1b2u

STRUCTURAL RESPONSE TO MUTATION AT A PROTEIN-PROTEIN INTERFACE

Method: X-RAY DIFFRACTION Dmax: 97.9 Å Quality: GOOD

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

PROTEIN (BARNASE)

Bacillus amyloliquefaciens

UniProt P00648

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 × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain A; UniProt 48–157 Mutation:K27A PROTEIN (BARSTAR) × 1 (P11540) X-RAY DIFFRACTION X-ray crystallization conditions:pH 6.5;21% PEG-8K 0.2 M AMMONIUM SULPHATE 0.1 M NA CACODYLATE PH6.5 Resolution 2.10 Å R-free 0.276
2 Protein heterocomplex Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain B; UniProt 48–157 Mutation:K27A PROTEIN (BARSTAR) × 1 (P11540) X-RAY DIFFRACTION X-ray crystallization conditions:pH 6.5;21% PEG-8K 0.2 M AMMONIUM SULPHATE 0.1 M NA CACODYLATE PH6.5 Resolution 2.10 Å R-free 0.276
3 Protein heterocomplex Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain C; UniProt 48–157 Mutation:K27A PROTEIN (BARSTAR) × 1 (P11540) X-RAY DIFFRACTION X-ray crystallization conditions:pH 6.5;21% PEG-8K 0.2 M AMMONIUM SULPHATE 0.1 M NA CACODYLATE PH6.5 Resolution 2.10 Å R-free 0.276

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.

51 other PDB entries and 135 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name RNBR_BACAM
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–110; UniProt 48–157 Author chain B; PDBConstruct 1–110; UniProt 48–157 Author chain C; PDBConstruct 1–110; UniProt 48–157

PROTEIN (BARSTAR)

Bacillus amyloliquefaciens

UniProt P11540

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 × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain D; UniProt 1–89 Mutation:D36A PROTEIN (BARNASE) × 1 (P00648) X-RAY DIFFRACTION X-ray crystallization conditions:pH 6.5;21% PEG-8K 0.2 M AMMONIUM SULPHATE 0.1 M NA CACODYLATE PH6.5 Resolution 2.10 Å R-free 0.276
2 Protein heterocomplex Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain E; UniProt 1–89 Mutation:D36A PROTEIN (BARNASE) × 1 (P00648) X-RAY DIFFRACTION X-ray crystallization conditions:pH 6.5;21% PEG-8K 0.2 M AMMONIUM SULPHATE 0.1 M NA CACODYLATE PH6.5 Resolution 2.10 Å R-free 0.276
3 Protein heterocomplex Heteromer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain F; UniProt 1–89 Mutation:D36A PROTEIN (BARNASE) × 1 (P00648) X-RAY DIFFRACTION X-ray crystallization conditions:pH 6.5;21% PEG-8K 0.2 M AMMONIUM SULPHATE 0.1 M NA CACODYLATE PH6.5 Resolution 2.10 Å R-free 0.276

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.

20 other PDB entries and 48 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name BARS_BACAM
Isoform
PDB entities 2
Chains and sequence ranges Author chain D; PDBConstruct 2–90; UniProt 1–89 Author chain E; PDBConstruct 2–90; UniProt 1–89 Author chain F; PDBConstruct 2–90; UniProt 1–89

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 1b2u

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 1b2u
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2. Structure Basics 2. Structure Basics

Entry ID entry_id1b2u
Deposition date deposition_date1998-12-01
Structure title titleSTRUCTURAL RESPONSE TO MUTATION AT A PROTEIN-PROTEIN INTERFACE
Keywords keywordsRNASE-INHIBITOR COMPLEX, INTERFACIAL DOUBLE MUTANT, HYDROLASE-HYDROLASE INHIBITOR COMPLEX; HYDROLASE/HYDROLASE INHIBITOR
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier30.13
Radius of gyration Rg (electron density) rg_electron29.67
Forward intensity I(0) i069825900.00
Molecular weight molecular_weight66267.0 kDa
Excluded volume excluded_volume83124 ų
Envelope volume envelope_volume104400 ų
Hydration-shell volume shell_volume30370 ų
Envelope diameter envelope_diameter101.4
Shell Rg shell_rg35.32
Envelope Rg envelope_rg29.66
Shape Rg shape_rg29.60
Total Rg total_rg30.41
Total atoms total_atoms4688
Residues n_residues587
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 dmax97.9
Rg (real space) rg_real30.12
Rg uncertainty (real space) rg_real_error0.65
I(0) (real space) i0_real6.9830e+07
I(0) uncertainty (real space) i0_real_error1.0520e+06
Rg (reciprocal space) rg_reciprocal30.13
I(0) (reciprocal space) i0_reciprocal69830000.0000
Solution quality estimate total_estimate0.8951
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary38.8
Skewness Skewness skewness0.255
Kurtosis Kurtosis kurtosis-0.533
Angular range angular_range— – 0.2650 −1
Current regularization parameter α current_alpha0.0001
Highest regularization parameter α highest_alpha19480000.0000
Real-space data points n_real_points54
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.926; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.968; Smooth: 0.887

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (3)

7. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

Domain ID domain_idd1b2ua_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.1 — Microbial ribonucleases
Superfamily Superfamily superfamilyd.1.1 — Microbial ribonucleases
Family Family familyd.1.1.2 — Bacterial ribonucleases
Domain ID domain_idd1b2ub_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.1 — Microbial ribonucleases
Superfamily Superfamily superfamilyd.1.1 — Microbial ribonucleases
Family Family familyd.1.1.2 — Bacterial ribonucleases
Domain ID domain_idd1b2uc_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.1 — Microbial ribonucleases
Superfamily Superfamily superfamilyd.1.1 — Microbial ribonucleases
Family Family familyd.1.1.2 — Bacterial ribonucleases
Domain ID domain_idd1b2ud_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.9 — Barstar-like
Superfamily Superfamily superfamilyc.9.1 — Barstar-related
Family Family familyc.9.1.1 — Barstar-related
Domain ID domain_idd1b2ue_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.9 — Barstar-like
Superfamily Superfamily superfamilyc.9.1 — Barstar-related
Family Family familyc.9.1.1 — Barstar-related
Domain ID domain_idd1b2uf_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.9 — Barstar-like
Superfamily Superfamily superfamilyc.9.1 — Barstar-related
Family Family familyc.9.1.1 — Barstar-related

CATH v4.4 (6 domains)

Domain ID domain_id1b2uA00
Class class3 — Alpha Beta
Architecture architecture10 — Roll
Topology topology450 — Nuclear Transport Factor 2; Chain: A,
Homologous superfamily homologous superfamily30 — Microbial ribonucleases
Domain ID domain_id1b2uB00
Class class3 — Alpha Beta
Architecture architecture10 — Roll
Topology topology450 — Nuclear Transport Factor 2; Chain: A,
Homologous superfamily homologous superfamily30 — Microbial ribonucleases
Domain ID domain_id1b2uC00
Class class3 — Alpha Beta
Architecture architecture10 — Roll
Topology topology450 — Nuclear Transport Factor 2; Chain: A,
Homologous superfamily homologous superfamily30 — Microbial ribonucleases
Domain ID domain_id1b2uD00
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology370 — Barnase; Chain D
Homologous superfamily homologous superfamily10 — Barstar-like
Domain ID domain_id1b2uE00
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology370 — Barnase; Chain D
Homologous superfamily homologous superfamily10 — Barstar-like
Domain ID domain_id1b2uF00
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology370 — Barnase; Chain D
Homologous superfamily homologous superfamily10 — Barstar-like

8. Citations (6)

9. Files and Curves (10)