2fw4

Carbonic anhydrase activators. The first X-ray crystallographic study of an activator of isoform I, structure with L-histidine.

Method: X-RAY DIFFRACTION Dmax: 103.7 Å Quality: GOOD

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

Carbonic anhydrase 1

OrganismNot specified

UniProt P00915

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein monomer Monomer Protein × 1 PDB declaration: monomeric(1) Consistent with protein copy count Chain A; UniProt 1–260 Not recorded ZN ZINC ION × 1 HIS HISTIDINE × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 9;298 K;25% PEG 4000, 0.1M Tris.HCl, 10% Ethylene glycol, pH 9.0, VAPOR DIFFUSION, HANGING DROP, temperature 298.0K Resolution 2.00 Å R-free 0.303
2 Protein monomer Monomer Protein × 1 PDB declaration: monomeric(1) Consistent with protein copy count Chain B; UniProt 1–260 Not recorded ZN ZINC ION × 1 HIS HISTIDINE × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 9;298 K;25% PEG 4000, 0.1M Tris.HCl, 10% Ethylene glycol, pH 9.0, VAPOR DIFFUSION, HANGING DROP, temperature 298.0K Resolution 2.00 Å R-free 0.303

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

55 other PDB entries and 100 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name CAH1_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–260; UniProt 1–260 Author chain B; PDBConstruct 1–260; UniProt 1–260

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.

SAXS scattering curve SAXS Profile

SAXS profile for 2fw4

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 2fw4
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2. Structure Basics 2. Structure Basics

Entry ID entry_id2fw4
Deposition date deposition_date2006-02-01
Structure title titleCarbonic anhydrase activators. The first X-ray crystallographic study of an activator of isoform I, structure with L-histidine.
Keywords keywordscarbonic anhydrase I, activators, LYASE; LYASE
Experimental Method methodX-RAY DIFFRACTION

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier31.68
Radius of gyration Rg (electron density) rg_electron31.40
Forward intensity I(0) i053956500.00
Molecular weight molecular_weight57291.0 kDa
Excluded volume excluded_volume71197 ų
Envelope volume envelope_volume89418 ų
Hydration-shell volume shell_volume24303 ų
Envelope diameter envelope_diameter107.2
Shell Rg shell_rg37.37
Envelope Rg envelope_rg31.07
Shape Rg shape_rg31.38
Total Rg total_rg31.97
Total atoms total_atoms4048
Residues n_residues513
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 −1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax103.7
Rg (real space) rg_real31.97
Rg uncertainty (real space) rg_real_error1.29
I(0) (real space) i0_real5.3960e+07
I(0) uncertainty (real space) i0_real_error8.5180e+05
Rg (reciprocal space) rg_reciprocal31.85
I(0) (reciprocal space) i0_reciprocal53950000.0000
Solution quality estimate total_estimate0.7695
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary24.9
Skewness Skewness skewness0.369
Kurtosis Kurtosis kurtosis-0.851
Angular range angular_range— – 0.2500 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha12420000.0000
Real-space data points n_real_points51
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.481; Stabil: 0.999; Sysdev: 1.000; Positv: 1.000; Valcen: 0.642; Smooth: 0.918

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (4)

7. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd2fw4a_
Class classb — All beta proteins
Fold Fold foldb.74 — Carbonic anhydrase
Superfamily Superfamily superfamilyb.74.1 — Carbonic anhydrase
Family Family familyb.74.1.1 — Carbonic anhydrase
Domain ID domain_idd2fw4b_
Class classb — All beta proteins
Fold Fold foldb.74 — Carbonic anhydrase
Superfamily Superfamily superfamilyb.74.1 — Carbonic anhydrase
Family Family familyb.74.1.1 — Carbonic anhydrase

CATH v4.4 (2 domains)

Domain ID domain_id2fw4A00
Class class3 — Alpha Beta
Architecture architecture10 — Roll
Topology topology200 — Carbonic Anhydrase II
Homologous superfamily homologous superfamily10 — Alpha carbonic anhydrase
Domain ID domain_id2fw4B00
Class class3 — Alpha Beta
Architecture architecture10 — Roll
Topology topology200 — Carbonic Anhydrase II
Homologous superfamily homologous superfamily10 — Alpha carbonic anhydrase

8. Citations (1)

9. Files and Curves (10)