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1qbb

BACTERIAL CHITOBIASE COMPLEXED WITH CHITOBIOSE (DINAG)

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

CHITOBIASE

Serratia marcescens

UniProt Q54468

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Other combination Monomer Protein 1 其他Polymer 1 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 SULFATE ION × 4 water × 1 Consistent with protein count

Other States of the Same Protein in the Database

Monomer
1qba

1 assemblies

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
1c7s 1c7t 1qbb

3 assemblies

View Construct and Data Evidence
UniProt name CHB_SERMA
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–858； UniProt 28–885

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_id1qbb
Deposition date deposition_date1996-06-07
Structure title titleBACTERIAL CHITOBIASE COMPLEXED WITH CHITOBIOSE (DINAG)
Keywords keywordsGLYCOSYL HYDROLASE, CHITOBIASE, CHITINOLYSIS, BA8-BARREL; GLYCOSYL HYDROLASE
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.

1qbb__assembly_1__model_1

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

Download this curve (.dat)

1qbb__assembly_1__model_1 | I(q)

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

1qbb__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）28.70 Å
Rg (electron density)27.74 Å
Total Rg28.69 Å
Atom count13316
Residues858
Excluded volume120190 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 1qbb__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 (4)

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6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_idd1qbba1
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.18 — E set domains
Family Family familyb.1.18.2 — E-set domains of sugar-utilizing enzymes
Domain ID domain_idd1qbba2
Class classb — All beta proteins
Fold Fold foldb.2 — Common fold of diphtheria toxin/transcription factors/cytochrome f
Superfamily Superfamily superfamilyb.2.2 — Carbohydrate-binding domain
Family Family familyb.2.2.3 — Bacterial chitobiase, n-terminal domain
Domain ID domain_idd1qbba3
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.1 — TIM beta/alpha-barrel
Superfamily Superfamily superfamilyc.1.8 — (Trans)glycosidases
Family Family familyc.1.8.6 — beta-N-acetylhexosaminidase catalytic domain
Domain ID domain_idd1qbba4
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.92 — Zincin-like
Superfamily Superfamily superfamilyd.92.2 — beta-N-acetylhexosaminidase-like domain
Family Family familyd.92.2.1 — beta-N-acetylhexosaminidase domain

CATH v4.4 (4 domains)

Domain ID domain_id1qbbA01
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily290 —
Domain ID domain_id1qbbA02
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology379 — Chitobiase; domain 2
Homologous superfamily homologous superfamily10 — Chitobiase/beta-hexosaminidase domain 2-like
Domain ID domain_id1qbbA03
Class class3 — Alpha Beta
Architecture architecture20 — Alpha-Beta Barrel
Topology topology20 — TIM Barrel
Homologous superfamily homologous superfamily80 — Glycosidases
Domain ID domain_id1qbbA04
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins
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7. Citations (5)