SAXSdb — 6qfw

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

Carbonic anhydrase 2

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	;4-[3-(8-chloranyl-2',3',4',5',6'-pentamethyl-4-oxidanyl-7-oxidanylidene-spiro[1$l^{4},8$l^{4}-diaza-9$l^{7}-iridabicyclo[4.3.0]nona-1,3,5-triene-9,1'-1$l^{7}-iridapentacyclo[2.2.0.0^{1,3}.0^{1,5}.0^{2,6}]hexane]-8-yl)propyl]benzenesulfonamide ; × 1 ZINC ION × 1 SULFATE ION × 1 IRIDIUM ION × 1 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CAH2_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 3–260； UniProt 3–260

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	6qfw
Deposition date deposition_date	2019-01-10
Structure title title	Human carbonic anhydrase II with bound IrCp* complex (cofactor 9) to generate an artificial transfer hydrogenase (ATHase)
Keywords keywords	Artificial Transfer Hydrogenase, bound IrCp* complex, zinc binding protein, human carbonic anhydrase II, OXIDOREDUCTASE; OXIDOREDUCTASE
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.

6qfw__assembly_1__model_1

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

Download this curve (.dat)

6qfw__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

6qfw__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	18.54 Å
Rg (electron density)	17.23 Å
Total Rg	18.37 Å
Atom count	2081
Residues	256
Excluded volume	36987 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`6qfw__assembly_1__model_1`	monomeric （1）	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 (6)

Entity 1 Entity 1 polymer

Description description	Carbonic anhydrase 2
Molecular weight formula_weight	29273.1 kDa
EC 编号 ec_number	4.2.1.1
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	2440

MAHHWGYGKHNGPEHWHKDFPIAKGERQSPVDIDTHTAKYDPSLKPLSVSYDQATSLRILNNGHAFNVEFDDSQDKAVLKGGPLDGTYRLIQFHFHWGSLDGQGSEHTVDKKKYAAELHLVHWNTKYGDFGKAVQQPDGLAVLGIFLKVGSAKPGLQKVVDVLDSIKTKGKSADFTNFDPRGLLPESLDYWTYPGSLTTPPLLECVTWIVLKEPISVSSEQVLKFRKLNFNGEGEPEELMVDNWRPAQPLKNRQIKASFK

Source Source

Source organism organism	Homo sapiens
Common name common_name	Human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	;4-[3-(8-chloranyl-2',3',4',5',6'-pentamethyl-4-oxidanyl-7-oxidanylidene-spiro[1$l^{4},8$l^{4}-diaza-9$l^{7}-iridabicyclo[4.3.0]nona-1,3,5-triene-9,1'-1$l^{7}-iridapentacyclo[2.2.0.0^{1,3}.0^{1,5}.0^{2,6}]hexane]-8-yl)propyl]benzenesulfonamide ;
Molecular weight formula_weight	697.3 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 3 Entity 3 non-polymer

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 4 Entity 4 non-polymer

Description description	SULFATE ION
Molecular weight formula_weight	96.1 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 5 Entity 5 non-polymer

Description description	IRIDIUM ION
Molecular weight formula_weight	192.2 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 6 Entity 6 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	267

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6. Fold Classification (SCOP + CATH) 1 domains

SCOP 2.08 (1 domains)

Domain ID domain_id	d6qfwa_
Class class	b — All beta proteins
Fold Fold fold	b.74 — Carbonic anhydrase
Superfamily Superfamily superfamily	b.74.1 — Carbonic anhydrase
Family Family family	b.74.1.1 — Carbonic anhydrase

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Unit-cell length a length_a	42.232 Å
Unit-cell length b length_b	41.441 Å
Unit-cell length c length_c	72.374 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	104.36 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	2

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

Resolution resolution	1.200 Å
Low-resolution limit resolution_low	40.950 Å
R factor r_factor	0.1630
R_work r_work	0.1622
R_free r_free	0.1784

Human carbonic anhydrase II with bound IrCp* complex (cofactor 9) to generate an artificial transfer hydrogenase (ATHase)

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

Carbonic anhydrase 2

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

6qfw__assembly_1__model_1

6qfw__assembly_1__model_1 | I(q)

6qfw__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 (6)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 1 domains

SCOP 2.08 (1 domains)

7. Citations (1)

Human carbonic anhydrase II with bound IrCp* complex (cofactor 9) to generate an artificial transfer hydrogenase (ATHase)

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

Carbonic anhydrase 2

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

6qfw__assembly_1__model_1

6qfw__assembly_1__model_1 | I(q)

6qfw__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 (6)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 1 domains

SCOP 2.08 (1 domains)

7. Citations (1)