SAXSdb — 2ca4

▼

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

SULFITE\:CYTOCHROME C OXIDOREDUCTASE SUBUNIT A

STARKEYA NOVELLA

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 2	SULFITE\:CYTOCHROME C OXIDOREDUCTASE SUBUNIT B × 1 （Q9LA15） (MOLYBDOPTERIN-S,S)-OXO-MOLYBDENUM × 1 HEME C × 1 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q9LA16_THINO
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–373； UniProt 33–405

SULFITE\:CYTOCHROME C OXIDOREDUCTASE SUBUNIT B

STARKEYA NOVELLA

UniProt Q9LA15

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 2	SULFITE\:CYTOCHROME C OXIDOREDUCTASE SUBUNIT A × 1 （Q9LA16） (MOLYBDOPTERIN-S,S)-OXO-MOLYBDENUM × 1 HEME C × 1 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q9LA15_THINO
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–81； UniProt 28–108

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.

▼

2. Structure Basics 2. Structure Basics

Entry ID entry_id	2ca4
Deposition date deposition_date	2005-12-16
Structure title title	Sulfite dehydrogenase from Starkeya Novella mutant
Keywords keywords	SULFITE OXIDASE, MOLYBDOPTERIN, C-TYPE CYTOCHROME, HEME, MUTANT, OXIDOREDUCTASE; OXIDOREDUCTASE
Experimental Method method	X-RAY DIFFRACTION

▼

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.

2ca4__assembly_1__model_1

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

Download this curve (.dat)

2ca4__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2ca4__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	23.21 Å
Rg (electron density)	22.31 Å
Total Rg	23.24 Å
Atom count	3519
Residues	454
Excluded volume	62607 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2ca4__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download

▶

4. Crystallography and Experiment 4. Crystallography & Experiment

▶

5. Entities and Polymers Entities & Polymers (5)

Entity 1 Entity 1 polymer

Description description	SULFITE\:CYTOCHROME C OXIDOREDUCTASE SUBUNIT A
Molecular weight formula_weight	40127.6 kDa
Mutation mutation	YES
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	3909

ADTVTLPFANGERPLVMYPGKRPLIGLTARPPQLETPFSVFDEGLITPNDAFFVRYALAGIPLEIDPDAFRLEIKGKVGTPLSLSLQDLKNDFPASEVVAVNQCSGNSRGFVEPRVGGGQLANGAMGNARWRGVPLKAVLEKAGVQAGAKQVTFGGLDGPVIPETPDFVKALSIDHATDGEVMLAYSMNGADLPWLNGYPLRLVVPGYYGTYWVKHLNEITVIDKEFDGFWMKTAYRIPDNACACTEPGKAPTATIPINRFDVRSFITNVENGASVKAGEVPLRGIAFDGGYGITQVSVSADAGKSWTNATLDPGLGKYSFRGWKAVLPLTKGDHVLMCRATNARGETQPMQATWNPAGYMRNVVEATRVIAA

Source Source

Source organism organism	STARKEYA NOVELLA
NCBI taxonomy ID ncbi_taxonomy_id	921
Host organism host_organism	RHODOBACTER CAPSULATUS

Entity 2 Entity 2 polymer

Description description	SULFITE\:CYTOCHROME C OXIDOREDUCTASE SUBUNIT B
Molecular weight formula_weight	8844.8 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

APLTYELPDETAQLKPAPQPGFEAAQNNCAACHSVDYINTQPPGKGQAFWDAEVQKMIKVYHAPVDEADAKAIADYLAKTY

Source Source

Source organism organism	STARKEYA NOVELLA
NCBI taxonomy ID ncbi_taxonomy_id	921
Host organism host_organism	RHODOBACTER CAPSULATUS

Entity 3 Entity 3 non-polymer

Description description	(MOLYBDOPTERIN-S,S)-OXO-MOLYBDENUM
Molecular weight formula_weight	505.3 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 4 Entity 4 non-polymer

Description description	HEME C
Molecular weight formula_weight	618.5 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	379

▼

6. Fold Classification (SCOP + CATH) 3 domains

CATH v4.4 (3 domains)

Domain ID domain_id	2ca4A01
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	420 — Sulfite Oxidase; Chain A, domain 2
Homologous superfamily homologous superfamily	10 — Oxidoreductase, molybdopterin-binding domain

Domain ID domain_id	2ca4A02
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	650 —

Domain ID domain_id	2ca4B01
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

▶

Unit-cell length a length_a	96.445 Å
Unit-cell length b length_b	92.799 Å
Unit-cell length c length_c	55.817 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	4

Space group space_group	P 21 21 2
Space-group number int_tables_number	18
Crystal system crystal_system	—

Resolution resolution	2.100 Å
Low-resolution limit resolution_low	20.000 Å
R factor r_factor	0.1500
R_work r_work	0.1470
R_free r_free	0.1990

Sulfite dehydrogenase from Starkeya Novella mutant

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

SULFITE\:CYTOCHROME C OXIDOREDUCTASE SUBUNIT A

State in the Current Structure

Other States of the Same Protein in the Database

SULFITE\:CYTOCHROME C OXIDOREDUCTASE SUBUNIT B

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

2ca4__assembly_1__model_1

2ca4__assembly_1__model_1 | I(q)

2ca4__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 3 domains

CATH v4.4 (3 domains)

7. Citations (2)

Sulfite dehydrogenase from Starkeya Novella mutant

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

SULFITE\:CYTOCHROME C OXIDOREDUCTASE SUBUNIT A

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

SULFITE\:CYTOCHROME C OXIDOREDUCTASE SUBUNIT B

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

2ca4__assembly_1__model_1

2ca4__assembly_1__model_1 | I(q)

2ca4__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 3 domains

CATH v4.4 (3 domains)

7. Citations (2)