SAXSdb — 1ddz

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

CARBONIC ANHYDRASE

Porphyridium purpureum

State in the Current Structure

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

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q43060_9RHOD
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–496； UniProt 76–571 Author chain B； PDBConstruct 1–496； UniProt 76–571

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	1ddz
Deposition date deposition_date	1999-11-12
Structure title title	X-RAY STRUCTURE OF A BETA-CARBONIC ANHYDRASE FROM THE RED ALGA, PORPHYRIDIUM PURPUREUM R-1
Keywords keywords	ALPHA-BETA-ALPHA, LYASE; LYASE
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.

1ddz__assembly_1__model_1

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

Download this curve (.dat)

1ddz__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1ddz__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	28.52 Å
Rg (electron density)	27.48 Å
Total Rg	28.28 Å
Atom count	7488
Residues	962
Excluded volume	132470 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1ddz__assembly_1__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)

Entity 1 Entity 1 polymer

Description description	CARBONIC ANHYDRASE
Molecular weight formula_weight	54993.5 kDa
EC 编号 ec_number	4.2.1.1
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	8100

VKLAAGMGVMSDLEKKFIELEAKLVAQPAGQAMPGKSNIFANNEAWRQEMLKQDPEFFNRLANGQSPEYLWIGCADSRVPANQLLDLPAGEVFVHRNIANQCIHSDISFLSVLQYAVQYLKVKHILVCGHYGCGGAKAALGDSRLGLIDNWLRHIRDVRRMNAKYLDKCKDGDEELNRLIELNVLEQVHNVCATSIVQDAWDAGQELTVQGVVYGVGDGKLRDLGVVVNSSDDISKFYRTKSDSGALKAGNPNAPLVQVTKGGESELDSTMEKLTAELVQQTPGKLKEGANRVFVNNENWRQKMLKQDPQFFSNLAHTQTPEILWIGCADSRVPANQIINLPAGEVFVHRNIANQCIHSDMSFLSVLQYAVQYLKVKRVVVCGHYACGGCAAALGDSRLGLIDNWLRHIRDVRRHNQAELSRITDPKDSLNRLIEINVLEQMHNVCATSIVQDAWDAGQELEVQGVVYGVGDGKLRDMGVVAKANDDIGQIFRTKQ

Source Source

Source organism organism	Porphyridium purpureum
NCBI taxonomy ID ncbi_taxonomy_id	35688
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	612

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6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d1ddza1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.53 — Resolvase-like
Superfamily Superfamily superfamily	c.53.2 — beta-carbonic anhydrase, cab
Family Family family	c.53.2.1 — beta-carbonic anhydrase, cab

Domain ID domain_id	d1ddza2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.53 — Resolvase-like
Superfamily Superfamily superfamily	c.53.2 — beta-carbonic anhydrase, cab
Family Family family	c.53.2.1 — beta-carbonic anhydrase, cab

Domain ID domain_id	d1ddzb1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.53 — Resolvase-like
Superfamily Superfamily superfamily	c.53.2 — beta-carbonic anhydrase, cab
Family Family family	c.53.2.1 — beta-carbonic anhydrase, cab

Domain ID domain_id	d1ddzb2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.53 — Resolvase-like
Superfamily Superfamily superfamily	c.53.2 — beta-carbonic anhydrase, cab
Family Family family	c.53.2.1 — beta-carbonic anhydrase, cab

CATH v4.4 (4 domains)

Domain ID domain_id	1ddzA01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	1050 — Beta-carbonic Anhydrase; Chain A
Homologous superfamily homologous superfamily	10 — Carbonic anhydrase

Domain ID domain_id	1ddzA02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	1050 — Beta-carbonic Anhydrase; Chain A
Homologous superfamily homologous superfamily	10 — Carbonic anhydrase

Domain ID domain_id	1ddzB01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	1050 — Beta-carbonic Anhydrase; Chain A
Homologous superfamily homologous superfamily	10 — Carbonic anhydrase

Domain ID domain_id	1ddzB02
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	1050 — Beta-carbonic Anhydrase; Chain A
Homologous superfamily homologous superfamily	10 — Carbonic anhydrase

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Unit-cell length a length_a	63.500 Å
Unit-cell length b length_b	112.800 Å
Unit-cell length c length_c	73.200 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	103.60 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	2.200 Å
Low-resolution limit resolution_low	10.000 Å
R factor r_factor	0.2080
R_work r_work	0.2080
R_free r_free	0.2740

X-RAY STRUCTURE OF A BETA-CARBONIC ANHYDRASE FROM THE RED ALGA, PORPHYRIDIUM PURPUREUM R-1

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

CARBONIC ANHYDRASE

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

1ddz__assembly_1__model_1

1ddz__assembly_1__model_1 | I(q)

1ddz__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

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)

X-RAY STRUCTURE OF A BETA-CARBONIC ANHYDRASE FROM THE RED ALGA, PORPHYRIDIUM PURPUREUM R-1

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

CARBONIC ANHYDRASE

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

1ddz__assembly_1__model_1

1ddz__assembly_1__model_1 | I(q)

1ddz__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

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)