1PCI

PROCARICAIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.226 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The prosequence of procaricain forms an alpha-helical domain that prevents access to the substrate-binding cleft.

Groves, M.R.Taylor, M.A.Scott, M.Cummings, N.J.Pickersgill, R.W.Jenkins, J.A.

(1996) Structure 4: 1193-1203


  • PubMed Abstract: 
  • Cysteine proteases are involved in a variety of cellular processes including cartilage degradation in arthritis, the progression of Alzheimer's disease and cancer invasion: these enzymes are therefore of immense biological importance. Caricain is the ...

    Cysteine proteases are involved in a variety of cellular processes including cartilage degradation in arthritis, the progression of Alzheimer's disease and cancer invasion: these enzymes are therefore of immense biological importance. Caricain is the most basic of the cysteine proteases found in the latex of Carica papaya. It is a member of the papain superfamily and is homologous to other plant and animal cysteine proteases. Caricain is naturally expressed as an inactive zymogen called procaricain. The inactive form of the protease contains an inhibitory proregion which consists of an additional 106 N-terminal amino acids; the proregion is removed upon activation.


    Related Citations: 
    • Determination of the Structure of Papaya Protease Omega
      Pickersgill, R.W.,Rizkallah, P.,Harris, G.W.,Goodenough, P.W.
      (1991) Acta Crystallogr.,Sect.B 47: 766


    Organizational Affiliation

    Department of Food Macromolecular Science, Institute of Food Research, Reading, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROCARICAIN
A, B, C
322Carica papayaMutation(s): 1 
EC: 3.4.22.30
Find proteins for P10056 (Carica papaya)
Go to UniProtKB:  P10056
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.2 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.226 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 84.000α = 90.00
b = 205.400β = 90.00
c = 192.200γ = 90.00
Software Package:
Software NamePurpose
RAVEphasing
X-PLORphasing
DENZOdata reduction
CCP4data reduction
DMphasing
CCP4data scaling
X-PLORmodel building
RAVEmodel building
DMmodel building
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-04-01
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance