1TRN

CRYSTAL STRUCTURE OF HUMAN TRYPSIN 1: UNEXPECTED PHOSPHORYLATION OF TYROSINE 151


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Work: 0.177 
  • R-Value Observed: 0.177 

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This is version 1.2 of the entry. See complete history


Literature

Crystal structure of human trypsin 1: unexpected phosphorylation of Tyr151.

Gaboriaud, C.Serre, L.Guy-Crotte, O.Forest, E.Fontecilla-Camps, J.C.

(1996) J Mol Biol 259: 995-1010

  • DOI: 10.1006/jmbi.1996.0376
  • Primary Citation of Related Structures:  
    1TRN

  • PubMed Abstract: 
  • The X-ray structure of human trypsin 1 has been determined in the presence of diisopropyl-phosphofluoridate by the molecular replacement method and refined at a resolution of 2.2 A to an R-factor of 18%. Crystals belong to the space group P4, with tw ...

    The X-ray structure of human trypsin 1 has been determined in the presence of diisopropyl-phosphofluoridate by the molecular replacement method and refined at a resolution of 2.2 A to an R-factor of 18%. Crystals belong to the space group P4, with two independent molecules in the asymmetric unit packing as crystallographic tetramers. This study was performed in order to seek possible structural peculiarities of human trypsin 1, suggested by some striking differences in its biochemical behavior as compared to other trypsins of mammalian species. Its fold is, in fact, very similar to those of the bovine, rat and porcine trypsins, with root-mean-square differences in the 0.4 to 0.6 A range for all 223 C alpha positions. The most unexpected feature of the human trypsin 1 structure is in the phosphorylated state of tyrosine residue 151 in the present X-ray study. This feature was confirmed by mass spectrometry on the same inhibited sample and also on the native enzyme. This phosphorylation strengthens the outstanding clustering of highly negative or highly positive electrostatic surface potentials. The peculiar inhibitory behaviour of pancreatic secretory trypsin inhibitors of the Kazal type on this enzyme is discussed as a possible consequence of these properties. A charged surface loop has also been interpreted as an epitope site recognised by a monoclonal antibody specific to human trypsin 1.


    Organizational Affiliation

    Laboratoire de Cristallographie et Cristallogénèse des Protéines, Institut de Biologie Structurale Jean-Pierre Ebel (CEA-CNRS), Grenoble, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TRYPSINAB224Homo sapiensMutation(s): 0 
Gene Names: PRSS1TRP1TRY1TRYP1
EC: 3.4.21.4
Find proteins for P07477 (Homo sapiens)
Explore P07477 
Go to UniProtKB:  P07477
NIH Common Fund Data Resources
PHAROS  P07477
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ISP
Query on ISP

Download Ideal Coordinates CCD File 
A, B
PHOSPHORYLISOPROPANE
C3 H9 O4 P
QPPQHRDVPBTVEV-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PTR
Query on PTR
A,BL-PEPTIDE LINKINGC9 H12 N O6 PTYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Work: 0.177 
  • R-Value Observed: 0.177 
  • Space Group: P 4
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 107.12α = 90
b = 107.12β = 90
c = 39.92γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-06-03
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance