8B6G

Cryo-EM structure of succinate dehydrogenase complex (complex-II) in respiratory supercomplex of Tetrahymena thermophila

External Resource: Annotation

Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Membrane Protein Annotation: OPM

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
J [auth CE]	F_UNCLASSIFIED	e8b6gCE1	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: NAD(P)-binding Rossmann-fold domains	F: F_UNCLASSIFIED	ECOD (1.6)
D [auth CA]	PF02910	e8b6gCA2	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)
D [auth CA]	PF00890	e8b6gCA3	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)
D [auth CA]	PF00890	e8b6gCA1	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: FAD/NAD(P)-binding domain	F: PF00890	ECOD (1.6)
F [auth CB]	PF13534	e8b6gCB2	A: alpha arrays	X: alpha-helical ferredoxin-like	H: alpha-helical ferredoxin (From Topology)	T: alpha-helical ferredoxin	F: PF13534	ECOD (1.6)
F [auth CB]	PF13085	e8b6gCB1	A: a+b two layers	X: beta-Grasp	H: Ubiquitin-related	T: Ubiquitin-like	F: PF13085	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
D [auth CA]	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
D [auth CA]	PF00890	FAD binding domain (FAD_binding_2)	FAD binding domain	-	Family
F [auth CB]	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
F [auth CB]	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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth CH]	Diphthamide synthesis protein	-	-	-
J [auth CE]	NmrA domain-containing protein	-	-	-
K [auth CJ]	Transmembrane protein, putative	-	-	membrane cellular anatomical entity
L [auth CN]	Transmembrane protein, putative	-	-	membrane cellular anatomical entity
M [auth CC]	Cytochrome b-c1 complex subunit 8	-	-	-
N [auth CO]	SDHTT11	-	-	-
O [auth CD]	SDHD	-	-	-
B [auth CM]	Transmembrane protein, putative	-	-	membrane cellular anatomical entity
C [auth CL]	Transposase	-	-	-
D [auth CA]	Succinate dehydrogenase [ubiquinone] flavoprotein subunit, mitochondrial	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 oxidoreductase activity, acting on the CH-CH group of donors, quinone or related compound as acceptor catalytic 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 oxidoreductase activity, acting on the CH-CH group of donors, quinone or related compound as acceptor catalytic activity succinate dehydrogenase (quinone) activity 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 mitochondrial electron transport, succinate to ubiquinone aerobic electron transport chain oxidative phosphorylation ATP synthesis coupled electron transport electron transport chain 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 mitochondrial electron transport, succinate to ubiquinone aerobic electron transport chain oxidative phosphorylation ATP synthesis coupled electron transport electron transport chain respiratory electron transport chain mitochondrial ATP synthesis coupled electron transport anaerobic respiration	membrane-bounded organelle respiratory chain complex protein-containing complex intracellular anatomical structure mitochondrial membrane organelle inner membrane mitochondrion mitochondrial respirasome membrane protein complex intracellular organelle organelle envelope mitochondrial respiratory chain complex II, succinate dehydrogenase complex (ubiquinone) oxidoreductase complex mitochondrial protein-containing complex membrane-bounded organelle respiratory chain complex protein-containing complex intracellular anatomical structure mitochondrial membrane organelle inner membrane mitochondrion mitochondrial respirasome membrane protein complex intracellular organelle organelle envelope mitochondrial respiratory chain complex II, succinate dehydrogenase complex (ubiquinone) oxidoreductase complex mitochondrial protein-containing complex catalytic complex succinate dehydrogenase complex membrane cellular anatomical entity intracellular membrane-bounded organelle mitochondrial inner membrane fumarate reductase complex inner mitochondrial membrane protein complex succinate dehydrogenase complex (ubiquinone) mitochondrial envelope organelle respiratory chain complex II respirasome tricarboxylic acid cycle heteromeric enzyme complex cytoplasm organelle membrane
E [auth CI]	DUF4885 domain-containing protein	-	-	-
F [auth CB]	Succinate dehydrogenase (quinone)	iron-sulfur cluster binding 2 iron, 2 sulfur cluster binding binding metal cluster binding small molecule binding 3 iron, 4 sulfur cluster binding oxidoreductase activity succinate dehydrogenase activity oxidoreductase activity, acting on the CH-CH group of donors oxidoreductase activity, acting on the CH-CH group of donors, quinone or related compound as acceptor catalytic activity succinate dehydrogenase (quinone) activity 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 respiratory electron transport chain electron transport chain	membrane-bounded organelle mitochondrial membrane intracellular anatomical structure organelle inner membrane mitochondrion membrane cellular anatomical entity intracellular membrane-bounded organelle mitochondrial inner membrane intracellular organelle organelle envelope mitochondrial envelope organelle cytoplasm membrane-bounded organelle mitochondrial membrane intracellular anatomical structure organelle inner membrane mitochondrion membrane cellular anatomical entity intracellular membrane-bounded organelle mitochondrial inner membrane intracellular organelle organelle envelope mitochondrial envelope organelle cytoplasm organelle membrane cell periphery plasma membrane
G [auth CF]	Transmembrane protein, putative	-	-	membrane cellular anatomical entity
H [auth CG]	SDHTT3	-	-	-
I [auth CK]	Transmembrane protein, putative	-	-	membrane cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
J [auth CE]	IPR036291	NAD(P)-binding domain superfamily	Homologous Superfamily
D [auth CA]	IPR015939	Fumarate reductase/succinate dehydrogenase flavoprotein-like, C-terminal	Domain
D [auth CA]	IPR003952	Fumarate reductase/succinate dehydrogenase, FAD-binding site	Binding Site
D [auth CA]	IPR037099	Fumarate reductase/succinate dehydrogenase flavoprotein-like, C-terminal domain superfamily	Homologous Superfamily
D [auth CA]	IPR036188	FAD/NAD(P)-binding domain superfamily	Homologous Superfamily
D [auth CA]	IPR003953	FAD-dependent oxidoreductase 2, FAD binding domain	Domain
D [auth CA]	IPR030664	FAD-dependent oxidoreductase SdhA/FrdA/AprA	Family
D [auth CA]	IPR027477	Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic domain superfamily	Homologous Superfamily
D [auth CA]	IPR014006	Succinate dehydrogenase/fumarate reductase, flavoprotein subunit	Family
D [auth CA]	IPR011281	Succinate dehydrogenase, flavoprotein subunit	Family
F [auth CB]	IPR025192	Succinate dehydogenase/fumarate reductase N-terminal	Domain
F [auth CB]	IPR036010	2Fe-2S ferredoxin-like superfamily	Homologous Superfamily
F [auth CB]	IPR006058	2Fe-2S ferredoxin, iron-sulphur binding site	Binding Site
F [auth CB]	IPR004489	Succinate dehydrogenase/fumarate reductase iron-sulphur protein	Family
F [auth CB]	IPR009051	Alpha-helical ferredoxin	Homologous Superfamily
F [auth CB]	IPR017900	4Fe-4S ferredoxin, iron-sulphur binding, conserved site	Conserved Site
F [auth CB]	IPR017896	4Fe-4S ferredoxin-type, iron-sulphur binding domain	Domain
F [auth CB]	IPR012675	Beta-grasp domain superfamily	Homologous Superfamily

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
B [auth CM], D [auth CA], G [auth CF], I [auth CK], K [auth CJ] B [auth CM], D [auth CA], G [auth CF], I [auth CK], K [auth CJ], L [auth CN]	OPM	Transmembrane	Alpha-helical polytopic	Electron transport chain complex II superfamily	Succinate dehydrogenase/fumarate reductase

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.