2ddi
NMR structure of the second Kunitz domain of human WFIKKN1
1. Protein Identity and Related Structures Protein Identity & Related Structures
No usable UniProt protein identity is available for this entry.
The relationship tables retain this entry's assembly and composition data, but cross-PDB links for the same protein cannot be established reliably without a unified protein identity.
Assembly Composition of the Current Entry
| Assembly | Physical composition | Protein state | 蛋白 / DNA / RNA / 其他Polymer | Data consistency |
|---|---|---|---|---|
| 1 | Protein monomer | Monomer | 1 / 0 / 0 / 0 | Consistent with protein count |
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.
2. Structure Basics 2. Structure Basics
| Entry ID entry_id | 2ddi |
| Deposition date deposition_date | 2006-01-30 |
| Structure title title | NMR structure of the second Kunitz domain of human WFIKKN1 |
| Keywords keywords | Kunitz domain, PROTEIN BINDING; PROTEIN BINDING |
| Experimental Method method | SOLUTION NMR |
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.
2ddi__assembly_1__model_3
Assembly 1 · Model 3 · CRYSOL 4.1.3-1-20251215 (887e7ef)
2ddi__assembly_1__model_3 | I(q)
2ddi__assembly_1__model_3 | P(r) · Pending
| Rg（Guinier） | 13.73 Å |
| Rg (electron density) | 13.06 Å |
| Total Rg | 13.96 Å |
| Atom count | 1033 |
| Residues | 70 |
| Excluded volume | 9391 ų |
| Maximum q | 0.500 Å⁻¹ |
| Assembly | Model | Structure unit | Oligomeric description | Status | CRYSOL | Actions |
|---|---|---|---|---|---|---|
| 1 | 1 | 2ddi__assembly_1__model_1 |
monomeric （1） | Success | 4.1.3-1-20251215 (887e7ef) | View Download |
| 1 | 2 | 2ddi__assembly_1__model_2 |
monomeric （1） | Success | 4.1.3-1-20251215 (887e7ef) | View Download |
| 1 | 3 | 2ddi__assembly_1__model_3 |
monomeric （1） | Success | 4.1.3-1-20251215 (887e7ef) | View Download |
| 1 | 4 | 2ddi__assembly_1__model_4 |
monomeric （1） | Success | 4.1.3-1-20251215 (887e7ef) | View Download |
| 1 | 5 | 2ddi__assembly_1__model_5 |
monomeric （1） | Success | 4.1.3-1-20251215 (887e7ef) | View Download |
| 1 | 6 | 2ddi__assembly_1__model_6 |
monomeric （1） | Success | 4.1.3-1-20251215 (887e7ef) | View Download |
| 1 | 7 | 2ddi__assembly_1__model_7 |
monomeric （1） | Success | 4.1.3-1-20251215 (887e7ef) | View Download |
| 1 | 8 | 2ddi__assembly_1__model_8 |
monomeric （1） | Success | 4.1.3-1-20251215 (887e7ef) | View Download |
| 1 | 9 | 2ddi__assembly_1__model_9 |
monomeric （1） | Success | 4.1.3-1-20251215 (887e7ef) | View Download |
| 1 | 10 | 2ddi__assembly_1__model_10 |
monomeric （1） | Success | 4.1.3-1-20251215 (887e7ef) | View Download |
| 1 | 11 | 2ddi__assembly_1__model_11 |
monomeric （1） | Success | 4.1.3-1-20251215 (887e7ef) | View Download |
| 1 | 12 | 2ddi__assembly_1__model_12 |
monomeric （1） | Success | 4.1.3-1-20251215 (887e7ef) | View Download |
| 1 | 13 | 2ddi__assembly_1__model_13 |
monomeric （1） | Success | 4.1.3-1-20251215 (887e7ef) | View Download |
| 1 | 14 | 2ddi__assembly_1__model_14 |
monomeric （1） | Success | 4.1.3-1-20251215 (887e7ef) | View Download |
| 1 | 15 | 2ddi__assembly_1__model_15 |
monomeric （1） | Success | 4.1.3-1-20251215 (887e7ef) | View Download |
| 1 | 16 | 2ddi__assembly_1__model_16 |
monomeric （1） | Success | 4.1.3-1-20251215 (887e7ef) | View Download |
| 1 | 17 | 2ddi__assembly_1__model_17 |
monomeric （1） | Success | 4.1.3-1-20251215 (887e7ef) | View Download |
| 1 | 18 | 2ddi__assembly_1__model_18 |
monomeric （1） | Success | 4.1.3-1-20251215 (887e7ef) | View Download |
| 1 | 19 | 2ddi__assembly_1__model_19 |
monomeric （1） | Success | 4.1.3-1-20251215 (887e7ef) | View Download |
| 1 | 20 | 2ddi__assembly_1__model_20 |
monomeric （1） | Success | 4.1.3-1-20251215 (887e7ef) | View Download |
4. Crystallography and Experiment 4. Crystallography & Experiment
5. Entities and Polymers Entities & Polymers (1)
6. Fold Classification (SCOP + CATH) 4 domains
SCOP 2.08 (3 domains)
| Domain ID domain_id | d2ddia1 |
| Class class | g — Small proteins |
| Fold Fold fold | g.8 — BPTI-like |
| Superfamily Superfamily superfamily | g.8.1 — BPTI-like |
| Family Family family | g.8.1.0 — automated matches |
| Domain ID domain_id | d2ddia2 |
| Class class | l — Artifacts |
| Fold Fold fold | l.1 — Tags |
| Superfamily Superfamily superfamily | l.1.1 — Tags |
| Family Family family | l.1.1.1 — Tags |
| Domain ID domain_id | d2ddia3 |
| Class class | l — Artifacts |
| Fold Fold fold | l.1 — Tags |
| Superfamily Superfamily superfamily | l.1.1 — Tags |
| Family Family family | l.1.1.1 — Tags |
CATH v4.4 (1 domains)
| Domain ID domain_id | 2ddiA00 |
| Class class | 4 — Few Secondary Structures |
| Architecture architecture | 10 — Irregular |
| Topology topology | 410 — Factor Xa Inhibitor |
| Homologous superfamily homologous superfamily | 10 — Pancreatic trypsin inhibitor Kunitz domain |