2b5t

2.1 Angstrom structure of a nonproductive complex between antithrombin, synthetic heparin mimetic SR123781 and two S195A thrombin molecules

Method: X-RAY DIFFRACTION Dmax: 127.7 Å Quality: GOOD

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

Thrombin

Homo sapiens

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 Other combination Heteromer Protein × 5 其他Polymer 5 PDB declaration: pentameric(5) Consistent with protein copy count Chain A; UniProt 315–363 Chain B; UniProt 364–622 Chain C; UniProt 315–363 Chain D; UniProt 364–622 Fragment:thrombin light chain Fragment:thrombin heavy chain, serine protease Mutation:S195A Antithrombin-III × 1 (P01008) alpha-L-fucopyranose-(1-6)-2-acetamido-2-deoxy-beta-D-glucopyranose × 2 ;2,3,4,6-tetra-O-sulfonato-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-sulfo-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-sulfonato-beta-D-glucopyranose-(1-4)-2,3-di-O-methyl-6-O-sulfonato-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-beta-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-beta-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-beta-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-beta-D-glucopyranose-(1-4)-2,3-di-O-methyl-6-O-sulfonato-alpha-D-glucopyranose-(1-4)-2,3-di-O-methyl-beta-D-glucopyranuronic acid-(1-4)-2,3,6-tri-O-sulfo-alpha-D-glucopyranose-(1-4)-2,3-di-O-methyl-alpha-L-idopyranuronic acid-(1-4)-methyl 3-O-methyl-2,6-di-O-sulfo-alpha-D-glucopyranoside ; × 1 ;alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose ; × 1 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 GOL GLYCEROL × 12 SO4 SULFATE ION × 6 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.4;294 K;PEG3350, glycerol, ammonium sulfate, (crystallized with NaCl and tris, but not in cryoprotectant), pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 294K Resolution 2.10 Å R-free 0.247
2 Other combination Heteromer Protein × 5 其他Polymer 5 PDB declaration: pentameric(5) Consistent with protein copy count Chain A; UniProt 315–363 Chain B; UniProt 364–622 Chain C; UniProt 315–363 Chain D; UniProt 364–622 Fragment:thrombin light chain Fragment:thrombin heavy chain, serine protease Mutation:S195A Antithrombin-III × 1 (P01008) alpha-L-fucopyranose-(1-6)-2-acetamido-2-deoxy-beta-D-glucopyranose × 2 ;2,3,4,6-tetra-O-sulfonato-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-sulfo-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-sulfonato-beta-D-glucopyranose-(1-4)-2,3-di-O-methyl-6-O-sulfonato-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-beta-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-beta-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-beta-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-beta-D-glucopyranose-(1-4)-2,3-di-O-methyl-6-O-sulfonato-alpha-D-glucopyranose-(1-4)-2,3-di-O-methyl-beta-D-glucopyranuronic acid-(1-4)-2,3,6-tri-O-sulfo-alpha-D-glucopyranose-(1-4)-2,3-di-O-methyl-alpha-L-idopyranuronic acid-(1-4)-methyl 3-O-methyl-2,6-di-O-sulfo-alpha-D-glucopyranoside ; × 1 ;alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose ; × 1 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 GOL GLYCEROL × 12 SO4 SULFATE ION × 6 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.4;294 K;PEG3350, glycerol, ammonium sulfate, (crystallized with NaCl and tris, but not in cryoprotectant), pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 294K Resolution 2.10 Å R-free 0.247

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 563 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 A; PDBConstruct 1–49; UniProt 315–363 Author chain C; PDBConstruct 1–49; UniProt 315–363 Author chain B; PDBConstruct 1–259; UniProt 364–622 Author chain D; PDBConstruct 1–259; UniProt 364–622

Antithrombin-III

Homo sapiens

UniProt P01008

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Other combination Heteromer Protein × 5 其他Polymer 5 PDB declaration: pentameric(5) Consistent with protein copy count Chain I; UniProt 33–464 Mutation:I15M, S137A, V317C, T401C Thrombin × 2 (P00734) Thrombin × 2 (P00734) alpha-L-fucopyranose-(1-6)-2-acetamido-2-deoxy-beta-D-glucopyranose × 2 ;2,3,4,6-tetra-O-sulfonato-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-sulfo-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-sulfonato-beta-D-glucopyranose-(1-4)-2,3-di-O-methyl-6-O-sulfonato-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-beta-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-beta-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-beta-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-beta-D-glucopyranose-(1-4)-2,3-di-O-methyl-6-O-sulfonato-alpha-D-glucopyranose-(1-4)-2,3-di-O-methyl-beta-D-glucopyranuronic acid-(1-4)-2,3,6-tri-O-sulfo-alpha-D-glucopyranose-(1-4)-2,3-di-O-methyl-alpha-L-idopyranuronic acid-(1-4)-methyl 3-O-methyl-2,6-di-O-sulfo-alpha-D-glucopyranoside ; × 1 ;alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose ; × 1 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 GOL GLYCEROL × 12 SO4 SULFATE ION × 6 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.4;294 K;PEG3350, glycerol, ammonium sulfate, (crystallized with NaCl and tris, but not in cryoprotectant), pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 294K Resolution 2.10 Å R-free 0.247
2 Other combination Heteromer Protein × 5 其他Polymer 5 PDB declaration: pentameric(5) Consistent with protein copy count Chain I; UniProt 33–464 Mutation:I15M, S137A, V317C, T401C Thrombin × 2 (P00734) Thrombin × 2 (P00734) alpha-L-fucopyranose-(1-6)-2-acetamido-2-deoxy-beta-D-glucopyranose × 2 ;2,3,4,6-tetra-O-sulfonato-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-sulfo-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-sulfonato-beta-D-glucopyranose-(1-4)-2,3-di-O-methyl-6-O-sulfonato-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-beta-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-beta-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-beta-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-alpha-D-glucopyranose-(1-4)-2,3,6-tri-O-methyl-beta-D-glucopyranose-(1-4)-2,3-di-O-methyl-6-O-sulfonato-alpha-D-glucopyranose-(1-4)-2,3-di-O-methyl-beta-D-glucopyranuronic acid-(1-4)-2,3,6-tri-O-sulfo-alpha-D-glucopyranose-(1-4)-2,3-di-O-methyl-alpha-L-idopyranuronic acid-(1-4)-methyl 3-O-methyl-2,6-di-O-sulfo-alpha-D-glucopyranoside ; × 1 ;alpha-D-mannopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose ; × 1 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 GOL GLYCEROL × 12 SO4 SULFATE ION × 6 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.4;294 K;PEG3350, glycerol, ammonium sulfate, (crystallized with NaCl and tris, but not in cryoprotectant), pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 294K Resolution 2.10 Å R-free 0.247

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.

26 other PDB entries and 42 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name ANT3_HUMAN
Isoform
PDB entities 3
Chains and sequence ranges Author chain I; PDBConstruct 1–432; UniProt 33–464

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 2b5t

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 2b5t
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2. Structure Basics 2. Structure Basics

Entry ID entry_id2b5t
Deposition date deposition_date2005-09-29
Structure title title2.1 Angstrom structure of a nonproductive complex between antithrombin, synthetic heparin mimetic SR123781 and two S195A thrombin molecules
Keywords keywordsBlood coagulation, Blood Clotting; BLOOD CLOTTING
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier37.56
Radius of gyration Rg (electron density) rg_electron37.13
Forward intensity I(0) i0238256000.00
Molecular weight molecular_weight122920.0 kDa
Excluded volume excluded_volume152870 ų
Envelope volume envelope_volume202510 ų
Hydration-shell volume shell_volume45803 ų
Envelope diameter envelope_diameter141.3
Shell Rg shell_rg42.93
Envelope Rg envelope_rg36.58
Shape Rg shape_rg37.13
Total Rg total_rg37.47
Total atoms total_atoms8595
Residues n_residues903
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 dmax127.7
Rg (real space) rg_real37.56
Rg uncertainty (real space) rg_real_error0.95
I(0) (real space) i0_real2.3830e+08
I(0) uncertainty (real space) i0_real_error3.7730e+06
Rg (reciprocal space) rg_reciprocal37.57
I(0) (reciprocal space) i0_reciprocal238300000.0000
Solution quality estimate total_estimate0.8832
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks3
Primary peak position r_peak_primary54.7
Skewness Skewness skewness0.254
Kurtosis Kurtosis kurtosis-0.503
Angular range angular_range— – 0.2100 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha92600000.0000
Real-space data points n_real_points43
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.842; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.978; Smooth: 0.974

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (11)

7. Fold Classification (SCOP + CATH) 9 domains

SCOP 2.08 (1 domains)

Domain ID domain_idd2b5ti_
Class classe — Multi-domain proteins (alpha and beta)
Fold Fold folde.1 — Serpins
Superfamily Superfamily superfamilye.1.1 — Serpins
Family Family familye.1.1.1 — Serpins

CATH v4.4 (8 domains)

Domain ID domain_id2b5tA00
Class class4 — Few Secondary Structures
Architecture architecture10 — Irregular
Topology topology140 — Epsilon-Thrombin; Chain L
Homologous superfamily homologous superfamily10 — Thrombin light chain domain
Domain ID domain_id2b5tB01
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases
Domain ID domain_id2b5tB02
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases
Domain ID domain_id2b5tC00
Class class4 — Few Secondary Structures
Architecture architecture10 — Irregular
Topology topology140 — Epsilon-Thrombin; Chain L
Homologous superfamily homologous superfamily10 — Thrombin light chain domain
Domain ID domain_id2b5tD01
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases
Domain ID domain_id2b5tD02
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases
Domain ID domain_id2b5tI01
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology497 — Antithrombin; Chain I, domain 2
Homologous superfamily homologous superfamily10 — Antithrombin, subunit I, domain 2
Domain ID domain_id2b5tI02
Class class2 — Mainly Beta
Architecture architecture30 — Roll
Topology topology39 — Alpha-1-antitrypsin; domain 1
Homologous superfamily homologous superfamily10 — Alpha-1-antitrypsin, domain 1

8. Citations (1)

9. Files and Curves (10)