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7jz2

Succinate: quinone oxidoreductase SQR from E.coli K12

Method: ELECTRON MICROSCOPY
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1. Protein Identity and Related Structures Protein Identity & Related Structures

Succinate dehydrogenase flavoprotein subunit

OrganismNot specified

UniProt P0AC41

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 12 Succinate dehydrogenase iron-sulfur subunit × 3 （P07014） Succinate dehydrogenase cytochrome b556 subunit × 3 （P69054） Succinate dehydrogenase hydrophobic membrane anchor subunit × 3 （I2WBK2） FLAVIN-ADENINE DINUCLEOTIDE × 3 SODIUM ION × 3 FE2/S2 (INORGANIC) CLUSTER × 3 IRON/SULFUR CLUSTER × 3 FE3-S4 CLUSTER × 3 1,2-Distearoyl-sn-glycerophosphoethanolamine × 3 PROTOPORPHYRIN IX CONTAINING FE × 3 UBIQUINONE-2 × 3 Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
1nek 1nek 1nek 1nen 1nen 1nen 2wdq 2wdq 2wdq 2wdr 2wdr 2wdr

30 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name SDHA_ECOLI
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–588； UniProt 1–588 Author chain E； PDBConstruct 1–588； UniProt 1–588 Author chain I； PDBConstruct 1–588； UniProt 1–588

Succinate dehydrogenase iron-sulfur subunit

OrganismNot specified

UniProt P07014

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 12 Succinate dehydrogenase flavoprotein subunit × 3 （P0AC41） Succinate dehydrogenase cytochrome b556 subunit × 3 （P69054） Succinate dehydrogenase hydrophobic membrane anchor subunit × 3 （I2WBK2） FLAVIN-ADENINE DINUCLEOTIDE × 3 SODIUM ION × 3 FE2/S2 (INORGANIC) CLUSTER × 3 IRON/SULFUR CLUSTER × 3 FE3-S4 CLUSTER × 3 1,2-Distearoyl-sn-glycerophosphoethanolamine × 3 PROTOPORPHYRIN IX CONTAINING FE × 3 UBIQUINONE-2 × 3 Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
1nek 1nek 1nek 1nen 1nen 1nen 2acz 2wdq 2wdq 2wdq 2wdr 2wdr

29 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name SDHB_ECOLI
Isoform —
PDB entities 2
Chains and sequence ranges Author chain B； PDBConstruct 1–238； UniProt 1–238 Author chain F； PDBConstruct 1–238； UniProt 1–238 Author chain J； PDBConstruct 1–238； UniProt 1–238

Succinate dehydrogenase cytochrome b556 subunit

OrganismNot specified

UniProt P69054

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 12 Succinate dehydrogenase flavoprotein subunit × 3 （P0AC41） Succinate dehydrogenase iron-sulfur subunit × 3 （P07014） Succinate dehydrogenase hydrophobic membrane anchor subunit × 3 （I2WBK2） FLAVIN-ADENINE DINUCLEOTIDE × 3 SODIUM ION × 3 FE2/S2 (INORGANIC) CLUSTER × 3 IRON/SULFUR CLUSTER × 3 FE3-S4 CLUSTER × 3 1,2-Distearoyl-sn-glycerophosphoethanolamine × 3 PROTOPORPHYRIN IX CONTAINING FE × 3 UBIQUINONE-2 × 3 Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
1nek 1nek 1nek 1nen 1nen 1nen 2acz 2wdq 2wdq 2wdq 2wdr 2wdr

29 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name DHSC_ECOLI
Isoform —
PDB entities 3
Chains and sequence ranges Author chain C； PDBConstruct 1–129； UniProt 1–129 Author chain G； PDBConstruct 1–129； UniProt 1–129 Author chain K； PDBConstruct 1–129； UniProt 1–129

Succinate dehydrogenase hydrophobic membrane anchor subunit

OrganismNot specified

UniProt I2WBK2

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 12 Succinate dehydrogenase flavoprotein subunit × 3 （P0AC41） Succinate dehydrogenase iron-sulfur subunit × 3 （P07014） Succinate dehydrogenase cytochrome b556 subunit × 3 （P69054） FLAVIN-ADENINE DINUCLEOTIDE × 3 SODIUM ION × 3 FE2/S2 (INORGANIC) CLUSTER × 3 IRON/SULFUR CLUSTER × 3 FE3-S4 CLUSTER × 3 1,2-Distearoyl-sn-glycerophosphoethanolamine × 3 PROTOPORPHYRIN IX CONTAINING FE × 3 UBIQUINONE-2 × 3 Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
7jz2

1 assemblies

View Construct and Data Evidence
UniProt name I2WBK2_ECOLX
Isoform —
PDB entities 4
Chains and sequence ranges Author chain D； PDBConstruct 1–115； UniProt 1–115 Author chain H； PDBConstruct 1–115； UniProt 1–115 Author chain L； PDBConstruct 1–115； UniProt 1–115

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_id7jz2
Deposition date deposition_date2020-09-01
Structure title titleSuccinate: quinone oxidoreductase SQR from E.coli K12
Keywords keywordsComplex, Succinate: quinone oxidoreductase, SdhA, sdhB, SdhC, SdhD, ELECTRON TRANSPORT, ELECTRON TRANSPORT-OXIDOREDUCTASE complex; ELECTRON TRANSPORT/OXIDOREDUCTASE
Experimental Method methodELECTRON MICROSCOPY
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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.

7jz2__assembly_1__model_1

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

Download this curve (.dat)

7jz2__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.

7jz2__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）45.54 Å
Rg (electron density)45.17 Å
Total Rg45.24 Å
Atom count22866
Residues2871
Excluded volume409000 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 7jz2__assembly_1__model_1 dodecameric （12） 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 (12)

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6. Fold Classification (SCOP + CATH) 18 domains

SCOP 2.08 (18 domains)

Domain ID domain_idd7jz2a1
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_idd7jz2a2
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_idd7jz2b1
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_idd7jz2b2
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_idd7jz2c_
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.21.2.2 — Succinate dehydrogenase/Fumarate reductase transmembrane subunits (SdhC/FrdC and SdhD/FrdD)
Domain ID domain_idd7jz2d_
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.21.2.2 — Succinate dehydrogenase/Fumarate reductase transmembrane subunits (SdhC/FrdC and SdhD/FrdD)
Domain ID domain_idd7jz2e1
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_idd7jz2e2
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_idd7jz2f1
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_idd7jz2f2
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_idd7jz2g_
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.21.2.2 — Succinate dehydrogenase/Fumarate reductase transmembrane subunits (SdhC/FrdC and SdhD/FrdD)
Domain ID domain_idd7jz2h_
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.21.2.2 — Succinate dehydrogenase/Fumarate reductase transmembrane subunits (SdhC/FrdC and SdhD/FrdD)
Domain ID domain_idd7jz2i1
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_idd7jz2i2
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_idd7jz2j1
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_idd7jz2j2
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_idd7jz2k_
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.21.2.2 — Succinate dehydrogenase/Fumarate reductase transmembrane subunits (SdhC/FrdC and SdhD/FrdD)
Domain ID domain_idd7jz2l_
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.21.2.2 — Succinate dehydrogenase/Fumarate reductase transmembrane subunits (SdhC/FrdC and SdhD/FrdD)
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7. Citations (1)