2bs4

GLU C180 -> ILE VARIANT QUINOL:FUMARATE REDUCTASE FROMWOLINELLA SUCCINOGENES

Method: X-RAY DIFFRACTION
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1. Protein Identity and Related Structures Protein Identity & Related Structures

QUINOL-FUMARATE REDUCTASE FLAVOPROTEIN SUBUNIT A

OrganismNot specified

UniProt P17412

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 6 QUINOL-FUMARATE REDUCTASE IRON-SULFUR SUBUNIT B × 2 (P17596) QUINOL-FUMARATE REDUCTASE DIHEME CYTOCHROME B SUBUNIT C × 2 (P17413) FLAVIN-ADENINE DINUCLEOTIDE × 2 CITRIC ACID × 2 FE3-S4 CLUSTER × 2 PROTOPORPHYRIN IX CONTAINING FE × 4 SODIUM ION × 2 FE2/S2 (INORGANIC) CLUSTER × 2 IRON/SULFUR CLUSTER × 2 DODECYL-BETA-D-MALTOSIDE × 2 2,3-DIMETHYL-1,4-NAPHTHOQUINONE × 2 water × 6 Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence
UniProt name FRDA_WOLSU
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–656; UniProt 1–656 Author chain D; PDBConstruct 1–656; UniProt 1–656

QUINOL-FUMARATE REDUCTASE IRON-SULFUR SUBUNIT B

OrganismNot specified

UniProt P17596

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 6 QUINOL-FUMARATE REDUCTASE FLAVOPROTEIN SUBUNIT A × 2 (P17412) QUINOL-FUMARATE REDUCTASE DIHEME CYTOCHROME B SUBUNIT C × 2 (P17413) FLAVIN-ADENINE DINUCLEOTIDE × 2 CITRIC ACID × 2 FE3-S4 CLUSTER × 2 PROTOPORPHYRIN IX CONTAINING FE × 4 SODIUM ION × 2 FE2/S2 (INORGANIC) CLUSTER × 2 IRON/SULFUR CLUSTER × 2 DODECYL-BETA-D-MALTOSIDE × 2 2,3-DIMETHYL-1,4-NAPHTHOQUINONE × 2 water × 6 Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence
UniProt name FRDB_WOLSU
Isoform —
PDB entities 2
Chains and sequence ranges Author chain B; PDBConstruct 1–239; UniProt 1–239 Author chain E; PDBConstruct 1–239; UniProt 1–239

QUINOL-FUMARATE REDUCTASE DIHEME CYTOCHROME B SUBUNIT C

OrganismNot specified

UniProt P17413

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 6 QUINOL-FUMARATE REDUCTASE FLAVOPROTEIN SUBUNIT A × 2 (P17412) QUINOL-FUMARATE REDUCTASE IRON-SULFUR SUBUNIT B × 2 (P17596) FLAVIN-ADENINE DINUCLEOTIDE × 2 CITRIC ACID × 2 FE3-S4 CLUSTER × 2 PROTOPORPHYRIN IX CONTAINING FE × 4 SODIUM ION × 2 FE2/S2 (INORGANIC) CLUSTER × 2 IRON/SULFUR CLUSTER × 2 DODECYL-BETA-D-MALTOSIDE × 2 2,3-DIMETHYL-1,4-NAPHTHOQUINONE × 2 water × 6 Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence
UniProt name FRDC_WOLSU
Isoform —
PDB entities 3
Chains and sequence ranges Author chain C; PDBConstruct 1–256; UniProt 1–256 Author chain F; PDBConstruct 1–256; UniProt 1–256

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id2bs4
Deposition date deposition_date2005-05-14
Structure title titleGLU C180 -> ILE VARIANT QUINOL:FUMARATE REDUCTASE FROMWOLINELLA SUCCINOGENES
Keywords keywords;2FE-2S, 3FE-4S, 4FE-4S, CITRIC ACID CYCLE, DIHAEM CYTOCHROME B, ELECTRON TRANSPORT, FAD, FLAVOPROTEIN, FUMARATE REDUCTASE, HEME, ION-SULPHUR PROTEIN, IRON, IRON-SULFUR, METAL-BINDING, OXIDOREDUCTASE, RESPIRATORY CHAIN, SUCCINATE DEHYDROGENASE, TRANSMEMBRANE, TRICARBOXYLIC ACID CYCLE ;; OXIDOREDUCTASE
Experimental Method methodX-RAY DIFFRACTION
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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

2bs4__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

2bs4__assembly_1__model_1 | I(q)

10-2 10-1 106 107 108 109 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

2bs4__assembly_1__model_1 | P(r) · Pending

The new assembly/model P(r) has not been calculated yet This placeholder does not display legacy data r (Angstrom) P(r)
P(r) will be calculated and displayed separately for the same assembly/model.
Rg(Guinier)43.75 Å
Rg (electron density)43.67 Å
Total Rg43.55 Å
Atom count18578
Residues2300
Excluded volume332400 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 2bs4__assembly_1__model_1 hexameric (6) Success 4.1.3-1-20251215 (887e7ef) View Download
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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (13)

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6. Fold Classification (SCOP + CATH) 26 domains

SCOP 2.08 (12 domains)

Domain ID domain_idd2bs4a1
Class classa — All alpha proteins
Fold Fold folda.7 — Spectrin repeat-like
Superfamily Superfamily superfamilya.7.3 — Succinate dehydrogenase/fumarate reductase flavoprotein C-terminal domain
Family Family familya.7.3.1 — Succinate dehydrogenase/fumarate reductase flavoprotein C-terminal domain
Domain ID domain_idd2bs4a2
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.3 — FAD/NAD(P)-binding domain
Superfamily Superfamily superfamilyc.3.1 — FAD/NAD(P)-binding domain
Family Family familyc.3.1.4 — Succinate dehydrogenase/fumarate reductase flavoprotein N-terminal domain
Domain ID domain_idd2bs4a3
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.168 — Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic domain
Superfamily Superfamily superfamilyd.168.1 — Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic domain
Family Family familyd.168.1.1 — Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic domain
Domain ID domain_idd2bs4b1
Class classa — All alpha proteins
Fold Fold folda.1 — Globin-like
Superfamily Superfamily superfamilya.1.2 — alpha-helical ferredoxin
Family Family familya.1.2.1 — Fumarate reductase/Succinate dehydogenase iron-sulfur protein, C-terminal domain
Domain ID domain_idd2bs4b2
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.15 — beta-Grasp (ubiquitin-like)
Superfamily Superfamily superfamilyd.15.4 — 2Fe-2S ferredoxin-like
Family Family familyd.15.4.2 — 2Fe-2S ferredoxin domains from multidomain proteins
Domain ID domain_idd2bs4c1
Class classf — Membrane and cell surface proteins and peptides
Fold Fold foldf.21 — Heme-binding four-helical bundle
Superfamily Superfamily superfamilyf.21.2 — Fumarate reductase respiratory complex transmembrane subunits
Family Family familyf.21.2.1 — Fumarate reductase respiratory complex cytochrome b subunit, FrdC
Domain ID domain_idd2bs4d1
Class classa — All alpha proteins
Fold Fold folda.7 — Spectrin repeat-like
Superfamily Superfamily superfamilya.7.3 — Succinate dehydrogenase/fumarate reductase flavoprotein C-terminal domain
Family Family familya.7.3.1 — Succinate dehydrogenase/fumarate reductase flavoprotein C-terminal domain
Domain ID domain_idd2bs4d2
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.3 — FAD/NAD(P)-binding domain
Superfamily Superfamily superfamilyc.3.1 — FAD/NAD(P)-binding domain
Family Family familyc.3.1.4 — Succinate dehydrogenase/fumarate reductase flavoprotein N-terminal domain
Domain ID domain_idd2bs4d3
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.168 — Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic domain
Superfamily Superfamily superfamilyd.168.1 — Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic domain
Family Family familyd.168.1.1 — Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic domain
Domain ID domain_idd2bs4e1
Class classa — All alpha proteins
Fold Fold folda.1 — Globin-like
Superfamily Superfamily superfamilya.1.2 — alpha-helical ferredoxin
Family Family familya.1.2.1 — Fumarate reductase/Succinate dehydogenase iron-sulfur protein, C-terminal domain
Domain ID domain_idd2bs4e2
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.15 — beta-Grasp (ubiquitin-like)
Superfamily Superfamily superfamilyd.15.4 — 2Fe-2S ferredoxin-like
Family Family familyd.15.4.2 — 2Fe-2S ferredoxin domains from multidomain proteins
Domain ID domain_idd2bs4f_
Class classf — Membrane and cell surface proteins and peptides
Fold Fold foldf.21 — Heme-binding four-helical bundle
Superfamily Superfamily superfamilyf.21.2 — Fumarate reductase respiratory complex transmembrane subunits
Family Family familyf.21.2.1 — Fumarate reductase respiratory complex cytochrome b subunit, FrdC

CATH v4.4 (14 domains)

Domain ID domain_id2bs4A01
Class class3 — Alpha Beta
Architecture architecture50 — 3-Layer(bba) Sandwich
Topology topology50 — FAD/NAD(P)-binding domain
Homologous superfamily homologous superfamily60 — FAD/NAD(P)-binding domain
Domain ID domain_id2bs4A02
Class class3 — Alpha Beta
Architecture architecture90 — Alpha-Beta Complex
Topology topology700 — Flavocytochrome C3; Chain A, domain 1
Homologous superfamily homologous superfamily10 — Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic domain
Domain ID domain_id2bs4A03
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology58 — Methane Monooxygenase Hydroxylase; Chain G, domain 1
Homologous superfamily homologous superfamily100 — Fumarate reductase/succinate dehydrogenase flavoprotein-like, C-terminal domain
Domain ID domain_id2bs4A04
Class class3 — Alpha Beta
Architecture architecture10 — Roll
Topology topology20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily820 —
Domain ID domain_id2bs4B01
Class class3 — Alpha Beta
Architecture architecture10 — Roll
Topology topology20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily30 — Beta-grasp domain
Domain ID domain_id2bs4B02
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology1060 — Fumarate Reductase Iron-sulfur Protein; Chain B, domain 2
Homologous superfamily homologous superfamily10 — Alpha-helical ferredoxin
Domain ID domain_id2bs4C00
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology1300 — 3 helical TM bundles of succinate and fumarate reductases
Homologous superfamily homologous superfamily10 — Fumarate reductase/succinate dehydrogenase, transmembrane subunit
Domain ID domain_id2bs4D01
Class class3 — Alpha Beta
Architecture architecture50 — 3-Layer(bba) Sandwich
Topology topology50 — FAD/NAD(P)-binding domain
Homologous superfamily homologous superfamily60 — FAD/NAD(P)-binding domain
Domain ID domain_id2bs4D02
Class class3 — Alpha Beta
Architecture architecture90 — Alpha-Beta Complex
Topology topology700 — Flavocytochrome C3; Chain A, domain 1
Homologous superfamily homologous superfamily10 — Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic domain
Domain ID domain_id2bs4D03
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology58 — Methane Monooxygenase Hydroxylase; Chain G, domain 1
Homologous superfamily homologous superfamily100 — Fumarate reductase/succinate dehydrogenase flavoprotein-like, C-terminal domain
Domain ID domain_id2bs4D04
Class class3 — Alpha Beta
Architecture architecture10 — Roll
Topology topology20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily820 —
Domain ID domain_id2bs4E01
Class class3 — Alpha Beta
Architecture architecture10 — Roll
Topology topology20 — Ubiquitin-like (UB roll)
Homologous superfamily homologous superfamily30 — Beta-grasp domain
Domain ID domain_id2bs4E02
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology1060 — Fumarate Reductase Iron-sulfur Protein; Chain B, domain 2
Homologous superfamily homologous superfamily10 — Alpha-helical ferredoxin
Domain ID domain_id2bs4F00
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology1300 — 3 helical TM bundles of succinate and fumarate reductases
Homologous superfamily homologous superfamily10 — Fumarate reductase/succinate dehydrogenase, transmembrane subunit
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7. Citations (6)