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4al9

Crystal structure of the lectin PA-IL from Pseudomonas aeruginoas in complex with melibiose

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

PA-I GALACTOPHILIC LECTIN

PSEUDOMONAS AERUGINOSA

UniProt Q05097

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein homooligomer Homooligomer Protein 4 CALCIUM ION × 4 alpha-D-galactopyranose × 4 1,2-ETHANEDIOL × 2 water × 4 Consistent with protein count
2 Other combination Homooligomer Protein 4 其他Polymer 2 alpha-D-galactopyranose-(1-6)-alpha-D-glucopyranose × 2 CALCIUM ION × 4 alpha-D-galactopyranose × 2 1,2-ETHANEDIOL × 3 water × 4 Consistent with protein count

Other States of the Same Protein in the Database

Monomer
3zyb 3zyb 3zyb 3zyb 3zyb 4cp9 4cp9 4cp9 4cp9 4yw7 4yw7 4yw7

25 assemblies; showing the first 12

Homodimer
3zyf 3zyf 3zyh 4a6s 4a6s 4cpb 4cpb 4lk7 4lk7 6yoh 6yoh

11 assemblies

Homotetramer
1l7l 1oko 1uoj 4al9 4cp9 4cpb 4ljh 4lk6 4lk6 4lk6 4lk7 4yw6

26 assemblies; showing the first 12

Other homooligomers

None

Heteromeric or nucleic-acid complex
2vxj 2vxj 2vxj 2vxj 2vxj 2vxj 2vxj 2vxj 2vxj 2vxj 2vxj 2vxj

40 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name PA1L_PSEAE
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–121； UniProt 2–122 Author chain B； PDBConstruct 1–121； UniProt 2–122 Author chain C； PDBConstruct 1–121； UniProt 2–122 Author chain D； PDBConstruct 1–121； UniProt 2–122 Author chain E； PDBConstruct 1–121； UniProt 2–122 Author chain F； PDBConstruct 1–121； UniProt 2–122 Author chain G； PDBConstruct 1–121； UniProt 2–122 Author chain H； PDBConstruct 1–121； UniProt 2–122

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_id4al9
Deposition date deposition_date2012-03-02
Structure title titleCrystal structure of the lectin PA-IL from Pseudomonas aeruginoas in complex with melibiose
Keywords keywordsSUGAR BINDING PROTEIN, GALACTOSE BINDING PROTEIN; SUGAR BINDING PROTEIN
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.

4al9__assembly_1__model_1

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

Download this curve (.dat)

4al9__assembly_1__model_1 | I(q)

10-2 10-1 105 106 107 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

4al9__assembly_1__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）28.32 Å
Rg (electron density)27.42 Å
Total Rg27.98 Å
Atom count3664
Residues484
Excluded volume64499 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 4al9__assembly_1__model_1 tetrameric （4） Success 4.1.3-1-20251215 (887e7ef) View Download
2 1 4al9__assembly_2__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 (6)

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6. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

Domain ID domain_idd4al9a_
Class classb — All beta proteins
Fold Fold foldb.18 — Galactose-binding domain-like
Superfamily Superfamily superfamilyb.18.1 — Galactose-binding domain-like
Family Family familyb.18.1.16 — PA-IL, galactose-binding lectin 1
Domain ID domain_idd4al9b_
Class classb — All beta proteins
Fold Fold foldb.18 — Galactose-binding domain-like
Superfamily Superfamily superfamilyb.18.1 — Galactose-binding domain-like
Family Family familyb.18.1.16 — PA-IL, galactose-binding lectin 1
Domain ID domain_idd4al9c_
Class classb — All beta proteins
Fold Fold foldb.18 — Galactose-binding domain-like
Superfamily Superfamily superfamilyb.18.1 — Galactose-binding domain-like
Family Family familyb.18.1.16 — PA-IL, galactose-binding lectin 1
Domain ID domain_idd4al9d_
Class classb — All beta proteins
Fold Fold foldb.18 — Galactose-binding domain-like
Superfamily Superfamily superfamilyb.18.1 — Galactose-binding domain-like
Family Family familyb.18.1.16 — PA-IL, galactose-binding lectin 1
Domain ID domain_idd4al9e_
Class classb — All beta proteins
Fold Fold foldb.18 — Galactose-binding domain-like
Superfamily Superfamily superfamilyb.18.1 — Galactose-binding domain-like
Family Family familyb.18.1.16 — PA-IL, galactose-binding lectin 1
Domain ID domain_idd4al9f_
Class classb — All beta proteins
Fold Fold foldb.18 — Galactose-binding domain-like
Superfamily Superfamily superfamilyb.18.1 — Galactose-binding domain-like
Family Family familyb.18.1.16 — PA-IL, galactose-binding lectin 1
Domain ID domain_idd4al9g_
Class classb — All beta proteins
Fold Fold foldb.18 — Galactose-binding domain-like
Superfamily Superfamily superfamilyb.18.1 — Galactose-binding domain-like
Family Family familyb.18.1.16 — PA-IL, galactose-binding lectin 1
Domain ID domain_idd4al9h_
Class classb — All beta proteins
Fold Fold foldb.18 — Galactose-binding domain-like
Superfamily Superfamily superfamilyb.18.1 — Galactose-binding domain-like
Family Family familyb.18.1.16 — PA-IL, galactose-binding lectin 1

CATH v4.4 (8 domains)

Domain ID domain_id4al9A00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology120 — Jelly Rolls
Homologous superfamily homologous superfamily430 — Galactose-binding lectin
Domain ID domain_id4al9B00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology120 — Jelly Rolls
Homologous superfamily homologous superfamily430 — Galactose-binding lectin
Domain ID domain_id4al9C00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology120 — Jelly Rolls
Homologous superfamily homologous superfamily430 — Galactose-binding lectin
Domain ID domain_id4al9D00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology120 — Jelly Rolls
Homologous superfamily homologous superfamily430 — Galactose-binding lectin
Domain ID domain_id4al9E00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology120 — Jelly Rolls
Homologous superfamily homologous superfamily430 — Galactose-binding lectin
Domain ID domain_id4al9F00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology120 — Jelly Rolls
Homologous superfamily homologous superfamily430 — Galactose-binding lectin
Domain ID domain_id4al9G00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology120 — Jelly Rolls
Homologous superfamily homologous superfamily430 — Galactose-binding lectin
Domain ID domain_id4al9H00
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology120 — Jelly Rolls
Homologous superfamily homologous superfamily430 — Galactose-binding lectin
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7. Citations (1)