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3e3i

H. influenzae beta-carbonic anhydrase, variant G41A with 100 mM bicarbonate

Method: X-RAY DIFFRACTION
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1. Protein Identity and Related Structures Protein Identity & Related Structures

Carbonic anhydrase 2

Haemophilus influenzae

UniProt P45148

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein homooligomer Homooligomer Protein 4 ZINC ION × 4 SULFATE ION × 5 BICARBONATE ION × 3 water × 4 Consistent with protein count
2 Protein homooligomer Homooligomer Protein 4 ZINC ION × 4 SULFATE ION × 4 BICARBONATE ION × 4 water × 4 Consistent with protein count
3 Protein homooligomer Homooligomer Protein 4 ZINC ION × 4 SULFATE ION × 4 BICARBONATE ION × 4 water × 4 Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer
3e1v 3e1w 3e28 3e28 3e28

5 assemblies

Homotetramer
2a8c 2a8c 2a8d 2a8d 3e1v 3e1w 3e24 3e28 3e28 3e2a 3e2a 3e2w

26 assemblies; showing the first 12

Other homooligomers

None

Heteromeric or nucleic-acid complex

None

View Construct and Data Evidence
UniProt name CAN_HAEIN
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–229； UniProt 1–229 Author chain B； PDBConstruct 1–229； UniProt 1–229 Author chain C； PDBConstruct 1–229； UniProt 1–229 Author chain D； PDBConstruct 1–229； UniProt 1–229 Author chain E； PDBConstruct 1–229； UniProt 1–229 Author chain F； PDBConstruct 1–229； UniProt 1–229 Author chain G； PDBConstruct 1–229； UniProt 1–229 Author chain H； PDBConstruct 1–229； UniProt 1–229 Author chain I； PDBConstruct 1–229； UniProt 1–229 Author chain J； PDBConstruct 1–229； UniProt 1–229 Author chain K； PDBConstruct 1–229； UniProt 1–229 Author chain L； PDBConstruct 1–229； UniProt 1–229

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_id3e3i
Deposition date deposition_date2008-08-07
Structure title titleH. influenzae beta-carbonic anhydrase, variant G41A with 100 mM bicarbonate
Keywords keywordsbeta carbonic anhydrase, allosteric site mutant, Lyase, Metal-binding; LYASE
Experimental Method methodX-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.

3e3i__assembly_3__model_1

Assembly 3 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

3e3i__assembly_3__model_1 | I(q)

10-2 10-1 106 107 108 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

3e3i__assembly_3__model_1 | P(r) · Pending

The new assembly/model P(r) has not been calculated yet This placeholder does not display legacy data r (Angstrom) P(r)
P(r) will be calculated and displayed separately for the same assembly/model.
Rg（Guinier）27.92 Å
Rg (electron density)26.77 Å
Total Rg27.60 Å
Atom count6711
Residues830
Excluded volume119080 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 3e3i__assembly_1__model_1 tetrameric （4） Success 4.1.3-1-20251215 (887e7ef) View Download
2 1 3e3i__assembly_2__model_1 tetrameric （4） Success 4.1.3-1-20251215 (887e7ef) View Download
3 1 3e3i__assembly_3__model_1 tetrameric （4） 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)

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6. Fold Classification (SCOP + CATH) 24 domains

SCOP 2.08 (12 domains)

Domain ID domain_idd3e3ia_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.53 — Resolvase-like
Superfamily Superfamily superfamilyc.53.2 — beta-carbonic anhydrase, cab
Family Family familyc.53.2.1 — beta-carbonic anhydrase, cab
Domain ID domain_idd3e3ib_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.53 — Resolvase-like
Superfamily Superfamily superfamilyc.53.2 — beta-carbonic anhydrase, cab
Family Family familyc.53.2.1 — beta-carbonic anhydrase, cab
Domain ID domain_idd3e3ic_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.53 — Resolvase-like
Superfamily Superfamily superfamilyc.53.2 — beta-carbonic anhydrase, cab
Family Family familyc.53.2.1 — beta-carbonic anhydrase, cab
Domain ID domain_idd3e3id_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.53 — Resolvase-like
Superfamily Superfamily superfamilyc.53.2 — beta-carbonic anhydrase, cab
Family Family familyc.53.2.1 — beta-carbonic anhydrase, cab
Domain ID domain_idd3e3ie_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.53 — Resolvase-like
Superfamily Superfamily superfamilyc.53.2 — beta-carbonic anhydrase, cab
Family Family familyc.53.2.1 — beta-carbonic anhydrase, cab
Domain ID domain_idd3e3if_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.53 — Resolvase-like
Superfamily Superfamily superfamilyc.53.2 — beta-carbonic anhydrase, cab
Family Family familyc.53.2.1 — beta-carbonic anhydrase, cab
Domain ID domain_idd3e3ig_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.53 — Resolvase-like
Superfamily Superfamily superfamilyc.53.2 — beta-carbonic anhydrase, cab
Family Family familyc.53.2.1 — beta-carbonic anhydrase, cab
Domain ID domain_idd3e3ih_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.53 — Resolvase-like
Superfamily Superfamily superfamilyc.53.2 — beta-carbonic anhydrase, cab
Family Family familyc.53.2.1 — beta-carbonic anhydrase, cab
Domain ID domain_idd3e3ii_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.53 — Resolvase-like
Superfamily Superfamily superfamilyc.53.2 — beta-carbonic anhydrase, cab
Family Family familyc.53.2.1 — beta-carbonic anhydrase, cab
Domain ID domain_idd3e3ij_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.53 — Resolvase-like
Superfamily Superfamily superfamilyc.53.2 — beta-carbonic anhydrase, cab
Family Family familyc.53.2.1 — beta-carbonic anhydrase, cab
Domain ID domain_idd3e3ik_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.53 — Resolvase-like
Superfamily Superfamily superfamilyc.53.2 — beta-carbonic anhydrase, cab
Family Family familyc.53.2.1 — beta-carbonic anhydrase, cab
Domain ID domain_idd3e3il_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.53 — Resolvase-like
Superfamily Superfamily superfamilyc.53.2 — beta-carbonic anhydrase, cab
Family Family familyc.53.2.1 — beta-carbonic anhydrase, cab

CATH v4.4 (12 domains)

Domain ID domain_id3e3iA00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology1050 — Beta-carbonic Anhydrase; Chain A
Homologous superfamily homologous superfamily10 — Carbonic anhydrase
Domain ID domain_id3e3iB00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology1050 — Beta-carbonic Anhydrase; Chain A
Homologous superfamily homologous superfamily10 — Carbonic anhydrase
Domain ID domain_id3e3iC00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology1050 — Beta-carbonic Anhydrase; Chain A
Homologous superfamily homologous superfamily10 — Carbonic anhydrase
Domain ID domain_id3e3iD00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology1050 — Beta-carbonic Anhydrase; Chain A
Homologous superfamily homologous superfamily10 — Carbonic anhydrase
Domain ID domain_id3e3iE00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology1050 — Beta-carbonic Anhydrase; Chain A
Homologous superfamily homologous superfamily10 — Carbonic anhydrase
Domain ID domain_id3e3iF00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology1050 — Beta-carbonic Anhydrase; Chain A
Homologous superfamily homologous superfamily10 — Carbonic anhydrase
Domain ID domain_id3e3iG00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology1050 — Beta-carbonic Anhydrase; Chain A
Homologous superfamily homologous superfamily10 — Carbonic anhydrase
Domain ID domain_id3e3iH00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology1050 — Beta-carbonic Anhydrase; Chain A
Homologous superfamily homologous superfamily10 — Carbonic anhydrase
Domain ID domain_id3e3iI00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology1050 — Beta-carbonic Anhydrase; Chain A
Homologous superfamily homologous superfamily10 — Carbonic anhydrase
Domain ID domain_id3e3iJ00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology1050 — Beta-carbonic Anhydrase; Chain A
Homologous superfamily homologous superfamily10 — Carbonic anhydrase
Domain ID domain_id3e3iK00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology1050 — Beta-carbonic Anhydrase; Chain A
Homologous superfamily homologous superfamily10 — Carbonic anhydrase
Domain ID domain_id3e3iL00
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology1050 — Beta-carbonic Anhydrase; Chain A
Homologous superfamily homologous superfamily10 — Carbonic anhydrase
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7. Citations (1)