1cfm

CYTOCHROME F FROM CHLAMYDOMONAS REINHARDTII

Method: X-RAY DIFFRACTION

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1. Protein Identity and Related Structures Protein Identity & Related Structures

CYTOCHROME F

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 3	PROTOPORPHYRIN IX CONTAINING FE × 3 water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CYF_CHLRE
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–251； UniProt 32–282 Author chain B； PDBConstruct 1–251； UniProt 32–282 Author chain C； PDBConstruct 1–251； UniProt 32–282

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_id	1cfm
Deposition date deposition_date	1998-09-18
Structure title title	CYTOCHROME F FROM CHLAMYDOMONAS REINHARDTII
Keywords keywords	CYTOCHROME F, PLASTOCYANIN, PROTON WIRE, HEME, ELECTRON TRANSPORT; ELECTRON TRANSPORT
Experimental Method method	X-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.

1cfm__assembly_1__model_1

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

Download this curve (.dat)

1cfm__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1cfm__assembly_1__model_1 | P(r) · Pending

P(r) will be calculated and displayed separately for the same assembly/model.

Rg（Guinier）	35.59 Å
Rg (electron density)	35.76 Å
Total Rg	36.09 Å
Atom count	5877
Residues	753
Excluded volume	105400 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1cfm__assembly_1__model_1`	trimeric （3）	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) 12 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d1cfma1
Class class	b — All beta proteins
Fold Fold fold	b.2 — Common fold of diphtheria toxin/transcription factors/cytochrome f
Superfamily Superfamily superfamily	b.2.6 — Cytochrome f, large domain
Family Family family	b.2.6.1 — Cytochrome f, large domain

Domain ID domain_id	d1cfma2
Class class	b — All beta proteins
Fold Fold fold	b.84 — Barrel-sandwich hybrid
Superfamily Superfamily superfamily	b.84.2 — Rudiment single hybrid motif
Family Family family	b.84.2.2 — Cytochrome f, small domain

Domain ID domain_id	d1cfmb1
Class class	b — All beta proteins
Fold Fold fold	b.2 — Common fold of diphtheria toxin/transcription factors/cytochrome f
Superfamily Superfamily superfamily	b.2.6 — Cytochrome f, large domain
Family Family family	b.2.6.1 — Cytochrome f, large domain

Domain ID domain_id	d1cfmb2
Class class	b — All beta proteins
Fold Fold fold	b.84 — Barrel-sandwich hybrid
Superfamily Superfamily superfamily	b.84.2 — Rudiment single hybrid motif
Family Family family	b.84.2.2 — Cytochrome f, small domain

Domain ID domain_id	d1cfmc1
Class class	b — All beta proteins
Fold Fold fold	b.2 — Common fold of diphtheria toxin/transcription factors/cytochrome f
Superfamily Superfamily superfamily	b.2.6 — Cytochrome f, large domain
Family Family family	b.2.6.1 — Cytochrome f, large domain

Domain ID domain_id	d1cfmc2
Class class	b — All beta proteins
Fold Fold fold	b.84 — Barrel-sandwich hybrid
Superfamily Superfamily superfamily	b.84.2 — Rudiment single hybrid motif
Family Family family	b.84.2.2 — Cytochrome f, small domain

CATH v4.4 (6 domains)

Domain ID domain_id	1cfmA01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	830 — Cytochrome f large domain

Domain ID domain_id	1cfmA02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	100 — RNA polymerase II/Efflux pump adaptor protein, barrel-sandwich hybrid domain

Domain ID domain_id	1cfmB01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	830 — Cytochrome f large domain

Domain ID domain_id	1cfmB02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	100 — RNA polymerase II/Efflux pump adaptor protein, barrel-sandwich hybrid domain

Domain ID domain_id	1cfmC01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	830 — Cytochrome f large domain

Domain ID domain_id	1cfmC02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	100 — RNA polymerase II/Efflux pump adaptor protein, barrel-sandwich hybrid domain

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Unit-cell length a length_a	75.624 Å
Unit-cell length b length_b	94.943 Å
Unit-cell length c length_c	119.920 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	12

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	2.000 Å
Low-resolution limit resolution_low	25.000 Å
R factor r_factor	0.2140
R_work r_work	0.2140
R_free r_free	0.2710

Description description	CYTOCHROME F
Molecular weight formula_weight	27182.0 kDa
Source method src_method	nat
Copy count entity_count	3

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C
Atom count atom_count	6878

CYTOCHROME F FROM CHLAMYDOMONAS REINHARDTII

1. Protein Identity and Related Structures Protein Identity & Related Structures

CYTOCHROME F

State in the Current Structure

Other States of the Same Protein in the Database

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

1cfm__assembly_1__model_1

1cfm__assembly_1__model_1 | I(q)

1cfm__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (1)

Description description	PROTOPORPHYRIN IX CONTAINING FE
Molecular weight formula_weight	616.5 kDa
Source method src_method	syn
Copy count entity_count	3

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	1001

CYTOCHROME F FROM CHLAMYDOMONAS REINHARDTII

1. Protein Identity and Related Structures Protein Identity & Related Structures

CYTOCHROME F

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

1cfm__assembly_1__model_1

1cfm__assembly_1__model_1 | I(q)

1cfm__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

7. Citations (1)