SAXSdb — 2n18

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

Cytochrome c peroxidase, mitochondrial

Saccharomyces cerevisiae

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	Cytochrome c iso-1 × 1 （P00044） Cytochrome c iso-1 × 1 （P00044） PROTOPORPHYRIN IX CONTAINING FE × 1 HEME C × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CCPR_YEAST
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–294； UniProt 68–361

Cytochrome c iso-1

Saccharomyces cerevisiae

UniProt P00044

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	Cytochrome c peroxidase, mitochondrial × 1 （P00431） PROTOPORPHYRIN IX CONTAINING FE × 1 HEME C × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CYC1_YEAST
Isoform	—
PDB entities	2, 3
Chains and sequence ranges	Author chain B； PDBConstruct 2–108； UniProt 3–109 Author chain C； PDBConstruct 1–108； UniProt 2–109

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	2n18
Deposition date deposition_date	2015-03-24
Structure title title	Dominant form of the low-affinity complex of yeast cytochrome c and cytochrome c peroxidase
Keywords keywords	cytochrome c, cytochrome c peroxidase, low affinity complex, OXIDOREDUCTASE-ELECTRON TRANSPORT complex; OXIDOREDUCTASE/ELECTRON TRANSPORT
Experimental Method method	SOLUTION NMR

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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.

2n18__assembly_1__model_1

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

Download this curve (.dat)

2n18__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2n18__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	27.25 Å
Rg (electron density)	26.52 Å
Total Rg	27.28 Å
Atom count	8241
Residues	510
Excluded volume	74326 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2n18__assembly_1__model_1`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	2	`2n18__assembly_1__model_2`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	3	`2n18__assembly_1__model_3`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	4	`2n18__assembly_1__model_4`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	5	`2n18__assembly_1__model_5`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	6	`2n18__assembly_1__model_6`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	7	`2n18__assembly_1__model_7`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	8	`2n18__assembly_1__model_8`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	9	`2n18__assembly_1__model_9`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	10	`2n18__assembly_1__model_10`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	11	`2n18__assembly_1__model_11`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	12	`2n18__assembly_1__model_12`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	13	`2n18__assembly_1__model_13`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	14	`2n18__assembly_1__model_14`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	15	`2n18__assembly_1__model_15`	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 (5)

Entity 1 Entity 1 polymer

Description description	Cytochrome c peroxidase, mitochondrial
Molecular weight formula_weight	33543.2 kDa
EC 编号 ec_number	1.11.1.5
Mutation mutation	C128A, V197C
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	123615

TTPLVHVASVEKGRSYEDFQKVYNAIALKLREDDEYDNYIGYGPVLVRLAWHTSGTWDKHDNTGGSYGGTYRFKKEFNDPSNAGLQNGFKFLEPIHKEFPWISSGDLFSLGGVTAVQEMQGPKIPWRAGRVDTPEDTTPDNGRLPDADKDADYVRTFFQRLNMNDREVVALMGAHALGKTHLKNSGYEGPWGAANNCFTNEFYLNLLNEDWKLEKNDANNEQWDSKSGYMMLPTDYSLIQDPKYLSIVKEYANDQDKFFKDFSKAFEKLLENGITFPKDAPSPFIFKTLEEQGL

Source Source

Source organism organism	Saccharomyces cerevisiae
Common name common_name	;Baker's yeast ;
NCBI taxonomy ID ncbi_taxonomy_id	559292
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 polymer

Description description	Cytochrome c iso-1
Molecular weight formula_weight	12073.8 kDa
Mutation mutation	A81C, C102T
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

AEFKAGSAKKGATLFKTRCLQCHTVEKGGPHKVGPNLHGIFGRHSGQAEGYSYTDANIKKNVLWDENNMSEYLTNPKKYIPGTKMCFGGLKKEKDRNDLITYLKKATE

Source Source

Source organism organism	Saccharomyces cerevisiae
Common name common_name	;Baker's yeast ;
NCBI taxonomy ID ncbi_taxonomy_id	559292
Host organism host_organism	Escherichia coli

Entity 3 Entity 3 polymer

Description description	Cytochrome c iso-1
Molecular weight formula_weight	12073.8 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C

TEFKAGSAKKGATLFKTRCLQCHTVEKGGPHKVGPNLHGIFGRHSGQAEGYSYTDANIKKNVLWDENNMSEYLTNPKKYIPGTKMAFGGLKKEKDRNDLITYLKKACE

Source Source

Source organism organism	Saccharomyces cerevisiae
Common name common_name	;Baker's yeast ;
NCBI taxonomy ID ncbi_taxonomy_id	559292
Host organism host_organism	Escherichia coli

Entity 4 Entity 4 non-polymer

Description description	PROTOPORPHYRIN IX CONTAINING FE
Molecular weight formula_weight	616.5 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 5 Entity 5 non-polymer

Description description	HEME C
Molecular weight formula_weight	618.5 kDa
Source method src_method	syn
Copy count entity_count	2

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6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d2n18a_
Class class	a — All alpha proteins
Fold Fold fold	a.93 — Heme-dependent peroxidases
Superfamily Superfamily superfamily	a.93.1 — Heme-dependent peroxidases
Family Family family	a.93.1.1 — CCP-like

Domain ID domain_id	d2n18b1
Class class	a — All alpha proteins
Fold Fold fold	a.3 — Cytochrome c
Superfamily Superfamily superfamily	a.3.1 — Cytochrome c
Family Family family	a.3.1.1 — monodomain cytochrome c

Domain ID domain_id	d2n18b2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

Domain ID domain_id	d2n18c_
Class class	a — All alpha proteins
Fold Fold fold	a.3 — Cytochrome c
Superfamily Superfamily superfamily	a.3.1 — Cytochrome c
Family Family family	a.3.1.1 — monodomain cytochrome c

CATH v4.4 (4 domains)

Domain ID domain_id	2n18A01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	520 — Peroxidase; domain 1
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	2n18A02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	420 — Peroxidase; domain 2
Homologous superfamily homologous superfamily	10 — Peroxidase, domain 2

Domain ID domain_id	2n18B00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	760 — Cytochrome Bc1 Complex; Chain D, domain 2
Homologous superfamily homologous superfamily	10 — Cytochrome c-like domain

Domain ID domain_id	2n18C00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	760 — Cytochrome Bc1 Complex; Chain D, domain 2
Homologous superfamily homologous superfamily	10 — Cytochrome c-like domain

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Unit-cell length a length_a	1.000 Å
Unit-cell length b length_b	1.000 Å
Unit-cell length c length_c	1.000 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	1

Space group space_group	P 1
Space-group number int_tables_number	1
Crystal system crystal_system	—

Dominant form of the low-affinity complex of yeast cytochrome c and cytochrome c peroxidase

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

Cytochrome c peroxidase, mitochondrial

State in the Current Structure

Other States of the Same Protein in the Database

Cytochrome c iso-1

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

2n18__assembly_1__model_1

2n18__assembly_1__model_1 | I(q)

2n18__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

5. Entities and Polymers Entities & Polymers (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Source Source

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)

Dominant form of the low-affinity complex of yeast cytochrome c and cytochrome c peroxidase

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

Cytochrome c peroxidase, mitochondrial

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Cytochrome c iso-1

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

2n18__assembly_1__model_1

2n18__assembly_1__model_1 | I(q)

2n18__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

5. Entities and Polymers Entities & Polymers (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Source Source

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)