1acb

CRYSTAL AND MOLECULAR STRUCTURE OF THE BOVINE ALPHA-CHYMOTRYPSIN-EGLIN C COMPLEX AT 2.0 ANGSTROMS RESOLUTION

Method: X-RAY DIFFRACTION Dmax: 63.3 Å Quality: GOOD

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

ALPHA-CHYMOTRYPSIN

Bos taurus

UniProt P00766

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 E; UniProt 1–245 Not recorded Eglin C × 1 (P01051) X-RAY DIFFRACTION mmCIF provides none of the parsed experimental conditions Resolution 2.00 Å

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.

91 other PDB entries and 177 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name CTRA_BOVIN
Isoform
PDB entities 1
Chains and sequence ranges Author chain E; PDBConstruct 1–245; UniProt 1–245

Eglin C

Hirudo medicinalis

UniProt P01051

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 I; UniProt 1–70 Not recorded ALPHA-CHYMOTRYPSIN × 1 (P00766) X-RAY DIFFRACTION mmCIF provides none of the parsed experimental conditions Resolution 2.00 Å

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.

15 other PDB entries and 19 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name ICIC_HIRME
Isoform
PDB entities 2
Chains and sequence ranges Author chain I; PDBConstruct 1–70; UniProt 1–70

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 1acb

P(r) Distance Distribution P(r) Distribution

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

Entry ID entry_id1acb
Deposition date deposition_date1991-11-08
Structure title titleCRYSTAL AND MOLECULAR STRUCTURE OF THE BOVINE ALPHA-CHYMOTRYPSIN-EGLIN C COMPLEX AT 2.0 ANGSTROMS RESOLUTION
Keywords keywordsSERINE PROTEASE, 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_guinier19.88
Radius of gyration Rg (electron density) rg_electron19.02
Forward intensity I(0) i018491300.00
Molecular weight molecular_weight32538.0 kDa
Excluded volume excluded_volume40705 ų
Envelope volume envelope_volume46262 ų
Hydration-shell volume shell_volume20295 ų
Envelope diameter envelope_diameter64.2
Shell Rg shell_rg25.38
Envelope Rg envelope_rg19.31
Shape Rg shape_rg19.02
Total Rg total_rg19.88
Total atoms total_atoms2289
Residues n_residues304
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 dmax63.3
Rg (real space) rg_real19.80
Rg uncertainty (real space) rg_real_error0.37
I(0) (real space) i0_real1.8490e+07
I(0) uncertainty (real space) i0_real_error2.4320e+05
Rg (reciprocal space) rg_reciprocal19.81
I(0) (reciprocal space) i0_reciprocal18490000.0000
Solution quality estimate total_estimate0.8128
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary25.0
Skewness Skewness skewness0.285
Kurtosis Kurtosis kurtosis-0.282
Angular range angular_range— – 0.4000 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha6133000.0000
Real-space data points n_real_points72
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.856; Stabil: 0.999; Sysdev: 1.000; Positv: 1.000; Valcen: 1.000; Smooth: 0.000

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (3)

7. Fold Classification (SCOP + CATH) 5 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd1acbe_
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
Domain ID domain_idd1acbi_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.40 — CI-2 family of serine protease inhibitors
Superfamily Superfamily superfamilyd.40.1 — CI-2 family of serine protease inhibitors
Family Family familyd.40.1.1 — CI-2 family of serine protease inhibitors

CATH v4.4 (3 domains)

Domain ID domain_id1acbE01
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases
Domain ID domain_id1acbE02
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases
Domain ID domain_id1acbI00
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology10 — Trypsin Inhibitor V; Chain A
Homologous superfamily homologous superfamily10 — Trypsin Inhibitor V, subunit A

8. Citations (3)

9. Files and Curves (10)