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1bi6

NMR STRUCTURE OF BROMELAIN INHIBITOR VI FROM PINEAPPLE STEM

Method: SOLUTION NMR
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1. Protein Identity and Related Structures Protein Identity & Related Structures

BROMELAIN INHIBITOR VI

OrganismNot specified

UniProt P27478

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein homooligomer Homooligomer Protein 2 No other associated polymer Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer
1bi6 2bi6

2 assemblies

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex

None

View Construct and Data Evidence
UniProt name IBR2_ANACO
Isoform —
PDB entities 1, 2
Chains and sequence ranges Author chain L； PDBConstruct 1–11； UniProt 1–11 Author chain H； PDBConstruct 1–41； UniProt 12–52

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_id1bi6
Deposition date deposition_date1995-12-07
Structure title titleNMR STRUCTURE OF BROMELAIN INHIBITOR VI FROM PINEAPPLE STEM
Keywords keywordsCYSTEINE PROTEASE INHIBITOR; CYSTEINE PROTEASE INHIBITOR
Experimental Method methodSOLUTION NMR
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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.

1bi6__assembly_1__model_1

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

Download this curve (.dat)

1bi6__assembly_1__model_1 | I(q)

10-2 10-1 104 105 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

1bi6__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）11.93 Å
Rg (electron density)11.06 Å
Total Rg12.23 Å
Atom count778
Residues52
Excluded volume7193 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 1bi6__assembly_1__model_1 dimeric （2） 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 (2)

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6. Fold Classification (SCOP + CATH) 3 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd1bi6.2
Class classg — Small proteins
Fold Fold foldg.3 — Knottins (small inhibitors, toxins, lectins)
Superfamily Superfamily superfamilyg.3.12 — Bromelain inhibitor VI (cysteine protease inhibitor)
Family Family familyg.3.12.1 — Bromelain inhibitor VI (cysteine protease inhibitor)
Domain ID domain_idd1bi6h1
Class classg — Small proteins
Fold Fold foldg.3 — Knottins (small inhibitors, toxins, lectins)
Superfamily Superfamily superfamilyg.3.12 — Bromelain inhibitor VI (cysteine protease inhibitor)
Family Family familyg.3.12.1 — Bromelain inhibitor VI (cysteine protease inhibitor)

CATH v4.4 (1 domains)

Domain ID domain_id1bi6H00
Class class2 — Mainly Beta
Architecture architecture10 — Ribbon
Topology topology69 — Cysteine Protease (Bromelain) Inhibitor, subunit H
Homologous superfamily homologous superfamily10 — Cysteine Protease (Bromelain) Inhibitor, subunit H
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7. Citations (2)