1by8

THE CRYSTAL STRUCTURE OF HUMAN PROCATHEPSIN K

Method: X-RAY DIFFRACTION Dmax: 72.7 Å Quality: REASONABLE

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

PROTEIN (PROCATHEPSIN K)

Homo sapiens

UniProt P43235

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 monomer Monomer Protein × 1 PDB declaration: monomeric(1) Consistent with protein copy count Chain A; UniProt 16–329 Not recorded No other associated polymer X-RAY DIFFRACTION X-ray crystallization conditions:pH 5;8-10 % PEG 6000, 0.1M NA CITRATE, PH 5.0 Resolution 2.60 Å R-free 0.344

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.

69 other PDB entries and 83 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name CATK_HUMAN
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–314; UniProt 16–329

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 1by8

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 1by8
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2. Structure Basics 2. Structure Basics

Entry ID entry_id1by8
Deposition date deposition_date1998-10-27
Structure title titleTHE CRYSTAL STRUCTURE OF HUMAN PROCATHEPSIN K
Keywords keywordsHYDROLASE(SULFHYDRYL PROTEINASE), PAPAIN, HYDROLASE; HYDROLASE
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier20.86
Radius of gyration Rg (electron density) rg_electron20.02
Forward intensity I(0) i022189700.00
Molecular weight molecular_weight34814.0 kDa
Excluded volume excluded_volume43172 ų
Envelope volume envelope_volume50999 ų
Hydration-shell volume shell_volume21285 ų
Envelope diameter envelope_diameter71.6
Shell Rg shell_rg26.70
Envelope Rg envelope_rg20.51
Shape Rg shape_rg19.99
Total Rg total_rg20.98
Total atoms total_atoms2447
Residues n_residues310
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 dmax72.7
Rg (real space) rg_real20.81
Rg uncertainty (real space) rg_real_error0.44
I(0) (real space) i0_real2.2190e+07
I(0) uncertainty (real space) i0_real_error2.8600e+05
Rg (reciprocal space) rg_reciprocal20.82
I(0) (reciprocal space) i0_reciprocal22190000.0000
Solution quality estimate total_estimate0.6748
Solution quality rating solution_quality REASONABLE a REASONABLE solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary24.2
Skewness Skewness skewness0.317
Kurtosis Kurtosis kurtosis-0.244
Angular range angular_range— – 0.3800 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha5334000.0000
Real-space data points n_real_points70
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.751; Stabil: 1.000; Sysdev: 0.177; Positv: 1.000; Valcen: 0.985; Smooth: 0.999

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (1)

7. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_idd1by8a_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.3 — Cysteine proteinases
Superfamily Superfamily superfamilyd.3.1 — Cysteine proteinases
Family Family familyd.3.1.1 — Papain-like

CATH v4.4 (1 domains)

Domain ID domain_id1by8A00
Class class3 — Alpha Beta
Architecture architecture90 — Alpha-Beta Complex
Topology topology70 — Cathepsin B; Chain A
Homologous superfamily homologous superfamily10 — Cysteine proteinases

8. Citations (1)

9. Files and Curves (10)