1SFI

High resolution structure of a potent, cyclic protease inhibitor from sunflower seeds

Structural Biology Knowledgebase: 1SFI SBKB.org


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.204
  • R-Value Work: 0.175

wwPDB Validation Full Report


Literature

Macromolecules
Sequence Display for 1SFI

Classification: HYDROLASE / HYDROLASE INHIBITOR

Total Structure Weight: 25188.48

Macromolecule Entities
Molecule Chains Length Organism Details
TRYPSIN A 223 Bos taurus EC#: 3.4.21.4 IUBMB
Gene Name(s):
Trypsin inhibitor 1 I 14 Helianthus annuus Details: CYCLIC PEPTIDE
Gene Name(s): sfti1

Small Molecules
Ligands 2 Unique
ID Chains Name / Formula / InChI Key 2D Diagram 3D Interactions
SO4
Query on SO4

A SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
Ligand Explorer
 
Binding Pocket (JSmol)
 
Electron Density (JSmol)
CA
Query on CA

A CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
Ligand Explorer
 
Binding Pocket (JSmol)
 
Electron Density (JSmol)

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.204
  • R-Value Work: 0.175
  • Space Group: P 21 21 21

Unit Cell:

Length (Å) Angle (°)
a = 60.61 α = 90.00
b = 64.43 β = 90.00
c = 70.62 γ = 90.00

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History

Deposition Data

  • Deposited Date: 1998-12-16
  • Released Date: 1999-07-09
  • Deposition author(s): Luckett, S., Garcia, R.S., Barker, J.J., Konarev, A.V., Shewry, P., Clarke, A.R., Brady, R.L.

Revision History

  • 2011-07-13
    Type: Version format compliance | Details: compliance with PDB Exchange Dictionary V4
  • 2011-07-13
    Type: Atom nomenclature | Details: Atom nomenclature
  • 2011-07-13
    Type: Binding sites and description | Details: Binding sites and description
  • 2011-07-13
    Type: Non-polymer description | Details: Non-polymer description
  • 2011-07-13
    Type: Function and keywords | Details: Function and keywords
  • 2011-07-13
    Type: Linkage | Details: Linkage
  • 2011-07-13
    Type: Sequence database correspondence | Details: Sequence database correspondence
  • 2011-07-13
    Type: Polymer description | Details: Changed inhibitor presentation or chemistry