1c1u

RECRUITING ZINC TO MEDIATE POTENT, SPECIFIC INHIBITION OF SERINE PROTEASES

Method: X-RAY DIFFRACTION Dmax: 59.5 Å Quality: GOOD

1. Protein Identity and Related Structures Protein Identity & Related Structures

ALPHA THROMBIN

OrganismNot specified

UniProt P00734

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 3 PDB declaration: trimeric(3) Consistent with protein copy count Chain H; UniProt 364–622 Chain L; UniProt 328–363 Fragment:LIGHT CHAIN Fragment:HEAVY CHAIN ACETYL HIRUDIN × 1 (P28504) ZN ZINC ION × 1 NA SODIUM ION × 1 BAI (5-AMIDINO-2-BENZIMIDAZOLYL)(2-BENZIMIDAZOLYL)METHANE × 1 X-RAY DIFFRACTION X-ray crystallization conditions:pH 8.2;THROMBIN WAS PURCHASED FROM HAEMATOLOGIC TECHNOLOGIES, INC. AND ACETYL-HIRUDIN FROM BACHEM. THROMBIN WAS PREPARED AS DESCRIBED (SKRZPCZAK-JANKUN ET AL., 1991) .THROMBIN (1.0 MG/ML IN 50 MM HEPES, 50 % GLYCEROL, PH 7.0) WAS INCUBATED WITH 1.0 MM ACETYL-HIRUDIN, 1.0 MM HEMI-BABIM, 1.0 MM ZN+2 FOR 1 HR AT 4 DEG C. GLYCEROL WAS REMOVED AND THE COMPLEX CONCENTRATED WITH A CENTRICON 10 ( AMICON) TO 8.6 MG/ML AS DETERMINED BY THE BIORAD PROTEIN ASSAY KIT USING BOVINE SERUM ALBUMIN. CRYSTALS OF THROMBIN-ACETYL-HIRUDIN-HEMI-BABIM-ZN+2 WERE GROWN IN HANGING DROPS BY VAPOR DIFFUSION AFTER STREAK SEEDING. THE DROPS WERE MADE FROM 5 MICROLITERS OF COMPLEX AND 5 MICROLITERS OF RESERVOIR SOLUTION ( 0.10 M TRIS,0.50 M NACL, 22 % (BY VOLUME) PEG 4K, PH 8.20). Resolution 1.75 Å R-free 0.235

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

475 other PDB entries and 564 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name THRB_HUMAN
Isoform
PDB entities 1, 2
Chains and sequence ranges Author chain L; PDBConstruct 1–36; UniProt 328–363 Author chain H; PDBConstruct 1–253; UniProt 364–622

ACETYL HIRUDIN

OrganismNot specified

UniProt P28504

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein heterocomplex Heteromer Protein × 3 PDB declaration: trimeric(3) Consistent with protein copy count Chain I; UniProt 55–65 Non-standard monomer:Yes (specific site not provided by mmCIF) ALPHA THROMBIN × 1 (P00734) ALPHA THROMBIN × 1 (P00734) ZN ZINC ION × 1 NA SODIUM ION × 1 BAI (5-AMIDINO-2-BENZIMIDAZOLYL)(2-BENZIMIDAZOLYL)METHANE × 1 X-RAY DIFFRACTION X-ray crystallization conditions:pH 8.2;THROMBIN WAS PURCHASED FROM HAEMATOLOGIC TECHNOLOGIES, INC. AND ACETYL-HIRUDIN FROM BACHEM. THROMBIN WAS PREPARED AS DESCRIBED (SKRZPCZAK-JANKUN ET AL., 1991) .THROMBIN (1.0 MG/ML IN 50 MM HEPES, 50 % GLYCEROL, PH 7.0) WAS INCUBATED WITH 1.0 MM ACETYL-HIRUDIN, 1.0 MM HEMI-BABIM, 1.0 MM ZN+2 FOR 1 HR AT 4 DEG C. GLYCEROL WAS REMOVED AND THE COMPLEX CONCENTRATED WITH A CENTRICON 10 ( AMICON) TO 8.6 MG/ML AS DETERMINED BY THE BIORAD PROTEIN ASSAY KIT USING BOVINE SERUM ALBUMIN. CRYSTALS OF THROMBIN-ACETYL-HIRUDIN-HEMI-BABIM-ZN+2 WERE GROWN IN HANGING DROPS BY VAPOR DIFFUSION AFTER STREAK SEEDING. THE DROPS WERE MADE FROM 5 MICROLITERS OF COMPLEX AND 5 MICROLITERS OF RESERVOIR SOLUTION ( 0.10 M TRIS,0.50 M NACL, 22 % (BY VOLUME) PEG 4K, PH 8.20). Resolution 1.75 Å R-free 0.235

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

54 other PDB entries and 55 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name HIR2_HIRME
Isoform
PDB entities 3
Chains and sequence ranges Author chain I; PDBConstruct 1–11; UniProt 55–65

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.

SAXS scattering curve SAXS Profile

SAXS profile for 1c1u

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 1c1u
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2. Structure Basics 2. Structure Basics

Entry ID entry_id1c1u
Deposition date deposition_date1999-07-21
Structure title titleRECRUITING ZINC TO MEDIATE POTENT, SPECIFIC INHIBITION OF SERINE PROTEASES
Keywords keywords;ZN(II)-MEDIATED SERINE PROTEASE INHIBITORS, PH DEPENDENCE, ZN(II) AFFINITY STUCTURE-BASED DRUG DESIGN, SERINE PROTEASE/INHIBITOR, BLOOD CLOTTING-HYDROLASE INHIBITOR COMPLEX ;; BLOOD CLOTTING/HYDROLASE INHIBITOR
Experimental Method methodX-RAY DIFFRACTION

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier19.36
Radius of gyration Rg (electron density) rg_electron18.11
Forward intensity I(0) i021335500.00
Molecular weight molecular_weight34940.0 kDa
Excluded volume excluded_volume43567 ų
Envelope volume envelope_volume48781 ų
Hydration-shell volume shell_volume21571 ų
Envelope diameter envelope_diameter61.1
Shell Rg shell_rg25.42
Envelope Rg envelope_rg18.49
Shape Rg shape_rg18.11
Total Rg total_rg19.10
Total atoms total_atoms4844
Residues n_residues298
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 −1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax59.5
Rg (real space) rg_real19.20
Rg uncertainty (real space) rg_real_error0.23
I(0) (real space) i0_real2.1340e+07
I(0) uncertainty (real space) i0_real_error2.6060e+05
Rg (reciprocal space) rg_reciprocal19.22
I(0) (reciprocal space) i0_reciprocal21340000.0000
Solution quality estimate total_estimate0.8973
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary25.1
Skewness Skewness skewness0.103
Kurtosis Kurtosis kurtosis-0.434
Angular range angular_range— – 0.4100 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha8262000.0000
Real-space data points n_real_points72
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.894; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.983; Smooth: 0.996

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (7)

7. Fold Classification (SCOP + CATH) 3 domains

SCOP 2.08 (1 domains)

Domain ID domain_idd1c1u.1
Class classb — All beta proteins
Fold Fold foldb.47 — Trypsin-like serine proteases
Superfamily Superfamily superfamilyb.47.1 — Trypsin-like serine proteases
Family Family familyb.47.1.2 — Eukaryotic proteases

CATH v4.4 (2 domains)

Domain ID domain_id1c1uH01
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases
Domain ID domain_id1c1uH02
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases

8. Citations (1)

9. Files and Curves (10)