrdC and SdhD/FrdD)	Succinate dehydrogenase subunit SdhC	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
D	d2aczd1	Membrane and cell surface proteins and peptides	Heme-binding four-helical bundle	Fumarate reductase respiratory complex transmembrane subunits	Succinate dehydrogenase/Fumarate reductase transmembrane subunits (SdhC/FrdC and SdhD/FrdD)	Succinate dehydrogenase subunit SdhD	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	L-aspartate oxidase C-terminal domain-like	8056068	3000021	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Succinate dehydrogenase/fumarate reductase domain-like	8056067	3000054	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	2Fe-2S ferredoxin-like	8017659	3000113	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	alpha-helical ferredoxin	8017662	3000026	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Fumarate reductase respiratory complex transmembrane subunits	8043765	3000518	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Fumarate reductase respiratory complex transmembrane subunits	8043768	3000518	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF02910	e2aczA4	A: alpha bundles	X: Spectrin repeat-like	H: Succinate dehydrogenase/fumarate reductase flavoprotein C-terminal domain (From Topology)	T: Succinate dehydrogenase/fumarate reductase flavoprotein C-terminal domain	F: PF02910	ECOD (1.6)
A	PF00890	e2aczA2	A: a+b complex topology	X: Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic domain (From Topology)	H: Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic domain (From Topology)	T: Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic domain	F: PF00890	ECOD (1.6)
A	PF00890	e2aczA3	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: FAD/NAD(P)-binding domain	F: PF00890	ECOD (1.6)
B	PF13534	e2aczB1	A: alpha arrays	X: alpha-helical ferredoxin-like	H: alpha-helical ferredoxin (From Topology)	T: alpha-helical ferredoxin	F: PF13534	ECOD (1.6)
B	PF13085	e2aczB2	A: a+b two layers	X: beta-Grasp	H: Ubiquitin-related	T: Ubiquitin-like	F: PF13085	ECOD (1.6)
C	PF01127	e2aczC1	A: alpha bundles	X: Transmembrane heme-binding four-helical bundle (From Homology)	H: Transmembrane heme-binding four-helical bundle	T: Fumarate reductase respiratory complex transmembrane subunits	F: PF01127	ECOD (1.6)
D	PF01127	e2aczD1	A: alpha bundles	X: Transmembrane heme-binding four-helical bundle (From Homology)	H: Transmembrane heme-binding four-helical bundle	T: Fumarate reductase respiratory complex transmembrane subunits	F: PF01127	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.50.50.60	Alpha Beta	3-Layer(bba) Sandwich	FAD/NAD(P)-binding domain	FAD/NAD(P)-binding domain	CATH (4.3.0)
A	3.90.700.10	Alpha Beta	Alpha-Beta Complex	Flavocytochrome C3	Chain A, domain 1	CATH (4.3.0)
A	1.20.58.100	Mainly Alpha	Up-down Bundle	Methane Monooxygenase Hydroxylase	Chain G, domain 1	CATH (4.3.0)
A	4.10.80.40	Few Secondary Structures	Irregular	Rhinovirus 14, subunit 4	succinate dehydrogenase protein domain	CATH (4.3.0)
B	3.10.20.30	Alpha Beta	Roll	Ubiquitin-like (UB roll)	Beta-grasp domain	CATH (4.3.0)
B	1.10.1060.10	Mainly Alpha	Orthogonal Bundle	Fumarate Reductase Iron-sulfur Protein	Chain B, domain 2	CATH (4.3.0)
C	1.20.1300.10	Mainly Alpha	Up-down Bundle	3 helical TM bundles of succinate and fumarate reductases	Fumarate reductase/succinate dehydrogenase, transmembrane subunit	CATH (4.3.0)
D	1.20.1300.10	Mainly Alpha	Up-down Bundle	3 helical TM bundles of succinate and fumarate reductases	Fumarate reductase/succinate dehydrogenase, transmembrane subunit	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF02910	Fumarate reductase flavoprotein C-term (Succ_DH_flav_C)	Fumarate reductase flavoprotein C-term	This family contains fumarate reductases, succinate dehydrogenases and L-aspartate oxidases.	Domain
A	PF00890	FAD binding domain (FAD_binding_2)	FAD binding domain	-	Family
B	PF13085	2Fe-2S iron-sulfur cluster binding domain (Fer2_3)	2Fe-2S iron-sulfur cluster binding domain	The 2Fe-2S ferredoxin family have a general core structure consisting of beta(2)-alpha-beta(2) which abeta-grasp type fold. The domain is around one hundred amino acids with four conserved cysteine residues to which the 2Fe-2S cluster is ligated.	Domain
B	PF13534	4Fe-4S dicluster domain (Fer4_17)	4Fe-4S dicluster domain	This family includes proteins containing domains which bind to iron-sulfur clusters. Members include bacterial ferredoxins, various dehydrogenases, and various reductases. The structure of the domain is an alpha-antiparallel beta sandwich.	Domain
C	PF01127	Succinate dehydrogenase/Fumarate reductase transmembrane subunit (Sdh_cyt)	Succinate dehydrogenase/Fumarate reductase transmembrane subunit	-	Family
D	PF01127	Succinate dehydrogenase/Fumarate reductase transmembrane subunit (Sdh_cyt)	Succinate dehydrogenase/Fumarate reductase transmembrane subunit	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Succinate dehydrogenase flavoprotein subunit	oxidoreductase activity succinate dehydrogenase activity oxidoreductase activity, acting on the CH-CH group of donors catalytic activity succinate dehydrogenase (quinone) activity flavin adenine dinucleotide binding binding nucleoside phosphate binding ion binding organic cyclic compound binding anion binding nucleotide binding heterocyclic compound binding small molecule binding oxidoreductase activity succinate dehydrogenase activity oxidoreductase activity, acting on the CH-CH group of donors catalytic activity succinate dehydrogenase (quinone) activity flavin adenine dinucleotide binding binding nucleoside phosphate binding ion binding organic cyclic compound binding anion binding nucleotide binding heterocyclic compound binding small molecule binding electron transfer activity	aerobic respiration cellular respiration tricarboxylic acid cycle energy derivation by oxidation of organic compounds cellular metabolic process metabolic process cellular process primary metabolic process generation of precursor metabolites and energy aerobic electron transport chain oxidative phosphorylation electron transport chain respiratory electron transport chain anaerobic respiration	membrane cellular anatomical entity respiratory chain complex protein-containing complex intracellular anatomical structure catalytic complex succinate dehydrogenase complex membrane protein complex respiratory chain complex II respirasome oxidoreductase complex plasma membrane protein complex plasma membrane plasma membrane respirasome membrane cellular anatomical entity respiratory chain complex protein-containing complex intracellular anatomical structure catalytic complex succinate dehydrogenase complex membrane protein complex respiratory chain complex II respirasome oxidoreductase complex plasma membrane protein complex plasma membrane plasma membrane respirasome cell periphery plasma membrane succinate dehydrogenase complex plasma membrane respiratory chain complex II
B	Succinate dehydrogenase iron-sulfur protein	iron-sulfur cluster binding binding metal cluster binding small molecule binding oxidoreductase activity succinate dehydrogenase activity oxidoreductase activity, acting on the CH-CH group of donors catalytic activity succinate dehydrogenase (quinone) activity 2 iron, 2 sulfur cluster binding 3 iron, 4 sulfur cluster binding 4 iron, 4 sulfur cluster binding electron transfer activity cation binding iron-sulfur cluster binding binding metal cluster binding small molecule binding oxidoreductase activity succinate dehydrogenase activity oxidoreductase activity, acting on the CH-CH group of donors catalytic activity succinate dehydrogenase (quinone) activity 2 iron, 2 sulfur cluster binding 3 iron, 4 sulfur cluster binding 4 iron, 4 sulfur cluster binding electron transfer activity cation binding ion binding metal ion binding	aerobic respiration cellular respiration tricarboxylic acid cycle energy derivation by oxidation of organic compounds cellular metabolic process metabolic process cellular process primary metabolic process generation of precursor metabolites and energy aerobic electron transport chain oxidative phosphorylation electron transport chain respiratory electron transport chain	membrane cellular anatomical entity respiratory chain complex protein-containing complex intracellular anatomical structure catalytic complex succinate dehydrogenase complex membrane protein complex respiratory chain complex II respirasome oxidoreductase complex cell periphery plasma membrane
C	Succinate dehydrogenase cytochrome b556 subunit	oxidoreductase activity succinate dehydrogenase activity oxidoreductase activity, acting on the CH-CH group of donors catalytic activity succinate dehydrogenase (quinone) activity binding organic cyclic compound binding tetrapyrrole binding heme binding quinone binding ubiquinone binding small molecule binding electron transfer activity cation binding oxidoreductase activity succinate dehydrogenase activity oxidoreductase activity, acting on the CH-CH group of donors catalytic activity succinate dehydrogenase (quinone) activity binding organic cyclic compound binding tetrapyrrole binding heme binding quinone binding ubiquinone binding small molecule binding electron transfer activity cation binding ion binding metal ion binding	aerobic respiration cellular respiration tricarboxylic acid cycle energy derivation by oxidation of organic compounds cellular metabolic process metabolic process cellular process primary metabolic process generation of precursor metabolites and energy aerobic electron transport chain oxidative phosphorylation electron transport chain respiratory electron transport chain cytochrome complex assembly aerobic respiration cellular respiration tricarboxylic acid cycle energy derivation by oxidation of organic compounds cellular metabolic process metabolic process cellular process primary metabolic process generation of precursor metabolites and energy aerobic electron transport chain oxidative phosphorylation electron transport chain respiratory electron transport chain cytochrome complex assembly cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein-containing complex assembly cellular component organization or biogenesis	membrane cellular anatomical entity respiratory chain complex protein-containing complex intracellular anatomical structure catalytic complex succinate dehydrogenase complex membrane protein complex respiratory chain complex II respirasome oxidoreductase complex cell periphery plasma membrane
D	Succinate dehydrogenase hydrophobic membrane anchor protein	binding organic cyclic compound binding tetrapyrrole binding heme binding electron transfer activity cation binding ion binding metal ion binding small molecule binding oxidoreductase activity oxidoreductase activity, acting on the CH-CH group of donors catalytic activity	aerobic respiration cellular respiration tricarboxylic acid cycle energy derivation by oxidation of organic compounds cellular metabolic process metabolic process cellular process primary metabolic process generation of precursor metabolites and energy aerobic electron transport chain oxidative phosphorylation electron transport chain respiratory electron transport chain cytochrome complex assembly aerobic respiration cellular respiration tricarboxylic acid cycle energy derivation by oxidation of organic compounds cellular metabolic process metabolic process cellular process primary metabolic process generation of precursor metabolites and energy aerobic electron transport chain oxidative phosphorylation electron transport chain respiratory electron transport chain cytochrome complex assembly cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein-containing complex assembly cellular component organization or biogenesis	membrane cellular anatomical entity respiratory chain complex protein-containing complex intracellular anatomical structure catalytic complex succinate dehydrogenase complex membrane protein complex respiratory chain complex II respirasome oxidoreductase complex cell periphery plasma membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR015939	Fumarate reductase/succinate dehydrogenase flavoprotein-like, C-terminal	Domain
A	IPR003952	Fumarate reductase/succinate dehydrogenase, FAD-binding site	Binding Site
A	IPR037099	Fumarate reductase/succinate dehydrogenase flavoprotein-like, C-terminal domain superfamily	Homologous Superfamily
A	IPR036188	FAD/NAD(P)-binding domain superfamily	Homologous Superfamily
A	IPR003953	FAD-dependent oxidoreductase 2, FAD binding domain	Domain
A	IPR030664	FAD-dependent oxidoreductase SdhA/FrdA/AprA	Family
A	IPR027477	Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic domain superfamily	Homologous Superfamily
A	IPR014006	Succinate dehydrogenase/fumarate reductase, flavoprotein subunit	Family
A	IPR011281	Succinate dehydrogenase, flavoprotein subunit	Family
B	IPR025192	Succinate dehydogenase/fumarate reductase N-terminal	Domain
B	IPR036010	2Fe-2S ferredoxin-like superfamily	Homologous Superfamily
B	IPR001041	2Fe-2S ferredoxin-type iron-sulfur binding domain	Domain
B	IPR004489	Succinate dehydrogenase/fumarate reductase iron-sulphur protein	Family
B	IPR009051	Alpha-helical ferredoxin	Homologous Superfamily
B	IPR017900	4Fe-4S ferredoxin, iron-sulphur binding, conserved site	Conserved Site
B	IPR017896	4Fe-4S ferredoxin-type, iron-sulphur binding domain	Domain
B	IPR012675	Beta-grasp domain superfamily	Homologous Superfamily
C	IPR034804	Fumarate reductase/succinate dehydrogenase, transmembrane subunit	Homologous Superfamily
C	IPR014314	Succinate dehydrogenase, cytochrome b556 subunit	Family
C	IPR018495	Succinate dehydrogenase, cytochrome b subunit, conserved site	Conserved Site
C	IPR000701	Succinate dehydrogenase/fumarate reductase type B, transmembrane subunit	Family
D	IPR034804	Fumarate reductase/succinate dehydrogenase, transmembrane subunit	Homologous Superfamily
D	IPR000701	Succinate dehydrogenase/fumarate reductase type B, transmembrane subunit	Family
D	IPR014312	Succinate dehydrogenase, hydrophobic membrane anchor	Family

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, B, C, D	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A, B, C, D	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, B, C, D	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Electron Transport Chain Complexes: Complex II	Succinate:quinone oxidoreductase (SQR, Complex II) with Atpenin A5