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1h21

A novel iron centre in the split-Soret cytochrome c from Desulfovibrio desulfuricans ATCC 27774

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

SPLIT-SORET CYTOCHROME C

OrganismNot specified

UniProt P81040

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein homooligomer Homooligomer Protein 2 HEME C × 4 water × 2 Consistent with protein count
2 Protein homooligomer Homooligomer Protein 2 HEME C × 4 water × 2 Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer
1h21 1h21

2 assemblies

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex

None

View Construct and Data Evidence
UniProt name CYCX_DESDE
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–247； UniProt 1–247 Author chain B； PDBConstruct 1–247； UniProt 1–247 Author chain C； PDBConstruct 1–247； UniProt 1–247 Author chain D； PDBConstruct 1–247； UniProt 1–247

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_id1h21
Deposition date deposition_date2002-07-30
Structure title titleA novel iron centre in the split-Soret cytochrome c from Desulfovibrio desulfuricans ATCC 27774
Keywords keywords;CYTOCHROME, DIMERIC DI-HEME CYTOCHROME, STACKED HEME ARRANGEMENT, NOVEL FOLD, NOVEL IRON-SULFUR CENTRE, ELECTRON TRANSPORT, SULFATE RESPIRATION ;; CYTOCHROME
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.

1h21__assembly_1__model_1

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

Download this curve (.dat)

1h21__assembly_1__model_1 | I(q)

10-2 10-1 105 106 107 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

1h21__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）22.38 Å
Rg (electron density)21.25 Å
Total Rg22.11 Å
Atom count3864
Residues480
Excluded volume68520 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 1h21__assembly_1__model_1 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
2 1 1h21__assembly_2__model_1 dimeric （2） 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 (3)

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (4 domains)

Domain ID domain_idd1h21a_
Class classa — All alpha proteins
Fold Fold folda.138 — Multiheme cytochromes
Superfamily Superfamily superfamilya.138.1 — Multiheme cytochromes
Family Family familya.138.1.3 — Di-heme elbow motif
Domain ID domain_idd1h21b_
Class classa — All alpha proteins
Fold Fold folda.138 — Multiheme cytochromes
Superfamily Superfamily superfamilya.138.1 — Multiheme cytochromes
Family Family familya.138.1.3 — Di-heme elbow motif
Domain ID domain_idd1h21c_
Class classa — All alpha proteins
Fold Fold folda.138 — Multiheme cytochromes
Superfamily Superfamily superfamilya.138.1 — Multiheme cytochromes
Family Family familya.138.1.3 — Di-heme elbow motif
Domain ID domain_idd1h21d_
Class classa — All alpha proteins
Fold Fold folda.138 — Multiheme cytochromes
Superfamily Superfamily superfamilya.138.1 — Multiheme cytochromes
Family Family familya.138.1.3 — Di-heme elbow motif
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7. Citations (2)